VBIOS Flash changed the VRAM brand and now oc is unstable

[Ozzer]

I have an RX 7900 XTX Nitro+ and its oc VBIOS is 022.001.002.024.000001, I tried to flash a newer VBIOS: the 022.001.002.034.000001. After that the GPU-Z's VRAM report changed from Hynix to Samsung and my VRAM oc became unstable. I flashed back the old VBIOS but the problem is still there. Idk what to do to fix the problem.

 

[VuurVOS]

I have an RX 7900 XTX Nitro+ and its oc VBIOS is 022.001.002.024.000001, I tried to flash a newer VBIOS: the 022.001.002.034.000001. After that the GPU-Z's VRAM report changed from Hynix to Samsung and my VRAM oc became unstable. I flashed back the old VBIOS but the problem is still there. Idk what to do to fix the problem.

View attachment 358912

Which program do you use for overclocking? AMD Adrenalin control panel? Did you run DDU?

 

[Ozzer]

Which program do you use for overclocking? AMD Adrenalin control panel? Did you run DDU?

Yeah AMD Adrenalin control panel and yes I've already run DDU

 

[529th]

Is GPUz the latest? Maybe try a different revision. Either that or remove the VRAM heatsink and verify the ram type

 

[R-T-B]

Uh... flash the old vbios? You don't update them based on version info like other parts. Versions can be for different vram types and entirely incompatible. Its why you aren't supposed to flash it unless you know what you are doing or a manufacturer tells you to. You can and will break things.

 

[Ozzer]

Is GPUz the latest? Maybe try a different revision. Either that or remove the VRAM heatsink and verify the ram type

Yes it is the 2.59. Checking directly on the VRAM ofc is the best move but after I verified that it is in fact Hynix what should I do? xd

 

[Ozzer]

Uh... flash the old vbios? You don't update them based on version info like other parts. Versions can be for different vram types and entirely incompatible. Its why you aren't supposed to flash it unless you know what you are doing or a manufacturer tells you to. You can and will break things.

The VBIOS was taken from a RX 7900 XTX Nitro+ like mine and it is compatible with both Hynix and Samsung memory. I've already flashed the old VBIOS

 

[Assimilator]

I flashed back the old VBIOS but the problem is still there

That's not how any of this works.

 

[Ozzer]

That's not how any of this works.

Yeah, I'm ignorant in this field, if someone more expert than me can give help would be nice

 

[VuurVOS]

The VBIOS was taken from a RX 7900 XTX Nitro+ like mine and it is compatible with both Hynix and Samsung memory. I've already flashed the old VBIOS

Is the "old vbios" a backup you made yourself or did you just download one from the bios collection?

 

[Ozzer]

Is the "old vbios" a backup you made yourself or did you just download one from the bios collection?

it is a backup i did from the original VBIOS

 

[3x0]

Turn off the PC and switch to the 2nd BIOS on the card (it should have a selector/switch somewhere on the PCB). Check the problem again after switching

Also, @W1zzard GPUz reports the GCD size for the 7900 XTX but reports Die size (GCD + MCD) for the 7800XT

According to the first screen and this one, the 7800 XT is bigger than 7900 XTX

 

[Rafael.luc]

Normally a video card model can have up to 3 different Bios, each one for a memory manufacturer, you updated to a Bios with Samsung memory.

Your bios is probably in protection mode, try returning to the original bios using AMDVBFlash

https://www.techpowerup.com/download/ati-atiflash/

 

[Ozzer]

Turn off the PC and switch to the 2nd BIOS on the card (it should have a selector/switch somewhere on the PCB). Check the problem again after switching

Also, @W1zzard GPUz reports the GCD size for the 7900 XTX but reports Die size (GCD + MCD) for the 7800XT

According to the first screen and this one, the 7800 XT is bigger than 7900 XTX
View attachment 358994

Yeah already tried, that bios says samsung memory too

 

[3x0]

Yeah already tried, that bios says samsung memory too

Well, unless you flashed both BIOS profiles on the card (Performance/Quiet), then I'd say you always had the Samsung BIOS.

What programs did you use for testing VRAM stability before/after the flash?

 

[Ozzer]

Well, unless you flashed both BIOS profiles on the card (Performance/Quiet), then I'd say you always had the Samsung BIOS.

What programs did you use for testing VRAM stability before/after the flash?

It's very unlucky that I don't have a screenshot of GPU-Z before the flash but I swear it was Hynix.
For the stability every time I played CS2 after the flash the pc would reboot itself, that only went away lowering the VRAM frequency

 

[3x0]

How long did you play CS2 before the flash to conclude VRAM OC is stable? Don't get me wrong, but these cards can be very finicky for OCing, and there's a possibility you never were 100% stable to begin with. What is/was the VRAM OC frequency?

 

[Ozzer]

How long did you play CS2 before the flash to conclude VRAM OC is stable? Don't get me wrong, but these cards can be very finicky for OCing, and there's a possibility you never were 100% stable to begin with. What is/was the VRAM OC frequency?

i think enough and btw after the flash just alt-tabbing out caused crashes, it never happened before
Edit: VRAM Frequency OC: 2764 (2750) with fast timings enabled

 

[Ruru]

VBIOS isn't a driver which needs updating.

 

[eidairaman1]

i think enough and btw after the flash just alt-tabbing out caused crashes, it never happened before

You screwed up, RMA your card and NEVER DO THIS AGAIN!

 

[Ozzer]

You screwed up, RMA your card and NEVER DO THIS AGAIN!

i don't think they accept RMA for overclocking instability lol

 

[eidairaman1]

i don't think they accept RMA for overclocking instability lol

Factory OC is advertised to reach that (Turbo Mode) since it's unstable you can RMA, Contact Althon Micro/Sapphire and stop screwing with the bios of your cards, it's not necessary to flash them anymore.

 

[Zach_01]

Factory OC is advertised to reach that (Turbo Mode) since it's unstable you can RMA, Contact Althon Micro/Sapphire and stop screwing with the bios of your cards, it's not necessary to flash them anymore.

Its about VRAM speed, not the GPU.

i think enough and btw after the flash just alt-tabbing out caused crashes, it never happened before
Edit: VRAM Frequency OC: 2764 (2750) with fast timings enabled

Why do you need so high speed on VRAM. Its not that the GPU is bandwidth bottlenecked with 960GB/s
The default is 2500MHz (2487)
I never even tried to test mine above 2700MHz. Now I never run above 2614MHz (2601) because it does not need it.
Let alone that "CPU Memory Junction Temperature" is climbing above 80C and I do not like it.

Never flashed mine, never will
This is the Performance BIOS with my settings from drivers and I keep timings at default (not Fast)