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E7400 high temps under water!

post #1 of 3
Thread Starter 
I've been doing some tweaking to try and get this stable at 4.2ghz/400FSB. I started tweaking at 3.9ghz/380FSB where there were no stability issues keeping most BIOS settings at Auto. The first thing I did was change the CPU clock skew -200ps and that helped numbers, bumping it up to 4.2ghz I started dialing in more settings manually: VTT @ 1.28, GTL @ 0.65x (the max value allowed).

That booted fine so I ran linpack and there were errors trying to run 6000 problems. I then set NB to 1.4 and ran linpack again at 6000 problems again with Asus Probe open to check out NB temps. Then the CPU hit the 80s.

I started coretemp to confirm it wasn't just an anomaly and sure enough by the time 6000 problems finished (error free) CPU temps had hit a max of 83. It doesn't seem like there's anything I can do against that since I'm already running a dedicated CPU cooling loop and the temps spiked after being at 60 and before returning to 60.

To add insult to injury, I seem to get 2GFLOPS less @ 4.2 than I did at 3.9. Since I'm fairly new to advanced OC tweaking, I'm not keen on running any more stress tests until I can figure out where I went wrong, how to fix it, and how to gain back the GFLOPS that seem to now be going into heating the CPU! Advice would be greatly appreciated

edit: forgot to mention, vcore @ 1.43
Edited by Petrol - 5/29/11 at 10:47am
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post #2 of 3
Did memory speed also increase or did you have to drop a multiplier? Linx gflops for me depend a lot on problem size and memory speed. Personally I don't really trust it too much and instead use other benchmarks based on the tools I use.
     
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i7-3930k @ 4.?GHz Rampage IV Extreme 2x 8800GT 32GB Dominator GT 2133 CL9 
Hard DriveCoolingOSMonitor
2xX25-E Raid 0, 1xC300 128GB, + Mechanicals DT 5Noz, EK full cover GPU blocks, EK full cove... RHEL 5.5 WS Dell U3011 + 2005WFP Portrait 
PowerCaseMouse
AX1200 CaseLabs TX10-D + Pedestal Razer DeathAdder 
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Crucial M4 DT 5Noz, Koolance Full Cover GPU blocks, EK ful... Win 7 64 bit Pro Dell U3011 + 2005WFP 
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post #3 of 3
Thread Starter 
multi remained 10.5x throughout, memory speed I was keeping at 800mhz to get 1:1 FSB:RAM. It wasn't just in LinX that performance dropped but also in SuperPi. to 1 mill it took 13s+ at 4.2ghz and it's in the 12s range from 3.9-4.1ghz. I should have thought more before titling this thread because it's not so much the temp spike that bothers me as the fact that I can't get close to 400FSB without unexpected failure
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