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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: 11

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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: Gemma 4 E4B ITPrefill: 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: 0.60×-39.6%
Prefill: 0.51×-48.8%

Side A

Apple M5 Pro

7 runs

1 contributor

Latest 11 Sep 2026

Decode · TG128: 69.4tok/s median
best 82.6 · worst 47.9
Prefill · PP512: 4,462tok/s median
best 4,656 · worst 2,235

Models: gemma-4-E4B-it, Gemma-4-E4B-It
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: 109.3tok/s median
best 111.0 · worst 84.3
Prefill · PP512: 4,443tok/s median
best 4,564 · worst 4,369

Models: Gemma-4-E4B-It
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
Model	gemma-4-E4B-it, Gemma-4-E4B-It	Gemma-4-E4B-It
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
gemma-4-E4B-it llama.cppQ4_K_M	70.7	110.2	0.64×	2,249	4,406	0.51×	2 / 2
gemma-4-E4B-it llama.cppQ8_0	47.9	84.3	0.57×	2,346	4,564	0.51×	1 / 1

Side A · Apple M5 Pro

Top 7 of 7 runs by decode throughput.

Model / format	Chip / backend	Decode	Prefill	Contributor	Date	Report
basecompute/gemma-4-E4B-it BaseRT 0.2.4Q4	Apple M5 Pro Metal	82.6 TG128	4,656 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/gemma-4-E4B-it BaseRT 0.2.4Q4	Apple M5 Pro Metal	81.9 TG128	4,636 PP512	arki05	11 Sep 2026	View Benchmark
Gemma-4-E4B-It llama.cpp b10809 (5266f24da)Q4_K_M	Apple M5 Pro BLAS + Metal	72.1 TG128	2,263 PP512	arki05	11 Sep 2026	View Benchmark
Gemma-4-E4B-It llama.cpp b10809 (5266f24da)Q4_K_M	Apple M5 Pro BLAS + Metal	69.4 TG128	2,235 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/gemma-4-E4B-it BaseRT 0.2.4Q8	Apple M5 Pro Metal	51.3 TG128	4,490 PP512	arki05	11 Sep 2026	View Benchmark
basecompute/gemma-4-E4B-it BaseRT 0.2.4Q8	Apple M5 Pro Metal	51.0 TG128	4,462 PP512	arki05	11 Sep 2026	View Benchmark
Gemma-4-E4B-It llama.cpp b10809 (5266f24da)Q8_0	Apple M5 Pro BLAS + Metal	47.9 TG128	2,346 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
Gemma-4-E4B-It llama.cpp b10809 (5266f24da)Q4_K_M	AMD Radeon RX 7900 XT ROCm	111.0 TG128	4,443 PP512	arki05	11 Sep 2026	View Benchmark
Gemma-4-E4B-It llama.cpp b10809 (5266f24da)Q4_K_M	AMD Radeon RX 7900 XT ROCm	109.3 TG128	4,369 PP512	arki05	11 Sep 2026	View Benchmark
Gemma-4-E4B-It llama.cpp b10809 (5266f24da)Q8_0	AMD Radeon RX 7900 XT ROCm	84.3 TG128	4,564 PP512	arki05	11 Sep 2026	View Benchmark