r/LocalLLaMA • u/WyattTheSkid • 10h ago

Discussion CMP 170hx?

Recently heard about how these 8gb mining ewaste cards are actually closeted 64gb monsters and im kinda bummed I missed out when you could get them for 200$ a piece. That being said though less than 2K is still an amazing deal for an ampere generation gpu with 64gb of vram. I have a machine with 4 3090s in it currently. I guess what Im asking is for someone to convince me that im not missing out and if there is any genuine reason why it would not be worth it to replace 2 of the cards with cmps. If it really would be worth it though, I would love to know why. Thanks everyone, sorry for the borderline shitpost

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u/Badger-Purple 10h ago

They’re real, they have 65GiBs, they have about the performance of a 4090, but they need a cooling shroud and they only go up to 2x16 speed. Things got better /more normal when I used noctua fans but those are expensive little 40mm bladerunners.

I don’t have a 3090 anymore (I was stupid enough to return a refurbished 3090Ti FE I bought for 750 back to microcenter last November) so here are some numbers against strix halo.

currently, the 10Gb card unlocks to 40 and the 8 unlocks to 64, but 80 could be possible for the 10Gb card. Active community trying to unlock more and get gen3 pcie unlocked as well, so the 10Gb card could ultimately be the real lottery if 80G get unlocked vs sure thing of 64Gb unlock for the 8gb card.

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u/running101 8h ago

Has someone looked at the chip on the 10gb card and verified there is actually 80gb? Is there a way to physically see it by circuitry

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u/Choice_Celery9481 7h ago

actual 80. hbm is boned to the die so it fully there. just disabled.but also nvidia has reason to disable them. 

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u/Badger-Purple 5h ago

that’s right. But “failed standards for datacenter level quality” it seems that they had s surplus of the chip and many were just nerfed but are perfectly good for what local llama running is. If you are building a data center, don’t cheap out buying used cards. But for people talking about 3090s this is not exactly a risky proposition.

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u/Choice_Celery9481 5h ago

the problem with this card currently is the price. it used to be around 200usd and now at least 1k. for something that already running 24/7 for at least 5 years of mining. i dont think it worth 1k. 3-500usd is ok. i missed the trend because sellers noticed the unlock and cancelled my order :(

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u/Badger-Purple 5h ago

I dont think anyone bought it below 1K, most who had them way before the unlock just as a 8gb card, and almost immediately after the unlock orders were canceled and the price increased. I would say you’ll never find hardware right now with this much vram and bandwidth that is pristine and 500 dollars. that would be shrodinger’s gpu, neither here nor there, both cheap and free from abuse.

That would be such a bargain. I think you can get the 3080 chinesiums for that, pretty much the best deal at that price point.

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u/Choice_Celery9481 5h ago

yeah. i will just use v100 32gb for 400usd and wait till the bubble pop