juandante

On 1/28/2023 at 4:28 PM, darkshvein said:

good day, all.

sorry for offtop, but can you suggest me other socketted cpu laptops? google have no single list(

Note that if your sole purpose is to have a socketed laptop, any cheap i5 is faster and cooler and battery efficient than the best i7 socketed laptop back in the day. 

Now, one BIG advantage of socketed laptops is that they usually have a lot of internal and external ports and in consequence storage upgrade possibilities, that's why I still have the 2570p. You can upgrade a lot of things, one day make it powerful, another day make it lightweight and power efficient. It is a lot of fun to have control on your laptop.

On other hands, if you can search very good, some rare HP/dell/lenovo etc professional/enterprise ultrabooks do offer the same number of internal and external ports, and they have bigger screen like 14-15 inch and almost identical phisical size as the 2570p because of the bezels and thickness of old laptops

If you get a 2570p in 2023 it must be maximum 50 bucks, if you want to spend more than 100 bucks on any laptop still in 2023 you must get a recent at least a gen 8 (before gen 8 pretty much all Intel CPU where shitty only exception is the 45W laptop i7 but they where not socketed begining 4th Gen), or get an AMD (the recent AMD laptops after 2020 are exceptionnal, faster in all aspects and cheaper than Intel)

The 2570p is still one of the best for 12 inch if you manage to get one for 50 bucks, as well as its lenovo counterpart (forgot the name but you can search this thread) 

No need to upgrade heatsink.

I am running a 3940xm since a year and the CPU will max out at 3.6 Ghz on 6 cores, 3.2 Ghz on 8 cores (obviously with HT, knowing that the max freq on 8 cores is 3.6 Ghz, but the BIOS is virtually limiting the multiplier on the XM editions to 3.2 Ghz). Means : I will run at 3.0 Ghz in stress test at ~95°C. So a 3840 QM will max out without problem at maybe 80-85°C or even 95°C because my XM is clamped.

The solution ? Buy good thermal paste. Thermal Grizzly Kryonaut, I gained 10-15°C (maybe even more) only by swapping this thermal paste. Drastic change. I drilled a small hole (half the size of a penny). also on the back. I can even run fan off with good ThrottleStop settings.

On 3/23/2022 at 1:09 PM, istinnstudio said:

 

 

... could you share the modded and the original bios and somehow describe the binary edit (hex edit?)

I was wondering if this is possible in an already updated 2570p to the latest bios, downgrade to 1.41 or modify the latest bios could be possible options (?).

 

+1

On 2/6/2022 at 8:44 PM, chih said:

Successfully installed a Sierra MC7455 card in 2570p WWAN. Used the WWANDOS utility and there was no whitelist error.

Very good. The original 3G is a pain in the *ss, I couldn't even watch a Yt video. It is hard to imagine people where using  such slow 3G cards back in the day, lol. 3G+ is the bare minimum for modern internet.

Also, for people looking for a replacement of the 2570p, the latest Dell Latitude 5521 are very good (they where out maybe last year or in 2020). I used it and it reminded me of the 2570p (multiple ports, etc). But the most impressive is that the Latitude is 15" is slightly bigger but it really feels as light and portable as the 2570p for all what it can do. Also, the CPU is 2x even 3x faster. Unfortunatly as we all know, newer CPUs are not swappable in newer laptops.

On 8/29/2021 at 3:29 PM, mikmaze said:

checking in from my now windows 11 pro os on the 2570, thought it wasn't going to be supported, but being on the insider program it updated, and is running fine.    anyone else upgrade to 11?

Please stop with this negligence. "Insider program" = "Beta". It is a marketing term. Running Beta software is risky towards final software. We saw this endless times. The real question, is the computer upgradable on TPM chip ?

I had a 3820QM and it was almost never throttling except when hot (100°). If no thermal throttle, it maxed out at arround 40W with 90W charger. I thing the 5W difference (b/c it is rated 45W) is for the GPU, even with TurboBoost the 3820QM was not exceeding 40W with good cooling and almost never throttled. See my previous posts.

What about TPM 2.0 ? Is the 2570p compatible with Windows 11 natively, with mods ? Is the TPM 1.2 chip of the 2570p upgradable ?

