I recently acquired another GTX 460 from a friend for $70 and decided to try my luck with sli. However I have run into a serious problem. I tried to play Skyrim and within a minute or so the top card was at 100 C while the bottom card was about 40C. This was with the fans turned up to 85%. They are 1G Galaxy cards and I’m not sure if there’s anything I can do my motherboards PCI slots leave them zero room to breath the two cards are basically touching. So my question is what can I do about this? I was considering selling both cards and getting new one/ones but what would get me near/same performance as sli gtx 460 at around $220-250.
one card doing more work and that one card getting hot has been a problem since inception. think someone would have made them work together more along the way.. ??
however, not sure if this would work but.......... one of my old BIOS' had options to configure what slot the main card would be when running dual cards. Look in the BIOS for that option and try enabling the lower card as first device. Plug the dvi cable into that and see how it goes......... if it works.
enough fresh cold air getting to these cards or is there no room between them ?
option/one new bigger card to exceed the performance of what you have.
Are you sure the second card is good ? did you try it alone in the machine ? is it, or are they free of lint in the fan and heat sinks. Did you try reapplying thermal paste ?
let me tell you what I did in this situation once.
first SLi set-up was on a mATX board (P55 EVGA E652), the cards were so close that I had to add a rubber spacer between them.
I had SLi N460GTX Hawks TwinFrozr II models so I had optimal cooling and fan control.
besides the spacer and the fans up high i had to add a case fan to the side panel to blow on the cards.
now this is with matching cards like I said with no issues running in perfect harmony.
I switched to better case with dual side panel vents and dual vents up top and the temps dropped dramatically
but before I got to that point I also got a bigger ATX (AMD 990FX) motherboard and split the cards up having more space in between..
but with the bigger motherboard BEFORE the upgraded case temps still got kinda high and I even had to dial down my CPU overclock.
finally I sold the SLi N460GTX Hawks and bought a N570GTX TwinFrozr III PE/OC.
overall at stock settings I lost minimal fps in gaming but I noticed a slight difference.
SLi 460's in gaming are slightly better than a GTX 580, and my 460's were overclocked.
the GTX 570 is a hiccup off the GTX 570 but with the right version of 570 I was able then to clock it to GTX 580 (reference) performance.
so that's why I say fps was a minimal loss..
but switching to the (equal) single card is better cause the advantages are/were:
* less power consumption
* less heat and heat across entire unit
* less noise from fans not being in overdrive
* eliminates (I didn't have many) SLi compatibility issues
now I'm not saying upgrade to a GTX 570.....
I'm just giving you a personal example on what I went through last year when i was in this situation.
Thanks for all the advice i did some things such as running the video from the bottom card and making my 2 case fans right above the cards pull air insted of blow air. There was a small change the card stayed around 80C on skyrim and took longer to get there. However isnt that still a little hot? Also if it helps this is my case http://www.newegg.com/Product/Product.aspx?Item=N82E168... i have fans in all spots.
Those Galaxy models are terrible when it comes to cooling in general, improving air flow in the case as others have suggested and making sure there is at least a decent gap between the two cards make a world of difference. Sadly your options are very limited when it comes to aftermarket cooling on a small budget. The best thing you could do is go liquid for both cards but not cheap.
Your second option is to try to force air between the cards and it almost always works.
there's a fan control program that nvidia released a while back. the fans always blow too slow to give the impression the cards can be kept quiet while running.. ( nvidia cards are the hottest )........ use the program to make the fans on both cards run constantly at 40 or 50 percent ( for starters ) and see how it goes.
Ok i set up all the fans as you said....and i know the Galaxys suck at cooling they where however the cheapest 460s i could fine...As for forcing the air hehe well i took out some tape and a spare 140mm fan and stuck it right on top of the cards im about to go test it out so lets see if this jerry-rigged cooling system works..
Ok so with my new setup here the card seems to stay right around 74C is this a safe temp?
Indeed trying to think if there is any other things i can do currently have the 2 side fans blowing on cards and the 140mm taped on top of cards blowing and the front, rear, and top fans blowing air out of the case. Also have the fan speeds on the cards at 90% (sounds like a freaking jet)