HELP-Does SLI affect AMD CPU overclock? I cannot overclock in SLI mode.

[imported_Sincity]

Help guys/gals. I just received my second 7800GT and set it in SLI mode. Now my CPU will not overclock. It will only go back to default mode. Is this common?

 

[imported_Sincity]

BUMP to subscribe

 

[Matt2]

SLI should not effect your overclock at all.

When you mean you cant overclock, does it not boot? Unstable?

Need more info.

 

[krotchy]

Turn off PEG link on your motherboard. PEG caused some issues with my computer in SLI mode.

 

[imported_Sincity]

It boots but locks up in Windows, BSOD, and reboots. The BIOS states CPU in "Safe Mode".

What is PEG?

 

[ItsAlive]

Could be a power issue.

 

[Matt2]

COuld be driver issue as well.

Boot the computer into safe mode and use driver cleaner to wipe the drivers. Then try installing a different set of drivers.

Also, try booting the new GT by itself, just to rule out the possibility of a bad card.

 

[ItsAlive]

Yeah i would definately try the new card Solo and make sure its not defective.

 

[ItsAlive]

what brand and version are the 7800GTs? According to EvgaTech Gene......LOL......recommended power is 450watts for 1 and 500-550watts for SLI but didnt say about the amperage. Hopefully its just a driver issue like Matt2 stated above.

 

[imported_Sincity]

Thanks guys. I read the Abit manual and I have to disable the following:

-All BIOS fan controls
-AMD "Cool and Quiet"

Sux because I like the BIOS controlling the fan speeds.

 

[Pens1566]

C & Q should be disabled anyway if you're OC'ing.

 

[imported_Sincity]

I am using one eVGA 518 and one MSI. Both cards work fine solo. I now have SLI working, my A64 3200 OC'd back at 2.4ghz. But, I cannot OC my 7800GTs in SLI using Coolbits and value of 1A. It renders the system unstable and reboots. I had to go back in Safe Mode and delete the coolbits entry in the Registry. I am using driver V 84.21.

I am almost to the point of saying F**K IT, and go with a single 7900GTX.

 

[TheRyuu]

Originally posted by: Sincity
I am using one eVGA 518 and one MSI. Both cards work fine solo. I now have SLI working, my A64 3200 OC'd back at 2.4ghz. But, I cannot OC my 7800GTs in SLI using Coolbits and value of 1A. It renders the system unstable and reboots. I had to go back in Safe Mode and delete the coolbits entry in the Registry. I am using driver V 84.21.

I am almost to the point of saying F**K IT, and go with a single 7900GTX.

Before you decide to "F**K IT", the X1900XT is a very attractive card

For a single card configuration, I think the X1900XT(X) is a better option then the 7900GTX. The X1900XT can be had cheaper and has a few more features (like HDR+AA, which in Oblivion looks great).

If I were going dual card's, the most attractive option is Dual 7900Gt's in SLI (which I currently have) and whose price isn't "that" obsurd. Plus I vmoded them and now they run just as fast as a 7900GTX.