planetburns

While you are setting a > 33 multipler if you look on the left hand pane in Throttlestop it will report the actually multiplier the CPU is using. Based on your above result you are seeing either Thermal or TDP throttling at the x32 -> x33 increment. Notice that the temps and voltages after that remain the same as what it was for x32.

This is why I make a point of being selective about which i7-quad to upgrade to. You'll find that your i7-4810MQ costs considerably more than the i7-4700MQ I'm using now. Yet if we did 4-core performance comparison mine may very well perform better given it's reporting a 37.4W TDP @x33, rather than the x32 you are seeing. Yours may well be able to do the same with a higher negative offset. You'll need to test as each CPU has unique properties.

Thank you for the 40.5W comment.I too have seen values just on the edge of 40W with my latest testing. However, nothing anywhere near the 46.5W I saw during my tests several months ago. That ~7W difference would be good for another 200-300Mhz top end performance if the cooling system could dissipate the heat fast enough.

So, should I try -85mV next and run the same tests again (and go up in small increments) and see if I get a better score?

Really bizarre that the 7W difference has just gone!

Thanks

James

Tried going to -70mV and couldn't get past a multiplier of 33 without a BSOD.

Hi Tech Inferno Fan

Here's my test results running TS Bench 1024M to 20%...

Multiplier 28 30 32 33 34 35 36

Max Temp 78 86 90 88 88 88 88

VID 0.8317 0.8894 0.9470 0.9578 0.9470 0.9470 0.9470

Watt 27.3 32.0 37.5 40.5 37.8 37.7 37.8

Core Voltage was default and the Offset Voltage was -80.0781mV

I've set the Multiplier to 32 now and things seem stable - idle temp is 42-47 degrees.

What do you think I should do next, reduce the voltage to -70mV and repeat?

Cheers

James

- - - Updated - - -

PS I was able to get over 40W with a Multiplier of 33 (VID was 0.9578) at 40.5W (max 90 degrees).

Throttlestop 7 should be used for Haswell CPU support. The variables you can tweak to lower temps are the voltage offset in the TRL window and lowering the multiplier in the main window.

A -130mV voltage offset is large and may be the reason for instability. Try -80mV and work up if you find it's stable. The higher the stable offset you can use, the higher you can set the multiplier. Apply a 4-core CPU benchmark like TS-bench to see well the system dissipates heat when under load and appropriately increase or decrease the highest multi.

My latest TS-bench VID vs TDP results are iat http://forum.techinferno.com/throttlestop-realtemp-discussion/7548-help-dell-e6440-previously-tdp-throttled-i7-4700mq-~47w-now-40w-why.html#post103638 .

In the case of your i7-4810QM, you can click TRL, select overclock and ramp up the 4-core multi up to x36 . However, TDP (47W) and cooling limits will see you too likely limited to ~x30 under 4-core CPU load. That is unless you have a very efficient CPU and the dGPU heatsink/fan, which may see you be able to soar higher. You can either control the max multi in Throttlestop to set your own comfortable temps or leave it unchecked and let the Intel turbo boost algorithm do it. What happens there is once the CPU hits near 90 degrees, it will throttle back the multiplier automatically in order to salvage the CPU, keeping temps below 97 degrees.

FYI: while my results look pretty good, the temps are not so good. The upper end of the tests can only see the CPU run for a short time before it gets temperature throttled. I would need the dGPU heatsink and perhaps some fan control software to improve it substantially.

Thanks Tech Inferno Fan - I'll go back to Throttlestop 7, I've also gone back to the A02 bios too (and not installed the ME FW yet).

I'll try with -80mV first as you suggest but what should the core voltage be set to?

I'll then run some tests myself and let you know how I get on.

Cheers

James

I've gone back to ThrottleStop 6 as 7 seems to unstable - maybe it's just me, I don;t seem t be having a lot of luck!

