CanRun

Qwen3 8B hardware requirements

What is Qwen3 8B?

Qwen3 8B is a dense model that Alibaba Cloud's Qwen team released in April 2025. It thinks step by step before every answer by default, which helps with math, coding and logic, and thinking can be switched off for quick everyday chat. Its model card lists more than 100 languages and tool calling for agent tasks, and the Apache 2.0 license allows commercial use.

Model card

What to know before running Qwen3 8B

Qwen3 8B needs 6.5 GB at Q4_K_M with an 8k context, so it fits fully on 8GB cards. It runs great on the GeForce RTX 4060 and the GeForce RTX 3060 12GB. Its KV cache is what limits it on small cards. At its native 32k context it needs 10.3 GB with an f16 KV cache, and on an 8GB card even 16k spills into system RAM. On such a card, 32k stays fully on the GPU only with a q4_0 KV cache.

The model thinks before it answers by default. That costs tokens, so CanRun holds it to a speed bar 1.5 times stricter than for models without thinking; on slower hardware it ends up a step below a same-sized model like Llama 3.1 8B. On the GeForce RTX 3050 8GB, for example, it runs well while Llama runs great. The model card describes a switch to turn thinking off (enable_thinking=False, or /no_think in a message — Qwen3-8B on Hugging Face), and with thinking off a model may do one grade better than the table shows.

About the model

Parameters
8.2B
Attention
Full attention
Max context
32,768 tokens
Released
2025-04-29

Other sizes in this series

Graphics card memory each model needs at its baseline quant with 8k context, and its verdict on common graphics cards, smallest model first
ModelParametersBaseline quantMemory needed (8k)GeForce RTX 4060GeForce RTX 5060 Ti 16GBGeForce RTX 3090
Qwen3 8Bthis model8.2BQ4_K_M6.5 GBRuns greatRuns greatRuns great
Qwen3 14B14.8BQ4_K_M10.5 GBRuns slowlyRuns greatRuns great
Qwen3 30B-A3B (2507)30.5B total · 3.3B active (MoE)Q4_K_M19.8 GBRuns wellRuns wellRuns great
Qwen3 32B32.8BQ4_K_M22.0 GBWon't runRuns slowlyRuns well

GGUF files

Tracked quantizations of Qwen3 8B, smallest first
QuantFile sizeQualityPublished by
Q2_K3.28 GBHeavy lossCommunity GGUF · unsloth
IQ4_XS4.58 GBGood balanceCommunity GGUF · unsloth
Q4_K_Mbaseline5.03 GBGood balanceCommunity GGUF · unsloth
Q8_08.71 GBNear-losslessCommunity GGUF · unsloth

Some repositories publish only Unsloth Dynamic (UD) variants; sizes are those of the file you would download.

Memory needed by quant and context

Graphics card memory in GB: weights loaded on the GPU + f16 KV cache + compute buffer. Add about 0.6 GB if the GPU also drives your display on Windows. Part of the file stays off the graphics card: llama.cpp keeps the input embedding table in system RAM. A Mac counts the whole file, so it needs a little more.
Quant4k8k16k32k
Q2_K4.24.96.18.7
IQ4_XS5.46.07.39.9
Q4_K_M5.86.57.710.3
Q8_09.29.811.113.7

Which GPUs can run Qwen3 8B?

How to read the verdicts

Runs great
Fully on the GPU at 20 tok/s or more
Runs well
Fully on the GPU at 8–20 tok/s; MoE experts in system RAM at 20 tok/s or more; or at least 90% on the GPU at 8 tok/s or more
Runs slowly
2–8 tok/s; CPU-only; less than 90% on the GPU; or MoE experts in system RAM below 20 tok/s
Won't run
Does not fit, or under 2 tok/s

Filter this list by budget, type and context in the calculator

Scroll sideways to see every column.

