Hey guys, thanks for all the great advice. I particularly appreciate the stickied how to guides.
 
I first built my current desktop several years ago. I OC'd it at the time up to 3.8, plus the turbo option. I've been dissatisfied with my case and its airflow for awhile, so I bought a new one and ported everything over today. (Funnily enough, I switched from a $200 Coolermaster Cosmos to a $60 Coolermaster HAF and I'm much happier.) When I did, I flashed the BIOS. I know, I know--  you should only flash the bios if you're having problems. Anyway, I've been following the guides again and getting an OC of about 4.0, what I was looking for. I ran it through a 3DMark benchmark, ran fine. I played Battlefield 3 for awhile with FRAPS, looked great. So I got down to business to stress test with Prime95. I opened CoreTemp to keep an eye on things. To my surprise, the 4.0 or so that E-LEET reported to me was down to like a 3.4. Then it dipped to about a 3.0. Then it moved around some more. I double checked with E-LEET and CPU-Z, same deal. In general my core speed and multiplier seem to be constantly changing. What gives? I'd forgotten most of what I learned about OCing this chip until I looked up guides again today, but I don't remember anything like this. Is it the QPI? That number seems to constantly change in E-LEET.
 
I've got a Core i7 920 2.67 stock chip on the X58 SLI (not classified) board. I've got 3x2 sticks of Corsair 1333 RAM, which I'm underclocking as shown. I tweaked the voltages as you can see below. Any help would be appreciated. Apologies if this is a dumb question.
 

misfitofscience


Hey guys, thanks for all the great advice. I particularly appreciate the stickied how to guides.

I first built my current desktop several years ago. I OC'd it at the time up to 3.8, plus the turbo option. I've been dissatisfied with my case and its airflow for awhile, so I bought a new one and ported everything over today. (Funnily enough, I switched from a $200 Coolermaster Cosmos to a $60 Coolermaster HAF and I'm much happier.) When I did, I flashed the BIOS. I know, I know--  you should only flash the bios if you're having problems. Anyway, I've been following the guides again and getting an OC of about 4.0, what I was looking for. I ran it through a 3DMark benchmark, ran fine. I played Battlefield 3 for awhile with FRAPS, looked great. So I got down to business to stress test with Prime95. I opened CoreTemp to keep an eye on things. To my surprise, the 4.0 or so that E-LEET reported to me was down to like a 3.4. Then it dipped to about a 3.0. Then it moved around some more. I double checked with E-LEET and CPU-Z, same deal. In general my core speed and multiplier seem to be constantly changing. What gives? I'd forgotten most of what I learned about OCing this chip until I looked up guides again today, but I don't remember anything like this. Is it the QPI? That number seems to constantly change in E-LEET.

I've got a Core i7 920 2.67 stock chip on the X58 SLI (not classified) board. I've got 3x2 sticks of Corsair 1333 RAM, which I'm underclocking as shown. I tweaked the voltages as you can see below. Any help would be appreciated. Apologies if this is a dumb question.

Did you disable speed step and C1E in the BIOS?

And also in the OS (speaking from Windows 7).
 
Those temps...is that taken while running Prime95? If not. Then your CPU may be downclocking to save itself*.

*I say this because if it's not then that means his idle temp is 10C above mine, and with Prime95..it's stable at 80C after running a 10min Test using RealTemp
 
 

Nope, Speed Step is disabled. It's really weird. The QPI thing on E-LEET is constantly changing.
 
Also, yeah, sorry, I had just run Prime95 when I took those screen caps.

This is downright weird... it's definitely the multiplier that keeps changing, even after a Load Defaults. It just downclocked itself to 1.5, checked on CoreTemp and on Cpu-Z... and that was at idle.

I had an issue similar to this, I don't know if my CPU down clocked that much, I only noticed it because all of a sudden my system couldn't even handle Dead Space 2 and I was getting no more than 20 FPS.  I ended up bumping my VCore down one option and that completely stabilized my system.

Ya, his Core Volt is a bit high (@1.388V), mines at 1.294V - 1.305V...but it's only running at 3770MHz.
 
You may just not have a chip that can do 4GHz, try downing it to:
VCore: 1.3V
VCore Boost 1: 0.0V
Vcore Boost 2: 0.0V
IOH/ICH Volt: 1.525V
ICH Vcore: 1.125V
QPI PLL VCore: 1.1V
IOH PLL Vcore: 1.8V
CPU PLL Vcore: 1.8V
IOH VCore: 1.125V
CPU VTT Volt: 1.325
DRAM Volt: 1.65V
*NOTE: Some of these aren't listed in your screen shot of E-LEET's Voltages, so use these at own risk, but most of them seem to be below your numbers.
 
 
Mult: 21
Bus: 179.5
QPI: 3232MHz

Hey guys, after a full morning of work, I've got a stable OC at 3.8/4.0 turbo, with temps at load around 80 degrees. I did a full stepwise trial and error approach with my voltages. I've got that going with a VCore at 1.35. Still not sure why the core speed was changing so much even after a factory reset, but I played Battlefield 3 without issue and I'm running Prime95 now.
 
Thanks for the help.