On 3/27/2021 at 4:05 PM, John Entwistle said:

I have an Opolar and I love it. It has both a temporary clamp-on or permanent mount option. I just use the temporary clamp when I want to use my 3940xm CPU, (this is not an endorsement of using the 3940xm CPU with the 2570p. I had the CPU available to experiment and probably am lucky that I don’t have any issues. I recommend reading other member’s recommendations), to encode video and it works great. No need to slow it down as it doesn’t thermal-throttle with the Opolar set on maximum speed. You can adjust the Opolar speed manually or set it to automatic. I have no other temperature cooling mods. I even just used the thermal grease that Intel (scripts automatique d'installation [local ou via lan])d with the 3940xm CPU. I didn’t buy any special thermal compound. I’ve never been impressed with aftermarket thermal compounds. I like the Opolar vacuum cooler the best, because when I researched them, the other brands just sat next to the laptop. They didn’t include any clamping hardware. The Opolar isn’t silent, but I wouldn’t say that it’s sound is objectionable. It is a smooth sound even at it’s highest setting. Also, the clamping equipment came with 3 different-sized rubber seals. I used the largest seal and it works great. It fits between the USB/SATA port and extends to cover the rest of the right side of the 2570p clear to the back. The Opolar intake port then lines up well with the 2570p’s exhaust grill.
 

I still use my 2570p extensively for video work since it’s nicely portable and includes the optical drive, which I upgraded to one of the first Blu-Ray drives that is “4K-UHD compatible,” and still running it’s original BIOS so that it can read 4K-UHD disks while ignoring their copyright protection. Other mods are a Samsung 4TB SSD 860 Pro, 16GB RAM, Intel AC7260 802.11AC WAN adapter, (which is failing and needs replaced), and Windows 10 Pro set to delay Feature Updates for 18 months (maximum) and delay Security Updates for 30 days (maximum) in order to minimize problems.

 

I wish you good luck and maximum utility value from your modification choices

So there is no thermal throttle with the 3940XM (and in consequence, all less power-hungry CPUs as the 3820QM, etc) ? What is the maximum CPU temps in ThrottleStop (screenshot) ? If there is no thermal throttling, this will be undoubtedly the best "simple" mod for the 2570p to unleash its full power.

I did some basic calculations and the 3820QM if there was no throttling would bring the CPU to more than 120°C (at full power the CPU is throttling at about 25W on my laptop, while its normal power is 40W on the 2570p), I find it hard to believe that this cooler can bring down the laptop to 20°C (at least) to limit throttling. I tried a lot of impractical cooling methods (even the freezer, lol) and never managed to bring down the CPU to less than 100°C with no throttling in full load for more than a handful of minutes. How is this possible ? Can you post more information (room temperature, CPU temps, run time, screenshots) ?

Hello,

I am wondering if someone already tried a vacuum cooler on the 2570p as seen below ? My goal is double :

1/ be able to use the laptop in silent mode (the default fan of the 2570p is not enough silent even at lower RPMs) so the vacuum cooler can "replace" the internal fan when the CPU is in low performance mode and

2/ reduce thermal throttling for the quad-cores in high performance mode (the default fan is not enough powerful, even with upgraded heatpipes).

Also, what do you think about thermoelectric pads ? A thermoelectric pad is like a "mini freezer" (doesn't need any fan or water to cool down something, but needs far more power). My second choice would be to use this pad plugged on an external powersouce (USB seems not enough powerful). Also, there are pads specifically made for smartphones, obviously they will not be able to cool down a full fledge laptop CPU but they could help to reduce the heat in power-saving mode, with no external battery. Nevertheless, didn't find suitable ones for the laptop, and here is a standard thermoelectric pad : https://www.amazon.fr/KIMILAR-Dissipateur-Refroidisseur-thermoélectrique-refroidissement/dp/B00ITMJPCU/ref=sr_1_2?__mk_fr_FR=ÅMÅŽÕÑ&dchild=1&keywords=powerful+laptop+cooler+peltier&qid=1616708231&sr=8-2

And a vacuum cooler :

https://www.amazon.com/LC05-Cooling-Auto-Temp-Detection-Compatible/dp/B00XKU47Y2/ref=as_li_ss_tl?keywords=opolar+laptop&qid=1581658306&sr=8-2&linkCode=sl1&tag=root0d5-20&linkId=70b64017e0966f958d12ef53d92908ed&language=en_US

1 hour ago, Atheros said:

 

 

Will fit 2560p Hinges in the 2570p Model too?

