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[VC] AMD Radeon RX Vega 56 gets faster with Vega 64 BIOS

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#24 ·
So I tried the water bios on my 64 with block. It is ropey, clocks all over the place.

Going back to the air cooled bios. Much better. Seen some spikes maybe 30w higher than max air bios, but were just spikes and the clocks all over the place.

Something not right imo.

Sapphire air. Bios was aio sapphire.
 
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Discussion starter · #25 ·
Quote:
Originally Posted by kevinf View Post

Vega64 overclocks like a champ if you can keep it cool. I've played games at 1900Mhz stable. How fast are you guys getting overclocking yours?
Click to expand...
people clarified that Vega64 hardly reaches 1700mhz , anything higher is just wrong readings
 
#26 ·
Quote:
Originally Posted by kx11 View Post

people clarified that Vega64 hardly reaches 1700mhz , anything higher is just wrong readings
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I'd say most can hit 1700mhz. Just tried the water aio bios and hit 1725 with the stock clocks set to 1750. I'd say lucky to hit 1750, high 1700s golden chip.
 
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#27 ·
Highly unlikely anything is being unlocked. The performance increase is coming from a higher power limit and higher clocks, which are likely holding higher than most Vega 64 samples in practice because of the disabled CUs (at the same power limit 56 CUs should be faster than 64 in most cases, because Vega is not shader limited).

Overclocking should improve as well because of the increase in memory voltage with the Vega 64 fimware vs. Vega 56.

All of this can be achieved without replacing the firmware on the Vega 56, but a bios flash does make it simpler.
Quote:
Originally Posted by ilmazzo View Post

.... if vrm are weaker than 64 ref and tdp has been increased you can have some out-of-schedule fireworks in your case......
Click to expand...
All reference Vega models use the same VRM and the VRM is extremely robust.

You'll melt the PCI-E power connectors before you reach the VRM's limit, and probably trip OCP on the PSU well before either.
Quote:
Originally Posted by Newbie2009 View Post

So I tried the water bios on my 64 with block. It is ropey, clocks all over the place.

Going back to the air cooled bios. Much better. Seen some spikes maybe 30w higher than max air bios, but were just spikes and the clocks all over the place.

Something not right imo.

Sapphire air. Bios was aio sapphire.
Click to expand...
The AIO firmware has significantly lower temperature limits that will result in more throttling if cooling is not improved.
 
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#28 ·
Quote:
Originally Posted by Blameless View Post

Highly unlikely anything is being unlocked. The performance increase is coming from a higher power limit and higher clocks, which are likely holding higher than most Vega 64 samples in practice because of the disabled CUs (at the same power limit 56 CUs should be faster than 64 in most cases, because Vega is not shader limited).

Overclocking should improve as well because of the increase in memory voltage with the Vega 64 fimware vs. Vega 56.

All of this can be achieved without replacing the firmware on the Vega 56, but a bios flash does make it simpler.
All reference Vega models use the same VRM and the VRM is extremely robust.

You'll melt the PCI-E power connectors before you reach the VRM's limit, and probably trip OCP on the PSU well before either.
The AIO firmware has significantly lower temperature limits that will result in more throttling if cooling is not improved.
Click to expand...
yeah it's not the cooling, something else up.
 
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#29 ·
Is anyone really surprised? We've seen this BIOS flashing scenario a number of times, most recent of which being with the 480s.. it's a loophole AMD leaves behind on purpose (and one for which low/mid-tier consumers should be thankful for).

Not trying to downplay its importance btw, just saying that i'm sure most of us expected something like this?
 
#30 ·
Quote:
Originally Posted by Aenra View Post

Not trying to downplay its importance btw, just saying that i'm sure most of us expected something like this?
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Vega is the first AMD GPU line that doesn't allow firmware modding, so being able to flash even official firmware from other SKUs is something of a surprise.

It's also not as useful as actually being able to modify the firmware.
 
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#31 ·
Quote:
Originally Posted by Blameless View Post

Vega is the first AMD GPU line that doesn't allow firmware modding, so being able to flash even official firmware from other SKUs is something of a surprise.

