Radeon RX 640 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.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money. The Radeon RX 640 is positioned at rank 323 and the RadeonT 660M is on rank 226, so the RadeonT 660M offers better cost-efficiency for playing games.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar Radeon RX 640

#313

Radeon RX 550X (móvel)

MSRP: $35|Avg: $35

795%

#315

GeForce GTX 1070 with Max-Q Design

MSRP: N/A|Avg: $150

720%

#316

GeForce GTX 1060 with Max-Q Design

MSRP: N/A|Avg: $100

719%

#320

GeForce GTX 1050 (Mobile)

MSRP: N/A|Avg: $50

653%

#321

Radeon RX 6300

MSRP: $60|Avg: $40

649%

#323

Radeon RX 640

MSRP: $159|Avg: $55

100%

#326

Iris Pro Graphics P580

MSRP: $150|Avg: $60

99%

#327

Radeon E8870PCIe

MSRP: $250|Avg: $200

99%

#330

Arc Graphics 140T

MSRP: $350|Avg: $300

94%

#331

Radeon 680M

MSRP: N/A|Avg: $80

94%

#333

GeForce 730A

MSRP: $60|Avg: $20

93%

#334

GeForce GT 745A

MSRP: $99|Avg: $20

91%

#335

GeForce 710A

MSRP: $35|Avg: $62

91%

#336

Radeon HD 8670D + HD 6670 Dual

MSRP: $100|Avg: $10

89%

#338

GeForce MX230

MSRP: $150|Avg: $150

89%

Based on actual market prices and performance benchmarks.

Performance Per Dollar RadeonT 660M

#53

Radeon RX 6850M XT

MSRP: $800|Avg: $800

97%

#216

Radeon RX 550X (móvel)

MSRP: $35|Avg: $35

484%

#218

GeForce GTX 1070 with Max-Q Design

MSRP: N/A|Avg: $150

439%

#219

GeForce GTX 1060 with Max-Q Design

MSRP: N/A|Avg: $100

438%

#223

GeForce GTX 1050 (Mobile)

MSRP: N/A|Avg: $50

398%

#224

Radeon RX 6300

MSRP: $60|Avg: $40

395%

#226

RadeonT 660M

MSRP: N/A|Avg: N/A

100%

#228

GeForce GT 750M Mac Edition

MSRP: $149|Avg: $40

99%

#230

Maxwell GPU Surface Book

MSRP: $150|Avg: $75

98%

#235

Radeon RX 540

MSRP: $99|Avg: $40

96%

#236

Radeon HD 6750M

MSRP: N/A|Avg: $60

95%

#237

Radeon HD 7570M

MSRP: N/A|Avg: $15

94%

#239

Arc Graphics 130T

MSRP: $300|Avg: $250

92%

#240

GeForce MX570 A

MSRP: $300|Avg: $300

92%

Based on actual market prices and performance benchmarks.

Performance Comparison

About G3D Mark

🏆 Chipversus Verdict

🚀 Performance Leadership

The RadeonT 660M is the superior choice for raw performance. It leads with a 2.3% higher G3D Mark score. However, the Radeon RX 640 offers more VRAM, which may be beneficial for texture-heavy scenarios at higher resolutions.

Insight	Radeon RX 640	RadeonT 660M
Performance	❌Lower raw frame rates (-2.3%)	✅Leading raw performance (+2.3%)
Longevity	GCN 4.0 (2016−2020) (14nm)	RDNA 2.0 (2020−2025) (6nm)
Ecosystem	Supports FSR Upscaling	Supports FSR Upscaling
VRAM	✅ More VRAM (+100%)	❌ Less VRAM capacity
Efficiency	⚡ Higher Power Consumption	💡 Excellent Perf/Watt
Case Fit	—	—

💎 Value Proposition

While current pricing data is unavailable, the RadeonT 660M remains the clear technical winner. Check real-time availability to determine if the performance gap justifies the market price.

Performance Check

Real-world benchmarks and performance projections based on comprehensive hardware analysis and comparative metrics. Values represent expected performance on High/Ultra settings at 1080p, 1440p, and 4K. Modeled using a Ryzen 7 7800X3D reference profile to minimize specific CPU bottlenecks.

Note: Performance behavior can vary per game. Specific architectures may perform better or worse depending on game engine optimizations and API implementation.

