I'm in need of some help please
Memory: 6gb Corsair XMS3
PSU: 1000w Coolermaster silent pro
CPU: i7 930
GFX: 2 4890s
Now my problem is with the limitation of the haf922 case i cant fit my second 4890 in the 2nd x16 slot of my motherboard but that is fine as the performance loss ain't that bad, BUT Now i have to put it in the slot right next to my other 4890 and it causes horrible heating problems (under load the top card reaches temps over 100 degrees Celsius and it idles at 74)
Now i need to know what would be the best solution if there is one, with out buying water cooling or a new case?
I have two Zalman 120mm sharks in the side plate.
The cards run 54 degrees without load single...
I don't reckon I would get much for them and I don't have an insane amount of cash to fork out for a 5870(which they actually beat in crossfire on 3dmark Vantage and yes i know benching is bleh but it gives some sort of an indication at least)
the big problem is cleary airflow as the top(main) one is right next to the bottom one so no space for air to circulate in but how do i solve this? maybe a slim aftermarket cooler?
you are stuck between a rock and hard place, I feel for you. Most aftermarket coolers are dual slot tall rather then slim and the better ones are not cheap. So you would be investing more money into a product that is losing value fast with the 6xxx series coming out. You said a single ATI 4890 (still a good card) gives you good performance. I would run with one card, sell the other and use the money to start saving for a future card.
This is one of the reason I personally never liked SLI/CF set ups.
Experiment downclocking the cards. Sometimes there is a sweetspot before heat rises much faster. The 4890 was clocked high to compete with Nvidia's fastest cards.
Try 750mhz, 4870 speed, see what temps come out of the test.