Radeon RX 640 vs Radeon 820M

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 Radeon 820M is on rank 62, so the Radeon 820M 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 Radeon 820M

#19

Radeon RX 5600

MSRP: $229|Avg: $150

96%

#22

Radeon RX 7700

MSRP: $449|Avg: $399

92%

#52

Radeon RX 550X (móvel)

MSRP: $35|Avg: $35

203%

#54

GeForce GTX 1070 with Max-Q Design

MSRP: N/A|Avg: $150

184%

#55

GeForce GTX 1060 with Max-Q Design

MSRP: N/A|Avg: $100

183%

#59

GeForce GTX 1050 (Mobile)

MSRP: N/A|Avg: $50

167%

#60

Radeon RX 6300

MSRP: $60|Avg: $40

165%

#62

Radeon 820M

MSRP: N/A|Avg: $25

100%

#65

GeForce GTX 1650 with Max-Q Design

MSRP: N/A|Avg: $100

98%

#66

GeForce GTX 1050 with Max-Q Design

MSRP: N/A|Avg: $50

98%

#68

GeForce GTX 850M

MSRP: N/A|Avg: $40

95%

Based on actual market prices and performance benchmarks.

Performance Comparison

About G3D Mark

🏆 Chipversus Verdict

🚀 Performance Leadership

The Radeon RX 640 is the superior choice for raw performance. It leads with a 1.4% higher G3D Mark score and 100% more VRAM (4 GB vs 2 GB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon 820M.

Insight	Radeon RX 640	Radeon 820M
Performance	✅Leading raw performance (+1.4%)	❌Lower raw frame rates (-1.4%)
Longevity	GCN 4.0 (2016−2020) (14nm)	RDNA 3+ (2024) (4nm)
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

The Radeon 820M offers a compelling cost-to-performance ratio. Priced at $25 versus $55 for the Radeon RX 640, it costs 55% less. While it maintains basic entry-level capabilities, this results in a 117.1% higher cost efficiency score.

Insight	Radeon RX 640	Radeon 820M
Cost Efficiency	❌Lower cost efficiency	✅Better overall value (+117.1%)
Upfront Cost	⚠️Higher upfront cost ($55)	✅More affordable ($25)

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

Radeon 820M Benchmark Check

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Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Radeon RX 640 and Radeon 820M

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.

Radeon 820M

The Radeon 820M is manufactured by AMD. It was released in June 2 2024. It features the RDNA 3+ architecture. The boost clock speed is 2900 MHz. It has 128 shading units. The thermal design power (TDP) is 30W. Manufactured using 4 nm process technology. G3D Mark benchmark score: 2,143 points.

⚡

Graphics Performance

The Radeon RX 640 scores 2,172 and the Radeon 820M reaches 2,143 in the G3D Mark benchmark — just a 1.4% difference, making them near-identical in rasterization performance. The Radeon RX 640 is built on GCN 4.0 while the Radeon 820M uses RDNA 3+, both on 14 nm vs 4 nm. Shader units: 640 (Radeon RX 640) vs 128 (Radeon 820M). Boost clocks: 1218 MHz vs 2900 MHz.

Feature	Radeon RX 640	Radeon 820M
G3D Mark Score	2,172+1%	2,143
Architecture	GCN 4.0	RDNA 3+
Process Node	14 nm	4 nm
Shading Units	640+400%	128
Boost Clock	1218 MHz	2900 MHz+138%

✨

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 Radeon 820M lacks specific hardware/driver support for this native frame generation tier.

Feature	Radeon RX 640	Radeon 820M
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 Radeon 820M has 2 GB. The Radeon RX 640 offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs System.

Feature	Radeon RX 640	Radeon 820M
VRAM Capacity	4 GB+100%	2 GB
Memory Type	GDDR5	Shared
Memory Bandwidth	Unknown	System
Bus Width	128-bit	System

🖥️

Display & API Support

DirectX support: 12 (FL 12_0) (Radeon RX 640) vs 12 Ultimate (Radeon 820M). Vulkan: 1.3 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 6 vs 4.

Feature	Radeon RX 640	Radeon 820M
DirectX	12 (FL 12_0)	12 Ultimate
Vulkan	1.3	1.3
OpenGL	4.6	4.6
Max Displays	6+50%	4

🎬

Media & Encoding

Hardware encoder: VCE 3.4 (Radeon RX 640) vs VCN 4.0 (Radeon 820M). Decoder: UVD 6.3 vs VCN 4.0. Supported codecs: H.264,H.265/HEVC (Radeon RX 640) vs H.264,H.265,AV1,VP9 (Radeon 820M).

Feature	Radeon RX 640	Radeon 820M
Encoder	VCE 3.4	VCN 4.0
Decoder	UVD 6.3	VCN 4.0
Codecs	H.264,H.265/HEVC	H.264,H.265,AV1,VP9

🔌

Power & Dimensions

The Radeon RX 640 draws 50W versus the Radeon 820M's 30W — a 50% difference. The Radeon 820M is more power-efficient. Recommended PSU: 350W (Radeon RX 640) vs 350W (Radeon 820M). Power connectors: PCIe-powered vs PCIe-powered.

Feature	Radeon RX 640	Radeon 820M
TDP	50W	30W-40%
Recommended PSU	350W	350W
Power Connector	PCIe-powered	PCIe-powered
Length	—	0mm
Height	—	0mm
Slots	1	0-100%
Temp (Load)	—	80
Perf/Watt	43.4	71.4+65%

💰

Value Analysis

The Radeon 820M costs 54.5% less ($30 savings) at current market prices. Performance per dollar (G3D Mark / price): 39.5 (Radeon RX 640) vs 85.7 (Radeon 820M) — the Radeon 820M offers 117% better value. The Radeon 820M is the newer GPU (2024 vs 2019).