GeForce GT 640M vs Radeon Vega 3

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.

GeForce GT 640M vs Radeon Vega 3 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.

GeForce GT 640M vs Radeon Vega 3: Pros, Cons & Final Verdict

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

GeForce GT 640M

2012

Why buy it

✅100+% more VRAM for high-resolution textures and newer games (2 GB vs Unknown).
✅Draws 32W instead of 45W, a 13W reduction.

Trade-offs

❌Lower average FPS than Radeon Vega 3 across 50 tracked games in our benchmark data.
❌2012 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Radeon Vega 3

2021

Why buy it

✅60.9% more average FPS across 50 tracked games in our benchmark data.
✅GeForce GT 640M is already obsolete for modern gaming, so Radeon Vega 3 is the less risky modern option long term.
✅More future proof: GCN 5.1 (2018−2022) on 7nm with a newer platform for upcoming games.

Trade-offs

❌Less VRAM, with Unknown vs 2 GB for high-resolution textures and newer games.
❌2021 hardware with Unknown of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌40.6% higher power demand at 45W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon Vega 3 is the faster gaming card right now. In our data, it leads by 60.9% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward GeForce GT 640M instead at 907 vs 892, 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 Vega 3 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 no meaningful modern upscaling stack, a 7nm process instead of 28nm, and a newer 2021 generation instead of 2012. That makes it the less risky pick as game demands keep moving.

Which GPU is the better buy today?

Radeon Vega 3 makes the most sense today based on the pricing and value data we have for this matchup.

GeForce GT 640M vs Radeon Vega 3 Technical Specifications

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

GeForce GT 640M

The GeForce GT 640M is manufactured by NVIDIA. It was released in March 22 2012. It features the Kepler architecture. The core clock ranges from Up to 625 MHz to 645 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 907 points.

Radeon Vega 3

The Radeon Vega 3 is manufactured by AMD. It was released in April 13 2021. It features the GCN 5.1 architecture. The core clock ranges from 300 MHz to 1900 MHz. It has 448 shading units. The thermal design power (TDP) is 45W. Manufactured using 7 nm process technology. G3D Mark benchmark score: 892 points.

⚡

Graphics Performance

The GeForce GT 640M scores 907 and the Radeon Vega 3 reaches 892 in the G3D Mark benchmark — just a 1.7% difference, making them near-identical in rasterization performance. The GeForce GT 640M is built on Kepler while the Radeon Vega 3 uses GCN 5.1, both on 28 nm vs 7 nm. Shader units: 384 (GeForce GT 640M) vs 448 (Radeon Vega 3). Raw compute: 0.48 TFLOPS (GeForce GT 640M) vs 1.702 TFLOPS (Radeon Vega 3). Boost clocks: 645 MHz vs 1900 MHz.

Feature	GeForce GT 640M	Radeon Vega 3
G3D Mark Score	907+2%	892
Architecture	Kepler	GCN 5.1
Process Node	28 nm	7 nm
Shading Units	384	448+17%
Compute (TFLOPS)	0.48 TFLOPS	1.702 TFLOPS+255%
Boost Clock	645 MHz	1900 MHz+195%
ROPs	16+100%	8
TMUs	32+14%	28

✨

Advanced Features (DLSS/FSR)

The GeForce GT 640M gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon Vega 3 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GT 640M	Radeon Vega 3
Upscaling Tech	Upscaling support	FSR Upscaling / FSR 4
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	AMD Anti-Lag

💾

Video Memory (VRAM)

The GeForce GT 640M has 2 GB of VRAM, while the Radeon Vega 3 carries 0 MB. GeForce GT 640M gives you 100+% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 128-bit on the GeForce GT 640M and System on the Radeon Vega 3.

Feature	GeForce GT 640M	Radeon Vega 3
VRAM Capacity	2 GB	Shared System RAM
Memory Type	GDDR5	Shared
Memory Bandwidth	Unknown	System
Bus Width	128-bit	System

🖥️

Display & API Support

DirectX support: 11.0 (GeForce GT 640M) vs 12 (FL 12_1) (Radeon Vega 3). OpenGL: 4.5 vs 4.6. Maximum simultaneous displays: 1 vs 4.

Feature	GeForce GT 640M	Radeon Vega 3
DirectX	11.0	12 (FL 12_1)+9%
OpenGL	4.5	4.6+2%
Max Displays	1	4+300%

🎬

Media & Encoding

Hardware encoder: NVENC 1.0 (GeForce GT 640M) vs VCN 1.0 (Radeon Vega 3). Decoder: PureVideo HD VP5 vs VCN 1.0. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 640M) vs H.264,H.265/HEVC,AV1 (Radeon Vega 3).

Feature	GeForce GT 640M	Radeon Vega 3
Encoder	NVENC 1.0	VCN 1.0
Decoder	PureVideo HD VP5	VCN 1.0
Codecs	MPEG-2,H.264,VC-1,MPEG-4 ASP	H.264,H.265/HEVC,AV1

🔌

Power & Dimensions

The GeForce GT 640M draws 32W versus the Radeon Vega 3's 45W — a 33.8% difference. The GeForce GT 640M is more power-efficient. Recommended PSU: 350W (GeForce GT 640M) vs 1W (Radeon Vega 3). Power connectors: PCIe-powered vs Integrated.

Feature	GeForce GT 640M	Radeon Vega 3
TDP	32W-29%	45W
Recommended PSU	350W	1W-100%
Power Connector	PCIe-powered	Integrated
Length	0mm	—
Height	0mm	—
Slots	0	0
Temp (Load)	70°C	—
Perf/Watt	28.3+43%	19.8

💰

Value Analysis

The newer card here is Radeon Vega 3 (2021 vs 2012).

Feature	GeForce GT 640M	Radeon Vega 3
MSRP	—	$0
Codename	GK107	Cezanne
Release	March 22 2012	April 13 2021
Ranking	#909	#601

Search GeForce GT 640M on Amazon

Search Radeon Vega 3 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.