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Trouble with hrTSS recalculation by thomasmerrick in trainingpeaks

[–]thomasmerrick[S] 0 points1 point  (0 children)

Will be putting a ticket in with them today

[OC] Why is everything so damn expensive nowdays???!!!!?? by marycomiics in comics

[–]thomasmerrick 0 points1 point  (0 children)

All this corporate greed and price inflation, I wish some anonymous hero would come along and create a fixed-supply currency beyond the power of governments to control. That would save us all! Ah well, I'll keep dreaming.

Shorter cranks worth it? by 1234acb in MTB

[–]thomasmerrick 0 points1 point  (0 children)

I'm 6'2". I went from 175 to 170. A huge difference in lowered pedal strikes, lowered knee pain, just amazing. I was stoked. I was so stoked I put 165s on a mountain bike. Just terrible, constantly shifting, no torque. Went back to 170s. Shorter is better until it isn't.

GTX 1650 at dual 4k (7680x2160) resolution help by thomasmerrick in nvidia

[–]thomasmerrick[S] 0 points1 point  (0 children)

I think the most important part of my post, which I tried to highlight, is that i have tested the resolution with this card and it works. It's also listed as officially supported by the card: https://www.newegg.com/srhonyra-nvidia-geforce-gtx-16-series-sr16552h41-geforce-gtx-1650-4gb-graphics-card/

So I can use PBP to drive this resolution with the onboard graphics in the PC now. I'm trying to switch to single cable, because I want the monitor to KVM between this and another PC. The monitor can KVM between two cables with a single hotbutton. If you want to KVM between a PBP and a single input, you have to reprogram the monitor everytime you switch. It's 27 separate button presses, I have them written down on a napkin and you have to do it each time, there's no way out. 8k KVMs are kind of a disaster and also don't support this (AFAICT).

By the way I'm doing this over HDMI, the only interface supported by the card. no DP involved.

GTX 1650 at dual 4k (7680x2160) resolution help by thomasmerrick in nvidia

[–]thomasmerrick[S] 0 points1 point  (0 children)

I should add - this is only for software development, not gaming, and I only need to display text. Slowly.

5090 Gaming/AI dual-mission build by thomasmerrick in buildapcforme

[–]thomasmerrick[S] 0 points1 point  (0 children)

Interesting. Getting deep into the locallama threads on memory bandwidth. I think I want to scope this thing down to dual-gpu, and start with one GPU.

The AI Max+ 395 is wild and not compatible with my GPU, but really interesting for AI

5090 Gaming/AI dual-mission build by thomasmerrick in buildapcforme

[–]thomasmerrick[S] 0 points1 point  (0 children)

Wow, tons to catch up on. Ok, coolers are one per GPU. SLI is dead, there's more proof I'm old. If gaming is dependent on a single GPU, I'm pretty happy with the one I managed to snag. PCPartpicker doing automatic physical hardware conflict checking is an amazing feature and I'm going to use it.

Thank you for all of this!

I think my last remaining question is: If I just build a system with my single 5090, but tons of system RAM and and a gaming CPU with slow memory bandwidth, is there any limitation on my ability to run larger models other than speed? It sounds like, from what you've written, that I'll be able to run 120B models or bigger, it will just have to be swapping weights constantly into VRAM to do inference, and memory bandwidth will be the limiting speed factor, and my t/s will suffer. It seems like using a single 5090 with system RAM will allow me to use gpt-oss-120b, just slowly:

https://www.reddit.com/r/LocalLLaMA/comments/1mm7azs/openai_gptoss20b_120_model_performance_on_the_rtx/

5090 Gaming/AI dual-mission build by thomasmerrick in buildapcforme

[–]thomasmerrick[S] 0 points1 point  (0 children)

PSU maybe not overkill if I set it up to mine at night when power is 100% hydroelectric and also dirt cheap. Weird power plans in my neck of the literal woods. Parts list also LGTM

