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agp vs PCI-e with the same model

post #1 of 11
Thread Starter 
Would there be any difference in performance with a 6800gt agp vx a 6800gt pci-e? I currently have a 6800gt agp. I bought a 6800gt pci-e on Ebay last night because It was so cheap. ($147) I'm just wondering if there will be any difference in performance.

I currently have the eVGA 6800gt 256mb. which I am going to sell.

I bought the LeadTek 6800gt 256 pci-e.....it has a copper heatsink and I was reading an article that it was really nice for overclocking.....

just curious

Hope you all have a great day
post #2 of 11
The difference between two of the same cards on a AGP and PCI-E is very small.
PCI-E was not really intended to be performance boost over AGP it was there to allow more cards to be produced and a whole new socket type to invented (my opinion).
However more bandwith is avaliable on PCI-E than AGP and thus will allow later cards to send/receive data at a faster rate than AGP. The difference between your cards could be as little as 1-2% depending on the system.
post #3 of 11
I agee the overall performance gains will be not quite so obvious but the gains will be in the transmission rates offered by the improved bandwidth.
Also the inclusion of GDDR3 memory IC's over the GDDR of the AGP should alow for a little more gain in the memory clocks.

Go the PCI-e.

cheers
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post #4 of 11
You have a motherboard that has both AGP and PCIE? I didnt think that was possible.
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post #5 of 11
there are some VIA motherboards taht support both agp and pci-e but i dought he has one
post #6 of 11
PCI-E is faster, but not by too much, like they've all said, you'll see maybe 5-10FPS drop(swithching to AGP), not much.
theres a list of the slot speeds out there, i'lll try to find it
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post #7 of 11
Quote:
Originally Posted by grkgus
You have a motherboard that has both AGP and PCIE? I didnt think that was possible.

Its possible. IMO not worth it but here is one of the better ones on the market. Only a 20-pin but decent reviews.
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post #8 of 11
and even if PCI-Express allows more bandwidth, dosen't actually mean that it's using all of it.

Proof is that some people have had highend videocards (i.e. X850XT PE), and accidently had their AGP speed @ 4x and once they realized and changed up to 8x they didn't notice a difference, and neither did 3dmark scores. Meaning that not only is AGP 8X not up to its full potential, but neither is AGP 4X, meaning that there's no way that PCI-E 16X is being used. Its not that the motherboard can't handle all of the information, but becuase the videocard manufacturers haven't been able to meet the full potential of either bustype, and in addition to that, if the 16X bandwidth capabilities were reached we'd still have a problem becuase it would bottleneck like hell on any processors we have today. 2x 7800GTX's Bottleneck on a FX-57 (not sure about the FX-60).

So I personally see no advantage from AGP to PCI-Express, unless its for SLi, and I wouldn't be upgrading to PCI-Express if it weren't for all the companies making PCI-Express the standard.
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post #9 of 11
Thread Starter 
the only reason I am switching to pci e is because all of new cards are built for it...I can't buy a 7800gt or gtx on agp.....thats why I bought this motherboard, because when I buy a 7800gtx in a couple of months, I wont have to buy a new motherboard.

Is this considered double posting? being way down the page? If so, sorry.

Yes, I am planning on selling the AGP card, I just am not allowed to post it on here.
post #10 of 11
Seeing as it was so cheap you may want to sell your AGP card as they are getting harder and harder to find these days.

As for the upgrade itself as long as your motherboard has a PCI Express slot as well you'll be ok. But you do realise that there will be no difference as even the latest cards don't make full use of the extra bandwidth provided by PCI Express yet...
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