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Interface Bandwidth/Card Bandwidth

Soldato
Joined
3 Aug 2007
Posts
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London
I have a PCI-E 1.1 motherboard which handles a lovely 8GB/s
PCI-E 2.0 does a nifty 16GB/s

Now how on earth do I relate these to graphics cards?

Compare2.jpg


I hear all over the place that PCI-E 1.0 is enough for the 4870, now how do I put those numbers on that there table into perspective for whether or not PCI-E 1.1 can handle a 5850, or even 5870.

I'm not well versed in this area so please help :confused:
Thanks.
 
Man of Honour
Joined
13 Oct 2006
Posts
83,144
Theres no direct link between the interface bandwidth and the memory bandwidth...

There is no part of the card spec that can give you a direct pointer as to the interface bandwidth it needs either... its something that you either need a "feel" for or benchmarks to show...

x8 PCI-e 1.0 could probably feed a 5870 while results would be less than optimal it wouldn't be hideously throttled either... ideally you want atleast x16 PCI-e 1.x which is still sufficent to drive any card out atm - tho that might change with the 5870X2.
 
Last edited:
Soldato
OP
Joined
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Location
London
My apologies, but I didn't circle those figures, that was just on a review site :p

How do I know if the card will work at its best on the board?
 
Associate
Joined
25 Jan 2009
Posts
1,398
Ok sorry, I meant to say you will not notice a difference if it were v1 or v2 of PCI-E either way so it doesn't matter and you won't need to worry about it

But then you're also thinking then what's the point of v2, it's just future proofing really, soon PC systems will be capable of using more bandwidth than v1 but by the time that happens you will have upgraded your motherboard and a new motherboard will have at least a PCI-E 2.0 slot so it's not a concern
 
Soldato
OP
Joined
3 Aug 2007
Posts
2,520
Location
London
Ok sorry, I meant to say you will not notice a difference if it were v1 or v2 of PCI-E either way so it doesn't matter and you won't need to worry about it

But then you're also thinking then what's the point of v2, it's just future proofing really, soon PC systems will be capable of using more bandwidth than v1 but by the time that happens you will have upgraded your motherboard and a new motherboard will have at least a PCI-E 2.0 slot so it's not a concern


Thanks mate, that clears up concern. I was thinking that we were nearing that limit of bandwidth already y'see. Thanks.
 
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