Radeon 820M vs Radeon RX 640

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 820M vs Radeon RX 640 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 820M vs Radeon RX 640: 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 820M

2024

Why buy it

✅32.9% more average FPS across 33 tracked games in our benchmark data.
✅Better long-term bet: RDNA 3+ (2024) on 4nm gives it a newer hardware base for upcoming games.
✅Draws 30W instead of 50W, a 20W reduction.

Trade-offs

❌Less VRAM, with 2 GB vs 4 GB for high-resolution textures and newer games.
❌No equivalent frame-generation stack like FSR Frame Generation + AFMF (2023).
❌Lower G3D Mark per dollar, at 0 vs 13.7 G3D/$ (Unknown MSRP vs $159 MSRP).

Radeon RX 640

2019

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 13.7 vs 0 G3D/$ ($159 MSRP vs Unknown MSRP).
✅Access to a newer frame-generation stack with FSR Frame Generation + AFMF (2023).
✅100% more VRAM for high-resolution textures and newer games (4 GB vs 2 GB).

Trade-offs

❌Lower average FPS than Radeon 820M across 33 tracked games in our benchmark data.
❌Older hardware, 4 GB of VRAM, and weaker feature support mean it will age faster in newer AAA releases.
❌66.7% higher power demand at 50W vs 30W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon 820M is the faster gaming card right now. In our data, it leads by 32.9% in average FPS across 33 tracked games in our benchmark data. PassMark G3D leans toward Radeon RX 640 instead at 2,172 vs 2,143, 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 820M is the safer long-term pick for 2026 and beyond. The case is simple: the newer upscaling stack, FSR Upscaling / FSR 4 (2025) instead of FSR 3 (2023), a 4nm process instead of 14nm, and a newer 2024 generation instead of 2019. That makes it the less risky pick as game demands keep moving.

Which GPU is the better buy today?

Radeon RX 640 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 RX 640 is the easier value choice. If you care more about 1080p and some 1440p headroom, Radeon 820M has the stronger long-term case.

Radeon 820M vs Radeon RX 640 Technical Specifications

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

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.

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.

⚡

Graphics Performance

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

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

✨

Advanced Features (DLSS/FSR)

The clearest feature edge for the Radeon RX 640 is support for FSR Frame Generation + AFMF. In games that support it, that can smooth out motion and lift perceived FPS. The Radeon 820M does not have comparable native support in the same tier.

Feature	Radeon 820M	Radeon RX 640
Upscaling Tech	FSR Upscaling / FSR 4	FSR 3
Frame Generation	Not Supported	FSR Frame Generation + AFMF
Ray Reconstruction	No	No
Low Latency	AMD Anti-Lag	AMD Anti-Lag

💾

Video Memory (VRAM)

The Radeon 820M has 2 GB of VRAM, while the Radeon RX 640 carries 4 GB. Radeon RX 640 gives you 100% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is System on the Radeon 820M and 128-bit on the Radeon RX 640.

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

🖥️

Display & API Support

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

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

🎬

Media & Encoding

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

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

🔌

Power & Dimensions

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

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

💰

Value Analysis

The newer card here is Radeon 820M (2024 vs 2019).

Feature	Radeon 820M	Radeon RX 640
MSRP	—	$159
Codename	Krackan Point	Polaris 23
Release	June 2 2024	May 13 2019
Ranking	#669	#665

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