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Was my $48K GPU server worth it?

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Re: Was my $48K GPU server worth it?

#161
Quick tip for people who want to experiment with local models: A lot of the common smaller models are also available on openrouter or other services. Dirt cheap.

I know it's not the same. But a lot of people buy expensive GPUs, just to find out they have no real use for smaller models.

Re: Was my $48K GPU server worth it?

#162
post #144

Earlier quoted context omitted.

Or they just have lots of money and a hobby. Someone else might blow $48K to get an old Cessna and go have fun flying around. Not everything needs to have a purpose.

A self-described "broke grad student [who has] been saving up for this for years." Risking their own money and time instead of leveraging a PowerPoint to hire other peoples' labor with other peoples' money. I can respect that.

You read that line wrong.

Re: Was my $48K GPU server worth it?

#163

In the last year, I have bought an M3 Ultra Mac Studio with 512 GB, a Macbook Pro M5 MAX with 128 GB and an RTX 6000 Pro. I have spent around $25k so far, not including electricity. I figured worst case scenario I can sell them in the next year and only take a haircut as opposed to losing my entire investment. In comparison to just spending for tokens, the tokens would have been much cheaper and much much faster. I'v…

I’m not usually one to ask this because learning to do a thing can be fun, but why exactly have you spent 25 thousand dollars on getting an LLM someone else made to answer maths exam questions?

I didn't spend that much, only $6500 AUD for a GB10 based Asus GX10 which is even slower than OPs, but I spent that because it makes for a great learning platform. Theres not much else that lets me fiddle with 128GB of RAM for my graphics processor, and it's quite lovely to be able to run things as long as I like without worrying about my cloud instance being shut down.

It's not financially a good idea: renting really does beat owning, and cloud beats both if you're only running inference on these machines. But I'm not just doing inference, and as a thing I can do silly stuff on to learn, it's hard to beat!

Re: Was my $48K GPU server worth it?

#164

I did the math at least on a Macbook pro, and for inference it's definitely not worth it. - https://www.williamangel.net/blog/2026/05/17/offline-llm-ene... - Discussion: https://news.ycombinator.com/item?id=48168198

That's the case with Self-hosting anything. It is the privacy that matters.

Re: Was my $48K GPU server worth it?

#165

Earlier quoted context omitted.

I’m not usually one to ask this because learning to do a thing can be fun, but why exactly have you spent 25 thousand dollars on getting an LLM someone else made to answer maths exam questions?

Privacy and offline operation are valuable or non-negotiable in some cases, but the difference is pretty categorical between what can run on a single card and what can run on a DGX GB200 NVL72 cabinet. Doesn't mean it's not worth seeing how far local models can be pushed. Not every problem needs a senior engineer.

> the difference is pretty categorical between what can run on a single card and what can run on a DGX GB200 NVL72 cabinet.

A better way of putting it is that you can run plenty of things on a single ordinary system, but you may be disappointed at the performance. Generally, you can't expect inference to be as quick as with cloud for SOTA-like models. You have to run smaller models for quick replies, and large models with a lot of real-world knowledge for less time-critical inference, possibly batching many requests simultaneously to improve throughput.

Re: Was my $48K GPU server worth it?

#166

In the last year, I have bought an M3 Ultra Mac Studio with 512 GB, a Macbook Pro M5 MAX with 128 GB and an RTX 6000 Pro. I have spent around $25k so far, not including electricity. I figured worst case scenario I can sell them in the next year and only take a haircut as opposed to losing my entire investment. In comparison to just spending for tokens, the tokens would have been much cheaper and much much faster. I'v…

> I figured worst case scenario I can sell them in the next year and only take a haircut as opposed to losing my entire investment.

It's going to be a non-trivial haircut. This stuff depreciates pretty fast.

Re: Was my $48K GPU server worth it?

#167

Earlier quoted context omitted.

Nitpicking, but the worst case of spending $25k is unforeseen circumstances that write off the entire asset. I don’t think -$2000 is a conservative enough figure for standard depreciation either (a lot can happen in a year)

Either I don't understand the used apple market.. or I agree this is crazy. Someone spends $25k on new hardware, waits a year, and expects to sell it for $23k? Unless the ram issues save him, and cost of new goes up, I don't see how that was going to work.

A lot of expensive things hold their value well. I have a friend who is really into telescopes and he now owns a $100,000 telescope but he didn't directly buy such an expensive scope. He started out with much cheaper ones and was able to sell them for about what he bought them for to help fund more expensive ones over 20 years. It is really interesting.

Re: Was my $48K GPU server worth it?

#168
post #151

Earlier quoted context omitted.

I found them dumped out in the “street” in a place ordained by law as public domain. So I just grabbed up the media and use it in private.

How many Blurays are we talking about?

500 TB/25 GB = 20.000

if some have more than one layer it could fewer but that's the order of magnitude

Re: Was my $48K GPU server worth it?

#169

In the last year, I have bought an M3 Ultra Mac Studio with 512 GB, a Macbook Pro M5 MAX with 128 GB and an RTX 6000 Pro. I have spent around $25k so far, not including electricity. I figured worst case scenario I can sell them in the next year and only take a haircut as opposed to losing my entire investment. In comparison to just spending for tokens, the tokens would have been much cheaper and much much faster. I'v…

If you're in a decent sized city, you should be able to find a local buyer on Craigslist or FB Marketplace... Beyond that, for higher value, smaller items like your M3 Ultra, I would talk to your local police department and/or library to see if you can do the exchange there. Larger libraries usually have a police officer on site or nearby, and the PD office near you may also provide a "safe" exchange location... I'd…

Something is very wrong in some countries if you have to get police protection to sell a f* computer. I get it’s on the expensive side but still….

Re: Was my $48K GPU server worth it?

#170
post #150

I administer a simple AI server in the office, which just uses a single RTX 5090 but is able to serve ~80 people throughout the day. I'm impressed by Qwen3.6-27b's capabilities in agentic coding/tasks so far. Devs say it's not much different from Sonnet 4.6 on many tasks (sometimes it even outperformed it), 40-60 tok/sec, up to 260k context. The server cost about $10k with all the bells and whistles. I spent a lot of…

Wouldn't that be a fairly ideal setup for layer parallelism? That doesn't need the high-performance communication of tensor parallelism, and the high-concurrency regime would make it easy to keep the pipeline full with microbatches. You'd also be able to scale out your KV cache storage since that naturally splits layer-wise.
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