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.

Mobility Radeon HD 3870 X2 vs Radeon HD 7660G 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.

Mobility Radeon HD 3870 X2 vs Radeon HD 7660G: Pros, Cons & Final Verdict

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

Mobility Radeon HD 3870 X2

2008

Why buy it

✅Competitive enough if your priority is price, power, or specific feature preference.

Trade-offs

❌Less VRAM, with 2 MB vs 512 MB for high-resolution textures and newer games.
❌2008 hardware with 2 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌
798% HIGHER MSRP
$449 MSRPvs$50 MSRP
❌Lower G3D Mark per dollar, at 1.1 vs 9.6 G3D/$ ($449 MSRP vs $50 MSRP).
❌144.4% higher power demand at 110W vs 45W.

Radeon HD 7660G

2012

Why buy it

✅Costs $399 less on MSRP ($50 MSRP vs $449 MSRP).
✅Delivers 803.6% more G3D Mark for each dollar spent, at 9.6 vs 1.1 G3D/$ ($50 MSRP vs $449 MSRP).
✅24900% more VRAM for high-resolution textures and newer games (512 MB vs 2 MB).
✅Mobility Radeon HD 3870 X2 is already obsolete for modern gaming, so Radeon HD 7660G is the less risky modern option long term.
✅Draws 45W instead of 110W, a 65W reduction.

Trade-offs

❌2012 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Quick Answers

Which GPU is faster for gaming right now?

Radeon HD 7660G is the faster gaming card right now based on the synthetic data we have. It leads by 0.6% in PassMark G3D (481 vs 478), which is the best performance signal available in this matchup.

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

Radeon HD 7660G is the safer long-term pick for 2026 and beyond. The case is simple: 512 MB vs 2 MB of VRAM, a 40nm process instead of 55nm, and a newer 2012 generation instead of 2008. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

Radeon HD 7660G makes the most sense to buy today. It is $399 cheaper on MSRP at $50 vs $449, and it leads G3D-per-dollar by 803.6% (9.6 vs 1.1), so the value case lines up with the gaming result.

Mobility Radeon HD 3870 X2 vs Radeon HD 7660G Technical Specifications

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

Mobility Radeon HD 3870 X2

The Mobility Radeon HD 3870 X2 is manufactured by AMD. It was released in September 1 2008. It features the TeraScale architecture. The core clock speed is 660 MHz. It has 320 ×2 shading units. The thermal design power (TDP) is 110W. Manufactured using 55 nm process technology. G3D Mark benchmark score: 478 points.

Radeon HD 7660G

The Radeon HD 7660G 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: 481 points.

⚡

Graphics Performance

The Mobility Radeon HD 3870 X2 scores 478 and the Radeon HD 7660G reaches 481 in the G3D Mark benchmark — just a 0.6% difference, making them near-identical in rasterization performance. The Mobility Radeon HD 3870 X2 is built on TeraScale while the Radeon HD 7660G uses TeraScale 2, both on 55 nm vs 40 nm. Shader units: 320 (Mobility Radeon HD 3870 X2) vs 480 (Radeon HD 7660G). Raw compute: 0.4224 TFLOPS ×2 (Mobility Radeon HD 3870 X2) vs 0.576 TFLOPS (Radeon HD 7660G).

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
G3D Mark Score	478	481
Architecture	TeraScale	TeraScale 2
Process Node	55 nm	40 nm
Shading Units	320 ×2	480+50%
Compute (TFLOPS)	0.4224 TFLOPS ×2	0.576 TFLOPS+36%
ROPs	16 ×2+100%	8
TMUs	16 ×2	24+50%
L2 Cache	256 KB	256 KB
Frame Generation	FSR upscaling	FSR upscaling

✨

Advanced Features (DLSS/FSR)

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
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)

The Mobility Radeon HD 3870 X2 has 2 MB of VRAM, while the Radeon HD 7660G carries 512 MB. Radeon HD 7660G gives you 24900% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 64-bit on the Mobility Radeon HD 3870 X2 and 128-bit on the Radeon HD 7660G.

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
VRAM Capacity	0.002 GB	0.5 GB+24900%
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	64-bit	128-bit+100%
L2 Cache	256 KB	256 KB

🖥️

Display & API Support

DirectX support: 10.1 (Mobility Radeon HD 3870 X2) vs 11 (11_0) (Radeon HD 7660G). Maximum simultaneous displays: 0 vs 2.

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
DirectX	10.1	11 (11_0)+9%
Max Displays	0	2

🎬

Media & Encoding

Hardware encoder: UVD (Mobility Radeon HD 3870 X2) vs VCE 1.0 (Radeon HD 7660G). Decoder: UVD vs UVD 3.

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
Encoder	UVD	VCE 1.0
Decoder	UVD	UVD 3
Codecs	—	H.264,VC-1,MPEG-2,DivX

🔌

Power & Dimensions

The Mobility Radeon HD 3870 X2 draws 110W versus the Radeon HD 7660G's 45W — a 83.9% difference. The Radeon HD 7660G is more power-efficient. Recommended PSU: 350W (Mobility Radeon HD 3870 X2) vs 350W (Radeon HD 7660G). Power connectors: PCIe-powered vs 1x 6-pin.

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
TDP	110W	45W-59%
Recommended PSU	350W	350W
Power Connector	PCIe-powered	1x 6-pin
Length	1mm	—
Slots	0	0
Temp (Load)	—	75°C
Perf/Watt	4.3	10.7+149%

💰

Value Analysis

At launch, the Mobility Radeon HD 3870 X2 came in at $449, while the Radeon HD 7660G launched at $50. On MSRP, Radeon HD 7660G was 88.9% cheaper ($399 less). Performance per dollar on MSRP (G3D Mark / MSRP): 1.1 (Mobility Radeon HD 3870 X2) vs 9.6 (Radeon HD 7660G) — the Radeon HD 7660G offers 772.7% better value. The newer card here is Radeon HD 7660G (2012 vs 2008).

Feature	Mobility Radeon HD 3870 X2	Radeon HD 7660G
MSRP	$449	$50-89%
Performance per Dollar	1.1	9.6+773%
Codename	M88	Turks
Release	September 1 2008	January 5 2012
Ranking	#919	#870

Search Mobility Radeon HD 3870 X2 on Amazon

Search Radeon HD 7660G on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.