58 GPUs, Macs and CPU setups at Q4_K_M with 8k context, sorted by verdict and speed
HardwareVerdictSpeedQuantMemoryRuns asContextNotesPrice
GeForce RTX 5090
234.3 tok/s8k estimate 201.1 tok/s (177.0–225.2, calibrated estimate ±12%)measured (1 run, 512 context)
Q4_K_M7.1 / 32.0 GBFull GPUup to 32k—$4,200 street (as of 2026-08-09)
NVIDIA RTX PRO 6000 Blackwell
Runs great
est. 201.1 tok/s177.0–225.2calibrated estimate ±12%
Q4_K_M7.1 / 96.0 GBFull GPUup to 32k——
NVIDIA RTX PRO 6000 Blackwell Max-Q
Runs great
est. 201.1 tok/s177.0–225.2calibrated estimate ±12%
Q4_K_M7.1 / 96.0 GBFull GPUup to 32k——
Radeon RX 7900 XTX
Runs great
est. 117.0 tok/s102.9–131.0calibrated estimate ±12%
Q4_K_M7.1 / 24.0 GBFull GPUup to 32k—$999 launch MSRP
GeForce RTX 3090 Ti
Runs great
est. 113.1 tok/s99.5–126.7calibrated estimate ±12%
Q4_K_M7.1 / 24.0 GBFull GPUup to 32k—$1,999 launch MSRP
GeForce RTX 4090
est. 113.1 tok/s99.5–126.7calibrated estimate ±12%
Q4_K_M7.1 / 24.0 GBFull GPUup to 32k—$2,755 street (as of 2026-08-09)
Apple M5 Ultra · 96 GB
Runs great
est. 112.2 tok/s89.8–134.7calibrated estimate ±20%
Q4_K_M6.8 / 67.2 GBUnified memoryup to 32k——
GeForce RTX 5080
Runs great
est. 107.7 tok/s94.8–120.7calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$1,256 street (as of 2026-08-09)
GeForce RTX 3090
est. 105.0 tok/s92.4–117.6calibrated estimate ±12%
Q4_K_M7.1 / 24.0 GBFull GPUup to 32k—$1,050 street (as of 2026-08-09)
GeForce RTX 3080 12GB
Runs great
est. 102.3 tok/s90.1–114.6calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 32k—$799 launch MSRP
GeForce RTX 5070 Ti
Runs great
est. 100.5 tok/s88.5–112.6calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$949 street (as of 2026-08-09)
GeForce RTX 5080 Laptop
Runs great
est. 100.5 tok/s88.5–112.6calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k——
GeForce RTX 5090 Laptop
Runs great
est. 100.5 tok/s88.5–112.6calibrated estimate ±12%
Q4_K_M7.1 / 24.0 GBFull GPUup to 32k——
Radeon RX 9070
Runs great
99.3 tok/s8k estimate 78.6 tok/s (69.2–88.0, calibrated estimate ±12%)measured (2 runs, 512 context)
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$639 street (as of 2026-08-09)
Radeon RX 7900 XT
Runs great
est. 97.5 tok/s85.8–109.2calibrated estimate ±12%
Q4_K_M7.1 / 20.0 GBFull GPUup to 32k—$899 launch MSRP
GeForce RTX 3080 10GB
Runs great
est. 85.3 tok/s75.1–95.5calibrated estimate ±12%
Q4_K_M7.1 / 10.0 GBFull GPUup to 16k—$699 launch MSRP
GeForce RTX 4080 Super
Runs great
est. 82.6 tok/s72.7–92.5calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$999 launch MSRP
GeForce RTX 4080
Runs great
est. 80.5 tok/s70.8–90.1calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$1,199 launch MSRP
Radeon RX 9070 XT
Runs great
