HD 4600 series bottleneck

ihunter23

Distinguished
Sep 26, 2009
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I will buy a new PSU & Graphics Card but I am afraid about bottlenecking.
1-HD 4650 & PSU= $90
2-HD 4670 & PSU= $120
Do you think any part of my actual system will bottleneck the HD 4670/4650 or viceversa?
Here is my system:
CPU: AMD Athlon 64 X2 7750 Kuma 2.7GHz @ 3.0GHz 95W
Motherboard: Asus M2N68-AM SE2
Memory: APACER 2GB RAM PC-6400
HDD: WD CaviarBlue 320 GB, SATA 3 Gb/s, 7200 rpm
ODD: DVD+/-RW