It's also not as useful as actually being able to modify the firmware.
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Yep

Strange

I can see why to disable at this point bios modding but I think for now is more important software to catch up woth vega and to have the "sword of a thousand truths" crimson release with all the gingles enabled

Rtg by my side has time til december month more month less

1700 mhz an amd gpu? A year ago I would laugh
 
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#32 ·
While it doesn't unlock stream processors, is it possible that the extra compute units are getting unlocked (56->64)? I read of that being the supposed bottleneck.
 
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#33 ·
Quote:
Originally Posted by Newbie2009 View Post

So I tried the water bios on my 64 with block. It is ropey, clocks all over the place.

Going back to the air cooled bios. Much better. Seen some spikes maybe 30w higher than max air bios, but were just spikes and the clocks all over the place.

Something not right imo.

Sapphire air. Bios was aio sapphire.
Click to expand...
I thought the Sapphire LC BIOS was the most stable and gives you the highest clocks?
 
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#34 ·
Quote:
Originally Posted by schmotty View Post

While it doesn't unlock stream processors, is it possible that the extra compute units are getting unlocked (56->64)? I read of that being the supposed bottleneck.
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A CU is a collection of stream processors and TMUs. If you unlock a CU, you also unlock stream processors.

You were probably thinking of ROPs, which likely are one of Vegas bottlenecks, but both Vega 64 and 56 have 64 ROPs and there are no more to enable.
 
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#35 ·
Quote:
Originally Posted by tpi2007 View Post

The Vega 64 BIOS should indeed allow the GPU to draw more watts as reference Vega 56 is locked to 300w.
Micron does not make HBM or HBM2, that is a reporting mistake. Vega 64 uses Samsung HBM2 and Vega 56 reportedly uses SK Hynix exclusively.

And yes, the voltage is reportedly different, at 1.35v for Samsung's HBM2 clocked at 1.89 Gbps in Vega 64 and 1.3v for Hynix's lower clocked 1.6 Gbps HBM2 in Vega 56.
Click to expand...
I'm probably wrong, but it seems at least both Vega 56 and Vega 64 from AMD has the same HBM2 from Samsung.

https://www.techpowerup.com/vgabios/194443/amd-rxvega56-8176-170730
https://www.techpowerup.com/vgabios/194441/amd-rxvega64-8176-170719
 
#36 ·
Quote:
Originally Posted by ilmazzo View Post

Yep

Strange

I can see why to disable at this point bios modding but I think for now is more important software to catch up woth vega and to have the "sword of a thousand truths" crimson release with all the gingles enabled

Rtg by my side has time til december month more month less

1700 mhz an amd gpu? A year ago I would laugh
Click to expand...
Yes well it's not going to help me! I use it in a hackintosh, so no crimson or overclock methods. I got an EK waterblock for it so have heaps of headroom now. Max temps are like 43deg
biggrin.gif

Hopefully someone will figure out a way to mod the bios at some point.
 
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#37 ·
Quote:
Originally Posted by Rei86 View Post

I thought the Sapphire LC BIOS was the most stable and gives you the highest clocks?
Click to expand...
First time I posed about it so must be someone else you're thinking of.
 
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#38 ·
Quote:
Originally Posted by Newbie2009 View Post

First time I posed about it so must be someone else you're thinking of.
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Nah just been reading the Vega owners forums and the BIOS analyses thread and looks like the AIO BIOS is working out best for everyone when trying to get the 'highest' stable clocks on these cards.

Mine is still in my package and I'm brand new to the world of AMD. So hopefully my card can stay stable steady when I start to play with it... need to order my EKWB asap too.
 
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#39 ·
Quote:
Originally Posted by Rei86 View Post

Nah just been reading the Vega owners forums and the BIOS analyses thread and looks like the AIO BIOS is working out best for everyone when trying to get the 'highest' stable clocks on these cards.

Mine is still in my package and I'm brand new to the world of AMD. So hopefully my card can stay stable steady when I start to play with it... need to order my EKWB asap too.
Click to expand...
TBH I've undervolted mine at stock clocks as the gains are small and the overclocking with current drivers is odd. Will check out how far I can push the card when drivers/wattman is a bit more mature.
 
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#40 ·
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