est. 78.6 tok/s69.2–88.0calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$689 street (as of 2026-08-09)
Radeon RX 7800 XT
Runs great
est. 76.0 tok/s66.9–85.1calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$499 launch MSRP
GeForce RTX 4070 Ti Super
Runs great
est. 75.4 tok/s66.4–84.5calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$799 launch MSRP
GeForce RTX 5070
est. 75.4 tok/s66.4–84.5calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 32k—$629 street (as of 2026-08-09)
GeForce RTX 5070 Ti Laptop
Runs great
est. 75.4 tok/s66.4–84.5calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 32k——
Apple M3 Ultra · 96 GB
Runs great
est. 74.8 tok/s59.9–89.8calibrated estimate ±20%
Q4_K_M6.8 / 67.2 GBUnified memoryup to 32k——
Apple M5 Max (40-core GPU) · 48 GB
Runs great
est. 74.8 tok/s59.8–89.8calibrated estimate ±20%
Q4_K_M6.8 / 33.6 GBUnified memoryup to 32k——
Apple M2 Ultra · 64 GB
Runs great
est. 73.1 tok/s58.5–87.7calibrated estimate ±20%
Q4_K_M6.8 / 44.8 GBUnified memoryup to 32k——
GeForce RTX 2080 Ti
Runs great
est. 69.1 tok/s60.8–77.4calibrated estimate ±12%
Q4_K_M7.1 / 11.0 GBFull GPUup to 32k—$999 launch MSRP
Apple M4 Max (40-core GPU) · 48 GB
Runs great
est. 66.5 tok/s53.2–79.8calibrated estimate ±20%
Q4_K_M6.8 / 33.6 GBUnified memoryup to 32k——
GeForce RTX 4090 Laptop
Runs great
est. 64.6 tok/s56.9–72.4calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k——
Intel Arc B580
Runs great
61.0 tok/s8k estimate 43.1 tok/s (34.5–51.8, calibrated estimate ±20%)measured (1 run, 8k context)
Q4_K_M7.1 / 12.0 GBFull GPUup to 16k—$290 street (as of 2026-08-09)
GeForce RTX 4070
est. 56.6 tok/s49.8–63.3calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 32k—$599 launch MSRP
GeForce RTX 4070 Super
Runs great
est. 56.6 tok/s49.8–63.3calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 32k—$599 launch MSRP
Apple M5 Max (32-core GPU) · 36 GB
Runs great
est. 56.0 tok/s44.8–67.3calibrated estimate ±20%
Q4_K_M6.8 / 25.2 GBUnified memoryup to 32k——
GeForce GTX 1080 Ti
Runs great
est. 54.3 tok/s38.0–70.6theoretical estimate ±30%
Q4_K_M7.1 / 11.0 GBFull GPUup to 32k—$699 launch MSRP
GeForce RTX 3070
Runs great
est. 50.3 tok/s44.2–56.3calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k—$499 launch MSRP
GeForce RTX 5060
Runs great
est. 50.3 tok/s44.2–56.3calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k—$339 street (as of 2026-08-09)
GeForce RTX 5060 Ti 16GB
est. 50.3 tok/s44.2–56.3calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 32k—$569 street (as of 2026-08-09)
GeForce RTX 5060 Ti 8GB
Runs great
est. 50.3 tok/s44.2–56.3calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k—$429 street (as of 2026-08-09)
Apple M4 Max (32-core GPU) · 36 GB
Runs great
est. 50.0 tok/s40.0–59.9calibrated estimate ±20%
