running the following
amd a10 5800k
gigabyte fm2 mobo
16gb gskill ripjaws
3 sata hds
2 x 7870 tahiti gfx cards
how much power do i need and what would be the ideal size
Hi - realhardtech suggests 600w for a sys with 2 7870's CF, and that has some
headroom built in (not all 600w PSU's are created equal) to insure
enough amps on the +12v rail(s).
However, you do need a PSU with 4 PCI-E connectors(although you can
use molex to PCI-E adapters) for 2 7870's, and PSU's with 4 PCI-E
connectors generally appear on quality PSU's of 650w & above.
So, you can run your sys with 600w(even a good quality 550w) and get the
molex to PCI-E adapters you need or purch a quality 650w unit with 4 PCI-E
connectors, which is what I would do.
Quality brands: Seasonic, XFX, PC Power & Cooling, Rosewill Capstone series,
Antec, most Corsair's, and a few others.
if you would like me to recommend a couple, plz post your budget