Radeon 6600M vs Radeon R5 M255

G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

Radeon 6600M vs Radeon R5 M255 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with Ryzen 7 9800X3D to isolate GPU performance.

Search any supported game below to compare 1080p FPS for both components.

Radeon 6600M vs Radeon R5 M255: Pros, Cons & Final Verdict

See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.

Radeon 6600M

2023

Why buy it

✅26.4% more average FPS across 50 tracked games in our benchmark data.
✅Better long-term bet: RDNA 2.0 (2020−2025) on 6nm gives it a newer hardware base for upcoming games.
✅Draws 40W instead of 75W, a 35W reduction.

Trade-offs

❌Less VRAM, with 512 MB vs 4 GB for high-resolution textures and newer games.
❌Lower G3D Mark per dollar, at 0 vs 3.6 G3D/$ (Unknown MSRP vs $150 MSRP).

Radeon R5 M255

2014

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 3.6 vs 0 G3D/$ ($150 MSRP vs Unknown MSRP).
✅700% more VRAM for high-resolution textures and newer games (4 GB vs 512 MB).

Trade-offs

❌Lower average FPS than Radeon 6600M across 50 tracked games in our benchmark data.
❌2014 hardware with 4 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌87.5% higher power demand at 75W vs 40W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon 6600M is the faster gaming card right now. In our data, it leads by 26.4% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward Radeon R5 M255 instead at 543 vs 536, so for this question the real-game FPS result matters more than the synthetic split.

Which GPU is the safer long-term pick for 2026 and beyond?

Radeon 6600M is the safer long-term pick for 2026 and beyond. The case is simple: a 6nm process instead of 28nm, 6 vs 0 ray-tracing units, and a newer 2023 generation instead of 2014. That gives it the more rounded hardware package for newer games.

Which GPU is the better buy today?

Radeon R5 M255 makes the most sense today based on the pricing and value data we have for this matchup. If you are mainly targeting 1080p and some 1440p, Radeon R5 M255 is the easier value choice. If you care more about 1080p and some 1440p headroom, Radeon 6600M has the stronger long-term case.

Radeon 6600M vs Radeon R5 M255 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Radeon 6600M

The Radeon 6600M is manufactured by AMD. It was released in January 3 2023. It features the RDNA 2.0 architecture. The core clock ranges from 1500 MHz to 1900 MHz. It has 384 shading units. The thermal design power (TDP) is 40W. Manufactured using 6 nm process technology. It features 6 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 536 points.

Radeon R5 M255

The Radeon R5 M255 is manufactured by AMD. It was released in January 28 2014. It features the GCN 1.0 architecture. The core clock ranges from 900 MHz to 925 MHz. It has 640 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 543 points. Launch price was $799.99.

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Graphics Performance

The Radeon 6600M scores 536 and the Radeon R5 M255 reaches 543 in the G3D Mark benchmark — just a 1.3% difference, making them near-identical in rasterization performance. The Radeon 6600M is built on RDNA 2.0 while the Radeon R5 M255 uses GCN 1.0, both on 6 nm vs 28 nm. Shader units: 384 (Radeon 6600M) vs 640 (Radeon R5 M255). Raw compute: 1.459 TFLOPS (Radeon 6600M) vs 1.184 TFLOPS (Radeon R5 M255). Boost clocks: 1900 MHz vs 925 MHz.

Feature	Radeon 6600M	Radeon R5 M255
G3D Mark Score	536	543+1%
Architecture	RDNA 2.0	GCN 1.0
Process Node	6 nm	28 nm
Shading Units	384	640+67%
Compute (TFLOPS)	1.459 TFLOPS+23%	1.184 TFLOPS
Boost Clock	1900 MHz+105%	925 MHz
ROPs	16	16
TMUs	24	40+67%
L1 Cache	128 KB	160 KB+25%
L2 Cache	2 MB+700%	0.25 MB
Frame Generation	FSR upscaling + RSR	FSR upscaling

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Advanced Features (DLSS/FSR)

Feature	Radeon 6600M	Radeon R5 M255
Upscaling Tech	FSR Upscaling / FSR 4	FSR Upscaling / FSR 4
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	AMD Anti-Lag	AMD Anti-Lag

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Video Memory (VRAM)

The Radeon 6600M has 512 MB of VRAM, while the Radeon R5 M255 carries 4 GB. Radeon R5 M255 gives you 700% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is System on the Radeon 6600M and 128-bit on the Radeon R5 M255. L2 Cache: 2 MB (Radeon 6600M) vs 0.25 MB (Radeon R5 M255) — the Radeon 6600M has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon 6600M	Radeon R5 M255
VRAM Capacity	0.5 GB	4 GB+700%
Memory Type	Shared	GDDR5
Memory Bandwidth	System	Unknown
Bus Width	System	128-bit
L2 Cache	2 MB+700%	0.25 MB

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Power & Dimensions

The Radeon 6600M draws 40W versus the Radeon R5 M255's 75W — a 60.9% difference. The Radeon 6600M is more power-efficient. Recommended PSU: 350W (Radeon 6600M) vs 350W (Radeon R5 M255). Power connectors: PCIe-powered vs Mobile.

Feature	Radeon 6600M	Radeon R5 M255
TDP	40W-47%	75W
Recommended PSU	350W	350W
Power Connector	PCIe-powered	Mobile
Slots	—	0
Temp (Load)	—	80°C
Perf/Watt	13.4+86%	7.2

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Value Analysis

The newer card here is Radeon 6600M (2023 vs 2014).

Feature	Radeon 6600M	Radeon R5 M255
MSRP	—	$150
Codename	Rembrandt+	Venus
Release	January 3 2023	January 28 2014
Ranking	#565	#851

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