Q4_K_M6.8 / 25.2 GBUnified memoryup to 32k——
GeForce RTX 4080 Laptop
Runs great
est. 48.5 tok/s42.7–54.3calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 32k——
Apple M5 Pro · 24 GB
Runs great
45.4 tok/s8k estimate 37.4 tok/s (29.9–44.9, calibrated estimate ±20%)measured (1 run, 512 context)
Q4_K_M6.8 / 16.8 GBUnified memoryup to 16k——
NVIDIA DGX Spark · 128 GB
Runs great
43.9 tok/s8k estimate 34.1 tok/s (27.3–41.0, calibrated estimate ±20%)measured (1 run, 512 context)
Q4_K_M6.8 / 116.9 GBUnified memoryup to 8k—$3,999 launch MSRP (128 GB)
Ryzen AI Max+ 395 (Strix Halo) · 32 GB
Runs great
43.6 tok/s8k estimate 33.7 tok/s (26.9–40.4, calibrated estimate ±20%)measured (1 run, 512 context)
Q4_K_M6.8 / 22.4 GBUnified memoryup to 8k—$1,999 launch MSRP (128 GB)
GeForce RTX 3060 12GB
est. 40.4 tok/s35.6–45.2calibrated estimate ±12%
Q4_K_M7.1 / 12.0 GBFull GPUup to 16k—$250 street (as of 2026-08-09)
Radeon RX 9060 XT 16GB
Runs great
est. 39.2 tok/s34.5–43.9calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 16k—$449 street (as of 2026-08-09)
Apple M4 Pro · 24 GB
est. 33.3 tok/s26.6–39.9calibrated estimate ±20%
Q4_K_M6.8 / 16.8 GBUnified memoryup to 8k——
GeForce RTX 4060 Ti 16GB
Runs great
est. 32.3 tok/s28.4–36.2calibrated estimate ±12%
Q4_K_M7.1 / 16.0 GBFull GPUup to 8k—$499 launch MSRP
GeForce RTX 4060 Ti 8GB
Runs great
est. 32.3 tok/s28.4–36.2calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k—$399 launch MSRP
GeForce RTX 4060
est. 30.5 tok/s26.9–34.2calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k—$299 launch MSRP
GeForce RTX 4060 Laptop
Runs well
est. 28.7 tok/s25.3–32.2calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k
  • Try IQ4_XS: Runs great
—
GeForce RTX 4070 Laptop
Runs well
est. 28.7 tok/s25.3–32.2calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k
  • Try IQ4_XS: Runs great
—
GeForce RTX 3050 8GB
Runs well
est. 25.1 tok/s22.1–28.2calibrated estimate ±12%
Q4_K_M7.1 / 8.0 GBFull GPUup to 8k
  • Q2_K (heavy quality loss): Runs great
$249 launch MSRP
Apple M5 · 16 GB
Runs well
est. 18.7 tok/s15.0–22.5calibrated estimate ±20%
Q4_K_M6.8 / 11.2 GBUnified memoryup to 16k——
Apple M6 · 16 GB
Runs well
est. 18.7 tok/s15.0–22.5calibrated estimate ±20%
Q4_K_M6.8 / 11.2 GBUnified memoryup to 16k——
Apple M4 · 16 GB
est. 14.6 tok/s11.7–17.5calibrated estimate ±20%
Q4_K_M6.8 / 11.2 GBUnified memoryup to 16k——
DDR5-6000 dual-channel CPU · 16 GB
Runs slowly
est. 7.7 tok/s6.2–9.2calibrated estimate ±20%
Q4_K_M6.2 GB RAMCPU onlyup to 32k——
DDR5-5600 dual-channel CPU · 16 GB
Runs slowly
est. 7.2 tok/s5.7–8.6calibrated estimate ±20%
Q4_K_M6.2 GB RAMCPU onlyup to 32k——
DDR4-3200 dual-channel CPU · 16 GB
Runs slowly
est. 4.1 tok/s3.3–4.9calibrated estimate ±20%
Q4_K_M6.2 GB RAMCPU onlyup to 16k——

