xmpt :
clutchc :
Before I'd recommend any high end cards, I'd want to know more about that "850W" power supply. Not all are created equal. Can you give the +12V specs for it; amps and watts?
And what CPU will the card be working with?
the cpu i have is currently clocked at 3.60ghz but it may be possible to overclock it to 3.80-4.10~ the psu is 7.9 amps and 50/60 hz with 100~240 V I believe. also will be working with 24 gigs of ram ( i know its a strange number). the company that produced the pc made sure it was upgradeable as far as im aware
Well... that still doesn't tell me which CPU you have. But it sounds like it may be sufficient to keep up with most cards if it is a 4 core.
Those PSU specs are meaningless. They are the primary side; the side that plugs into the wall receptacle. What we need is the secondary side. That will be listed on the PSU's nameplate.
But I'll go out on a limb and say the GTX 970 would be safe since it is only a 145W card. The GTX 980 if your PSU can handle it.