Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > My motherboard has a pci-e x16 slot, but the control panel says..

My motherboard has a pci-e x16 slot, but the control panel says..

Forum Graphic & Displays : Graphics Cards - My motherboard has a pci-e x16 slot, but the control panel says..

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johoz   07-05-2008 at 08:46:50 PM

I have a 8800gt and a motherboard with a pci-e x16 slot. For some reason on the control panel for my video card it says I have a x8 bus slot. Any reason why?

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spathotan   07-05-2008 at 08:47:17 PM
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What chipset is this?

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johoz   07-05-2008 at 08:51:59 PM
- 0 +

NVIDIA nForce650 SLI Chipset


I think it's that. I'm kinda scrub so let me know if that's not what you're looking for.

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EXT64   07-05-2008 at 08:52:32 PM
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Does it by any chance say 8x 2.0? For some reason my card is either detected as 16x or 8x 2.0. They are equivalent in bandwidth and my card is 2.0 compatible (but not my MB) so I guess it just gets confused. Try other scanning programs like PCWizard or GPU-Z.

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ausch30   07-05-2008 at 08:53:17 PM
- 0 +

What motherboard do you have?

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It is the mark of an educated mind to be able to entertain a thought without accepting it.
-Aristotle
 Reply to ausch30
johoz   07-05-2008 at 08:53:28 PM
- 0 +

nope just x8 bus.
Where could I get pcwizard or gpu-z?

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johoz   07-05-2008 at 08:54:53 PM
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it's dells xps 630

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spathotan   07-05-2008 at 08:56:22 PM
- 1 +

Well the Nforce 600 series does not support PCIe 2.0, but the 8800GT does. So running at 8x is running at 8x, PCIe 2.0 isnt even part of the equation because the board dosent support it. I used to have an EVGA 680i before I knew nvidia chipsets were bad news, and I remember in the BIOS you could adjust the speed betweeen 4, 8, and 16. Maybe go look for that.

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johoz   07-05-2008 at 08:58:32 PM
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nVidia’s 650i SLI chip set

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johoz   07-05-2008 at 08:59:34 PM
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Ok before I jump into my bios to look for the speed adjustment, any precautions should I consider? I've overclocked my processor to 3.0ghz from 2.4ghz so I am familiar with it

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spathotan   07-05-2008 at 09:00:39 PM
- 1 +

Well all you are looking for is bandwidth/speed adjustments for the PCIe, dont mess with anything else. I cant tell you where the setting would be unfortunately, but it should be in either Advanced, or onboard devices.


Message edited by spathotan on 07-05-2008 at 09:01:50 PM
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Intel Xeon X3370 @3.6ghz Under Enzotech Extreme-X,EVGA GTX 285 SC, 4GB Mushkin Ascent eVCI @ 1066mhz, Gigabyte P45 UD3P
 Reply to spathotan
ausch30   07-05-2008 at 09:07:40 PM
- 1 +

Dowload and run CPUZ, under the Mainboard tab at the bottom it has a box for Graphics Interface and it will show you what you card is running at and what the slot is capable of.

Message quoted 1 times
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It is the mark of an educated mind to be able to entertain a thought without accepting it.
-Aristotle
 Reply to ausch30
johoz   07-05-2008 at 09:08:00 PM
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Will increasing it (if i can) make my motherboard a lot hotter?

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johoz   07-05-2008 at 09:09:48 PM
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yea it's running at x8 but max supported is x16

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ausch30   07-05-2008 at 09:12:02 PM
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Do you have more than 1 PCI-E slot? it might be that 1 is 16x and 1 is 8x.

------------------------------
It is the mark of an educated mind to be able to entertain a thought without accepting it.
-Aristotle
 Reply to ausch30
johoz   07-05-2008 at 09:24:41 PM
- 0 +

no 2 pci-es x16


Message edited by johoz on 07-05-2008 at 09:26:05 PM
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johoz   07-05-2008 at 09:25:32 PM
- 0 +

uh how do I raise my slot to x16? the only thing I see involving my slots is a listing of both pci-e slots and they're at 100mhz, which can be raised or lowered

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johoz   07-05-2008 at 09:44:29 PM
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is the 100mhz thing the speed adjustments for my slot cards?

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ausch30   07-05-2008 at 09:45:41 PM
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There are no 650i boards with 2 16x PCI-E slots, the 650i chipset doesn't have enough lanes to support 2 cards @ 16x. When they list 2 x 16x PCI-E slots they are talking about the physical size of the slot not the speed. The 650i has either 1@16x and 1@8x or both @8x in SLI. Some boards are capable of switching the slots between 16x and 8x and some are set at a certain speed. The two slots on your board should be different colors which would identify 1 as 16x and the other as 8x.

The 100mhz is your PCI-E frequency leave it there.


Message edited by ausch30 on 07-05-2008 at 09:48:02 PM
------------------------------
It is the mark of an educated mind to be able to entertain a thought without accepting it.
-Aristotle
 Reply to ausch30
johoz   07-05-2008 at 09:48:50 PM
- 0 +

oh! ok. one is blue (the one my cards in) the other is black. i'll try switching and see what happens. thank you!

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spathotan   07-05-2008 at 09:55:22 PM
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Your card should be in the top port.

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 Reply to spathotan
Shadow703793   07-05-2008 at 09:59:08 PM
- 0 +

ausch30 wrote :

Dowload and run CPUZ, under the Mainboard tab at the bottom it has a box for Graphics Interface and it will show you what you card is running at and what the slot is capable of.


Also download GPUZ and check it out.

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johoz   07-05-2008 at 10:30:11 PM
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On gpu, where does it tell me that it's on the x16 bus?

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johoz   07-05-2008 at 10:32:37 PM
- 0 +

On ROP it says 16 (idk what that is
but on bus interface it says PCI-E 2.0 X16 @ 8

Message quoted 1 times
Reply to johoz
ausch30   07-05-2008 at 10:40:43 PM
- 0 +

johoz wrote :

On ROP it says 16 (idk what that is
but on bus interface it says PCI-E 2.0 X16 @ 8


ROPs (Raster Operator units) are units which perform various raster operations. More ROPs will lead to a higher fill rate (GPixel/s).

Did you switch the slots?

------------------------------
It is the mark of an educated mind to be able to entertain a thought without accepting it.
-Aristotle
 Reply to ausch30
johoz   07-06-2008 at 06:28:21 AM
- 0 +

wait do I have a pci-e 2.0 x16 slot or no?

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ausch30   07-06-2008 at 09:57:24 AM
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no

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It is the mark of an educated mind to be able to entertain a thought without accepting it.
-Aristotle
 Reply to ausch30
mactronix   07-06-2008 at 10:47:28 PM
- 0 +


Your card is meant to be in the blue one.
This is a full review of your board. http://www.xbitlabs.com/articles/m [...] e-sli.html

Mactronix :)

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