16 GB GDDR7. Fits Unsloth 3-bit / IQ4_XS class files (~13–16 GB) with little KV headroom. Do not expect comfortable Q4_K_M (~17 GB weights) plus context.
Who it is for
- CUDA boxes that already have a 16 GB 50-series card and will run Q3/IQ4 with short context.
- People comparing a new 16 GB Blackwell card against a used 24 GB 3090 for this model only.
Who should skip it
- Anyone standardizing on Q4_K_M as the daily quant.
- Long-context (64k+) GPU-resident users.
What to compare
- 16 GB is the Q3 / IQ4_XS rung. Q4_K_M at ~17 GB does not leave a usable KV budget on this card.
- Blackwell NVFP4 can stretch 16–24 GB class cards; still treat 24 GB as the honest Q4 default.
- If the goal is everyday Q4 quality, step up to a 24 GB 3090 or 32 GB 5090 rather than squeezing this.
Verify on the Amazon listing
- Confirm RTX 5080 16 GB, not 5090 32 GB or 5070 12 GB.
- Confirm seller and board length versus the case.
Honest limitation
16 GB is below the comfortable Q4_K_M + KV envelope. This is a compromise quant card, not the recommended 27B daily driver.
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