**Official** GIGABYTE 333 Onboard Acceleration P55A Series - P55A-UD6/UD4P/UD3

[MarcusFoX]

hey guys I got an issue.. I cant get my p55-ud6 rev 1.0 and my 875k to stress test with HT on no matter what I do. Ive tryed f6-f8-f10-f11c bios and everything seems the same. here my current settings.

cpu : 4ghz
multi:x22
vcore: 1.2875
qpi-vtt: 1.26
bclk: 186
dram: 1.72
pch: 1.18
PLL: 1.82
pci-e: 101

memory performance is set to "standard" mode

Memory: Kingston HyperX khx1600c9d3k3

2232mhz version 4.10 memtested went 10 full tests 8 times over no problem, so I dont think its the ram at all.

7-12-8-28-88-1t


all acc settings are diabled except HT the misc section everything is disabled. It seems like alot of folks in here are using the p55A-ud6??? is the p55-ud6 is kind of a lemon for overclocking an i7??? thats image im getting since ive tryed every trick I know and Still cant get this think stable with ht on. with HT off in opinion it need way to much voltage to become stable with only 4 cores kinda disappointing.

any help you be great

[devil_mcry]

llc ?

more i7 lynnfield can run @4ghz with 1.3+v

now you have an 875k, this is good normaly i know that him can run @ 4ghz with 1.26-1.27v but with low bclk, i don't know if @ 186 it's possible...

however try

vcore 1.32v (under llc2)
vtt 1.30v
pch 1.05 (this is not critical for overclock)
pll 1.80-1.82v


for example, my i7 860 with my p55a ud6 can run stable @ 4ghz, 192mhz of bclk ram 10x with 1.328v (under llc 2) and vtt 1.30v, vpll 1.80

@ 186mhz of bclk i need only 1.26v but not all i7 are same

ps do u have p55.ud6 or p55a ud6?

[MarcusFoX]

llc ?

more i7 lynnfield can run @4ghz with 1.3+v

now you have an 875k, this is good normaly i know that him can run @ 4ghz with 1.26-1.27v but with low bclk, i don't know if @ 186 it's possible...

however try

vcore 1.32v (under llc2)
vtt 1.30v
pch 1.05 (this is not critical for overclock)
pll 1.80-1.82v


for example, my i7 860 with my p55a ud6 can run stable @ 4ghz, 192mhz of bclk ram 10x with 1.328v (under llc 2) and vtt 1.30v, vpll 1.80

@ 186mhz of bclk i need only 1.26v but not all i7 are same

ps do u have p55.ud6 or p55a ud6?

Hey Devil its a P55-UD6 rev 1.0 I did some further test this morning and my chips seemed to be more stable at a vtt of 1.18v and lower. I actually got it too LINX stress with a 17k problem at 4ghz at 1.18v vtt, but as soon as I took the voltage near 1.3v vtt it would crash. Its kinda of a wierd issue but I think the chip is just sensitive too vtt.

just too add this in I can stress the cpu at 1.16 vcore at 3.7ghz at 1.18 vtt passes test no problem

vcore 1.32v (under llc2)
vtt 1.30v
pch 1.05 (this is not critical for overclock)
pll 1.80-1.82v

and these setting are exactly what I tryed at first like .... when I read your post it was like you read my mind hehe =) sep my vtt was 1.28v I think and my PCH was alittle higher at 1.1 but I dont think that matter's much.

what is the stepping on your guys 860's/870's?? its B1 on the 875k.

[Oztopher]

Yep stepping is B1.

Just set VTT to sweetspot of whatever bclk u run. So it looks like for that bclk u only need 1.18vtt, keep it as that. But to be honest i found keeping vtt closer to vcore helps stability. So if ur using 1.32vcore, then set a bclk/cpu multi combination in which it will NEED around 1.30vtt and 1.32vcore. But hey, it might not be the same on ur chip, or even the 875k altogether.

[MarcusFoX]

Yep stepping is B1.

Just set VTT to sweetspot of whatever bclk u run. So it looks like for that bclk u only need 1.18vtt, keep it as that. But to be honest i found keeping vtt closer to vcore helps stability. So if ur using 1.32vcore, then set a bclk/cpu multi combination in which it will NEED around 1.30vtt and 1.32vcore. But hey, it might not be the same on ur chip, or even the 875k altogether.

I know what you guys are saying is defently right.... im switching away from the f11c bios again see what happens

[MarcusFoX]

didnt make a different... still the same problems... cant get past 4ghz under linux with HT on. try f8 how...

