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PCIe X1 Graphics card ??

digitaldreams

digitaldreams

digitaldreams

Associate
Joined
5 Jul 2007
Posts
512
What will work in this socket ???

It's the standard length black PCI express socket (not the tiny x1 slots for modems etc). It's just labelled x1 (a tick), x4,x8,x16 (a cross !).

Will most cards work but have the interface throttled ?, or does it have to be a special x1 speed card ?. It's a hot box so I'm looking at the half height cards to minimise the airflow problem.

Regards & thanks in advance....
 
Yes it should work, the card negotiates a link width with the PCI-e switch matrix, and selects a mutual supported width.

Though the card will be as good as useless at that speeds, its running at 250MB/s. Note that x16 cards have a bandwidth of 40GB/s.
 
Thanks all....

It's actually an IBM (the only four letter, three letter word I know) desktop. Onboard Intel 82915g/gv/910gl graphics chipset knicking 128mb from the main ram.

Anythings gotta be better than that !

Regards
 
Yup if its a physically-x16, electrically-x1 slot then a lot of cards should work in there, but as mentioned performance will be pretty poor with the x1 interface so dont go spending too much on it:)
 
Your right, anything will be better!

Don't spend much though as already stated the 1x speed will throttle the gfx card.

However, I always thought 1x pci-e was 500Mb/s and 16x was 8Gb/s? Somebody will correct me if i'm wrong ;)

The best I can find with a quick glance is a 7300GT review running on 1x pci-e. It varies a hell of a lot between games resulting in a 30-70% drop in performance compared to a 16x slot.

http://www.tweaktown.com/reviews/10...ormance_with_galaxy_geforce_7300gt/index.html

However, that will probably still be a 300% improvement on your on board gfx card.
 
a lot more than 300 id think, its a 910/915 :P

As for PCIe speeds, its 250MB/s per lane, in each direction....so yes it can be classed as 500MB/s for x1 and 8GB/s for x16. Certainly isnt 40GB/s, hoping thats a typo :P
 
yeah 250mb per lane so like you said it's either 500mb/s vs 8Gb/s or 250mb/s vs 4Gb/s. Depends how you want to describe it.

Probably a typo at 40 Gb/s

Of course as that review link states, the cards don't run 16x slower. Would be interesting to find a comparison using a more modern card but I doubt anybody will have tried it.

I wonder if I can set my pci-e speed in bios to 1x and do a comparison with my 8800 GTS 512Mb? I might give it a go tonight and see how much it cripples it by.
 
8800GTX don't work in anything under 8x :-) ... I found that out when I bought a temp board while evga replaced my board a few months back...
But I doubt you'll be putting that in there.
 
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