Originally Posted by fix0r75
Can someone with a little knowledge perhaps explain to me the differences in the bit rates on graph cards ? .... such GTS450 1gb GDDR5 128bit " <--- like that. And does it help to have higher bit rate for better performance??
that is a very hard question because the subject is extremely complex
on old video cards, having higher bit means it has higher performance
but when gpu's becomes more complex, the bit width isn't that as significant as before because of technologies such as GDDR5
its like when nvidia have 512bit GDDR3 on GTX 280 while ATI only has 256 Bit GDDR5 on HD 4870. theoretically the 512bit GDDR3 will produce more bandwidth but at the cost of higher manufacturing cost which translates into more expensive video cards(remember the MSRP cost of GTX 280 at launch at $649
today, the bus width could be used to tell which is better on the same type of gpu especially in lowend
ex. GT 430 64bit DDR3 < GT 430 128bit DDR3