Radeon HD 7770 vs RadeonT 660M

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 7770 vs RadeonT 660M 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 7770 vs RadeonT 660M: 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 7770

2012

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 13.7 vs 0 G3D/$ ($159 MSRP vs Unknown MSRP).

Trade-offs

❌Lower average FPS than RadeonT 660M across 50 tracked games in our benchmark data.
❌2012 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌100% higher power demand at 80W vs 40W.

RadeonT 660M

2023

Why buy it

✅43.9% 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 80W, a 40W reduction.

Trade-offs

❌Lower G3D Mark per dollar, at 0 vs 13.7 G3D/$ (Unknown MSRP vs $159 MSRP).

Quick Answers

Which GPU is faster for gaming right now?

RadeonT 660M is the faster gaming card right now. In our data, it leads by 43.9% in average FPS across 50 tracked games in our benchmark data and by 2.2% in PassMark G3D (2,221 vs 2,173), so the answer here is pretty clean.

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

RadeonT 660M 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 2012. That gives it the more rounded hardware package for newer games.

Which GPU is the better buy today?

Radeon HD 7770 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 HD 7770 is the easier value choice. If you care more about 1080p and some 1440p headroom, RadeonT 660M has the stronger long-term case.

Radeon HD 7770 vs RadeonT 660M Technical Specifications

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

Radeon HD 7770

The Radeon HD 7770 is manufactured by AMD. It was released in February 15 2012. It features the GCN 1.0 architecture. The core clock speed is 1000 MHz. It has 640 shading units. The thermal design power (TDP) is 80W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,173 points. Launch price was $159.

RadeonT 660M

The RadeonT 660M 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: 2,221 points.

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Graphics Performance

The Radeon HD 7770 scores 2,173 and the RadeonT 660M reaches 2,221 in the G3D Mark benchmark — just a 2.2% difference, making them near-identical in rasterization performance. The Radeon HD 7770 is built on GCN 1.0 while the RadeonT 660M uses RDNA 2.0, both on 28 nm vs 6 nm. Shader units: 640 (Radeon HD 7770) vs 384 (RadeonT 660M). Raw compute: 1.28 TFLOPS (Radeon HD 7770) vs 1.459 TFLOPS (RadeonT 660M).

Feature	Radeon HD 7770	RadeonT 660M
G3D Mark Score	2,173	2,221+2%
Architecture	GCN 1.0	RDNA 2.0
Process Node	28 nm	6 nm
Shading Units	640+67%	384
Compute (TFLOPS)	1.28 TFLOPS	1.459 TFLOPS+14%
ROPs	16	16
TMUs	40+67%	24
L1 Cache	160 KB+25%	128 KB
L2 Cache	0.25 MB	2 MB+700%
Frame Generation	FSR upscaling	FSR upscaling + RSR

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Advanced Features (DLSS/FSR)

Feature	Radeon HD 7770	RadeonT 660M
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)

Both cards ship with 2 GB of GDDR5. Memory bus width is 128-bit on the Radeon HD 7770 and 64-bit on the RadeonT 660M. L2 Cache: 0.25 MB (Radeon HD 7770) vs 2 MB (RadeonT 660M) — the RadeonT 660M has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon HD 7770	RadeonT 660M
VRAM Capacity	2 GB	2 GB
Memory Type	GDDR5	GDDR5
Bus Width	128-bit+100%	64-bit
L2 Cache	0.25 MB	2 MB+700%

🖥️

Display & API Support

DirectX support: 12_0 (Radeon HD 7770) vs 12 (12_2) (RadeonT 660M). Maximum simultaneous displays: 4 vs 3.

Feature	Radeon HD 7770	RadeonT 660M
DirectX	12_0	12 (12_2)
Max Displays	4+33%	3

🎬

Media & Encoding

Hardware encoder: VCE 1.0 (Radeon HD 7770) vs VCN 3.0 (RadeonT 660M). Decoder: UVD 3.1 vs VCN 3.0. Supported codecs: H.264 (Radeon HD 7770) vs H.264,H.265,VP9,AV1,JPEG (RadeonT 660M).

Feature	Radeon HD 7770	RadeonT 660M
Encoder	VCE 1.0	VCN 3.0
Decoder	UVD 3.1	VCN 3.0
Codecs	H.264	H.264,H.265,VP9,AV1,JPEG

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Power & Dimensions

The Radeon HD 7770 draws 80W versus the RadeonT 660M's 40W — a 66.7% difference. The RadeonT 660M is more power-efficient. Recommended PSU: 450W (Radeon HD 7770) vs 350W (RadeonT 660M). Power connectors: 1x 6-pin vs PCIe-powered.

Feature	Radeon HD 7770	RadeonT 660M
TDP	80W	40W-50%
Recommended PSU	450W	350W-22%
Power Connector	1x 6-pin	PCIe-powered
Length	210mm	—
Slots	2	—
Perf/Watt	27.2	55.5+104%

💰

Value Analysis

The newer card here is RadeonT 660M (2023 vs 2012).

Feature	Radeon HD 7770	RadeonT 660M
MSRP	$159	—
Codename	Cape Verde	Rembrandt+
Release	February 15 2012	January 3 2023
Ranking	#664	#565

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