Radeon RX 640 Benchmark Check

RadeonT 660M Benchmark Check

Loading...

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Radeon RX 640 and RadeonT 660M

Radeon RX 640

The Radeon RX 640 is manufactured by AMD. It was released in May 13 2019. It features the GCN 4.0 architecture. The core clock ranges from 1082 MHz to 1218 MHz. It has 640 shading units. The thermal design power (TDP) is 50W. Manufactured using 14 nm process technology. G3D Mark benchmark score: 2,172 points.

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.

⚡

Graphics Performance

The Radeon RX 640 scores 2,172 and the RadeonT 660M reaches 2,221 in the G3D Mark benchmark — just a 2.3% difference, making them near-identical in rasterization performance. The Radeon RX 640 is built on GCN 4.0 while the RadeonT 660M uses RDNA 2.0, both on 14 nm vs 6 nm. Shader units: 640 (Radeon RX 640) vs 384 (RadeonT 660M). Raw compute: 1.559 TFLOPS (Radeon RX 640) vs 1.459 TFLOPS (RadeonT 660M). Boost clocks: 1218 MHz vs 1900 MHz.

Feature	Radeon RX 640	RadeonT 660M
G3D Mark Score	2,172	2,221+2%
Architecture	GCN 4.0	RDNA 2.0
Process Node	14 nm	6 nm
Shading Units	640+67%	384
Compute (TFLOPS)	1.559 TFLOPS+7%	1.459 TFLOPS
Boost Clock	1218 MHz	1900 MHz+56%
ROPs	16	16
TMUs	40+67%	24
L1 Cache	160 KB+25%	128 KB
L2 Cache	0.5 MB	2 MB+300%

✨

Advanced Features (DLSS/FSR)

A critical advantage for the Radeon RX 640 is support for FSR 3 / AFMF. This allows it to generate entire frames using AI/Algorithms, essentially doubling the frame rate in CPU-bound scenarios or heavy ray-tracing titles. The RadeonT 660M lacks specific hardware/driver support for this native frame generation tier.

Feature	Radeon RX 640	RadeonT 660M
Upscaling Tech	FSR 3 (Native)	FSR 1.0 (Software)
Frame Generation	FSR 3 / AFMF (Driver)	Not Supported
Ray Reconstruction	No	No
Low Latency	AMD Anti-Lag	AMD Anti-Lag

💾

Video Memory (VRAM)

The Radeon RX 640 comes with 4 GB of VRAM, while the RadeonT 660M has 2 GB. The Radeon RX 640 offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 64-bit. L2 Cache: 0.5 MB (Radeon RX 640) vs 2 MB (RadeonT 660M) — the RadeonT 660M has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon RX 640	RadeonT 660M
VRAM Capacity	4 GB+100%	2 GB
Memory Type	GDDR5	GDDR5
Bus Width	128-bit+100%	64-bit
L2 Cache	0.5 MB	2 MB+300%

🖥️

Display & API Support

DirectX support: 12 (FL 12_0) (Radeon RX 640) vs 12 (12_2) (RadeonT 660M). Vulkan: 1.3 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 6 vs 3.

Feature	Radeon RX 640	RadeonT 660M
DirectX	12 (FL 12_0)	12 (12_2)
Vulkan	1.3	1.3
OpenGL	4.6	4.6
Max Displays	6+100%	3

🎬

Media & Encoding

Hardware encoder: VCE 3.4 (Radeon RX 640) vs VCN 3.0 (RadeonT 660M). Decoder: UVD 6.3 vs VCN 3.0. Supported codecs: H.264,H.265/HEVC (Radeon RX 640) vs H.264,H.265,VP9,AV1,JPEG (RadeonT 660M).

Feature	Radeon RX 640	RadeonT 660M
Encoder	VCE 3.4	VCN 3.0
Decoder	UVD 6.3	VCN 3.0
Codecs	H.264,H.265/HEVC	H.264,H.265,VP9,AV1,JPEG

🔌

Power & Dimensions

The Radeon RX 640 draws 50W versus the RadeonT 660M's 40W — a 22.2% difference. The RadeonT 660M is more power-efficient. Recommended PSU: 350W (Radeon RX 640) vs 350W (RadeonT 660M). Power connectors: PCIe-powered vs PCIe-powered.