Of course they will fit, it is the exact same laptop. The only difference between the two laptops is the light sensor removed on the 2570p on top of the screen.

On 1/5/2021 at 2:35 PM, batyanko said:

Idle consumption of quad i7 should be comparable to dual core, so it seems that certain things create load for the CPU.

It seems you will need to do some research on what uses background CPU, which could be something as ridiculous as the Google animation on Chrome start page.

Common heavy offenders are website ads or background Windows 10 processes, but the latter is only fixed by switching to Linux...

 

And of course you could underclock, I do this often on battery. 1200Mhz is I think minimum for most Ivy Bridge, 4 cores at that frequency is alright for office work.

Nice thing about this, SpeedStep dynamically lowers voltage at lower frequency, so underclocking is extra efficient.

Your benchmarks where interesting, but I observed the same lowering in battery life when I switched from dual core to quad core. I don't have my dual core anymore, to test again. I think that in your benchmarks the problem comes in full load, indeed, the dual core will be at full load of 2.4 Ghz (let's say), but the quad-core will also be at 2.4 Ghz in full load in Windows. When I say full load, I talk about medium load also (it is scarce to use a laptop in 100% idle, watching a film can be considered as idle but browsing Internet on the greddy Chrome, not very much).

I would be interested to see the benchmark of system consumption with 2.4 Ghz (lets say) for the dual-core and quad-core. For sure it will be 2x more CPU consumption for the quad-core.

Nevertheless, the quad-core should perform 2 times quicker than the dual-core, thus finishing the task 2 times earlier, but I doubt that Windows CPU governor is efficient to the point that it would turn off the corres as quickly as they stopped working.  This would explain why I had this feeling also of the battery draining far more quickly on quad core than dual core, because in medium or full load, all the cores turns on (consuming 2x more power), and they don't turn off as quickly as they turn on.

Edit : I was that you are on Linux Mint, maybe the governor is tweaked. But the reasoning on Windows (and thus, the consumption at 2.4 Ghz lets say, and full cores meaning 2c/4t for the dual core and consumption at 2.4 Ghz at 4c/8t should be still valid)

Edit

On 7/25/2020 at 9:28 PM, ElitebookSurvivor said:

Hi all, proud owner of a 2570p here. I believe I've had mine for about 7 years now and going strong. Recently upgraded the RAM to 16GB DDRL. 

 

I'm going back to a graduate school program and am looking to upgrade it, though. It got me through my undergrad but I want to make sure it can handle another couple of years of heavy use. After reading the first page (isn't reading grand), I've purchased the following upgrades:

 

Intel Network 7260.HMWG.R Revised WiFi Wireless-AC Dual Band 2x2 AC+Bluetooth

Samsung SM841 256GB 2.5" SATA SSD ORDINATEUR MILLIEU DE RELAIS P/N: 08Y70H MZ-7PD256D (MZ7PD256HAFV-000D1)

Intel Core i7 i7-3740QM 2.70 GHz Processor - Socket G2 BX80638I73740QM

 

Would love any feedback on these upgrades including things to watch out for when putting together. I know I'll have to transfer information from my existing SSD to the new one, does anyone recommend a good system?

 

I was also thinking of getting an eGPU for a 3 (maybe 4) monitor setup (right now I have two with the docking station and laptop closed), and found this:

https://www.amazon.com/EVGA-GeForce-SUPERCLOCKED-Graphics-02G-P4-2662-KR/ordinateur millieu de relais/B00966IREK/ref=psdc_284822_t3_B003VWW2KK

 

But that's about where my knowledge ended. I understand that it'll connect to the expresscard 34 slot, but I don't understand how the adapter connects to the eGPU. What cable am I missing? Also: For merely adding more monitors, is an eGPU recommended? Or can one just daisy chain?

 

I've had this thread bookmarked for years, very happy to be here now.

 

I would recommend you to go for the best. You have 16 Gb of RAM, so you need power. I have a 3820QM and I sometimes throttle but even with the throttle I have better benchmarks than 3610QM or dual core CPU (tested). If I could buy a 3940XM I would have done this. Contrary to what the first post says, in Windows any quad-core can be software limited to two-cores or one core, so if you need battery well this can easily be done in Windows.