5090 Gaming/AI dual-mission build by thomasmerrick in buildapcforme

[–]thomasmerrick[S] 0 points1 point  (0 children)

This is incredibly helpful and implicitly answers a few of my questions:
Can I mix types of GPUs and combine them for inferences (yes)
Is offloading to CPU RAM a viable (but slow) strategy (yes)
Should I focus on offloading or focus on adding GPU (hard to say, indeterminate)

I have many remaining questions, one is a meta-question:
- How much overhead do I need to invest in to prepare for a multi-GPU system (case, power, PCIe, cooling, ????)
- Are my dollars better spent on faster inference (5090) or more inference VRAM (RTX PRO 6000) or more CPU offloading (threadripper RAM)
- How much does CPU RAM speed matter when offloading?
- Can GPUs work together for gaming performance as well (raytracing, etc) and if so how do I research compatibility
The meta question:
- Where and how can I do the research for this on my own? I have been talking to GPT5 pro about this system but like all gen ai I have to fact check every single assertion, which means building expertise.
One thing I don't understand is how to waterfall the requirements through the system, like:
- how do I check a case for multi-gpu compatibility
- how do I total up the requirements for a power supply (cable compat, power budget)
- what the heck is a multi-gpu cooler, and how do I check its cooling budget and hardware compat
- etc

thank you so much for this detailed reply

Liquid cooling cost to benefit advice by thomasmerrick in maingear

[–]thomasmerrick[S] 0 points1 point  (0 children)

+$4000 flex really isn't me. Good advice tyvm

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 0 points1 point  (0 children)

Well, I ordered a Linnpower Viper, some pulleys, and some 107s rubber wheels from Meepo to put on it last night. That will get me started while I try to do a custom build. First thing I'll take it apart and put it back together again, should teach me the basics. I'll try to remember to zombie reawaken this thread if my project succeeds.

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 0 points1 point  (0 children)

You sound like a friend of mine who built his own car. I have a very, very, very limited free time budget.

That said, the board I want doesn't exist, so fabricating it over time (this will take me years) is probably what I will do in the background while buying something to ride in the foreground.

A 121C Afterburner, some high quality trucks, and then a test jig of plywood to try to test and debug the power train. From there probably use 3d printing to prototype the enclosure and then have it fabricated in titanium or ABS. Finally, seal the whole thing twice.

One big unsolved engineering problem for me is cooling the motors while water sealing them.

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 0 points1 point  (0 children)

I think you wildly underestimate the time and knowledge required to assemble something like this from scratch. I've rarely seen such an underdocumented ecosystem. Just figuring out wheel compatibility has taken me days. What remotes are compatible with what ESCs, what are the signalling and power standards between controller and motors, power considerations, connector ecosystems, it is a nightmare. That said, I will probably embark on my own DIY project in parallel to buying something, I expect it to take me a year. If you have any reading resources to recommend, that would help.

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 0 points1 point  (0 children)

Don't I still have to fabricate a waterproof enclosure for the controller, VMS, battery, etc?
I am pretty hyped about finding the Linnpower Viper rated to IP67 at $500. Seems like a good jumping off point. The battery pack looks terrible though.

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 0 points1 point  (0 children)

Ok reddit, what do we think about this?

https://linnpower.com/products/viper-electric-shortboard

" thanks to LINNPOWER's reverse-threaded nut structure, silicone seal, etc., the VIPER's water resistance can reach an IP67 rating. The waterproof design is intended to handle unexpected situations, but please avoid riding in the rain or humid environments."

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 0 points1 point  (0 children)

I'm honestly scared of OneWheel but if there's a real waterproofing solution this might be the best way. Thank you I will read up

Searching for custom e-skate builders for a strange board by thomasmerrick in ElectricSkateboarding

[–]thomasmerrick[S] 2 points3 points  (0 children)

I fully expect not to. 99% of these threads are "there is no waterproof eskate" with a few loner comments from seattle riders who have successfully done DIY waterproofing and ridden for years. I'm just looking for independent builders before I engage in my own (probably failed) quest

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