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Joined 1 year ago
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Cake day: March 15th, 2025

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  • I am figuring on selling off my previous machine once the teething issues with the new one has been resolved. Given these specs, what would be a fair price, Lemmings? I was guessing around $2,250 without the drives, but I am not really on the pulse of the market.

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    • CPU = Ryzen 5950x + Noctua heatsink with Kryosheet.

    • PSU = SeaSonic Vertex GX-1200

    • MOBO = Crosshair Hero VIII + WiFi

    • CASE = Rosewill Thor V2

    • RAM = DDR4 3600, 128gb total, came as a kit of 4 sticks.

    • STORAGE (OPTIONAL) = x2 to x5 4tb SSD SATA drives, non-NVME.

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    The biggest issue here is doing an RMA on the CPU. It is unstable when PBO is enabled. Since I suck at techno surgery, I wouldn’t be able to install the replacement without forking over money to a technician. Maybe I can make that contingent on buying at least 2 SSD SATA drives?

    My new machine has only 4 SATA ports, and the SATA card to support all five SSDs and the optical disc drive is taking up a GPU slot. Being able to buy some 2280 M2 drives would solve that problem for me. That would gel nicely with a technician handling the transfer of the SATA SSDs back to the old machine for the new owner, since the tech can also get the M2 and a third GPU into my new PC.


  • Courtesy of Kagi’s search AI:

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    It appears there is a slight misunderstanding of the acronym: Yann LeCun’s architecture is called JEPA (Joint Embedding Predictive Architecture), not JASP.

    JEPA differs from Large Language Models (LLMs) primarily in how they learn, what they predict, and how they represent the world. While LLMs are “word models” designed to generate sequences of tokens, JEPA is intended to create “world models” that understand the underlying physics and logic of reality 3 4 .

    The key differences are summarized below:

    1. Generative vs. Predictive (Non-Generative)

      LLMs are Generative: They operate by predicting the next token in a sequence (generative AI) 2 . This approach often leads to hallucinations because the model focuses on statistical probability rather than factual ground truth 6 . JEPA is Predictive: Instead of generating every single pixel or word, JEPA predicts latent representations (embeddings) in a hidden space 5 . It tries to learn what is “plausible” rather than attempting to reconstruct every single detail of the input.

    2. Word Models vs. World Models

      LLMs are “Word Models”: They learn from text and treat intelligence as a language manipulation task 4 . LeCun argues that language captures only a small subset of human thinking and cannot represent high-dimensional physical spaces 2 7 . JEPA aims for “World Models”: It is designed to understand cause and effect, physics, and the physical environment 1 . This allows the system to reason from first principles and plan sequences of actions, which is a prerequisite for autonomous AI 1 .

    3. System 1 vs. System 2 Thinking

      LLMs (System 1): LeCun describes LLMs as “System 1” processes—they are reactive and perform a fixed amount of computation to produce each token 2 . JEPA (Path to System 2): By incorporating world models, JEPA is intended to enable “System 2” thinking—the ability to plan, reason, and deliberate before acting 1 .

    Summary Comparison Table Feature Large Language Models (LLMs) JEPA / World Models Core Goal Predict next token (Text/Code) Predict latent state (Reality/Physics) Method Generative (Pixel/Token by pixel/token) Joint Embedding (Non-generative) Domain Linguistic/Statistical patterns Physical/Causal understanding Weakness Hallucinations, lacks physical grounding Limited fluency in natural language Cognition Reactive (System 1) Planning/Reasoning (System 2)







  • I bought some DDR5 RDIMMs, 2x16gb 5600mhz. Cost me $606 at Ebay, but I haven’t yet got a chance to install and test them. Word of warning: stay on top of your shipping order, and if the seller is slow to ship or the shipment is late, message them and open a case with Ebay.

    Hopefully my sticks are the real thing, but the biggest problem is the belabored shipping. I bought a Threadripper 7965WX on Ebay for $1500, and the return window is closing. It sucks when a seller holds up an entire project by being dumb about getting stuff mailed.


  • I tried buying some rather cheap DDR5 RDIMMs through Alibaba. The process to actually buy is pretty vague, and I found that the suppliers I contacted really suck at communication. The two I spoke to, didn’t acknowledge the details I was actually asking about, and spoke broken English at best. The shipper I spoke with, Cooperate Logistics, had fairly clear communication, but was very slow at conversation - it took about two or three days for our dialogues to conclude. They tried to buy the goods on my behalf, but they couldn’t - the supplier had to send the goods over to the shipper’s place, THEN it would go to me.

    There is potential in buying from Alibaba, but many of the suppliers feel sketchy, and the bad communications make it hard to feel trust. I ultimately gave up. 😔