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New 7870, low fps and in all games! Please help =)?

Tags:
  • Power Supplies
  • Graphics
  • Graphics Cards
  • AMD
  • Crossfire
Last response: in Graphics & Displays
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October 17, 2013 5:21:50 PM

I just recently bought my 2nd Radeon 7870 to crossfire it along with a new motherboard Msi B75a-g43. I didn't reinstall windows when switching the motherboard because my old one had the same chipset ( it was a B75ma-p45). I have upgraded all drivers for the graphics card (13.11 beta).
My specs are:

i5 3470
CX 600 psu
b75a-45
Kingston SSD
HDD
2 x 7870

Do any of you know where i might go wrong here? Could i be missing something besides upgrading to the latest drivers? is my CPU bottlenecking? is my psu weak? As far as i know an
i5 3470 should be able to handle a 7970, so it should be able to handle a 7870 crossfire.
I read around the forums and tried their solutions but they're kind of old dating back to drivers from 13.8 =S

Any help is greatly appreciated! Tanks!

More about : 7870 low fps games

a b ) Power supply
a c 92 U Graphics card
a b À AMD
October 17, 2013 5:32:11 PM

I would lean towards saying it's your PSU, 600w is the bottom end of what's suggested for crossfiring 7870's...though that's usually got some wiggle room built in. The CX series isn't super high on amperage, but not low either, also that PSU only has 2 6+2 connectors...which is usually a good indication of what the manufacturer feels it will power, if you're using molex to pcie power...i'd say don't. See if you can find a 750 or so to borrow from someone to test and see if your fps goes up, i'd think it will.
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