820-2914-B gpu issue

[premtec]

So I had this with gpu issue after some time at OS.
Also VST was failing.
I did noticed that it was going too slow at gpu benchmark before it crashed.
I replaced 216-0810084 with 216-0810005 and after that I wasn't able to boot at OS.
I placed a second good one 216-0810005 [I know that from this bash all chips where ok] and I have same problem.
ASD EFI reports no issues.
It cannot boot also with a USB OS installation disk, after a while it shows the gray screen.
So my question as my chips are fine for sure, can it be this problem from VRAMs?


At this modeL I never touch the VRAM straps when replacing the 216-0810084 with 216-0810005 as they work as they are.

 

[Gurmon]

Replace with 216-0810001.

 

[premtec]

216-0810001 cannot be found new,
so far 216-0810005 6750HD can replace the 216-0810084 6770HD without issue
should I waist time with vram?

 

[dukefawks]

You cannot just replace a 0084 with a 0005. Get the correct chip to resolve this issue.

 

[premtec]

For your Information I reballed the VRAMs and that solved my problem, now systems boots OS and runs benchmark properly.
That is being done with 216-0810005 that works as a perfect replacement of the 216-0810084 [6750HD instead of 6770HD].
The 216-0810084 & 216-0810001 are impossible to be found new.

I just have to notice that the purpose of the forum is to make a suggetion or to prompt us to make a try to solve our problem and not make us quit for a part that doesn't exist any more.

 

[dukefawks]

I just bought 30 of these chips last week. If you find to right agent they will be able to still get these chips.
I am just saying that you cannot always just slap a 0005 on a 0084 board. I some cases it will work and in some cases you will need to change strapping resistors. In fact you should always change strapping resistors like R8613 etc. Compare boards and see how they differ.