Using voltage glitching to unleash the A100 in my mining card

Re:Using voltage glitching to unleash the A100 in my mining ... by samlinnfer on Wednesday November 11, 2026 @07:18AM (#50452560)

Before you get too excited about the CMP 170HX, the prices had already skyrocketed and that card doesn't a cooler on it and is designed for a server cooler that sounds like a jet engine. Also most of the 80GB vram unlocks have bad RAM and that is the reason they were locked in the first place, otherwise they would have became A100s.

Anyways, that's what I tell myself as I taste my bowl of sour grapes.

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Re:Using voltage glitching to unleash the A100 in my mining ... by whizzter on Wednesday November 11, 2026 @08:02AM (#50452905)

Yeah, cooling AND underclocking will probably be required to somewhat safely operate these.

That said, 80G for something that you picked up for cheap could be an absolute steal these days.

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Re:Using voltage glitching to unleash the A100 in my mining ... by roger_ on Wednesday November 11, 2026 @08:13AM (#50453011)

No need for underclocking, though power limiting doesn't sacrifice much performance.

Currently listening to the soothing drone of my $200 Octominer cooling my cards while I'm fine tuning a model (almost makes a good space heater).

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Re:Using voltage glitching to unleash the A100 in my mining ... by segmondy on Wednesday November 11, 2026 @09:59AM (#50454261)

I run mine in octominer too, with fan control too. No noise, did fine during the winter with heat and it's very comforting as we enter winter.

https://www.reddit.com/r/LocalLLaMA/comments/1wjr59t/768gb_v...

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Re:Using voltage glitching to unleash the A100 in my mining ... by roger_ on Wednesday November 11, 2026 @10:31AM (#50454605)

Yeah the fan noise is only noticeable when I push the cards to ~180W, otherwise they idle pretty quiet.

How are you dealing with the RAM limit (32GB)? I had upgraded mine to an i7 but it was unstable so I’m back to the stock Celeron class CPU.

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Re:Using voltage glitching to unleash the A100 in my mining ... by segmondy on Wednesday November 11, 2026 @03:21PM (#50458131)

I'm not using octominer MB or CPU. That MB on my octominer case is running everything, it's an epyc cpu with 512gb of dram. octominer is also pcie limited, i get faster pcie lane with this.

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Re:Using voltage glitching to unleash the A100 in my mining ... by roger_ on Wednesday November 11, 2026 @08:10AM (#50452984)

I sensed the sour grapes :D

Bad RAM isn't a huge issue as you can flag and ignore the relevant regions and be down a few MB.

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Re:Using voltage glitching to unleash the A100 in my mining ... by r_lee on Wednesday November 11, 2026 @08:52AM (#50453429)

I remember looking at research n thinking if they'd be useful for AI with their integer ops

I even looked into blog posts of using them or unlocking them somehow but I never thought to think that they actually had the full HBM memory and all just fused away??? wow

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Re:Using voltage glitching to unleash the A100 in my mining ... by NoidFonsense on Wednesday November 11, 2026 @03:15PM (#50458060)

Here is where I get to smugpost about how I bought a ton for $800 each, against the disgresion of my friends and claude who did not believe in the exploit...

After which I sold most of them for $2000-$2600 (I believed the panic about the new mac studio launch) instead of holding them to sell for like $5k and making my annual income in a week. And also I failed to do the capacitor mod after buying a couple hundred in soldering equipment. But at least I sold most of them for monero, and that's gone up since and allowed me to avoid massive ebay fees.

The moral of the story here is that you can fantisize about getting in at the bottom, but even if you did you may not have rode it to the top. Plenty of people bought bitcoin when it was half a cent and sold at the local maxima to net $30k and spent it on a used corrolla.

I think my story may make your grapes less sour.

Edit: I knew at the time of purchase that the 10GB->80GB unlocks were problematic but the 8GB->64GB cards were solid. The pricing reflects this, so thats just skill issue.

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Re:Using voltage glitching to unleash the A100 in my mining ... by Foobar8568 on Wednesday November 11, 2026 @03:40PM (#50458368)

And it has been a while they have been unlocked too, at least from August https://korben.info/en/nvidia-cmp-170hx-vram-unlocked-firmwa... ... https://github.com/amoghmunikote/cmpunlocker

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Re:Using voltage glitching to unleash the A100 in my mining ... by Roark66 on Thursday November 12, 2026 @10:24AM (#50468906)

Buying modded rtx 2080ti (22gb) still seems a good deal as long as you go to the source. It is a very nice card for the money. Around half of capability of rtx3090 for a third of the price.

As for v100, p100 etc I considered them, but they make zero sense as they don't have int8/int4. Everything gets upscaled in them which slows the inference down.

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