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NVIDIA RTX 4090 48GB - $5,000 (alameda)
South Shore Center near Otis
QR Code Link to This Post
NVIDIA RTX 4090 48GB - PROFESSIONALLY MODIFIED - USA BUILT
FULL POWER AD102-300 CORE - NOT THE NERFED 4090D - $5000 FIRM
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Selling a 48GB RTX 4090, professionally modified right here in the
USA by a class 2 BGA certified technician. This is the FULL POWER
AD102-300 core -- NOT the cut-down 4090D variant that typically
comes from overseas. Made and warrantied in the USA.
Ideal for AI/LLM workloads, high-density GPU servers, or anyone
who needs serious VRAM. Same footprint as an A100/A6000, built for
stacking 2-8 GPUs per system.
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SPECS
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- 48GB GDDR6X VRAM (2x a stock 4090)
- Full power AD102-300/301 core (not the D variant)
- ~900 GB/s memory bandwidth, same memory performance as stock 4090
- 450W TDP, 12VHPWR connector
- PCIe 4.0 x16
- 3x DisplayPort 1.4, 1x HDMI 2.1
- 10.5" x 4.5" -- standard 2-slot spacing
- Gen 3 PCB (better power/cooling configuration)
- Plug and play with standard Nvidia drivers on Windows and Linux
-- no special configuration needed
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HOW IT STACKS UP: 48GB VRAM GPU COMPARISON
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GPU FP32 FP16 Tensor Bandwidth TDP Used Price
---------------- ------ ----------- ---------- ---- ------------
THIS 4090 48GB 82.6 330 ~900 GB/s 450W $5,000 FIRM
RTX A6000 38.7 155 768 GB/s 300W $3,800-4,500
RTX 6000 Ada 91.1 364 960 GB/s 300W $6,800-7,000+
NVIDIA L40S 91.6 362 864 GB/s 350W $7,000-8,000+
NVIDIA A40 37.4 150 696 GB/s 300W $3,500-4,500
(TFLOPS are dense, no sparsity inflation -- same measuring stick
for all cards.)
Notes: The A6000 and A40 are older Ampere cards with less than
HALF the compute of this 4090 -- and the A40 has passive cooling
and no display outputs (server chassis only). The L40S also has
no display outputs. The RTX 6000 Ada and L40S match this card's
compute but cost $2,000-3,000+ more. Same 48GB, same Ada
generation, best price on the market -- this 4090 wins on
performance per dollar.
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QUALITY ASSURANCE
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Every card is professionally reworked with high-quality flux,
ultrasonically cleaned, and run through a full validation suite
(PyTorch, LLM/diffusion workloads, GPU Burn, FurMark, VRAM memtest).
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PRICE & TERMS
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$5000 CASH, FIRM. Local meetup only. No trades, no shipping, no
holds. Serious buyers only -- the price is firm, so no lowballs
please.
MEETUP & TESTING:
- Public meetup locations only (police station lobby, busy coffee
shop, etc.) -- for everyone's safety, no exceptions.
- Bring your own rig if you want to test the card before handing
over cash. Happy to let you verify it works on the spot.
PLEASE READ:
Serious, ready-to-buy inquiries only. Please do NOT message me if
you just want to chat about GPUs, ask questions with no intent to
buy, sell me your own card, or compare builds. I'm happy to answer
genuine questions from actual buyers, but I won't respond to
messages that aren't about purchasing this card.
These go for $5,500+ after tax and shipping on eBay and GPU Lab --
this is the best price you'll find on one.
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TAGS / KEYWORDS
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RTX 4090, 4090 48GB, Nvidia, GPU, graphics card, AI GPU, LLM,
machine learning, deep learning, VRAM, CUDA, server GPU,
workstation, Stable Diffusion, ComfyUI, PyTorch, local AI, ChatGPT,
Ollama, Llama, fine tuning, AI training, inference, homelab, 4090D,
48GB VRAM, video card, rendering, Blender, Unreal Engine, data
science, GPU server, A100 alternative, A6000 alternative