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AGP 8x vs 4x
- Thread starter MikeOCUK
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AGP 4x and 8x are interchangable, you do lose a certain amount of performance however (from memory about 5-10% in most cases). If it is a system with only a AGP 4x slot then it may be a bit of a waste of time getting an X1950pro since the whole system is probably rather slow. 
Real world performance difference will likely be under 5% (although I haven't seen any figures for modern cards to be fair).
An AGP 4x system doesn't have to be THAT bad, for example there's quite a few Northwood chipsets which only go up 4x but can run cpus at >3ghz.
Anyway, short answer, yes you can do it no problem. I used to run 8x cards (9800SE AIW, 6800) in a 4x mobo.
An AGP 4x system doesn't have to be THAT bad, for example there's quite a few Northwood chipsets which only go up 4x but can run cpus at >3ghz.
Anyway, short answer, yes you can do it no problem. I used to run 8x cards (9800SE AIW, 6800) in a 4x mobo.
semi-pro waster said:AGP 4x and 8x are interchangable, you do lose a certain amount of performance however (from memory about 5-10% in most cases). If it is a system with only a AGP 4x slot then it may be a bit of a waste of time getting an X1950pro since the whole system is probably rather slow.
I always thought that 8x agp was backward compatible with agp 4x.........and that 4x agp could not run an 8x agp because of the voltage difference!
From what I understand, AGP 2x runs on 3.3v, 4x is 1.5v and 8x is 1.5v or 0.8v . AFAIK, all 8x cards run on 1.5v because at the time, too many people would have had incompatability problems and would have had to upgrade their motherboards just to be able to use a new 8x card so the 0.8v wasn't adopted. Please correct me if I'm wrong.