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450GTS - PCIe x16 vs x1 w/ riser

post #1 of 14
Thread Starter 


I'm actually a little shocked, but not changing anything other than the install slot (main PCIe x16 slot, vs x1 slot with an x1 to x16 riser) showed me a very interesting tidbit:

Typical PPD in x1 slot with x1 to x16 riser = ~6900 (on 6806/6801)

Typical PPD in x16 slot = ~7600 (on 6806/6801)

Now, I'm wondering if it has anything to do with being a Fermi card, or maybe there really is something lost going through the riser, but I'm rather perturbed...

I have since dropped the 9800 in favor of the 450 for personal reasons.

I do, however, have an open proposition...I will send someone the x1 to x16 riser (see below) to test much more thoroughly than I did if they wish...any takers (we'll work out shipping/what have you via PM).
post #2 of 14
I think it's more of the fact your going into an x1 slot. To really test this, you'd need an x16 to x16 riser
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post #3 of 14
Well duh it's gonna be worse, you have 1/16th the bandwidth.
 
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post #4 of 14
Folding is not very bandwidth intensive, but I don't think 1x is going to cut it. I run my 450 in a 4x PCIe 1.0 slot (P55 PCH) and it does not take a hit in PPD- runs 8k on 1348s.
 
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post #5 of 14
Thread Starter 
Quote:
Originally Posted by MetalBeerSolid View Post
Well duh it's gonna be worse, you have 1/16th the bandwidth.
I've read the quote "folding is not bandwidth dependent" or some variation thereof in this forum probaboly a couple HUNDRED times...so thank you for sticking your foot in your mouth.

That being said, this was an experiment on my part...I'm actually curious if it has something to do with the Fermi platform in general...hence the "does someone one to test more extensively" call out.
post #6 of 14
If you want to ship it to me, I'd gladly test it out for you. I just so happen to only have one PCI slot in my mobo, I can deal without audio for a little while lol.
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post #7 of 14
Thread Starter 
I'd actually like to see someone with an 8/9 series, a GT, GTS and GTX that's willing to take the time...but, I may just ship this to you anyway Let's see what the week brings
post #8 of 14
I can probably get my hands on an 8800GT as well. Send me a PM whenever.
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post #9 of 14
You should wait till someone that has done this in the past comes in and sheds some light.
It has never been a problem, but if you need that particular riser tested let me know I got 480, 9800gtx+, 8800gts, 8400gs, to test it with.
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>.<
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post #10 of 14
Quote:
Originally Posted by mike44njdevils View Post
I'd actually like to see someone with an 8/9 series, a GT, GTS and GTX that's willing to take the time...but, I may just ship this to you anyway Let's see what the week brings
I've got an 8800GS/9600GSO, GTS 250 (8800GTX/9800GTX) and a gtx 275 to test.
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