2600k stable @5ghz at last!

ferr250 · 31 Jan 2011 at 19:49

Eventually i've managed to get my 2600k stable @ 5ghz, this will be my 24/7 settings. Whats bugging me is that i've had to reduce my memory frequency to 1866, it will run fine with 2133 @4.9ghz but whatever i try 2133 is no go. Settings i needed to adjust on my UD7 are:
multiplyer 50x
BCLK 1002
CPU PLL overvoltage enabled
Vcore 1.425 (this raises to 1.476 under high stress)
QPI/VTT 1.1
Memory voltage 1.54

To test stability i did a prime blend run of 4 hours to start, i then did all my graphic benchmarks a few times, played COD Black ops for 3 hours, then left her running prime blend all night. It ran just over 12 hours before i switched off, i was that surprised to see no BSOD this morning that i forgot to take a screenshot. I'll try again tonight and post. Max temp reached last night was 82c (custom water) but she gets nowhere near this when gaming etc. My question is which ram slots are people here using on the UD7? A couple of guys on other forums have swapped to slots 2&4 with good results. Raising the vtt causes instability and extra voltage for the memory is not helping. Any thoughts?

cmsbfent · 31 Jan 2011 at 20:28

Nice

These voltage readings are confusing me though. I'm prime stable at 4.7ghz (22 hours and counting, gotta reach the magical 24hrs) and thats with a bios setting of 1.485v on the CPU. Looking at cpuid, under load the voltage sits at 1.440

So my load voltage is lower than the bios setting, where as yours is higher. For reference, my max temp for this run is 71 degrees, also on custom water

Scon · 31 Jan 2011 at 20:32

You guys know the it's HIGHLY recommended to stay under 1.38v yeah?

ferr250 · 31 Jan 2011 at 21:35

Thanks

Strange with your voltage, these boards can obviously increase vcore as required (i'm using level2), perhaps they also work the other way. Can you not reduce your vcore in bios? 1.36 got me stable @4.8.

1Day · 31 Jan 2011 at 21:38

Very nice going ferr250 you have a pretty good chip if you are able to run stable 5GHz 1.425.

Re - memory. 2 and 4 are a option but it really does sound like IMC issue and not really much you can do with that. The internal controller is fine under a certain speed. But once the core gets beyond a threshold it is no longer able to sync with the memory and has a little moment. BSOD type moments normally.

Not much else I can offer.

Oh use LLC 1 rather than 2.

ferr250 · 31 Jan 2011 at 21:40

burrell said:
You guys know the it's HIGHLY recommended to stay under 1.38v yeah?

It's also Highly recommended not to exceed the speed limit, but hey we dont all follow that either

Seriously though, there are several very knowledgable guys on other forums saying 1.45 is o.k for 24/7 with temps around 80c. I guess no one knows at the moment. But i'm leaving mine here and i'll let you know when the cpu grim reaper comes calling!

ferr250 · 31 Jan 2011 at 21:48

Thanks again 1day, switching to LLC1 now, obviously no questions asked after the monsterous overclock you posted earlier, superb! Keep up the good work, everytime i revisit that thread, i can't help but chuckle. Who'd have believed it a few months ago.

1Day · 1 Feb 2011 at 10:13

LLC2 is just pushing to many volts through under load. And unless you are trying to break the world record at 32Mil super PI or pass Vantage there is just no need I guess.

And they call us reckless

Go figure.