I will idle with this configuration dual-core mode on quad-core with 0.5W more than a real dual-core (tested between my original i5 35xxM and the i7 3820QM I have). This is negligeable towards all the speed advantages of the quad-core. All depends to you, do you want quad-core with negligable battery hit (I would not say 1 hour, more like 20-30 minutes with easily tweaking Windows, but this is nothing, if you need battery just buy a newer laptop), or do you want speed and a real work-station you can plug on an external monitor and have desktop like performance. Thus, this is less and less true with the latest Intel i7 10-gen processors, even i5 and AMD, caping at more than 4 Ghz.

The three big limiting factors of the 2570p according to me :

1/ Noisy with quad core CPU

2/ Screen colors are bad

3/ WebCam quality

So, yes, I agree with you.

On 10/26/2019 at 10:31 PM, Onoakino said:

Replying here just to say wow. You guys are amazing modders! The screen mod and bios mod are way beyond my capacity to do, but I love seeing you guys succeed in pushing the limits of our 2570p. 

 

One question: 

I did a mod to enable the Bluetooth part of my wifi-bt combo card (soldering wifi slots' unpowered pins to the dock's usb pins. Does that mean no more WWAN modding for me because I already used the dock's usb pins?

 

Again, great job, guys! 

Yes it is really impressive, I was wishing for high quality mods as we can see on the Lenovo thinkpads

On 10/27/2019 at 9:51 AM, Andrew479 said:

Thanks for the tips. 

Low PWM has been a show stopper for me since I got 2570p many years ago, my eyes just couldn't bear it, and downgraded to 2560p for daily use.

Would it be possible to share step-by-step how to get 2000Hz PWM on a stock LTN125AT02 ?

I can live with 768p, but not with 300Hz flashing all the time. 

 

Thanks!

Are you sure it is the 2570p ? Me I don't like PWM but I never had problems with screen flicker with the 2570p 

The low quality screen according to the very low grade color calibration was the main issue, all the time I used the 2570p

Would be pretty interesting to have a 2k screen, because with the 2570p + 3820qm and the low-res 768p screen I often feel like the power is not fully used.

11 hours ago, invait53 said:

Yes, of course I can do RAID. The difference between mSATA and SATA is a formfactor only. That's why i did my mod. If I will use RAID I will still have the free caddy.

Yes but no, there is no need to have a free cady for the sake of having a free cady. First you gain only few grams if it is a weight problem so this is pointless. The only useful thing with the mSATA is either RAID0+1, for high resilience, but a laptop with high resilience if pointless,

or either having a 2TB hard drive and a high performance (800 to 1000 mb/s) RAID0 drive of SATA, this could be interesting. But you have still not told us about this question, is your drive in the WiFi slot or on the WWAN slot ?

If you have 16Gb RAM, I recommend you to download the very old and known software "PrimoCache" it is a software to increase the cache of the SSDs (or HDDs) in using free RAM on the machine, so I have "RAM-like" speeds when loading some files (8 Gb/s for sequential read see benchs below).

-----------------------------------------------------------------------
CrystalDiskMark 6.0.2 x64 (C) 2007-2018 hiyohiyo
                          Crystal Dew World : https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

   Sequential Read (Q= 32,T= 1) :  8450.388 MB/s
  Sequential Write (Q= 32,T= 1) :  6711.163 MB/s
  Random Read 4KiB (Q=  8,T= 8) :  1464.376 MB/s [ 357513.7 IOPS]
 Random Write 4KiB (Q=  8,T= 8) :  1273.470 MB/s [ 310905.8 IOPS]
  Random Read 4KiB (Q= 32,T= 1) :   412.207 MB/s [ 100636.5 IOPS]
 Random Write 4KiB (Q= 32,T= 1) :   471.074 MB/s [ 115008.3 IOPS]
  Random Read 4KiB (Q=  1,T= 1) :   444.689 MB/s [ 108566.7 IOPS]
 Random Write 4KiB (Q=  1,T= 1) :   413.750 MB/s [ 101013.2 IOPS]

  Test : 100 MiB [C: 60.9% (72.2/118.6 GiB)] (x1)  [Interval=5 sec]
  Date : 2019/09/27 20:25:04
    OS : Windows Server 2016  [10.0 Build 14393] (x64)
  

PS : I have a mSATA drive on a standard SATA adapter in my 2570p so I could do the same screenshot as you without the BIOS mod ^^

On 9/20/2019 at 2:12 PM, MioIV said:

mSATA expansion is interesting feature not because its something unusual but its offers additional storage space without need in replace main storage or use external storage with this notebook. Even if this technology is dead, **70p series that not much worse than modern businessbooks (except display) can be upgraded with this particular type of storage.  In addition, mSATA SSDs now popular primarily on classified market with affordable price, that OEM samsung drives is exceptionally tasty offers.
 

