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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Hiya, Basically, i would like to know whats going on with this. If i buy a graphics card, a pci-e one, will it be ok in my pci-e slot which runs at 8x? Is there any noticeable difference? Will it work? What happens to my cards performance? Will its fillrate ...


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  #1  
Old 4th Aug 2007, 04:38
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Hiya, Basically, i would like to know whats going on with this.

If i buy a graphics card, a pci-e one, will it be ok in my pci-e slot which runs at 8x?
Is there any noticeable difference? Will it work?

What happens to my cards performance? Will its fillrate be halved or what?

Is it effectively an AGP with a different interface and thats all?

Whats going on with it?

Ant...
  #2  
Old 4th Aug 2007, 05:31
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Hi Antony.

Put your mind at rest fella. I've yet to see a gpu fill the bandwidth provided by a 8x socket, whether AGP or PCI-E.

PCI-E was touted as all singing all dancing upon it's release because motherboard manufacturers wanted to do away with AGP.

That's it, pure and simply.
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  #3  
Old 4th Aug 2007, 13:07
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Hi Alex correct me if I'm wrong but if you get a card designed for 16x PCI=E it won't physically fit a 8x slot.Not 100% on this but thats what I understand. If it's an 8x card it will be ok in a 16x slot just using 8 lanes of the available 16.
  #4  
Old 4th Aug 2007, 15:02
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Its a 16x card and its a 16x slot, but apparently the slot runs at 8x. Ant...
  #5  
Old 4th Aug 2007, 15:50
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Hi guys, sorry was looking at it purely from a bandwidth point of view from my initial read of the post.

Whats the mobo make/model Antony?
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  #6  
Old 4th Aug 2007, 16:01
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Hiya, Ive got a Gigabyte M61PM-S2 (rev 2). and ive bought a sparkle 256mb nVidia 6600GT. Ant...
  #7  
Old 4th Aug 2007, 16:51
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Quote:
Originally Posted by sirantonycartwright View Post
Hiya, Ive got a Gigabyte M61PM-S2 (rev 2). and ive bought a sparkle 256mb nVidia 6600GT. Ant...
Your pci-e slot on the mobo is a 16x slot Antony, so I don't understand your initial post (?)

The card is a bog standard 16x pci-e card.

It'll work.
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  #8  
Old 5th Aug 2007, 03:25
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

Quote:
Originally Posted by alex View Post
Your pci-e slot on the mobo is a 16x slot Antony, so I don't understand your initial post (?)

The card is a bog standard 16x pci-e card.

It'll work.
I know, it is confusing.
My mobo has a 16x slot, right?
However, it runs at 8x so even though a 16x card will fit, it will only run at max of 8x.
The card ive bought is a 16x.

Do you know what i mean?
  #9  
Old 5th Aug 2007, 03:31
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

See this:
http://www.sharkyforums.com/showthread.php?p=2477754
  #10  
Old 5th Aug 2007, 06:59
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Default Mobo's PCI-E (16x) running at 8x, compatibility and performance issues?

[quote=sirantonycartwright;23623]
However, it runs at 8x so even though a 16x card will fit, it will only run at max of 8x.
quote]

Where did you obtain this info from Antony?

Have you checked the bios just to confirm the pci-e is set at 16x ?
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