mainboards

[how-high]

hi
just bought my first card

MSI R7950 Twin Frozr 3GD5/OC BE G Radeon HD 7950 3GB 384-bit GDDR5 PCI Express

for this card I have a pc ready

however when they are available again I wanna get another 3 or 6 cards (Sapphire AMD Radeon HD 7950 3GB)

now what mainboard have 3 pci-e slots?

[bekho]

These look very nice and are pretty cheap, but they're out of stock everywhere except on eBay where they're way overpriced - http://www.newegg.com/Product/Product.aspx?Item=N82E16813157471

Just look around, there are tons of mobos with at least 3 pci-e slots. What CPU/RAM do you plan on running?

[how-high]

something cheap since I understand cpu and ram don't really matter that much?
i thought it was all about gpu?
or do they?

anyway I was thinking 2 or 4 gb ram
800w powersupply
cpu I have not been thinking about really, any recommendations?

[kalman]

Try to get a used MSI 890FXA-GD70, it has a lot of PCI-E slots. I used one for a year mining 24/7 with 3 vga cards without any hiccup.
ASRock and Biostar also have motherboards for mining.