nich666

On ‎12‎/‎21‎/‎2013 at 6:51 PM, Tech Inferno Fan said:

INFO: How to choose the most efficient 45W i7-quad

Summary: recommend a i7-3720QM or i7-3740QM/i7-3820QM as best value CPU upgrades with at most 9% performance variation between the three. The i7-37xxQM or i7-38xxQM being more power efficient, if battery life is important than the i7-36xxQM CPUs.

@bjorm, I recently tested three i7-3740QM CPUs, all SR0UV spec. Notebookcheck says these have up to x35 4-core mode here. Results below for them. I skipped from x13 to x22, starting at x23 to see the ramp up to the the highest non-turbo freq (x27) of the lowest end 45W i7-quad (i7-3610QM).

Comparing the best (#1) and worst (#3) we find there is quite a difference between them. The more efficient one runs x12 at 0.1051V lower, can run x34 even engaging x35 for some time (2mins with bottom cover off) until presumably thermal limits start seeing it pull back the multiplier. It runs x34 at 0.04V and 3.6W TDP lower than the worst one's x33 multiplier. It's x34 mode using the same power as if the the worst was running at x31.5!! The worse one will not run at x35 let alone x34.

Hi, I've just joined after getting into what seems like a vat of molasses.

Looking for a travelling laptop, small size and cheap in case it is stolen, I settled on a battered (Big dent in lid but working fine), HP 2540p for£65 off eBay.

All went well until I found this forum telling me I had bought the wrong one for fiddling, [upgrades].

I love fiddling so looking again I came up trumps [no USA puns here], there is a German firm selling brand new still in HP boxes 2570p's for just €270 (£217) but with a German keyboard.

A new UK keyboard from China (I suspect), was an extra £24 although fitting it was a trial of patience involving a very stiff upper lip. 

I found prising off the frame between the keys without bending it extremely taxing. My best solution was to use a lolly stick twisting it gently did the trick.

Next time I pay more complete with a frame and keep my hair.

I followed the recommendations on here gluing copper to the heat sink, whacking in giant Ripsaw (idiot name) RAM and an Intel WiFi card so I now connect to 5G even in deepest France. 

I have a 1Tb Hybrid SSD drive cloned with WIN7 32bit OS as supplied on the original HP drive.

Upgraded to WIN10.

Incidentally, if you download WIN10, burn a DVD it will still activate using the WIN7 CoA! 

This is when I seemed to be wading into the molasses. 

This is where it got me really bogged down.

I bought a CPU Prozessor QuadCore Intel Core i7-3740QM 8x 2,7 GHz Socket FCPGA988 also from Germany.

It won't fire up past an initial HDD lights on and a blinking cursor.

Shikyo (must be careful with the name), is asking if this processor is compatible.

So am I.

I am very careful with handling processors so all the pins are erect and in line, due no doubt, to all the oysters I eat.   

I now wonder if the processor needs the OS to be 64bit to recognise the BIOS; I have updated the BIOS but to no avail.

My problem was the computer refusing to allow WIN10 64bit and using the advice on line doesn't work for me.

Either the Upgrade or OS says the computer isn't compatible although CPU-Z shows all the boxes are ticked and it is good to go.

This machine is dancing along quite nicely on the i5 but now an expensive i7 chip seems to have activated article 50 prematurely.  

Computer says no.

ANY advice out there to help would be appreciated. Regards, Brian.