System Restart Problems

[Admiral Huddy]

I have a PC that has been brought to me that appears to be having a few problems but before I start, here is the starting Spec:

Q6600,
AC 7
BioStar t power 45 i45 (latest BIOS)
2x 2gb Corsair PC2-6400
PNY 8800GT 256mb
Hitachi 500 GB HD.
Jeantech 450 PSU
Vista x64 Prem
Antec 300 3x12cm case fans


The system has been apparently dropping to desktop when playing games, although when I have tested this I don’t get any problems. However, I do get an error when running Futuremark 3Dmark06:

Idirect3DVertexBuffer9::Lock failed: n/a (Unknown)

Interesting because windows says that the driver has “Stopped working but has restarted”

This causes the application to freeze and goes back to desktop. I’m assuming this is the same problems the chap is experiencing during gaming.

Anyway, he also gave me a spanking new Powercolor HD4870 to upgrade to.

So I changed the PSU to A Seasonic 600w, removed the NIVIDIA drivers, ran driver sweeper, installed the new card fired up and then after about 20-30 seconds, the system just restarts and the monitor looses connection and after which just a blank screen. This happens even when I’m in the BIOS, so it can’t be a driver issue.

I tested the PSU and the rails look fine.. I then reinstalled the 8800GT with the PSU and everything was fine.. except I still get that “IDirect..” error when running 3dmark.

I’m at a loss where to go from here?


I have a dilemma here because I’m beginning to feel it’s a faulty motherboard but at the same time, I’m wondering if I have two faulty graphics cards. Has the chap been unlucky and been sent a duff HD4870 which is clouding the issue?

What is causing the “Idirect3DVertexBuffer9::Lock failed: n/a (Unknown)” error when the 8800GT is installed? I’ve searched Google and from what I’ve read, I’ve done everything that has been suggested, i.e. standard card/driver removal.

Other things i have tried is:

Memtest86.
Drive test
CPU test in UBCD
Temperatures are all fine.

Any help would be great.

Thanks

 

[Admiral Huddy]

The new HD4870 restarts even when in BIOS eliminating the drivers really.

 

[Admiral Huddy]

The other thing deff worth trying is resetting the CMOS/taking out the battery.

Have tried this along with a BIOS flash.

Dam skim reading

As Plec says try your own GPU in the system, and in each of the PCI-e slots.

Will try this.

..snip..

Yes this is my fear that I have two faulty cards. Unfortunately, the card in my rig has a water block and all my test cards require no aux power connections. They are just basic video cards. They appear to work ok but i don't feel this is an adequate test.

I have contacted a fellow PC technician to see if he can test the cards.

 

[Admiral Huddy]

JonJ, makes a good point - i've witnessed threads where a gfx slot has killed gfx card after gfx card.

I bet that's put your mind at ease...

Good luck!

the only contrary to this, is that the 8800GT card doesn't have the same problem.


Edit - I have just found a PC I have floating around.. Will a 400w PSU provide enough juice for the HD4870? Other bits incl E6320, Asus P5N-E, one optical and one 250gb HDD..

 

[Admiral Huddy]

Ok, I'll report back my findings.. I'll do a skeleton test too.

 

[Admiral Huddy]

update.. well the cards look fine. So it looks like RMA time for the mobo.

Thanks for your help Plec.