666W VBios 4090 for Science

OolongGoat · Jan 11, 2025

Sooo I decided to mess around with the Galax 666W VBios for the 4090 last night.

Backed up my current one and then flashed.

I was happily surprised that I was able to pull that much power through my 3-pin to 12VHPWR cable.

Though I would admit it didn't do anything other than make the card run hotter than it was before. Maybe 1-2% increase in performance for 25%+ power increase...

On my stock VBios, I would occasionally see 400W and my core clock would be between 2950-3025Mhz full boost... With the Galax VBios I could get get up to 3075-3125Mhz... but it was pulling 600W-650W.

The temperatures were drastically different.... my 10C delta between core and hotspot (typically 55C-65C, respectively) shot up to a 20C delta (75C-95C) when using the Galax VBios....

Yeah, it definitely isn't worth it, and I put my stock VBios back in place. I also watched a couple YouTube videos for the giggles to compare.

Please.... my fellow 4090 owners.... Just leave it alone, it isn't worth the extra heat and wear on the card. Use the Nvidia/MSI OC Scanner and enjoy...

eidairaman1 · Jan 11, 2025

kiddagoat said:
Sooo I decided to mess around with the Galax 666W VBios for the 4090 last night.

Backed up my current one and then flashed.

I was happily surprised that I was able to pull that much power through my 3-pin to 12VHPWR cable.

Though I would admit it didn't do anything other than make the card run hotter than it was before. Maybe 1-2% increase in performance for 25%+ power increase...

On my stock VBios, I would occasionally see 400W and my core clock would be between 2950-3025Mhz full boost... With the Galax VBios I could get get up to 3075-3125Mhz... but it was pulling 600W-650W.

The temperatures were drastically different.... my 10C delta between core and hotspot (typically 55C-65C, respectively) shot up to a 20C delta (75C-95C) when using the Galax VBios....

Yeah, it definitely isn't worth it, and I put my stock VBios back in place. I also watched a couple YouTube videos for the giggles to compare.

Please.... my fellow 4090 owners.... Just leave it alone, it isn't worth the extra heat and wear on the card. Use the Nvidia/MSI OC Scanner and enjoy...

Hey put your stock bios back on and gpu-z screenshot it, i want to see a few details of it.

666w is like co2 or ln2 territory

ShrimpBrime · Jan 11, 2025

Well yeah, Galax GPUs are usually binned specifically for their cards higher tier. I'd expect no less from it

OolongGoat · Jan 11, 2025

@eidairaman1 Here you go

eidairaman1 · Jan 11, 2025

kiddagoat said:
@eidairaman1 Here you go

View attachment 379496

Yeah i found 2 of your files in the collection 480W is your max, pg 139 sku 330 is the board part number, you can always try the liquid cooled msi card bios in the 4090 range which has like a max of 520W.

And thank you for being logical about this, many do a flash and then wonder why their fans run faster or the card starts throttling to try and not go super nova

Solaris17 · Jan 11, 2025

kiddagoat said:
Sooo I decided to mess around with the Galax 666W VBios for the 4090 last night.

Backed up my current one and then flashed.

I was happily surprised that I was able to pull that much power through my 3-pin to 12VHPWR cable.

Though I would admit it didn't do anything other than make the card run hotter than it was before. Maybe 1-2% increase in performance for 25%+ power increase...

On my stock VBios, I would occasionally see 400W and my core clock would be between 2950-3025Mhz full boost... With the Galax VBios I could get get up to 3075-3125Mhz... but it was pulling 600W-650W.

The temperatures were drastically different.... my 10C delta between core and hotspot (typically 55C-65C, respectively) shot up to a 20C delta (75C-95C) when using the Galax VBios....

Yeah, it definitely isn't worth it, and I put my stock VBios back in place. I also watched a couple YouTube videos for the giggles to compare.

Please.... my fellow 4090 owners.... Just leave it alone, it isn't worth the extra heat and wear on the card. Use the Nvidia/MSI OC Scanner and enjoy...

I flashed mine back after playing with the galax bios, even ran the release 600w bios instead of the patched (post release updated) bios for my card (530w) for awhile. just wasnt worth tbh. now im sitting on post release vbios; just wasnt worth it.

arbiter · Jan 11, 2025

Yea there is a point with processors that you need many double digit % in power to get single digit boosts.

Macro Device · Jan 11, 2025

10 FPS for +60% wattage. This overclocking is not worth it anymore no matter the brand, the make, anything. Enjoy your mighty GPU!

tpuuser256 · Jan 15, 2025

What's the bottleneck ? Iirc the 4090 is bandwidth starved

eidairaman1 · Jan 15, 2025

There is a point of diminishing returns with overclocking

damric · Jan 15, 2025

@neurotix has a story to tell about doing this

phanbuey · Jan 15, 2025

Undervolt and overclock with these cards seems to be the best way to go

freeagent · Jan 15, 2025

I don't even touch the voltage on my GPU's, I just give it all the boost and mem speed that it will take before becoming unreliable.

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666W VBios 4090 for Science

OolongGoat

eidairaman1

The Exiled Airman

ShrimpBrime

OolongGoat

eidairaman1

The Exiled Airman

Solaris17

Super Dainty Moderator

arbiter

Macro Device

tpuuser256

eidairaman1

The Exiled Airman

damric

phanbuey

freeagent

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