GA-MA790X-UD4P (PCI-E 16x crashes but PCI-E8x does not)

[theodrin]

Hello, I recently purchased a GTX 460 (768 MSI OC) and a brand new motherboard a Gigabyte GA-MA790X-UD4P. I'm running on Windows XP, with a AMD 720 Phenom processor and a 650W corsair PSU and 4gb of ram.

Now when I initially installed the card into the main PCI-E slot everything was working untill I try to start a game or 3d application (like nvidia control panel) and then my computer freezes.

So I reinstalled drivers, did driver sweep, did this all in safe mode etc and still nothing.

So I thought maybe this was a mobo problem so I installed all the drivers and flashed to the latest bios (F10A) . But still nothing, any game or 3d apllication just makes it freeze.

So I seated the GTX 460 into the second PCI-E slot the 8.0x one and it started up and the GPU was working during games and everything, but I imagine only at half the bandwidth and near the bottom of my case.

So does anyone have any tips or suggestions on why the main PCI-E 16x slot will not function with my GTX 460 768OC MSI card?

[absic]

Hi there and welcome to the forum.

I will need to do a bit more checking but I think I recall a similar situation on the forum and the problem was actually due to the Graphics Card being an Over-clocked Version like yours is.

Will dig around for you and update when I find the info.

[theodrin]

Thanks for your help Absic.

 I searched under the same motherboard name and I only found one guy having a problem with his PCI slots but it seemed that they made a buzzing noise on both slots for him, don't think it's related to this.

[theodrin]

Hello,

I bought the a/m mobo with Gigabyte GV-R435OC-512I and I noticed a high pitch/frequency buzz that comes from somewhere.
I disconnected the hard drive and the buzz was still there. I then took the GPU out and the noise was gone, which means - it has something to do with the GPU.
I then tested the mobo with another GPU and the same noise was there.
Last thing I did was to connect the GV-R435 to the second PCI Express slot and the noise is gone.

Anyone run into this before? Is there a problem with the mobo if the first PCI Express produce such a high pitch noise? The noise is so disturbing that it literally caused me a headache.

Will I be having issues if I am using the second slot with only one card?

Shall I RMA the board?

Thanks in advance for any advise.

this is the only thread i found related to the GA-MA790X-UD4P motherboard and video card problems.

[absic]

Well, I've just trawled through the whole of the AMD section of the forum and I can't find the topic but I am getting old and maybe I just imagined it..... Naaaah!

OK the first thing to try and establish would be is it the Graphics Card that is the problem or is it the PCIE X16 slot.

The only way to actually do that is to try another Graphics Card. Do you have a spare card or a friend that you can borrow one from?

[Dark Mantis]

Well, I've just trawled through the whole of the AMD section of the forum and I can't find the topic but I am getting old and maybe I just imagined it..... Naaaah!

What's the matter absic, the alzheimer's starting to kick in again? 

[absic]

Have you actually tried to find anything on this forum??

I know it's there and I'll track it down........

Sooooooo many threads

Sooooooo little time!

[Dark Mantis]

Seriously it is the one thing I find annoying about this forum and that is it is hard to find old bits of information. 

[theodrin]

Well I have another card a GTX260, but it's dead. I have no friends

I guess I will go to a computer repair shop and see what the problem is. I'm almost positive it's not the card because it worked fine and I played Starcraft II on the 8x slot for half an hour.

Thanks for your help guys, I will post back when I see what the problem was.

[Dark Mantis]

Have you checked to see what the setting s are in the BIOS for the graphics?

[theodrin]

optimized defaults, i messed around with the PEG and PCI setting but nothing, it's just back on optimized defaults

[absic]

Have you checked to see what the setting s are in the BIOS for the graphics?

To be honest there aren't that many settings that you can tweak for the Graphics on AMD boards at the moment.

optimized defaults, i messed around with the PEG and PCI setting but nothing, it's just back on optimized defaults

This doesn't surprise me and I think your original idea of taking it to a repair shop is probably the best way to go.

[Tiger]

Default setting for graphics is the PCI slot first.
PEG Sets the PCI Express graphics card on the PCIEX16_1 slot as the first display.

I would also check the memory settings, particularly the DRAM voltage. If it is crashing in 3D applications, you should run memtest86+ to test for defective memory.
http://www.memtest.org/
The Forum FAQ's will explain how to make a disk to run the program.

[theodrin]

100% pass on the ram front.
Tried another older ati card in the slot and it worked fine.
Repair guy was telling me it's a power issue but how can a 650w corsair not be enough for a GTX460 i don't know. might be a faulty psu...it has gone through lightning..

[Dark Mantis]

If it was an EMP (lightning) fault it would have destroyed your machine. The graphics cards now are very power hungry along with the motherboards and I think you would be surprised at how much they need. I can't honestly see the connection between the power and the different PCIe slots though.