GeForce GTX 670MX SLI 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.

GeForce GTX 670MX SLI 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.

GeForce GTX 670MX SLI 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.

GeForce GTX 670MX SLI

2012

Why buy it

✅34.1% more average FPS across 50 tracked games in our benchmark data.

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).
❌2012 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌Lower G3D Mark per dollar, at 0 vs 13.7 G3D/$ (Unknown MSRP vs $159 MSRP).
❌200% higher power demand at 150W vs 50W.

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).
✅GeForce GTX 670MX SLI is already obsolete for modern gaming, so Radeon RX 640 is the less risky modern option long term.
✅Draws 50W instead of 150W, a 100W reduction.

Trade-offs

❌Lower average FPS than GeForce GTX 670MX SLI across 50 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.

Quick Answers

Which GPU is faster for gaming right now?

GeForce GTX 670MX SLI is the faster gaming card right now. In our data, it leads by 34.1% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward Radeon RX 640 instead at 2,172 vs 2,075, 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 RX 640 is the safer long-term pick for 2026 and beyond. The case is simple: 4 GB vs 2 GB of VRAM, the newer feature stack, with FSR 3 (2023) and FSR Frame Generation + AFMF (2023), while GeForce GTX 670MX SLI is limited to no meaningful modern upscaling stack and no comparable frame-generation support, a 14nm process instead of 28nm, and a newer 2019 generation instead of 2012. That gives it more room for heavier textures and higher settings over time.

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. GeForce GTX 670MX SLI still makes more sense if max raw gaming performance matters more than value.

GeForce GTX 670MX SLI vs Radeon RX 640 Technical Specifications

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

GeForce GTX 670MX SLI

The GeForce GTX 670MX SLI is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is 600 MHz. It has 1920 shading units. The thermal design power (TDP) is 150W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,075 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.

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Graphics Performance

The GeForce GTX 670MX SLI scores 2,075 and the Radeon RX 640 reaches 2,172 in the G3D Mark benchmark — just a 4.7% difference, making them near-identical in rasterization performance. The GeForce GTX 670MX SLI is built on Kepler while the Radeon RX 640 uses GCN 4.0, both on 28 nm vs 14 nm. Shader units: 1,920 (GeForce GTX 670MX SLI) vs 640 (Radeon RX 640).

Feature	GeForce GTX 670MX SLI	Radeon RX 640
G3D Mark Score	2,075	2,172+5%
Architecture	Kepler	GCN 4.0
Process Node	28 nm	14 nm
Shading Units	1920+200%	640

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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 GeForce GTX 670MX SLI does not have comparable native support in the same tier.The GeForce GTX 670MX SLI gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon RX 640 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GTX 670MX SLI	Radeon RX 640
Upscaling Tech	Upscaling support	FSR 3
Frame Generation	Not Supported	FSR Frame Generation + AFMF
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	AMD Anti-Lag

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Video Memory (VRAM)

The GeForce GTX 670MX SLI 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 128-bit on the GeForce GTX 670MX SLI and 128-bit on the Radeon RX 640.

Feature	GeForce GTX 670MX SLI	Radeon RX 640
VRAM Capacity	2 GB	4 GB+100%
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit	128-bit

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Display & API Support

DirectX support: 12 (11_0) (GeForce GTX 670MX SLI) vs 12 (FL 12_0) (Radeon RX 640). Vulkan: 1.2 vs 1.3. OpenGL: 4.2 vs 4.6. Maximum simultaneous displays: 4 vs 6.

Feature	GeForce GTX 670MX SLI	Radeon RX 640
DirectX	12 (11_0)	12 (FL 12_0)
Vulkan	1.2	1.3+8%
OpenGL	4.2	4.6+10%
Max Displays	4	6+50%

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Media & Encoding

Hardware encoder: NVENC 1st Gen (GeForce GTX 670MX SLI) vs VCE 3.4 (Radeon RX 640). Decoder: PureVideo HD VP5 vs UVD 6.3. Supported codecs: H.264,VC-1,MPEG-2,MPEG-4 ASP (GeForce GTX 670MX SLI) vs H.264,H.265/HEVC (Radeon RX 640).

Feature	GeForce GTX 670MX SLI	Radeon RX 640
Encoder	NVENC 1st Gen	VCE 3.4
Decoder	PureVideo HD VP5	UVD 6.3
Codecs	H.264,VC-1,MPEG-2,MPEG-4 ASP	H.264,H.265/HEVC

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Power & Dimensions

The GeForce GTX 670MX SLI draws 150W versus the Radeon RX 640's 50W — a 100% difference. The Radeon RX 640 is more power-efficient. Recommended PSU: 350W (GeForce GTX 670MX SLI) vs 350W (Radeon RX 640). Power connectors: 1x 6-pin vs PCIe-powered.

Feature	GeForce GTX 670MX SLI	Radeon RX 640
TDP	150W	50W-67%
Recommended PSU	350W	350W
Power Connector	1x 6-pin	PCIe-powered
Slots	0-100%	1
Temp (Load)	88°C	—
Perf/Watt	13.8	43.4+214%

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Value Analysis

The newer card here is Radeon RX 640 (2019 vs 2012).

Feature	GeForce GTX 670MX SLI	Radeon RX 640
MSRP	—	$159
Codename	N13E-GR	Polaris 23
Release	October 1 2012	May 13 2019
Ranking	#513	#665

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