Flashing Sapphire Radeon RX 6950XT toxic limited edition bios on Sapphire RX 6900XT Toxic Limited edition?

GilgameshIQ · 12 May 2022 at 07:53

Hi All,

I'm wondering if someone is able to shed some light on this. I currently have a Sapphire 6900XT Toxic Limited edition. After watching a few reviews of the 6950XT do you think it's possible to flash my 6900XT with the 6950XT Bios? They seem identical. Below are the links from Techpowerup

6900XT - https://www.techpowerup.com/gpu-specs/sapphire-toxic-rx-6900-xt-limited-edition.b8697

6950XT - https://www.techpowerup.com/gpu-specs/sapphire-toxic-rx-6950-xt-limited-edition.b9633

LtMatt · 12 May 2022 at 09:15

GilgameshIQ said:
Hi All,

I'm wondering if someone is able to shed some light on this. I currently have a Sapphire 6900XT Toxic Limited edition. After watching a few reviews of the 6950XT do you think it's possible to flash my 6900XT with the 6950XT Bios? They seem identical. Below are the links from Techpowerup

6900XT - https://www.techpowerup.com/gpu-specs/sapphire-toxic-rx-6900-xt-limited-edition.b8697

6950XT - https://www.techpowerup.com/gpu-specs/sapphire-toxic-rx-6950-xt-limited-edition.b9633

I very much doubt it and would not recommend it.

JediFragger · 12 May 2022 at 09:16

No way, won't take that memory speed.

GilgameshIQ · 12 May 2022 at 09:47

JediFragger said:
No way, won't take that memory speed.

Surely the memory will be able to be overclocked by using MorePowerTool no?

JediFragger · 12 May 2022 at 09:50

GilgameshIQ said:
Surely the memory will be able to be overclocked by using MorePowerTool no?

It's too fast, I'd let someone else do it first tbh.

JediFragger · 12 May 2022 at 09:51

Your thoughts @LtMatt ?

Harlequin · 12 May 2022 at 10:14

Pretty sure the ram wont hit the base rate of 2250 for the 6950XT version

GilgameshIQ · 12 May 2022 at 10:22

Harlequin said:
Pretty sure the ram wont hit the base rate of 2250 for the 6950XT version

I'll try once I'm home and report back

LtMatt · 12 May 2022 at 10:23

I don't think it will work @JediFragger.

GilgameshIQ · 12 May 2022 at 10:36

LtMatt said:
I don't think it will work @JediFragger.

Have they just speed binned the memory?

LtMatt · 12 May 2022 at 10:40

GilgameshIQ said:
Have they just speed binned the memory?

That's a question for Sapphire.

humourme2 · 12 May 2022 at 10:51

I was looking into similar with the 6700 xt as a way of getting past the AMD memory upper limit. I got as far as identifying the GDDR6 chips used and their ratings (as expected, but dissapointingly, they reflect the recommended settings). These of course are guidelines and are (probably) minimums. As I have the 6700 Nitro+ the base/game/boost clocks are already at the 6750 or close enough. I can in the AMD software slide the memory to 2150 ... so I'm almost at 2250 ... there are plenty of reports of people doing the same, so it is likely that there is headroom there if it can be accessed. Any more than this I'd have to use MorePowerTool ... but as JediFragger said using a different board bios has its own risks, so I'd let someone else try it first, the lower risk route is to work with the existing bios. My card is new, so it is too soon to brick it.

humourme2 · 12 May 2022 at 10:54

GilgameshIQ said:
Have they just speed binned the memory?

On the teardowns for the 6700/6750 cards the memory chips are rated as 16 Gbps and 18 Gbps. So the minimums are higher in the new. What the maximums are is at the moment anyones guess.

Poneros · 12 May 2022 at 13:19

Seems like you'd be taking a big risk for what would amount to a 5% performance bump at best.

varkanoid · 12 May 2022 at 13:44

From what I've read its not a good idea especially when the difference is so small and can be achieved just about with overclocking.

Rexton · 12 May 2022 at 14:23

Actual hardcore overclocking on youtube confirmed the PCB design is different. I doubt a flash would work.

GilgameshIQ · 12 May 2022 at 15:39

Well this is what I was able to achieve on mine in terms of memory I didn't touch the core:

SpudMaster · 12 May 2022 at 16:41

I dont know about changes to the PCB or anything like that but I imagine the 6950xt bios give the vram more voltage to allow for the higher clocks. Like Vega 56's and 64's. My Vega 56 couldn't get the memory clock I run until I flashed it with a 64 bios

LtMatt · 12 May 2022 at 16:53

GilgameshIQ said:
Well this is what I was able to achieve on mine in terms of memory I didn't touch the core:

Nice arm!

Can you put up Hotspot/junction temperatures (in your overlay) and put up a video on YouTube?

GilgameshIQ · 12 May 2022 at 17:27

LtMatt said:
Nice arm!

Can you put up Hotspot/junction temperatures (in your overlay) and put up a video on YouTube?

There you go

- YouTube

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

www.youtube.com

I dont think it's fully stable at 2270MHZ