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estimate

Can I run Gemma 2 27B on a Dual RTX 4090?

Yes, fully in VRAM (estimate)

Can I run Gemma 2 27B on a Dual RTX 4090? Yes, fully in VRAM (estimate). About 19.4 GB at Q4_K_M (estimate).

Updated . The later of the hardware price date and the formula date.

Gemma 2 27B on Dual RTX 4090, formula estimate
QuantContextWeightsKVOverheadTotalUsableFitEst. tok/s
Q4 Q4_K_M8,192 tokens16.3 GB estimate2.3 GB estimate0.8 GB estimate19.4 GB estimate46.8 GB estimatefull46 tok/s estimate
Q5 Q5 (~0.71 bytes/param)8,192 tokens19.3 GB estimate2.3 GB estimate0.8 GB estimate22.4 GB estimate46.8 GB estimatefull40 tok/s estimate
Q8 Q88,192 tokens29.1 GB estimate2.3 GB estimate0.8 GB estimate32.2 GB estimate46.8 GB estimatefull27 tok/s estimate
FP16 FP168,192 tokens54.4 GB estimate2.3 GB estimate0.8 GB estimate57.5 GB estimate46.8 GB estimateoffload3.3 tok/s estimate
Q4, longer context8,192 tokens16.3 GB estimate2.3 GB estimate0.8 GB estimate19.4 GB estimate46.8 GB estimatefull46 tok/s estimate

Formula estimate, not a benchmark. Method →

Cheapest catalog option that fits at Q4

Radeon RX 7900 XTX 24GB, new (out of stock), €1,050, dated 2026-10-16. No buy link.

This hardware

$8,206€7,330

price as of 16 Oct 2026

128 GB DDR4 (estimate): $2,754€2,460. From the 16 Oct 2026 fact-check.

rest of system (estimate): $560€500. The total is the GPU price plus the RAM line plus this estimate. It is not a checked system price.

price unverified

GPU line is 2× the used median €2,185 (€4,370), labelled used, from pcprice.watch (https://www.pcprice.watch/gpu-buying-guide/rtx-4090-price-used-and-specs). 128 GB DDR4 (estimate) €2,460, from the 16 Oct 2026 fact-check. Rest of system (estimate) €500. Other parts from €500 in that fact-check. Not a shop listing. DDR5 was not separately priced, so this total uses the sourced 128 GB DDR4 line. The total is the GPU price plus the RAM line plus that rest estimate. It is not a checked system price.

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Gemma 2 27B on Dual RTX 4090

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Questions

Can I run Gemma 2 27B on a Dual RTX 4090?
Yes, fully in VRAM (estimate).
How much memory does Gemma 2 27B need at Q4?
About 19.4 GB at 8,192 tokens (estimate): 16.3 GB weights, 2.3 GB KV cache, 0.8 GB overhead.
How fast is Gemma 2 27B on Dual RTX 4090 (estimate)?
About 46 tok/s at Q4 (estimate, not a benchmark).
Gemma 2 27B on Dual RTX 4090 (estimate) · localLLMrig