GeForce GTX 680MX vs Radeon 840M

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 680MX vs Radeon 840M 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 680MX vs Radeon 840M: 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 680MX

2012

Why buy it

✅100% more VRAM for high-resolution textures and newer games (4 GB vs 2 GB).

Trade-offs

❌Lower average FPS than Radeon 840M across 20 tracked games in our benchmark data.
❌2012 hardware with 4 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌306.7% higher power demand at 122W vs 30W.

Radeon 840M

2024

Why buy it

✅6.6% more average FPS across 20 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 122W, a 92W reduction.

Trade-offs

❌Less VRAM, with 2 GB vs 4 GB for high-resolution textures and newer games.

Quick Answers

Which GPU is faster for gaming right now?

Radeon 840M is the faster gaming card right now. In our data, it leads by 6.6% in average FPS across 20 tracked games in our benchmark data and by 0.1% in PassMark G3D (3,803 vs 3,799), so the answer here is pretty clean.

Which GPU is the safer long-term pick for 2026 and beyond?

Radeon 840M 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 4nm process instead of 28nm, and a newer 2024 generation instead of 2012. That makes it the less risky pick as game demands keep moving.

Which GPU is the better buy today?

Radeon 840M makes the most sense today based on the pricing and value data we have for this matchup.

GeForce GTX 680MX vs Radeon 840M Technical Specifications

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

GeForce GTX 680MX

The GeForce GTX 680MX is manufactured by NVIDIA. It was released in October 23 2012. It features the Kepler architecture. The core clock speed is 720 MHz. It has 1536 shading units. The thermal design power (TDP) is 122W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 3,799 points.

Radeon 840M

The Radeon 840M 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 256 shading units. The thermal design power (TDP) is 30W. Manufactured using 4 nm process technology. G3D Mark benchmark score: 3,803 points.

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Graphics Performance

The GeForce GTX 680MX scores 3,799 and the Radeon 840M reaches 3,803 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GTX 680MX is built on Kepler while the Radeon 840M uses RDNA 3+, both on 28 nm vs 4 nm. Shader units: 1,536 (GeForce GTX 680MX) vs 256 (Radeon 840M).

Feature	GeForce GTX 680MX	Radeon 840M
G3D Mark Score	3,799	3,803
Architecture	Kepler	RDNA 3+
Process Node	28 nm	4 nm
Shading Units	1536+500%	256

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Advanced Features (DLSS/FSR)

The GeForce GTX 680MX gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon 840M leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GTX 680MX	Radeon 840M
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

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Video Memory (VRAM)

The GeForce GTX 680MX has 4 GB of VRAM, while the Radeon 840M carries 2 GB. GeForce GTX 680MX gives you 100% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 256-bit on the GeForce GTX 680MX and System on the Radeon 840M.

Feature	GeForce GTX 680MX	Radeon 840M
VRAM Capacity	4 GB+100%	2 GB
Memory Type	GDDR5	Shared
Memory Bandwidth	160 GB/s	System
Bus Width	256-bit	System

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Display & API Support

DirectX support: 12 (11_0) (GeForce GTX 680MX) vs 12 Ultimate (12_2) (Radeon 840M). Vulkan: 1.2 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 4 vs 4.

Feature	GeForce GTX 680MX	Radeon 840M
DirectX	12 (11_0)	12 Ultimate (12_2)
Vulkan	1.2	1.3+8%
OpenGL	4.6	4.6
Max Displays	4	4

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Media & Encoding

Hardware encoder: NVENC (Kepler) (GeForce GTX 680MX) vs VCN 4.0 (Radeon 840M). Decoder: NVDEC (Kepler) vs VCN 4.0. Supported codecs: H.264,MPEG-1,MPEG-2,VC-1 (GeForce GTX 680MX) vs H.264,H.265,AV1,VP9 (Radeon 840M).

Feature	GeForce GTX 680MX	Radeon 840M
Encoder	NVENC (Kepler)	VCN 4.0
Decoder	NVDEC (Kepler)	VCN 4.0
Codecs	H.264,MPEG-1,MPEG-2,VC-1	H.264,H.265,AV1,VP9

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Power & Dimensions

The GeForce GTX 680MX draws 122W versus the Radeon 840M's 30W — a 121.1% difference. The Radeon 840M is more power-efficient. Recommended PSU: 350W (GeForce GTX 680MX) vs 350W (Radeon 840M). Power connectors: 1x 6-pin vs PCIe-powered. Typical load temperature: 80 vs 90.