@Onoakino Sorry, but i don't have time for video records. When i'll get some free time I can make full image from F.34 dump if it's full, but if you guys is not ok with same serials then nvram still needs to be replaced.

 

@invait53 did you check disk SMART's for interface errors? I've got DMA errors and fallback to 3.0Gb-mode on much shorter cables in times when i don't have internal SATA adapter.

If the mSATA replaces the 3G card well this can be more interesting. But if it replaces the WiFi card, the problem with mSATA on the 2570p is that there is one port already occuped by this important WiFi card so not possible. Anyway, I really hardly see myself spending money on an mSATA because the last time I searched 6 months ago, as mSATA is a "niche" card, it was more expensive than a standard big sized SATA drive so I could have a big size SATA drive with more storage than buying a small SATA drive + mSATA. But, one question, can you do a software RAID with mSATA and SATA ? If it is the case, this can become pretty much interesting, but we have to bare in mind that the CD drive on the 2570p can be replaced to have a second SATA drive, so maybe we could do some RAID0+1 or somthing like this. Anyway, thank you for this very interesting mod that we have been waiting since years... =b

On 9/16/2019 at 2:22 AM, MioIV said:

Just done messing up with bios write protection.
 

PchBiosWriteProtect
BIOS lock
00 B2 FE 48 81 C1 DC => 00 B2 FF 48 81 C1 DC
SMI lock
00 B2 20 48 81 C1 DC => 00 B2 00 48 81 C1 DC
PchSpiRuntime
00 00 B2 FE B9 DC 80 => 00 00 B2 FF B9 DC 80

Checked on ther F.73 bios version.
Unfortunately, in F.73 bios FDO hotkey is banned - nb just turns off right after start, so additional flash descriptor region edit is needed.
Here is patched bios section binary for your needs. It contains: no WWAN/WLAN/Bluetooth whitelist, no SecureUpdating module, no CompuTrace modules, BIOS lock removed, no_ASPM_bit in FACP is reset. No NVRAM.

How to flash:

1. Get a full dump of your stock bios, make a backup
2. Extract the NVRAM section from it with UEFITool (BIOS Region => FFF12B8D-7696..., Extract as is)
3. In hex editor open the full dump and replace bios section, start address 0xB00000 ($LOGO string)
4. Replace the NVRAM section with yours in UEFITool (Replace as is)
5. Edit FDT at address 0x60

00 00 0B 0A 00 00 0D 0C 18 01 08 08 => 00 00 FF FF 00 00 FF FF 18 01 FF FF

And flash it with hardware programmer.

 

Possible issues: don't know why WIn8.1 boots too long, because of edited bios, shrinked MEI or just because it can.

 

As for mSATA, i'm not succeed at this time, maybe later. If someone want to try search where is satacontroller is initialized, here is the list with modules that different between 2570p and 8770w (don't checked bios versions though).

2570-8770 module diff list.zip

Pretty, I would like to help but don't know any thing about modding UEFI firmwares. Thus, I am not sure there is need to put efforts into enabling mSATA cards, this technology is pretty much dead. I will prefer invest bucks into a standard SATA drive that I can easily connect in another computer than a mSATA. Nevertheless, the no whitelist is very sweet and good. Thank you.

I recall that even with a 45W quad, the CPU is BIOS-power limited to something like 40W for the 45W quad (not 45W). Benchmark showed that the lask 5W is mainly for the integrated GPU in the 45W quad. So any 45W CPU will run at fullspeed if you don't use the GPU, and at least if the cooling system is OK (or the 2570p case is cold, I observed that the case slows down the CPU building temperature pretty much a lot).

