The answer — one pick, priced
Get the
NVIDIA RTX PRO 6000 Blackwell
No budget ceiling
The only desktop GPU that runs a 70B model at Q8 on one card — 96 GB GDDR7 ECC, 1.79 TB/s and NVLink 5, across 10 sources.
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Fit ledger — need → measured evidence
■ The catch — co-equal billing, always
It costs ~55% more than it launched at. The GDDR7 shortage took it from an $8,565 March-2025 MSRP to $13,250 on NVIDIA's own marketplace — about $12,380 at retail. Budget $12,000-$13,300, not the $8,565 you'll still see quoted, and a PSU and case airflow that can feed 600 W.
Dealbreaker? Runner-up №1 — the RTX 5090 — is a third of the price ↓
■ Every product has a catch. Verdicts that hide it are how bad buys happen.
Runners-up — if your needs differ
Adjacent verdicts — same method
Traps — this verdict avoids
Launch MSRPs are fiction
The 2026 memory shortage repriced this entire tier. The RTX PRO 6000 Blackwell went from an $8,565 launch MSRP to $13,250 on NVIDIA's own marketplace in 16 months (+55%), and the RTX PRO 5000 lists at ~$4,200 but streets at ~$7,539 — so the newest NVIDIA pro card is now the most expensive way to buy 48 GB, not the best value. Plan against street prices.
VRAM is the hard ceiling
Training needs 2-4x the memory of inference once optimizer states, gradients and activations land. A 24 GB card cannot fully fine-tune even a 7B model in BF16 (~80 GB needed), and only a 96 GB pool fits a 70B at Q8. Size against training, not inference.
The NVLink dividing line
Only the RTX PRO 6000 Blackwell and the older RTX A6000 have NVLink. Consumer RTX 5090/4090 pairs are stuck on ~64 GB/s PCIe, which throttles tensor-parallel work to 20-40% utilization against 85%+ for an NVLink pair. Two 5090s are not a substitute for one NVLink card.
Provenance — 10 sources, dated
Winners are picked before affiliate payouts are checked, from the full research dossier at knowledgelib.io. Prices, stock and listings are re-verified monthly by an automated pipeline. Some links earn us a commission — it never changes the pick, and we say so here rather than in a footer you'd never read.