x79-ud5 f13i bios

[kostas75#]

hello to everyone i have x79-ud5 motherboard with i7 3930k cpu,i have just update bios from official gigabyte site to f13i,it is for vdrop improvment,i run prime95 for about 10 minutes and i find out that there is no vdrop with 100% cpu usage!!!!! and i think that this is very dangerous because loadline calibration now is turned 100% on,please help me understand,where i am wrong???

thanks

[kostas75#]

Re: x79-ud5 f13i bios

i can say that the good thing of that update is that before ,to achieve stability under load i had to put vcore at 1,40v (bios) and now that there is no vdrop, vcore is at 1,32v (bios setting) and i have a stable system checked with prime for 1 hour!!!
but i am still worrying for spikes during the transition from 100% to 0% load. i think thats the reason to exist vdrop,To prevent this phenomenon.

[kostas75#]

Re: x79-ud5 f13i bios

over the weekend i checked vcore with oscilloscope and i find a very stable vcore with no spikes,i think this bios update really works great,i run i7 3030k at 4,3ghz with 80mv lower and i have a stable system running prime for 5 hours now!!

[Amurtigress]

Re: x79-ud5 f13i bios

Hello,

good to have someone with an oscilloscope. I found that F13i and F13k are helping me too. In my case it reduced the voltage for my 3820 from 1.375 to 1.34 at 4375 MHz (125x35) to get stable. However...Prime 95 is NOT a good testing tool for this platform. I found you really have to stress AVX commands to see if it's stable. You better grab a copy of OCCT and run the test in 64-bit OCCT mode and on all threads. I had it that PRime and IBT were stable with much less voltage than OCCT, and while the others were stable, OCCT would crap out within seconds or minutes.

[kostas75#]

Re: x79-ud5 f13i bios

Hello,

good to have someone with an oscilloscope. I found that F13i and F13k are helping me too. In my case it reduced the voltage for my 3820 from 1.375 to 1.34 at 4375 MHz (125x35) to get stable. However...Prime 95 is NOT a good testing tool for this platform. I found you really have to stress AVX commands to see if it's stable. You better grab a copy of OCCT and run the test in 64-bit OCCT mode and on all threads. I had it that PRime and IBT were stable with much less voltage than OCCT, and while the others were stable, OCCT would crap out within seconds or minutes.

yes you are right when i started occt after 2 minutes i had a BSOD so i raised VCORE from 1,32 to 1,335 to achive stability,now i think after 1 hour occt running that i am stable.

[Amurtigress]

Re: x79-ud5 f13i bios

yes you are right when i started occt after 2 minutes i had a BSOD so i raised VCORE from 1,32 to 1,335 to achive stability,now i think after 1 hour occt running that i am stable.

^.^ I am a bit surprised that your 6 core is taking exactly the same voltage as my quad. I can run mine at 1.39V/4500 or 1.44V/4625, but the temperature and power consumption are much higher then and I don't see sense in that much extra heat where my chip is anything but performance challenged.

I'm not the better-safe-than-sorry person either after 15 years of OCing....

Another observation of mine with F13 BIOsses. Enabling the 1.25x strap does NOT take more voltage on the PCH anymore (previously 1.2V instead of the default 1.1V for stability), and it doesn't take that low multiplier trick anymore to enable it without totally locking the system up afterwards. All in all F13 on the X79-UD5 looks like a huge improvement.