GTX 460 SLI problems

[torais]

Hello, i recently added a second nvidia GTX 460 to my system, enabled SLi, and i get graphical glitches in games now, and i dont think i even got a performance boost! have tried reinstalling drivers, and even reinstalling the cards!

in games there are white flashing patches on the screen, or flashing grey squares which are slightly see through.

temps are not too bad, never peaking over 60

i have an I7950
6gb of 1600mhz triple channel RAM
and a corsair HX850w psu.

any help would be appreciated, thanks.

 

[nforce4max]

What brand are your GTX 460s? Also what are your temps?

 

[torais]

What brand are your GTX 460s? Also what are your temps?

one PNY and one EVGA, primary card ranges from 40-60,(evga) secondary card ranges from 35- 50 (pny)

 

[nforce4max]

What are the voltages on the 12v rail? How much are the changes on the 12v rail during normal use. If it drops to low or has large changes over a short period of time can make the machines unstable. Are you sure the whole card is cool and not just the core? It doesn't matter much if the core is 60c while the power vrm is roasting at 100c. Overheated vram can cause many visual errors as well.

 

[Jurgens]

Uhm im not sure, but the cause could be mixing the brands, EVGA and PNY. i really think that could be a problem

 

[Jurgens]

oh dude, try putting the PNY as primary and EVGA as secondary

 

[Jurgens]

and another thing. did you test both cards individually on the slots they are in if you SLI. eg. if you have the evga in the top slot and the pny on the bottem slot. did you test both individually on there slots.

 

[torais]

i dont believe it is much to do with heat, if i disable SLi, i have no problems at all. (unless with SLi, temps are much hotter?)

the 12v rail doesent seem to change to rapidly, it seems to peak at 4.1v during games, and while not doing any demanding applications, seems to remain under a volt.

 

[torais]

jurgens, ive mixed brands with SLi before, with no problems, i dont think it would be that, the cards are at the same clocks with the same memory ect.

and i have swapped the cards round, with no changes.

 

[Jurgens]

latest drivers?

 

[torais]

latest drivers?

indeed.

 

[Jurgens]

what motherboard do you have? did you try to update the bios?

 

[torais]

gigabyte X58-USB3

i diddn't consider updating the bios, could it be part of the problem?

 

[Jurgens]

i really dont know. it could.... if you sli, in wich card was your screen pluged in, primary or secondary?. if you havent tried swoping cables do that now.

 

[Jurgens]

okay wait. what power supply do you have?

 

[torais]

i will update the bios asap, Ive tried swapping the monitor cable between cards with no change.

 

[torais]

okay wait. what power supply do you have?

corsair HX850

 

[Jurgens]

thats more then enough, try the bios and let me know if it worked

 

[d1rtyju1c3]

i dont believe it is much to do with heat, if i disable SLi, i have no problems at all. (unless with SLi, temps are much hotter?)

the 12v rail doesent seem to change to rapidly, it seems to peak at 4.1v during games, and while not doing any demanding applications, seems to remain under a volt.

If that is your 12v rail then it is way under spec the 12v rail should always be around 12v. Use HWmonitor to monitor the 12v rail.

 

[torais]

If that is your 12v rail then it is way under spec the 12v rail should always be around 12v. Use HWmonitor to monitor the 12v rail.

HW monitor reports the -12V rail to be around 12.1v

 

[swifty_morgan]

go into the nvidia control panel and FORCE vsyn on for all apps.

 

[Guest]

Switch your sli bridge connector around.

 

[elkein]

Don't have the 460, but I did have some flaky SLI problems originally. My problems were entirely isolated to the network driver, and the bridge between cards, It took some time to iron both problems out. Considering the cards worked perfectly individually. Literally the entire fix was the updated network driver for program problems and wiggle the bridge to get better contact for graphics glitches.

 

[torais]

go into the nvidia control panel and FORCE vsyn on for all apps.

enabled that, the graphical problems still remain.

 

[torais]

Switch your sli bridge connector around.

i will try that.