I doubt that you have a CPU problem, this is very very rare, but it could happen. Same for the mobo, but it could be. I think it must be the battery

I have a 2570p with 45W quad and 65W charger, and *when the battery is fully charged* I can easily run any 3DMark or heavy Excel sheets, 100 Google Chrome tabs or video conversion. No problem. The laptop simply throttles but because of heat (100°C for the CPU in ThrottleStop). I don't know where you read that 45W quad and 65W makes the 2570p crash but this is bullshit. My laptop throttles only because of heat, not because of the charger. When it is "cold" for example after sleep then wake, the CPU runs at full multiplier until the temps reach 100°C.

On 8/7/2019 at 11:43 AM, AndyAndrei said:

Hello again. I played around with the bios and Windows settings and it looks like on battery if I limit the processor to 2 cores and 4 threads it works just fine. Also I think the crash on Windows 10 install was because of the 65w power adapter instead of 90w. I think on battery I will use only 2 cores and 4 threads which is fine. Also i think on battery it does that because of the 45w tdp.

Edit: It looks like the laptop battery cannot handle the 4 core 45w tdp cpus. I think if I had an i7 3632qm or 3612qm I wouldn't have this problem.

Yes it is either your laptops specific battery because I have a 45w CPU running fine on battery, but with degraded performance, this leads me to my second point :

Or either, it is because you try to run the CPU at full speed when on battery, because not any laptop of this grade of CPU even in 2019 will run at full speed (as if it is plugged in) without having sudden shutdown issues.

On 7/15/2019 at 10:29 PM, mikmaze said:

I guess you are right, I am happy with the performance of this little fkr, just beginning to wonder what would be the next lappy that replaces this one someday, how many cores will it have,  how many gigs of ram, how many gigs of storage, or will the next one be an all on one die solution...........

I have already thought about this. Well, the best of the best laptop, is Thinkpads, just read this article to know why :

http://www.cnmod.cn/2019/06/05/51nbs-x210-review-a-faithful-recreation/

Basically, the X201 of 2010 (or some year not to far) is so popular that chinese dude made an all new motherboard with an intel core i5/i7 8th gen (low power quad core versions). DDR4 and 32GB ram. 4k monitor compatible. Insane. I wonder if there is also a mod for i9 or i7 hexa core.

The CPUs are soldered, but those CPU mods it is pretty close to what we did with the 2560p/2570p mods.

On 6/27/2019 at 11:10 PM, mikmaze said:

updated to bios version 73 last night, all good so far, not sure what it changes or "fixes" but its all good to me.

Only security update

ENHANCEMENTS:
- Enhancement to address security vulnerabilities CVE-2018-12126, CVE-2018-12127, CVE-2018-12130.

In 2019, I am pretty sure you can lost hope that HP add any new feature to the 2570p, we are even happy that they still update the BIOS for security... The advantage in having a entreprise grade laptop.

I would like to upgrade from a 3820qm to a 3940xm. Who can do a throttlestop or hyperpi benchmark so I can compare how much few % I will gain ?

It will NOT be a lot but I plan to upgrade the cooling system with a water pack. I simply want to have the best configuration for the 2570p, with no commenting.

Commpletly IMPRESSIVE. I am curious to know how you did.

My biggest problem with the 2560p tho was not the screen res, because I could plug it on 2 external displays. It was the so dull/ugly color screen, but this mod will fix the 2 problems in one shot.

On 1/11/2019 at 6:56 AM, Onoakino said:

Just putting this ThrottleStop result here for comparison purposes.

 

i7 3612QM

16GB Samsung RAM in dual-channel mode

500GB Samsung 860 EVO SSD

Windows 10

Yes your results are good, according to the benchmarks posted ealier.

Your CPU is maxing out at about 90°C, this is close to mine with 95+ °C, knowing that my CPU 3820QM is supposed to be hotter 45W TPD and yours 35W TDP.

For the 3840QM, I still wonder how he maxes out at 90°C. We must also consider that some CPUs are more efficient than other, although on mobile CPUs and Xeon Servers CPUs this is not supposed to be as different

Anyway, there is one visible thing, is that we can see the difference in performance up to a 3840qm on the 2570p, so if someone have the money he can buy a 3840qm and gain few seconds (few percents) in his tasks. I am not very sure that the price difference will justify the performance gain, so it is best to get the CPUs at the lowest price possible.