Please can you advise where I can set the offset to -130mV - I can't see that option under TRL (it doesn't let me enter a negative value) and also what the Set Multiplier should be set to. I've set it at 20 and things seems to be relatively stable but that's without the offset. :-)

Just as a detour, can you advise what BIOS version you have on your system? I ask because somewhere between having A.02 and A.07 bios on my E6440, I've lost what appears to be ~7W TDP headroom (39W versus 46W) with my i7-quad CPU. Now the A.02->A.07 bios upgrade sees a Intel ME firmware update as well. When rolling back from A.07->A.02, the ME firmware component is not downgraded. I

I'm wondering then if the A.02 to A.07 upgrade is not such a good idea if wanting best i7-quad performance??

To help answer this, would you mind running Throttlestop, selecting TS-bench, hitting 1024M and observing the TDP value reported next to VID? I'm curious what's the highest number that you during the initial run, for say the first 10-20s. That is. whether you are seeing < 40W or > 40W. If > 40W then how great?

If you wanted to take it a step further you could assemble the table like I did previously at http://forum.techinferno.com/throttlestop-realtemp-discussion/6958-haswell-step-backwards-ivy-bridge-i-have-some-shocking-tdp-results.html#post95181 .

Going through that process would give you a first hand example of how to lower temps using Throttlestop; answering your question.

OK, so tried a re-install of Windows on a different hard disk and am still getting some BSOD's. Checking the memory at the moment and there doesn't seem to be any issues (thought it was worth a shot).

The option for Processor Power Management is back with the re-install, but if it's set anything higher than 95% then I can't be in Windows more than a minute or two without a BSOD. I'm using ThrottleStop 7b and have worked out how to change and set the offset to -130mV and with this setting I've managed to have the machine on for a good few hours without a BSOD - progress at last. Also, managed to get ThrottleStop to start with Windows too.

So, all I need to do (!) is work out the best setting for ThrotteStop and then I'm good. Should I be setting the TPD multiplier to a default value on the main ThrottleStop page (e.g. 32, 33, 34, 35 or 36) or just leave it unset, that's really the only question I have now?

Thanks in advance.

Just as a detour, can you advise what BIOS version you have on your system? I ask because somewhere between having A.02 and A.07 bios on my E6440, I've lost what appears to be ~7W TDP headroom (39W versus 46W) with my i7-quad CPU. Now the A.02->A.07 bios upgrade sees a Intel ME firmware update as well. When rolling back from A.07->A.02, the ME firmware component is not downgraded. I

I'm wondering then if the A.02 to A.07 upgrade is not such a good idea if wanting best i7-quad performance??

To help answer this, would you mind running Throttlestop, selecting TS-bench, hitting 1024M and observing the TDP value reported next to VID? I'm curious what's the highest number that you during the initial run, for say the first 10-20s. That is. whether you are seeing < 40W or > 40W. If > 40W then how great?

If you wanted to take it a step further you could assemble the table like I did previously at http://forum.techinferno.com/throttlestop-realtemp-discussion/6958-haswell-step-backwards-ivy-bridge-i-have-some-shocking-tdp-results.html#post95181 .

Going through that process would give you a first hand example of how to lower temps using Throttlestop; answering your question.

Also, how do you apply the -130mV offset, just by setting the Multiplier lower?

After I answered your questions above I did the 1024M up to 15%...

Multiplier

27 0.9711 35.8

28 0.9633 36.1

29 0.9637 36.1

30 Failed with BSOD at around 5% - eek!

Currently running at multiplier of 25, 0.8845 with a temp of 6-8W (running around 41 - 48 degrees across all 8 cores).

Just as a detour, can you advise what BIOS version you have on your system? I ask because somewhere between having A.02 and A.07 bios on my E6440, I've lost what appears to be ~7W TDP headroom (39W versus 46W) with my i7-quad CPU. Now the A.02->A.07 bios upgrade sees a Intel ME firmware update as well. When rolling back from A.07->A.02, the ME firmware component is not downgraded. I

I'm wondering then if the A.02 to A.07 upgrade is not such a good idea if wanting best i7-quad performance??

To help answer this, would you mind running Throttlestop, selecting TS-bench, hitting 1024M and observing the TDP value reported next to VID? I'm curious what's the highest number that you during the initial run, for say the first 10-20s. That is. whether you are seeing < 40W or > 40W. If > 40W then how great?

