Wishmaker

I have the system in my sig. My Gigabyte UD3R REV 1.6 MOBO is not the best but it can hold its own. I can overclock with ease my I7 to 4.0 GHz but anything above that requires serious tweaking. I want to reach the 25000 mark in Vantage and I need to bench at around 4.4-4.6 GHz for that. My problem arises here. I cannot make my CPU LINX stable above 4.1 GHz. I managed to boot at 4.2 GHz but LINX died .

I got 1333 MHz memory and this does not seem to be a problem. I put the XMP @ 1.65 for CL7 aggressive timings. Set the ratio to 6.0 to be well within the safety margin. I move next onto the QPI ratio which I set to x36, the uncore part which I set to x16, x15. I set the clock above 205 and take turbo boost and HT off. LLC on and I go for voltage.


My successfull 4.1 GHz overclock ran with 1.4 on CPU and 1.3x on QPI. What did I miss to make this thing clock higher? Do I need to tweak on the voltage section or I need to change some of the other settings?


Any help would be highly appreciated. I've had so many lock-ups, my screwdriver is always at my side to reset the board .



Cheers,

Wish ...

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FtW 420

Could be it just wants more vcore, with my 920 d0 I can do 200 x 21 @ 1.275 in bios on my ud5, over 200 bclk it starts eating lots of V. for 210 x 21 I have to jump up to 1.393 in bios. To run vantage @ 220 x 21 with HT I feed it close to 1.5.
Your cpu probably scales differently on voltage, if it needs 1.4 for 4.1 ghz it may just need more to do more, be careful with temps.
As far as QPI , with 6 gigs ram I leave it at 1.24 - 1.26 for 4.2 Ghz, I up to 1.3 around 4.5 Ghz, so you may be able to get away with less.
On classifed mobos a few people have found lowering the cpu pll between 1.3 - 1.8 seems to make it more stable with less voltage, I haven't played with it but if it might help...
Also people have reported changing their clock skews have increased stability. Again, something I haven't tried myself.
Good luck.

havox

Try not running a XMP Profile set the settings manually. I havent been able to get past 4 personally but thats because I've never tried Just try increasing your vcore thats about your only option. I was able to get 24k at 4.0 at 195*21 with turbo mode and HT on my D0