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Put two chips, runtimes, or runtime versions side by side. Everything else is held fixed or called out, so a ratio is worth exactly what the matched runs say.

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Runs compared: 10
Like-for-like pairs: 2
Chips available: 8

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Side A

Side B

Model

Runtime

Runtime version

Quantisation

Backend

Prefill size

Decode size

Cooldown

7 runs vs 3 runs · 2 like-for-like pairs

Held fixedModel: Qwen3 4B Instruct 2507Prefill: PP512Decode: TG128

A side mixes quantisations. Pick a quantisation to compare the same weights.
The sides differ in conditioning, harness schema. Ratios may reflect benchmark protocol rather than the chip.

Chip comparison

Apple M5 Pro vs AMD Radeon RX 7900 XT

Ratios read side A relative to side B. Geometric mean over 2 like-for-like pairs.

Decode: 0.59×-41.0%
Prefill: 0.48×-51.9%

Side A

Apple M5 Pro

7 runs

1 contributor

Latest 11 Sep 2026

Decode · TG128: 89.4tok/s median
best 94.4 · worst 60.8
Prefill · PP512: 3,331tok/s median
best 3,405 · worst 2,566

Models: Qwen3-4B-Instruct-2507
Runtimes: BaseRTllama.cpp
Versions: BaseRT 0.2.4, llama.cpp b10809 (5266f24da)
Quantisations: Q4, Q4_K_M, Q8, Q8_0
Backends: BLAS + Metal, Metal
Cooldown: off
Conditioning: runtime_native_warmup, warmup_only
Decode workload: TG128
Harness schema: basert-benchmark-harness/1, computearena-measurements/1

Side B

AMD Radeon RX 7900 XT

3 runs

1 contributor

Latest 11 Sep 2026

Decode · TG128: 147.1tok/s median
best 147.8 · worst 110.8
Prefill · PP512: 5,364tok/s median
best 5,581 · worst 5,337

Models: Qwen3-4B-Instruct-2507
Runtimes: llama.cpp
Versions: llama.cpp b10809 (5266f24da)
Quantisations: Q4_K_M, Q8_0
Backends: ROCm
Cooldown: off
Conditioning: runtime_native_warmup
Decode workload: TG128
Harness schema: computearena-measurements/1

What differs besides the chip

Facet	Apple M5 Pro	AMD Radeon RX 7900 XT
Runtime	BaseRT, llama.cpp	llama.cpp
Runtime version	BaseRT 0.2.4, llama.cpp b10809 (5266f24da)	llama.cpp b10809 (5266f24da)
Quantisation	Q4, Q4_K_M, Q8, Q8_0	Q4_K_M, Q8_0
Backend	BLAS + Metal, Metal	ROCm
Conditioning	runtime_native_warmup, warmup_only	runtime_native_warmup
Harness schema	basert-benchmark-harness/1, computearena-measurements/1	computearena-measurements/1

Like-for-like pairs

Each row is a configuration present on both sides. Values are per-cell medians; ratios read Apple M5 Pro relative to AMD Radeon RX 7900 XT.

Configuration	Decode A	Decode B	Ratio	Prefill A	Prefill B	Ratio	Runs A / B
Qwen3-4B-Instruct-2507 llama.cppQ4_K_M	93.5	147.4	0.63×	2,567	5,350	0.48×	2 / 2
Qwen3-4B-Instruct-2507 llama.cppQ8_0	60.8	110.8	0.55×	2,686	5,581	0.48×	1 / 1

Side A · Apple M5 Pro

Top 7 of 7 runs by decode throughput.

Model / format	Chip / backend	Decode	Prefill	Contributor	Date	Report
Qwen3-4B-Instruct-2507 llama.cpp b10809 (5266f24da)Q4_K_M	Apple M5 Pro BLAS + Metal	94.4 TG128	2,568 PP512	arki05	11 Sep 2026	View Benchmark
Qwen3-4B-Instruct-2507 llama.cpp b10809 (5266f24da)Q4_K_M	Apple M5 Pro BLAS + Metal	92.6 TG128	2,566 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/Qwen3-4B-Instruct-2507 BaseRT 0.2.4Q4	Apple M5 Pro Metal	90.4 TG128	3,331 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/Qwen3-4B-Instruct-2507 BaseRT 0.2.4Q4	Apple M5 Pro Metal	89.4 TG128	3,359 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/Qwen3-4B-Instruct-2507 BaseRT 0.2.4Q8	Apple M5 Pro Metal	64.3 TG128	3,398 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/Qwen3-4B-Instruct-2507 BaseRT 0.2.4Q8	Apple M5 Pro Metal	62.8 TG128	3,405 PP512	arki05	11 Sep 2026	View Benchmark
Qwen3-4B-Instruct-2507 llama.cpp b10809 (5266f24da)Q8_0	Apple M5 Pro BLAS + Metal	60.8 TG128	2,686 PP512	arki05	11 Sep 2026	View Benchmark

Side B · AMD Radeon RX 7900 XT

Top 3 of 3 runs by decode throughput.

Model / format	Chip / backend	Decode	Prefill	Contributor	Date	Report
Qwen3-4B-Instruct-2507 llama.cpp b10809 (5266f24da)Q4_K_M	AMD Radeon RX 7900 XT ROCm	147.8 TG128	5,364 PP512	arki05	11 Sep 2026	View Benchmark
Qwen3-4B-Instruct-2507 llama.cpp b10809 (5266f24da)Q4_K_M	AMD Radeon RX 7900 XT ROCm	147.1 TG128	5,337 PP512	arki05	11 Sep 2026	View Benchmark
Qwen3-4B-Instruct-2507 llama.cpp b10809 (5266f24da)Q8_0	AMD Radeon RX 7900 XT ROCm	110.8 TG128	5,581 PP512	arki05	11 Sep 2026	View Benchmark