Models with a thinking mode spend extra tokens thinking, so their speed thresholds are 1.5× stricter (30 / 12 / 3 tok/s). With thinking turned off, a model may do one grade better.

Cheapest GPUs that run it

  • Runs greatGeForce RTX 3060 12GB$250 street (as of 2026-08-09), est. 40.4 tok/s (35.6–45.2, calibrated estimate ±12%).

Measured results for Qwen3 8B

Public benchmarks we calibrate against. Their conditions (context, backend, flags) can differ from the estimates above.

Measured results for Qwen3 8B
HardwareQuantBackendContextPrompt (tok/s)Generation (tok/s)FlagsSourceMeasured
GeForce RTX 5090Q4_K_XLllama.cpp16k—145.3—hardware-corner.net2026-08-09
GeForce RTX 4090Q4_K_XLllama.cpp16k—104.3—hardware-corner.net2026-08-09
GeForce RTX 3090Q4_K_XLllama.cpp16k—87.5—hardware-corner.net2026-08-09
GeForce RTX 3060 12GBQ4_K_XLllama.cpp16k—42.0—hardware-corner.net2026-08-09
GeForce RTX 4090Q4_K_XLllama.cpp4k9,251.0141.3CUDAhardware-corner.net2026-03-01
GeForce RTX 5090Q4_K_XLllama.cpp4k11,933.0200.4CUDAhardware-corner.net2026-03-02
GeForce RTX 3090Q4_K_XLllama.cpp4k4,050.0115.3CUDAhardware-corner.net2025-12-09
GeForce RTX 3060 12GBQ4_K_XLllama.cpp4k1,697.055.2CUDAhardware-corner.net2025-12-09
GeForce RTX 3090 TiQ4_K_XLllama.cpp4k4,468.0123.7CUDAhardware-corner.net2025-12-09
GeForce RTX 4060 Ti 16GBQ4_K_XLllama.cpp4k2,675.045.8CUDAhardware-corner.net2025-12-09
GeForce RTX 4070 SuperQ4_K_XLllama.cpp4k4,322.075.4CUDAhardware-corner.net2025-12-09
GeForce RTX 4070 Ti SuperQ4_K_XLllama.cpp4k5,220.096.3CUDAhardware-corner.net2025-12-09
GeForce RTX 4070Q4_K_XLllama.cpp4k3,564.071.2CUDAhardware-corner.net2025-12-09
GeForce RTX 4080 SuperQ4_K_XLllama.cpp4k6,137.0104.2CUDAhardware-corner.net2025-12-09
GeForce RTX 4080Q4_K_XLllama.cpp4k6,178.0102.7CUDAhardware-corner.net2025-12-09
GeForce RTX 5060 Ti 16GBQ4_K_XLllama.cpp4k2,965.069.2CUDAhardware-corner.net2025-12-09
GeForce RTX 5070 TiQ4_K_XLllama.cpp4k5,557.0120.5CUDAhardware-corner.net2025-12-09
GeForce RTX 5070Q4_K_XLllama.cpp4k3,488.085.8CUDAhardware-corner.net2025-12-09
GeForce RTX 5080Q4_K_XLllama.cpp4k6,410.0129.1CUDAhardware-corner.net2025-12-09
GeForce RTX 3080 10GBQ4_K_XLllama.cpp16k2,288.074.2CUDAhardware-corner.net2025-12-09
GeForce RTX 5090Q4_K_Mllama.cpp512—234.3CUDA, KV q8_0github.com2026-10-07
GeForce RTX 5090Q8_0llama.cpp51210,787.0136.2CUDAgithub.com2025-10-16
Radeon RX 9070Q4_K_Mllama.cpp5122,635.0109.9Vulkangithub.com2026-09-06
Radeon RX 9070Q4_K_Mllama.cpp5123,447.088.7ROCmgithub.com2026-09-07
Intel Arc B580Q4_K_Mollama8k—61.0Vulkangithub.com2026-08-27
Ryzen AI Max+ 395 (Strix Halo)Q4_K_Mllama.cpp5121,238.043.6Vulkangithub.com2026-09-08
NVIDIA DGX SparkQ4_K_Mllama.cpp5123,168.043.9CUDAgithub.com2025-12-05
Apple M5 ProQ4_K_Mllama.cpp5121,223.045.4Metalgithub.com2026-09-08
Apple M5Q8_0llama.cpp512712.016.1Metal, KV q8_0andoriyanishant.com2026-09-13

Frequently asked questions

How much VRAM does Qwen3 8B need?

At Q4_K_M the file is 5.03 GB; with 8k context a graphics card needs about 6.5 GB (weights 4.67 GB, KV cache 1.2 GB, compute buffer 0.6 GB). The smallest tracked file (Q2_K (heavy quality loss)) needs about 4.9 GB. Part of the file stays off the graphics card: llama.cpp keeps the input embedding table in system RAM. A Mac counts the whole file, so it needs a little more.

What is the cheapest GPU that runs Qwen3 8B well?

Cheapest that runs it great: GeForce RTX 3060 12GB at $250 (street price as of 2026-08-09), est. 40.4 tok/s (35.6–45.2, calibrated estimate ±12%).

Can Qwen3 8B run on an 8 GB, 16 GB or 24 GB GPU?

At Q4_K_M with 8k context: GeForce RTX 4060 — Runs great, est. 30.5 tok/s (26.9–34.2, calibrated estimate ±12%); GeForce RTX 5060 Ti 16GB — Runs great, est. 50.3 tok/s (44.2–56.3, calibrated estimate ±12%); GeForce RTX 3090 — Runs great, est. 105.0 tok/s (92.4–117.6, calibrated estimate ±12%).

Speeds are estimates from memory bandwidth, calibrated against public benchmarks, and each one comes with an error band and a confidence label. Real results vary with drivers, backend, context length and thermals.