Very interesting issue/problem? GPU undervolting automatically, thus TDR!

Hi guys,
I have G53JW with GTX 460M. Using 314.22 drivers which i thought the most stable. Yep, on desktop and idle times, it's stable. And during 3D gaming i found a "unwanted" behaviour which is not good.

We and i all know dynamic voltage adjustment happens based on real-time GPU load as well as GPU clocks. GTX 460M with 314.22 has the lowest base voltage which is 0.8200v and 0.9700 as highest. Here are the screenshots below:

The details of GPU:


When PC is idle, light usage:


Under heavy load, until GPU temp reaches about 65 celcius:


Under heavy load, AFTER GPU temp goes above 65 (66+) degrees and more:


The problem starts here, my GPU needs to run at highest voltage (p-state) to prevent TDR during gaming. When the card starts to operate at 0.9200v, the games begin to crash due to relative lower voltage (with 0.9200) compared to must_have 0.9700v.

How can i prevent my GPU from switching voltage back to 0.9200 from 0.9700 after GPU temp goes above 65 celcius? Any comment is greatly appreciated.

 

The problem is that 0.97v is really an over volt and this can trigger the cards power protection. If it can't run stock at 0.92v then the card is faulty.

 

Really? Can you detail a bit more? Most of the times the GPU runs very stable, even prior to 314.22, i used to run with 301.42 and had no TDRs during gaming, however with 314.22, i get different voltages when compared to previous drivers. My VBIOS is the same and i haven't and won't have it updated.

You say 0.92v is normal?

 

If you search Google for the issue you can see many reporting the same changes in voltage.

 

I found this:
http://forum.notebookreview.com/asu...ified-overvolting-vbios-gtx460m-g73sw-37.html

However i have stock VBIOS/BIOS. I can't change and update it. So with current values, should it run OK with 314.22 along with 0.92v as P0 voltage state?

Sorry for getting a lot of confusion.

 

At stock it should be fine at 0.92v.

 

Could you maybe also use a newer GPU-Z version? Yours is quite old and a newer version might show more information, or more correct one.

 

Good spot, always best to use the latest version when trying to sort an issue.

 

I have almost the exact same laptop a G73SW.

The power supply began sparking, and soon the computer would not start.

I ordered a new mainboard which worked fine except it had no display. But the display worked fine through the external video, so I ordered a new LVDS cable and a new screen.

The new screen did not work either. Which means one of two things:

1. The replacement mainboard I ordered was faulty.

2. The video card is faulty (in such a way that external video works but the display does not)

I've tried all the battery, BIOS, cmos battery, power cycle, etc, all the tricks and have read every post anyone ever made about this machine. One thing to note is that the battery is completely dead.

I have repaired many computers but this is by far the worst I've ever dealt with. Mainly because the video is a separate board. The thing has no diagnostics, no error codes. There is no way to tell what the source of this problem is. I ran the ASUS diagnostics on the board and it turned up fine.

If you have any ideas about what is causing this blank display, I'd be glad to hear it.



I would have posted this review/complaint as a new thread but there is no button or method of doing that anywhere on this site.

 

I did it and downloaded 0.7, the latest GPU-Z implies the same results. I did under_load test and it its 0.97v until 65 celcius, and since 66 celcius it goes along 0.92v as steady under load.

Screenshots have been attached. Any ideas?

 

Likely the motherboard and the lvds chip.