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Using voltage glitching to unleash the A100 in my mining card
334 points130 comments4.1 average comments/hourSubmitted by lae
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amazing to think there was a time (literally not too long ago) where you would throw 80 GB of HBM onto a chip and turn 90% of it off
Comment on Hacker News · 3 direct repliesInstead of putting the host to ACPI S3 state, could an external PCIe riser be used with a separate power supply? Seems like that would considerably speed up the process, by letting the host continue to run while only the target cycles.
Comment on Hacker NewsThis is great. I’m actually trying to unlock the 80G in a CMP 170HX the software way for the last 2 weeks (still no luck). I just don’t know if I’m brave enough (and knowledgeable enough) to go this blown fuses way. Seems a lot more risky. P.S. I now see this is for the 8GB model, which is insane. The 10G one is the one that until now was proven to have 80G, but never fully accessible through CUDA (it was accessible using CPU memory copy though - much slower).
Comment on Hacker News · 1 direct repliesBut what if nvidia used those fuses because an A100 had too many fabrication faults so it could only be a cheaper mining card? (which is the more likely scenario because they can make much more money on enterprise/datacenter products, see DRAM)
Comment on Hacker News · 9 direct repliesSadly all those cards on the market are now priced for 80gb of ram regardless if it works on them or not.
Comment on Hacker NewsIf someone wants to build a local AI GPU farm today, should they go out and buy a bunch of these? Or has the price already gone up too much to make it a good deal and is the "yield" you'd get (from things like bad segments of RAM, unreliability of the unlocks, SM lottery, etc.) too inconsistent?
Comment on Hacker News · 3 direct repliesGlad I jumped on these cards, excited to give this a try! Hard to believe $1k was a deal a few months ago (and $200 before then).
Comment on Hacker News · 1 direct repliesI just wish they had something like this for older Tesla p100s, p4s...
Comment on Hacker News · 1 direct repliesConsidering how unobtainium GPUs have become nvidia could get a PR win by publishing unlocks for all their outdated hardware. ... people are figuring it out anyways, might as well embrace it.
Comment on Hacker News · 2 direct repliesGreat usage of glitching!
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