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Overclock Help: EVGA P55 SLI (E665 rev A74) and Lynnfield i7 870

post #1 of 8
Thread Starter 
Hi everyone,
I never thought about asking for help to try to OC my little rig but after reading some bits of info and pondering about the potencial of my system, i tought i would give it a try and ask you guys some help.

My goal is not extreme OC with water cooling etc. I would just like you guys to help me out to OC it to a point where my stock cpu/mobo fans still hold it tight and secure biggrin.gif.

My specs:

Processor: lynnfield i7 870
Mobo: EVGA p55 SLI (e655 Rev A74) Latest Bios
Memory: Kingston (KHX1600C9D3B1K2/8GX) http://www.kingston.com/datasheets/KHX1600C9D3B1K2_8GX.pdf
PSU: Cooler Master RS-500-PSAP-J3
GFX Card: Palit GTX 560 SE



Current Status:
Everything is on stock settings on the bios (will post pictures if needed) with turbo mode enabled.


Now, What do you advise me to do to try to start to overclock it? Even before that, is it possible to overclock it to get better performance then the dummy OC and/or the turbo mode enabled on the bios?

I have read walkthroughs, guides, info on how to overclock the i7 lynnfield but i am afraid to do it on my own and screw up.

I would like to know if it's possible to OC changing everything a bit: from Bclock to Memory timmings etc.

All thoughs, tips, info and guidance welcome.






I know my bios is reporting a 3.2GHz CPU speed because Turbo mode Tech. is enabled, otherwise it would state the native 2.93GHz of the cpu with no unlocked multipliers.



TIA
Edited by Featherbeans - 2/2/13 at 9:45am
post #2 of 8
Thread Starter 
(sorry for the bump) Any thoughts on where to start to try to OC it?

Will post the results of the suggestions with pics and benchmarks as we go.

Thank you in advance.
post #3 of 8
Thread Starter 
Should i repost this on another subforum?

Really need some help to start.

Thx
post #4 of 8
If i remember lynnfield correctly you have an unlocked multiplier and a baseclock, Not sure about the multiplier, Start by Lowering your ram divider and raising your baseclock slowly.
MEGATRON
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MEGATRON
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post #5 of 8
Thread Starter 
Well, i have turned off CE1, c state tech and Spedstep (including turbo) put the ram divider the ram divider at 2:6. Whatever i choose as baseclock from 133 (default) up will produce temperatures near 90 Celsius on occt ( any of the tests) running for 10 minutes.
The board has the voltage settings on Auto and i noticed the Vcore goes up until 1.23.
post #6 of 8
Thread Starter 
Well, good news and bad news. The bad ones first: i got nothing trying to OC my system with the stock cooler.

Good news: i bought a corsair H100i cooler. biggrin.gif

Will fiddle with the voltages in the next days. But 1st i have to find a sweet radiator mount solution cause i had to improvise with my old Zalman z11 tongue.gif/

Let's fry some eggs with occt and intel burn and all that stuff biggrin.gif


Feather out
post #7 of 8
Thread Starter 
With the new cooling system installed, i lowered the version of my evga p55 sli board back to the A72 version (had A74 previously), set the bclock up to 166 from 133 and the dimm voltage i had to set it at 1.5V with JEDEC 4 Specs 9 9 9 25. Disabled Intel Speed step and the c state tech, and manually set the CPU vtt to 1.25 after some testing (the bios was setting it up to 1,38 volts). Ran a couple of hours of intel burn, occt (linpack) and prime 95. All seems stable. CPU temp never above 50 degrees celsius. TOmorrow i'll be memory testing.
3.6GHz from my old i7 870 2.93GHz.
I'm a proud noob!


But my 1st doubt is: i serched the intel database for the i7 870 specs and it says the cpu does not support the xmp specs at 1666 that my kingston hyper X have. Could i arm the cpu if i set up memory at 1666 xmp even if my mobo and memory allow it?


My system bios settings are the ones in the pictures with the only settings adjusted differently beying the ones mentioned in this post. Do you guys have any suggestions on where i might improve?

TIA

Featherbeans
Edited by Featherbeans - 2/8/13 at 6:35pm
post #8 of 8
I would manually set the ram to its normal specs and run voltage at 1.6 - 1.65v. Try to push for 4.0ghz with this setting 1.35v on CPU Vcore and VTT and back down a bit to find a better and lower stable voltages. I run my ram at 2:8 for 1600MHz @ 4ghz. I had really bad experience with trying to run XMP setting on the ram to where my systen wouldn't boot up until I did the cmos reset. Just manually configure the ram and you'll be fine.
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ASUS G750JW
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Intel® Core™ i7-4700HQ Mobile Intel® HM87 NVIDIA® GeForce® GTX 765M with 2GB GDDR5 VRAM 8GB DDR3 1600MHz  
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Crucial MX100 256GB SSD 1TB hard drive (5400 rpm) Multiformat DVD±RW/CD-RW drive Stock Cooling 
OSMonitorKeyboardPower
Windows 8.1 17.3” anti-glare FHD LED backlit (1920 x 1080) Onboard 41.0cm x 31.8cm x 1.7-5.0cm, 4.5Kg (8-cell batt... 
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