[Oztopher]

What voltage do u need for 4GHz with HT off?

[MarcusFoX]

too gets things stable around 1.32v without HT the funny thing is that I would have too add more voltage once I add alittle VTT or Xcore it just locks up. with the x58 and a i7 920 D0 I no prblem doing 4.4ghz ht on at 1.3875v... in my opinion that isnt right my i7 920 would do 4ghz at less than 1.15v.

I tryed f8 last night no change I think the boards just a lemon... I got a MIIIE comming ill try this overclock with it and see if the resault are the same... my bet is either this board doesnt like the ram I have since it isnt on the QVL or the board just a lemon but its odd I was able to run 2232 stable thats pritty good for not being on the QVL... I can see it being the chip Its a hand picked batch this chip should really clock.

im at 3.718 atm 1.15v 1.18vtt running perfectly stable 186bclk 2232mem... its got me stumped.

details on my psu its a corsair HX 850

[devil_mcry]

too gets things stable around 1.32v without HT the funny thing is that I would have too add more voltage once I add alittle VTT or Xcore it just locks up. with the x58 and a i7 920 D0 I no prblem doing 4.4ghz ht on at 1.3875v... in my opinion that isnt right my i7 920 would do 4ghz at less than 1.15v.

I tryed f8 last night no change I think the boards just a lemon... I got a MIIIE comming ill try this overclock with it and see if the resault are the same... my bet is either this board doesnt like the ram I have since it isnt on the QVL or the board just a lemon but its odd I was able to run 2232 stable thats pritty good for not being on the QVL... I can see it being the chip Its a hand picked batch this chip should really clock.

im at 3.718 atm 1.15v 1.18vtt running perfectly stable 186bclk 2232mem... its got me stumped.

details on my psu its a corsair HX 850

with HT?

your 875k is the second 875 very unlucky that i see, other 875, as you, want 1.38v to run @ 4ghz ht on

but your vtt is very good :P

yesterday i play with settings, i found a good setup for 24/7

i7 860 3906mhz 21x186mhz @ 1.264v (under llc, 1.248v in idle)
ram @ 1860mhz 7 8 7 24 1t 85 1.632v
pci-e 102
vtt 1.26v
vpll 1.80 vpch 1.05 other su normal



is very good because vcore and vtt is realy low, 1.264v for 3900mhz is good

i think that my i7 can run @ 4ghz with less vcore of 1.328v...

[devil_mcry]

however now i must try to change my vga card

my sys is RS, i try different setup but always in game online i get bsod with 0x124

i try to up vtt +0.04v
i try to up vpch 0.05v
i try to up vpll
i try to relax timing of ram

never lol always it bah
ideas?

ps prime95 stable for 3-4 hours, not very long time but in game i think that my sistem is less stressed

[stasio]

GA-P55A-UD7 - F8b
GA-P55A-UD6 - F12c
GA-P55A-UD5 - F13b

GA-P55-UD6 - F11d
GA-P55-UD6-C - F11b
GA-P55-UD5 - F11c

- Improve SSD compatibility
- 09.Nov 10

[MonkY]

- Improve SSD compatibility
- 09.Nov 10

Does anybody have a clue what they mean by "Improve SSD compatibility" ?

Btw, i have a kinda "huge" problem with my new P55A-UD6. It simply doesn't want to boot untill i remove all my USB devices... Everything i have now worked flawlessly on an Asus Maximus III Formula. I have done the upgrade convinced by a good friend of mine... and now i am actually afraid to shutdown or reboot my PC... as i have to open and take every USB out (with my 620W Enermax turned off). I've tried taking each of them out (i have arround 10 USB devices) but it's simply not booting up. All i can see is the lighted Power button on the motherboard flickering a little... Pressing it does absolutelly nothing. I am really out of ideeas... Thx for pointing out any kind of help !

[8800's@over]

The Gigabyte GA-P55A-UD3 Support SLi ??

[BababooeyHTJ]

The Gigabyte GA-P55A-UD3 Support SLi ??

No, and crossfire would only work with 16x/4x. It's kind of a single video card board.

[ehume]

Any word on when to expect the Rev 2 boards?

[ehume]

Gigabyte tech support told the P55A-UD3P Rev 2 is already available in the US. Anybody seen a Rev 2 board?

[tonus]

I want to ask you is working properly function CPU Smart FAN Mode [Voltage] driving the 3 pin fans.

[ehume]

I want to ask you is working properly function CPU Smart FAN Mode [Voltage] driving the 3 pin fans.

Yes, for P55A-UD3P . . . before I shorted out my fan control circuit.