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Flashed Vega 56 Pulse...

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post #1 of 3 (permalink) Old 01-03-2019, 11:03 AM - Thread Starter
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Flashed Vega 56 Pulse...

Hello Overclockers,
I want to tell you how I knocked out my Sapphire RX Vega 56 Pulse with a forced BIOS-Flash, by rising the power limit and running Furmark.

After over 8 years of using my old computer, I built my new system in the end of december and decided to go completely with AMD (RX Vega 56, R7 2700X).
I am very interested in benchmarking my new system and overclocking it, to see how far I can go. After many experiments I reached a point there I thought I couldn´t go higher because changing my GPU clock brought no performance improvements anymore. It couldn´t get to that frequency at load with a temperature under 65°C and I couldn´t go much higher than 980 MHz with my memory.
I was thinking it could be a power limit issue and with the intention to clock my memory higher, I tried out to flash a Vega 64 BIOS over my power saver BIOS yesterday.

I downloaded ATIFlash and used many BIOS versions which only gave me the error "Subsystem ID mismatch". After some time and reading I found out it was due to the Pulse custom design and that there was no Vega 64 version of it. Nevertheless I used the windows commandline with ATIFlash and force flashed the Sapphire Vega 64 Nitro+ BIOS on it.

After the first restart I just got a blackscreen on both monitors, used my standard BIOS again and retried with only 1 monitor plugged in - I got a picture and for GPU-Z my GPU was now a Vega 64 with all of it´s settings. I was even able to use both monitors now.
The first benchmark run looked promising and I nearly reached my maximum Vega 56 overclock. But this wasn´t enough for me, I decided to use the full potential by rising the power limit by 50% and running Furmark again. Maybe 2 seconds into benchmarking my PC got quieter and I lost the signal on both monitors, everything else in the system was still running. The fan wasn´t spinning anymore and the EZ debug VGA led was now lid on every startup.
After several reboots and testing I gave up and had a reason to go to bed.

Today after work I decided to look if I can find something that maybe got blown and I found 2 blown fuses near the PCI-e connectors. They looked normal like the third functioning one but there was no continuity. So I decided to just bridge both fuses with solder and some copper wire to test if it was the only thing that got damaged. I am now writing this post with my Vega of corse with stock BIOS, but have not tried it under load yet. I am planning to replace both fuses with equal ones, if I can find them for cheap.

Has anyone else experience with BIOS flashing the same type of card and tried to overclock it further? Do you know if other custom designs are fused too and if the fuses in my Vega are just there because the design can´t handle more power or if it just got fused by the expected power usage, but is capable of more?
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post #2 of 3 (permalink) Old 02-09-2019, 08:31 AM
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Congrats on the repair! I also have Vega 56 pulse but didn't flash for the reasons you stated such as custom PCB.

Wondering if its really necessary because you can get great results with modified powerplay. The only advantage I can see from Vega64 BIOS is the increased HBM voltage.

My GPU hits 1600Mhz in most games and 1580Mhz in Superposition while drawing around 175 watts.

I was able to get it to around 1680Mhz @1100mv but the extra power draw wasn't worth it for me.
Seems to me the temperature particularly the hot spot temperature is the limiting factor for this card.

What are your clock targets? Good luck with your overclocking.
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post #3 of 3 (permalink) Old 05-15-2019, 02:00 PM
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In case any of you guys feel confident enough, this is how I successfully flashed a Vega64 vBIOS compatible with our Pulse 56 nano PCB:


In space no one can hear you scream.
Ryzen 9 Rig
(18 items)
Ryzen 9 3900X
ASUS Crosshair VIII Hero X570
AMD Radeon RX 5700 XT 8GB. GDDR6 Sapphire Pulse
G.Skill 16GB (2x8) DDR4 3600MHz @3733 TridentZ F4-3600C15D-16GTZ
Hard Drive
Samsung 970 EVO Plus SSD M.2 NVMe PCI 1 TB.
Hard Drive
Samsung 850 EVO SSD SATA3 ACHI 1TB.
Hard Drive
Toshiba X300 SATA3 7200RPM 5TB.
Power Supply
Corsair RM-850 850W Fully Modular
Noctua NH-U12A
Corsair Obsidian 750D Airflow Edition
Operating System
Windows 10 x64 Pro for Workstations
LG UltraWide 34UC79G-B 34" Curved IPS 144Hz FreeSync
Logitech Gaming G513 Carbon
Logitech G903
ASUS ROG Stealth
Realtek ALC1220 + Logitech Z625 2.1 Speaker Set
Fan Cases: 5x Noctua NF-P14s Redux 140mm 1500 RPM PWM
APC Back 1400VA
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bios-flash , fuse , power limit , vega 56 pulse

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