james1994 :
illuminatuz :
You better get atleast 700 watts PSU.. something like Corsair GS700..
and yes. you will have bottleneck..
Bottleneck arrives at high level of CPU/GPU usage like gaming..
Lets take a game for example, Battlefield.. It runs great on a i5 processor but if you have a low end GPU like HD5000 series or Nvidia gts450 or something like that, you will have a GPU bottleneck.. if you are running on a athlon x2 but your gpu is somewhere like HD7990, still you will not get the good FPS..
Here in the first case, the GPU is lagging and is not able to keep up with the CPU to process the data and in the second case, the cpu is lagging behind.. however these are extreme cases but the impact will surely be felt..
However in your build, the athlon will be a bottleneck for the r9 270x.. not completely.. but slightly.. you can take a good CPU like the i5 4670k or the FX8350 atleast right now so that they do not block each other..
To give a more clear example, assume water flowing through a pipe.. the water is the data and the two ends of the pipe, the in-let and the out-let are the CPU and GPUs.. and the output is the FPS in games.. if the water flows from a small hole through the big hole, you will receive less water even if the outlet hole is big because the inlet hole is the bottleneck. and vice versa, if the inlet hole is very big, however, the outlet is small, you will still get less water.. if both the holes are reasonably big, you will get good amount of water..
Hope this helps..
thank you for your wonderful explanation. You mentioned that i should get at least 700 watts. why is that? and since there will be bottlenecking how bad do you think it will be?
PSUs give lower power than their rating.. as a thumb rule, remove about 10% (20 to be on safe side) off of it..
If I say 700 watts PSU, I will get around 660 watts of actual smooth power.. not to blame the manufacturer, but that's why they all got the ratings like Bronze, Silver, Gold.. etc.. to how close the power quality is to what the manufacturer mentions.. Having more headroom will not do any harm.. however, having it on the lower side will actually have the potential to destroy your whole PC..
The bottleneck will not be much as games are basically graphics intensive.. however, for certain games like BF3, GTA etc. they consume a lot of GPU and quite some CPU..
If your GPU has the potential to give a 60 FPS output for a game, but your CPU is not fast enough, your game experience might not be upto its potential.. you could get somewhere around 45 - 50 FPS or so.. to keep a thumb rule, 30 fps is pretty decent.. and anything above 60 fps, the human eye cannot make out the difference. so as long as your FPS is above 30, you don't have to worry about bottleneck..
just try to get the max out of your hardware before changing them..
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