Can WizardMath 7B run on RX 7900 XT 20GB?

YES — Runs Great

A72Great

○Estimated from fit model

WizardMath 7B needs ~9.1 GB VRAM. RX 7900 XT 20GB has 20.0 GB. With Q4_K_M quantization, expect ~98 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 9.1 GB, 98.0 tok/s, Runs well

9.1 GB required20.0 GB available

45% VRAM used

Fit status

Runs well

Decode

98.0 tok/s

TTFT

1976 ms

Safe context

Memory

9.1 GB / 20.0 GB

Memory breakdown

Weights4.3 GB

KV Cache2.0 GB

Runtime0.9 GB

Headroom2.0 GB

See how fast it feels

See how fast it feelsWizardMath 7B on RX 7900 XT 20GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.

Given information:
 - Speed = 60 mph (miles per hour)
 - Time = 2.5 hours

Formula: Distance = Speed x Time

Calculation:
 Distance = 60 mph x 2.5 h
 = 150 miles

The train travels 150 miles.

Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.

Breakdown:
 - First half: 1.25 hours at 60 mph = 75 miles
 - Stop: 20 minutes (no distance)
 - Second half: 1.25 hours at 60 mph = 75 miles

Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph

The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 98.0 tok/s decode · 2.0s TTFT (warm) · 245 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

No major red flags

This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	A	Runs well	98.0 tok/s	1078 ms	4K
Coding	A	Runs well	98.0 tok/s	1976 ms	4K
Agentic Coding	A	Runs well	98.0 tok/s	2873 ms	4K
Reasoning	A	Runs well	98.0 tok/s	2335 ms	4K
RAG	A	Runs well	98.0 tok/s	3592 ms	4K

Quantization options

How WizardMath 7B (7B params) fits at each quantization level on RX 7900 XT 20GB (20.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.7 GB	Low	B66
Q3_K_S	3	3.4 GB	Low	B66
NVFP4	4	3.9 GB	Medium	B67
Q4_K_M	4	4.3 GB	Medium	B67
Q5_K_M	5	5.0 GB	High	B67
Q6_K	6	5.7 GB	High	B68
Q8_0	8	7.5 GB	Very High	B69
F16Best for your GPU	16	14.3 GB	Maximum	A71

Get started

Copy-paste commands to run WizardMath 7B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
 --hf-repo "WizardLMTeam/WizardMath-7B-V1.1" \
 --hf-file "WizardMath-7B-V1.1-Q4_K_M.gguf" \
 -c 4096 -ngl 99

Your hardware

More models your RX 7900 XT 20GB can run

Model	Params	Grade	Decode
👁 Alibaba Qwen3-Coder 30B A3B Instruct	30.5B	A	40.7 tok/s
👁 Alibaba Qwen 3.5 27B	27B	A	18.3 tok/s
👁 Alibaba Qwen 3.6 27B	27B	S	17.3 tok/s
👁 Alibaba Qwen3-VL 30B A3B Instruct	30B	A	43.3 tok/s
👁 Alibaba Qwen 3.5 9B	9B	S	94 tok/s

Frequently asked questions

See all results for RX 7900 XT 20GB See all hardware for WizardMath 7B

URL: https://willitrunai.com/can-run/wizard-math-7b-on-rx-7900-xt-20gb