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question about pcie 2.0 speeds?

post #1 of 17
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CCC says my card is running PCIe 2.0 8x but both my card and mobo are supposed to support PCIe 2.0 16x is there anyway to fix this? Will it effect performance?

Thanks

My specs are listed below click the link (NZXT4400) for full specs (very detailed)

Thanks again
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PHANTOM-A4
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post #2 of 17
Specs:

1 x PCI Express x16
1 x PCI Express x1
2 x PCI

That's why, your mobo is not a Crossfire mobo. Sorry but those speeds will remain, you should just take out one of your 3870's for better performance.
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post #3 of 17
Quote:
Originally Posted by Grafixs View Post
you should just take out one of your 3870's for better performance.
Err...what?
post #4 of 17
Quote:
Originally Posted by tambro4 View Post
CCC says my card is running PCIe 2.0 8x but both my card and mobo are supposed to support PCIe 2.0 16x is there anyway to fix this? Will it effect performance?

Thanks

My specs are listed below click the link (NZXT4400) for full specs (very detailed)

Thanks again
Check out CPU-Z mainboard tab, it'll tell you the rate. Your board does not support PCI-E 2.0 btw and it will not restrict your cards performance at all. There isn't a GPU on the market that can max out the bandwidth of PCI-E let alone PCI-E 2.0
Edited by Mhill2029 - 6/17/08 at 6:36pm
 
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post #5 of 17
Quote:
Originally Posted by Grafixs View Post
Specs:

1 x PCI Express x16
1 x PCI Express x1
2 x PCI

That's why, your mobo is not a Crossfire mobo. Sorry but those speeds will remain, you should just take out one of your 3870's for better performance.
sorry, but no. PCI-E @8x is plenty for a 3870. You might see it bog down a little bit compared to x16 x16, but it's not that bad...

However, the board in the OP's sig rig only has one physical PCI-E slot, so i'm wondering how he even managed to get the cards slotted.
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post #6 of 17
Quote:
Originally Posted by alexgheseger View Post
However, the board in the OP's sig rig only has one physical PCI-E slot, so i'm wondering how he even managed to get the cards slotted.
Because it's still a PCI-E slot, just channeled to 1/16th the bandwith
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post #7 of 17
Quote:
Originally Posted by Grafixs View Post
Because it's still a PCI-E slot, just channeled to 1/16th the bandwith
But they physically don't fit unless you cut out the little bit on the end of the PCI-E x1 slot. Or cut the card.

I'm hoping that neither of those are the case.

@ Tambro4, could i see a picture of the guts of your rig?
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post #8 of 17
this could prove to be an interesting thread...
    
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post #9 of 17
Quote:
Originally Posted by x7337H View Post
this could prove to be an interesting thread...
Now what makes you say that?
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post #10 of 17
Quote:
Originally Posted by Grafixs View Post
Specs:

1 x PCI Express x16
1 x PCI Express x1
2 x PCI

That's why, your mobo is not a Crossfire mobo. Sorry but those speeds will remain, you should just take out one of your 3870's for better performance.
w t f? Dude, he's got one card--no idea where that came from...

So, what makes you think it's running in 8x mode? Do you have a CPU-Z or GPU-Z screenshot? Also, there may or may not be an option in the BIOS to specify the speed of your PCI-E x16 slot--some do, some don't. Check that out.

There *might* (imho likely) be a reduction in performance. Check out this article on Toms Hardware about the effect of PCI-E speed on the card: http://www.tomshardware.com/reviews/...is,1572-8.html
It's interesting.
Edited by guyladouche - 6/17/08 at 10:07pm
    
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