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AMD · RDNA 3 · 20 GB · Qwen3.8 27B · Q4_K_M: ~24 tok/s

AMD Radeon RX 7900 XT 20GB

20 GB is an awkward size that happens to suit local models: room for a 24B dense model at Q6 or a 30B at Q4 with a short context, at used prices well under a 7900 XTX.

Lowest price right now

$699.99

eBay · free shipping · $34 per GB · observed 2026-10-18 02:55 UTC

Buy the cheapest on eBay, $699.99

free shipping · Used · paymore_moonvalley_arizona 1,070 · 97.1%

All 34 listings on eBay

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Price history

Tracking started today. The chart appears once there is a second day of data.

Where to buy

VendorPriceConditionObserved
eBay
cheapest active listing		 $699.99
free shipping		 new and used 2026-10-18 02:55 UTC Go to eBay

On eBay now

34 listings passed our filters at the last check. Cheapest delivered first. Seller reputation is feedback count and positive rate.

All 34 listings · Open the search on eBay

What it runs

For each model, grouped by vendor with the newest first: the largest quant that fits with 8K of context and the estimated speed for one user, at 8K and at 32K of context. On a card, a model too big for its memory can still run with part of the weights in system RAM; we assume 64 GB, and the speed shown accounts for it. The model you picked on the ladder is highlighted. Estimates from the spec sheet, not measurements: see how we estimate.

ModelQuantNeeds at 8KFitMax contextDecode at 8KAt 32KPrefill tok/s
DeepSeek
DeepSeek V4.1 Flash 552B-A16B Sep 2026Q4_K_M338 GBdoes not fit
DeepSeek V4 Flash 284B-A13B Jul 2026Q4_K_M175 GBdoes not fit
DeepSeek V3.1 671B-A37B Aug 2025Q4_K_M411 GBdoes not fit
Gemma
Gemma 4 12B May 2026Q8_014 GBfits128K+~31~30~1,100
Gemma 4 31B Mar 2026Q3_K_M17 GBfits41K~25~23~420
Gemma 4 26B-A4B Mar 2026Q5_K_M20 GBfits28K~94~3,400
Gemma 3 27B Mar 2025Q4_K_M19 GBfits21K~23~470
GLM
GLM-5.3 753B-A40B Aug 2026Q4_K_M462 GBdoes not fit
GLM-5.3 Flash 320B-A18B Aug 2026Q4_K_M197 GBdoes not fit
GLM-4.6 355B-A32B Sep 2025Q4_K_M221 GBdoes not fit
GLM-4.5 Air 106B-A12B Jul 2025Q4_K_M68 GBruns with 48 GB in system RAM~6.9~5.9~540
gpt-oss
gpt-oss-120b Aug 2025Q4_K_M73 GBruns with 54 GB in system RAM~16~14~1,300
gpt-oss-20b Aug 2025Q6_K19 GBfits25K~84~3,600
Llama
Llama 4 Scout 109B-A17B Apr 2025Q4_K_M70 GBruns with 50 GB in system RAM~4.9~4.3~380
Llama 3.3 70B Dec 2024Q4_K_M47 GBruns with 28 GB in system RAM~1.4~1.1~91
Llama 3.1 8B Jul 2024Q8_011 GBfits74K~42~31~1,600
MiMo
MiMo V2.6 Pro 1.02T-A42B Sep 2026Q4_K_M624 GBdoes not fit
MiMo V2.6 Flash 309B-A15B Sep 2026Q4_K_M190 GBdoes not fit
Mistral
Mistral Medium 3.5 128B Mar 2026Q3_K_M67 GBruns with 48 GB in system RAM~0.8~50
Mistral Small 4 119B-A6.5B Mar 2026Q3_K_M65 GBruns with 45 GB in system RAM~13~990
Mistral Small 3.2 24B Jun 2025Q5_K_M20 GBfits8K~22~540
Nemotron
Nemotron 3.5 Lightning 30B-A3B Aug 2026Q3_K_M17 GBfits128K+~130~120~3,700
Qwen
Qwen3.8 Flash-Next 125B-A6B Aug 2026Q3_K_M63 GBruns with 43 GB in system RAM~18~17~1,100
Qwen3.8 27B Aug 2026 (your pick)Q4_K_M19 GBfits30K~24~480
Qwen3.6 27B Apr 2026Q4_K_M19 GBfits30K~24~480
Qwen3.6 35B-A3B Apr 2026Q3_K_M19 GBfits64K~130~110~4,300
Qwen3.5 9B Feb 2026Q8_011 GBfits128K+~41~38~1,400
Qwen3 Coder 480B-A35B Jul 2025Q4_K_M296 GBdoes not fit
Qwen3 235B-A22B Jul 2025Q4_K_M146 GBdoes not fit
Qwen3 32B Apr 2025Q3_K_M20 GBfits9K~22~390

Specifications

Memory
20 GB GDDR6
Memory bandwidth
800 GB/s
Bus width
320-bit
Shader cores
5,376
FP32
51.6 TFLOPS
FP16 (dense)
103 TFLOPS
Power
315 W
Form factor
Dual or triple slot, full height
Interface
PCIe 4.0 x16
Architecture
RDNA 3
Launched
2022
MSRP
$899

Source: manufacturer specifications.

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