If you wanted to take it a step further you could assemble the table like I did previously at http://forum.techinferno.com/throttlestop-realtemp-discussion/6958-haswell-step-backwards-ivy-bridge-i-have-some-shocking-tdp-results.html#post95181 .

Going through that process would give you a first hand example of how to lower temps using Throttlestop; answering your question.

OK... BIOS is A.07, how do you go about the downgrade if needed; just run the EXE? I'll use your guidance if this will be better for performance.

Running the test as suggested I get a highest value of 36.5W - so that's <40W, the VID value was just under and the highest temp was 83.

How do you get Throttlestop to start with the OS - tried a few things and not been able to achieve that and I don't really want to have to start it manually each time :-)

What sort of temperature does your system run at?

Thanks

Well the upgrade went well although I'm getting a few BSOD which could be hard disk related and I've done some repairs on that.

The option to change the Processor Power Management -> Maximum to 99% in the Power profile is no longer available so I can't seem to do that :-(

Please can you explain exactly what settings in Throttlestop I should be changing - exact instructions if poss?!? Also, how get I get Throttlestop to start at Windows start up. I've tried creating a shortcut in the correct directory but it's not picked up or started.

So nearly there... thanks for all your help.

The 47W i7-quads have 10W higher max TDP than the factory specced dual-core 37W i5/i7. So if did install a 47W i7-quad, how would you decrease CPU consumption by 10W or more?

Based on http://forum.techinferno.com/throttlestop-realtemp-discussion/6958-haswell-step-backwards-ivy-bridge-i-have-some-shocking-tdp-results.html there are two ways:

1. Disable the turbo mode using Windows Power Profile -> Processor Power Management, set Max CPU=99% .

That will set the max CPU multiplier as:

i7-4700MQ 3.4 -> 2.4Ghz

i7-4800MQ 3.7 -> 2.7Ghz

Based on above link we can estimate a x10 decrease in multiplier will decrease TDP by nearly 20W.

2. The other way is to use Throttlestop or XTU to apply a negative offset, undervolting the CPU. The aggressive -130mV offset applied in above link saw the maximum turbo multiplier's TDP decrease by just over 10W.

Tuning the system by modifying both the above parameters would see a convergence point yielding highest performance at 37W TDP. The other alternative would be to just get a 37W i7-quad CPU like a i7-4702MQ or i7-4712MQ. The drawback there is less tuning capabilities. Keeping in mind that if you do not engage the dGPU then the 47W TDP i7-quad CPUs have additional TDP headroom to run higher multipliers.

Thanks - do I need to do both 1 and 2 from above or can I just do 1? What do you recommend? I have the i7-4810MQ in hand, as well as the additional memory and some decent thermal paste so I'm ready to go!

Final question - if I take my existing hard drive out of my E6430 (once fully backed up) and put it into the new machine will it boot (Windows 8.1)? I appreciate I may need to reactivate some stuff.

Cheers

James

Thanks so much - it's really appreciated. If I just set the Processor Power Management to 99% will that be enough?

I'm going to buy some decent CPU thermal paste which will probably help a bit. I'm a developer and also use the Adobe apps so I just want to get the most out of the machine that I can.

Currently I have a E6430 with a i7-3740MQ, dedicated graphics, 16GB memory and Samsung 840 Pro 512GB SSD. I needed to buy a new machine for my son and the E6440 with 8GB, 180GB SSD, i5-4300M and dedicated graphics new was only $850 (£512). I'm happy to but new memory and processor and let my son have the E6430 and I'll take the E6440 which has better graphics and WWLAN (we'll just swap the SSD's).

Can somebody help/advise if a i7-4810MQ will work in the E6440 with dedicated graphics (the 4810MQ is cheaper than the 4800MQ at the moment).

TIA

James

Can somebody help/advise if a i7-4810MQ will work in the E6440 with dedicated graphics (the 4810MQ is cheaper than the 4800MQ at the moment).

TIA

James