08-07-2014, 06:20 AM
Right now I have 1x R9 290x (Sapphire TRI-X OC) and 2x R9 280x (Asus DC2T-3GD5) GPUs. My motherboard is an Asus Z97-PRO w/ an Intel i3-4130T haswell CPU.
If you are not doing anything but cracking hashes using your GPUs you can save a lot of money with something like the ASRock H81 Pro BTC just make sure you don't connect the molex connector it has for additional PCI-e power if you are using powered PCI-e risers like this case does since it will cause problems.
I'm not sure how wide the 7990 is so I cannot say for sure if it will fit. I have a good feeling it will, but it will probably be pretty tight so you would need some high power fans to keep them cool. I assume if you have 6x 7990s you probably don't care how loud it is anyway.
If you are not doing anything but cracking hashes using your GPUs you can save a lot of money with something like the ASRock H81 Pro BTC just make sure you don't connect the molex connector it has for additional PCI-e power if you are using powered PCI-e risers like this case does since it will cause problems.
I'm not sure how wide the 7990 is so I cannot say for sure if it will fit. I have a good feeling it will, but it will probably be pretty tight so you would need some high power fans to keep them cool. I assume if you have 6x 7990s you probably don't care how loud it is anyway.