Originally Posted by adridu59
500W is already with headroom. Quality PSUs are always rated higher than what they can do.
A decent power supply should be able to output around 100 watts more then its rated power.
In regards to the gtx 760 vs 7950 vs 7970, the gtx 760 is slightly faster then the 7950 at stock speed (from the benchmarks i have seen) and can overclock very far, sometimes to the speed of the 7970. Obviously the 7970 can be overclocked far aswell so the 7970 would be faster when both are overclocked.
The i5 with a less powerfull graphics card vs an 8320 with a more powerfull graphics card argument depends on the situation. When people talk about cpu 'bottle necks' they usally mean how many fps is being produced and if the gpu usage is below 90%. Although this is true to an extent, i dont beleive that this is an accurate measure. The main concept of frame latencies and response times have to be considered when paring a cpu to a gpu.
The fact is, even though the 8320 with a 7970 might produce more fps then the i5 with a gtx 760, the latter combination might produce a much lower frame latency aswell as a much higher minimum frame rate which will result in much smoother gameplay. For example, the 8320/7970 could be producing 80fps and the i5/gtx 760 prodcuing 60 fps but the minimum and maximum render time for the fx 8320 might be more then that of the gpu rendering time resulting in less consistent gameplay. These are two measurements that are rarely taken when reveiwing cpu and gpu game performance.
Anyway thats just my veiw on the subject but i think that pairing a less powerfull cpu with a more powerfull gpu rather then the otherway round is sometimes a false economy.
http://pcpartpicker.com/p/1cU5MEdited by South80 - 7/3/13 at 10:40am