Huge Temp Difference Between Cards Normal?

[DeptiOG]

Hello,

 

     While I am saving up for liquid cooling I have gone ahead and just installed the founders editon 1080s in my computer to give them a test. After two hours of gaming I looked at MSI afterburner to see the temps out of curiosity, knowing the founders will be nothing like when I liquid cool them, but heres the thing, my GPU1 temp reached 82c my GPU2 temp reached 40c on an SLI enabled game and yes, I have gone into my settings to make sure SLI is enabled. I have even added 3 intake fans and 1 extra outake fan I mean the thing feels very chill always. Why the huge difference between temps? Should I be worried about possible defect? I must add the GPU1 temp reached its 82c very fast while GPU2 gradually reached 40c. GPU2 is on the lower PCI slot and closer to the intake fans, and cards only have 1 spacing between them, so maybe GPU1 is just taking in GPU2s heat? 

[vong]

1 minute ago, DeptiOG said:

Hello,

 

     While I am saving up for liquid cooling I have gone ahead and just installed the founders editon 1080s in my computer to give them a test. After two hours of gaming I looked at MSI afterburner to see the temps out of curiosity, knowing the founders will be nothing like when I liquid cool them, but heres the thing, my GPU1 temp reached 82c my GPU2 temp reached 40c on an SLI enabled game and yes, I have gone into my settings to make sure SLI is enabled. I have even added 3 intake fans and 1 extra outake fan I mean the thing feels very chill always. Why the huge difference between temps? Should I be worried about possible defect? I must add the GPU1 temp reached its 82c very fast while GPU2 gradually reached 40c. GPU2 is on the lower PCI slot and closer to the intake fans, and cards only have 1 spacing between them, so maybe GPU1 is just taking in GPU2s heat? 

Are you sure the second card is being fully utilised? Just looks like the first card is doing all the work.

[Technous285]

I believe it's a common thing between all SLI setups - the card running monitors (and thus video output) will tend to run hotter than the card processing the offloaded work.

Something I've noticed with my 2x 980Ti's under waterblocks is the card with my 3 monitors hanging off of it nearly always runs 4-5*C hotter than the second card without monitors even when both cards are under identical workloads, power draws (with a 12mV difference) and clock counts. As I type this GPU 1 is sitting at 23*C and GPU 2 is sitting at 19*C.

[pwn_intended]

The top card will always be hotter (about 10-12 C in my computer) but a 40C difference is strange. Fire up MSI afterburner or whichever program you like for that and see if the 2nd gpu is actually being used.

[DeptiOG]

Hey guys, I was playing a game in beta (that supports SLI) but clearly something is wrong because when I switched to Overwatch my GPU2 usage resumed normal load and temps were within 1-5c of gpu1. 

 

thanks for all the help though! I feel stupid testing the cards on a beta game! 

[debro]

Just to be sure, you could switch the cards (interchange slots) and test them again with the same game, so you can rule out a hardware issue.