Originally Posted by 4LC4PON3
on that PSU I would go with a lower wattage card. That PSU Is known for bad efficiency takes a dive when it gets 2 hot. The 6850 should be ok.
Well Consider this your Rig draws around 200 watts & the 460 @ full load draws 280 watts right there is 480 watts. I doubt your PSU over the years is pushing what it used to push due to its age
A 6850 uses around 230 watts of Power @ full load
No. Please don't misinform fellow users. A 460 uses NO WHERE NEAR 280 watts. A 6850 under load uses NO WHERE NEAR 230 watts. More like 115-120 watts. (by comparison, a 460 uses 140-160 watts maximum)
You're confusing the FULL SYSTEM power load with the GPU power load. When reviewers make charts and comments to this effect, you will see it includes the full system, from the plug-in at the wall. It also isn't taking PSU efficiency into account.
His entire system, with a 460, would use around ~280-300 watts at full (gaming) load. With a 6850, it would use around ~260-280 watts from the plug.
Note in the power consumption graph "Total system power consumption, in watts." Conveniently, the 8800gt is also on the chart, so you can see how (little) your power usage will increase with a 460. (roughly 32 watts while playing Crysis)
Originally Posted by Fatal05
Finding a cheap 6850 might be the way to go then. While I know the 5770 is better than my card, I don't know if it's a worthy enough upgrade--especially with the 'help' of a weaker CPU.
Your CPU is fine, but if it's going to be a bottleneck, it will hold both cards back to the same degree, i.e. it would be pointless to buy a higher-end card because your CPU will be the determining factor in your minimum and average frame rates.
I hope that makes sense. Sometimes, I'm terrible at explanations.
I still stand by my recommendations, 5770 if you want cheap, or 6850/ GTX 460 768mb if you want higher-end. It's down to preference whether you like Nvidia or Ati/AMD.Edited by pursuinginsanity - 2/20/11 at 3:01pm