Radeon HD 7770M vs Radeon R9 255

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 HD 7770M vs Radeon R9 255 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 HD 7770M vs Radeon R9 255: 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 HD 7770M

2012

Why buy it

✅Draws 32W instead of 190W, a 158W reduction.

Trade-offs

❌Lower average FPS than Radeon R9 255 across 50 tracked games in our benchmark data.
❌Less VRAM, with 512 MB vs 2 GB for high-resolution textures and newer games.
❌2012 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌Lower G3D Mark per dollar, at 0 vs 10.8 G3D/$ (Unknown MSRP vs $139 MSRP).

Radeon R9 255

2014

Why buy it

✅142.9% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 10.8 vs 0 G3D/$ ($139 MSRP vs Unknown MSRP).
✅300% more VRAM for high-resolution textures and newer games (2 GB vs 512 MB).

Trade-offs

❌2014 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌493.8% higher power demand at 190W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon R9 255 is the faster gaming card right now. In our data, it leads by 142.9% in average FPS across 50 tracked games in our benchmark data and by 0.1% in PassMark G3D (1,501 vs 1,500), so the answer here is pretty clean.

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

Radeon HD 7770M is the safer long-term pick for 2026 and beyond because it comes out ahead on the available hardware-headroom signals for this matchup.

Which GPU is the better buy today?

Radeon R9 255 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 R9 255 is the easier value choice. If you care more about 1080p and some 1440p headroom, Radeon HD 7770M has the stronger long-term case.

Radeon HD 7770M vs Radeon R9 255 Technical Specifications

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

Radeon HD 7770M

The Radeon HD 7770M is manufactured by AMD. It was released in April 24 2012. It features the GCN 1.0 architecture. The core clock speed is 675 MHz. It has 512 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,500 points.

Radeon R9 255

The Radeon R9 255 is manufactured by AMD. It was released in September 2 2014. It features the GCN 3.0 architecture. The core clock speed is 918 MHz. It has 1792 shading units. The thermal design power (TDP) is 190W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,501 points. Launch price was $249.

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Graphics Performance

The Radeon HD 7770M scores 1,500 and the Radeon R9 255 reaches 1,501 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The Radeon HD 7770M is built on GCN 1.0 while the Radeon R9 255 uses GCN 3.0, both on a 28 nm process. Shader units: 512 (Radeon HD 7770M) vs 1,792 (Radeon R9 255). Raw compute: 0.6912 TFLOPS (Radeon HD 7770M) vs 3.29 TFLOPS (Radeon R9 255).

Feature	Radeon HD 7770M	Radeon R9 255
G3D Mark Score	1,500	1,501
Architecture	GCN 1.0	GCN 3.0
Process Node	28 nm	28 nm
Shading Units	512	1792+250%
Compute (TFLOPS)	0.6912 TFLOPS	3.29 TFLOPS+376%
ROPs	16	32+100%
TMUs	32	112+250%
L1 Cache	128 KB	448 KB+250%
L2 Cache	256 KB	512 KB+100%
Frame Generation	FSR upscaling	FSR upscaling

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Advanced Features (DLSS/FSR)

Feature	Radeon HD 7770M	Radeon R9 255
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 HD 7770M has 512 MB of VRAM, while the Radeon R9 255 carries 2 GB. Radeon R9 255 gives you 300% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is System on the Radeon HD 7770M and 128-bit on the Radeon R9 255. L2 Cache: 256 KB (Radeon HD 7770M) vs 512 KB (Radeon R9 255) — the Radeon R9 255 has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon HD 7770M	Radeon R9 255
VRAM Capacity	0.5 GB	2 GB+300%
Memory Type	Shared	GDDR5
Memory Bandwidth	System	Unknown
Bus Width	System	128-bit
L2 Cache	256 KB	512 KB+100%

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Power & Dimensions

The Radeon HD 7770M draws 32W versus the Radeon R9 255's 190W — a 142.3% difference. The Radeon HD 7770M is more power-efficient. Recommended PSU: 350W (Radeon HD 7770M) vs 400W (Radeon R9 255). Power connectors: 1x 6-pin vs 1x 6-pin.

Feature	Radeon HD 7770M	Radeon R9 255
TDP	32W-83%	190W
Recommended PSU	350W-13%	400W
Power Connector	1x 6-pin	1x 6-pin
Perf/Watt	46.9+494%	7.9

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Value Analysis

The newer card here is Radeon R9 255 (2014 vs 2012).

Feature	Radeon HD 7770M	Radeon R9 255
MSRP	—	$139
Codename	Chelsea	Tonga
Release	April 24 2012	September 2 2014
Ranking	#794	#365

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