Radeon HD 7660D vs Radeon R5 M420

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 7660D vs Radeon R5 M420 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 7660D vs Radeon R5 M420: 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 7660D

2012

Why buy it

✅Costs $178 less on MSRP ($122 MSRP vs $300 MSRP).
✅Delivers 149.8% more G3D Mark for each dollar spent, at 4.2 vs 1.7 G3D/$ ($122 MSRP vs $300 MSRP).
✅Draws 45W instead of 75W, a 30W reduction.

Trade-offs

❌Lower average FPS than Radeon R5 M420 across 50 tracked games in our benchmark data.
❌2012 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Radeon R5 M420

2016

Why buy it

✅20.4% more average FPS across 50 tracked games in our benchmark data.
✅More future proof: GCN 2.0 (2013−2017) on 28nm with a newer platform for upcoming games.

Trade-offs

❌2016 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌
145.9% HIGHER MSRP
$300 MSRPvs$122 MSRP
❌Lower G3D Mark per dollar, at 1.7 vs 4.2 G3D/$ ($300 MSRP vs $122 MSRP).
❌66.7% higher power demand at 75W vs 45W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon R5 M420 is the faster gaming card right now. In our data, it leads by 20.4% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward Radeon HD 7660D instead at 512 vs 504, 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 HD 7660D 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 HD 7660D makes the most sense to buy today. It is $178 cheaper on MSRP at $122 vs $300, and it leads G3D-per-dollar by 149.8% (4.2 vs 1.7), which is enough to swing the recommendation its way. Radeon R5 M420 still makes more sense if max raw gaming performance matters more than value.

Radeon HD 7660D vs Radeon R5 M420 Technical Specifications

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

Radeon HD 7660D

The Radeon HD 7660D is manufactured by AMD. It was released in January 5 2012. It features the TeraScale 2 architecture. The core clock speed is 600 MHz. It has 480 shading units. The thermal design power (TDP) is 45W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 512 points.

Radeon R5 M420

The Radeon R5 M420 is manufactured by AMD. It was released in May 15 2016. It features the GCN 2.0 architecture. The core clock ranges from 900 MHz to 1000 MHz. It has 768 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 504 points.

⚡

Graphics Performance

The Radeon HD 7660D scores 512 and the Radeon R5 M420 reaches 504 in the G3D Mark benchmark — just a 1.6% difference, making them near-identical in rasterization performance. The Radeon HD 7660D is built on TeraScale 2 while the Radeon R5 M420 uses GCN 2.0, both on 40 nm vs 28 nm. Shader units: 480 (Radeon HD 7660D) vs 768 (Radeon R5 M420). Raw compute: 0.576 TFLOPS (Radeon HD 7660D) vs 1.536 TFLOPS (Radeon R5 M420).

Feature	Radeon HD 7660D	Radeon R5 M420
G3D Mark Score	512+2%	504
Architecture	TeraScale 2	GCN 2.0
Process Node	40 nm	28 nm
Shading Units	480	768+60%
Compute (TFLOPS)	0.576 TFLOPS	1.536 TFLOPS+167%
ROPs	8	16+100%
TMUs	24	48+100%
L1 Cache	48 KB	192 KB+300%
L2 Cache	256 KB	256 KB
Frame Generation	FSR upscaling	FSR upscaling

✨

Advanced Features (DLSS/FSR)

Feature	Radeon HD 7660D	Radeon R5 M420
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

💾

Video Memory (VRAM)

Both cards ship with 512 MB of GDDR5. Memory bus width is 128-bit on the Radeon HD 7660D and 128-bit on the Radeon R5 M420.

Feature	Radeon HD 7660D	Radeon R5 M420
VRAM Capacity	0.5 GB	0.5 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit	128-bit
L2 Cache	256 KB	256 KB

🖥️

Display & API Support

DirectX support: 11 (11_2) (Radeon HD 7660D) vs 12 (11_1) (Radeon R5 M420). OpenGL: 4.4 vs 4.6. Maximum simultaneous displays: 3 vs 2.

Feature	Radeon HD 7660D	Radeon R5 M420
DirectX	11 (11_2)	12 (11_1)+9%
OpenGL	4.4	4.6+5%
Max Displays	3+50%	2

🎬

Media & Encoding

Hardware encoder: VCE 1.0 (Radeon HD 7660D) vs VCE 1.0 (Radeon R5 M420). Decoder: UVD 3 vs UVD 4.0. Supported codecs: H.264,VC-1,MPEG-2,MPEG-4 (Radeon HD 7660D) vs H.264,MPEG-4,VC-1,MPEG-2 (Radeon R5 M420).

Feature	Radeon HD 7660D	Radeon R5 M420
Encoder	VCE 1.0	VCE 1.0
Decoder	UVD 3	UVD 4.0
Codecs	H.264,VC-1,MPEG-2,MPEG-4	H.264,MPEG-4,VC-1,MPEG-2

🔌

Power & Dimensions

The Radeon HD 7660D draws 45W versus the Radeon R5 M420's 75W — a 50% difference. The Radeon HD 7660D is more power-efficient. Recommended PSU: 350W (Radeon HD 7660D) vs 350W (Radeon R5 M420). Power connectors: 1x 6-pin vs Mobile. Typical load temperature: 70°C vs 80.

Feature	Radeon HD 7660D	Radeon R5 M420
TDP	45W-40%	75W
Recommended PSU	350W	350W
Power Connector	1x 6-pin	Mobile
Length	—	0mm
Height	—	0mm
Slots	0	0
Temp (Load)	70°C-13%	80
Perf/Watt	11.4+70%	6.7

💰

Value Analysis

At launch, the Radeon HD 7660D came in at $122, while the Radeon R5 M420 launched at $300. On MSRP, Radeon HD 7660D was 59.3% cheaper ($178 less). Performance per dollar on MSRP (G3D Mark / MSRP): 4.2 (Radeon HD 7660D) vs 1.7 (Radeon R5 M420) — the Radeon HD 7660D offers 147.1% better value. The newer card here is Radeon R5 M420 (2016 vs 2012).

Feature	Radeon HD 7660D	Radeon R5 M420
MSRP	$122-59%	$300
Performance per Dollar	4.2+147%	1.7
Codename	Turks	Emerald
Release	January 5 2012	May 15 2016
Ranking	#870	#649

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