GeForce GT 635M vs GeForce GT 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.

GeForce GT 635M vs GeForce GT 820M 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 635M vs GeForce GT 820M: 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 635M

2012

Why buy it

✅200% more VRAM for high-resolution textures and newer games (2 GB vs 512 MB).
✅Draws 45W instead of 100W, a 55W reduction.

Trade-offs

❌Lower average FPS than GeForce GT 820M 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.

GeForce GT 820M

2014

Why buy it

✅82.1% more average FPS across 50 tracked games in our benchmark data.

Trade-offs

❌Less VRAM, with 512 MB vs 2 GB for high-resolution textures and newer games.
❌2014 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌122.2% higher power demand at 100W vs 45W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce GT 820M is the faster gaming card right now. In our data, it leads by 82.1% in average FPS across 50 tracked games in our benchmark data and by 0.4% in PassMark G3D (542 vs 540), so the answer here is pretty clean.

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

GeForce GT 635M is the safer long-term pick for 2026 and beyond. The case is simple: 2 GB vs 512 MB of VRAM. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

GeForce GT 820M 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, GeForce GT 820M is the easier value choice. If you care more about 1080p and some 1440p headroom, GeForce GT 635M has the stronger long-term case.

GeForce GT 635M vs GeForce GT 820M Technical Specifications

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

GeForce GT 635M

The GeForce GT 635M is manufactured by NVIDIA. It was released in March 22 2012. It features the Kepler architecture. The core clock ranges from Up to 900 MHz to 950 MHz. It has 384 shading units. The thermal design power (TDP) is 45W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 540 points.

GeForce GT 820M

The GeForce GT 820M is manufactured by NVIDIA. It was released in October 7 2014. It features the Maxwell 2.0 architecture. The core clock ranges from 1038 MHz to 1127 MHz. It has 1536 shading units. The thermal design power (TDP) is 100W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 542 points.

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Graphics Performance

The GeForce GT 635M scores 540 and the GeForce GT 820M reaches 542 in the G3D Mark benchmark — just a 0.4% difference, making them near-identical in rasterization performance. The GeForce GT 635M is built on Kepler while the GeForce GT 820M uses Maxwell 2.0, both on a 28 nm process. Shader units: 384 (GeForce GT 635M) vs 1,536 (GeForce GT 820M). Raw compute: 0.7296 TFLOPS (GeForce GT 635M) vs 1.659 TFLOPS (GeForce GT 820M). Boost clocks: 950 MHz vs 1127 MHz.

Feature	GeForce GT 635M	GeForce GT 820M
G3D Mark Score	540	542
Architecture	Kepler	Maxwell 2.0
Process Node	28 nm	28 nm
Shading Units	384	1536+300%
Compute (TFLOPS)	0.7296 TFLOPS	1.659 TFLOPS+127%
Boost Clock	950 MHz	1127 MHz+19%
ROPs	16	64+300%
TMUs	32	96+200%
L1 Cache	32 KB	576 KB+1700%
L2 Cache	0.25 MB	2 MB+700%

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Advanced Features (DLSS/FSR)

Feature	GeForce GT 635M	GeForce GT 820M
Upscaling Tech	Upscaling support	Upscaling support
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	NVIDIA Reflex

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Video Memory (VRAM)

The GeForce GT 635M has 2 GB of VRAM, while the GeForce GT 820M carries 512 MB. GeForce GT 635M gives you 200% 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 635M and 64-bit on the GeForce GT 820M. L2 Cache: 0.25 MB (GeForce GT 635M) vs 2 MB (GeForce GT 820M) — the GeForce GT 820M has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce GT 635M	GeForce GT 820M
VRAM Capacity	1.5 GB+200%	0.5 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit+100%	64-bit
L2 Cache	0.25 MB	2 MB+700%

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Display & API Support

DirectX support: 11.0 (GeForce GT 635M) vs 11.0 (GeForce GT 820M). OpenGL: 4.1 vs 4.0. Maximum simultaneous displays: 2 vs 1.

Feature	GeForce GT 635M	GeForce GT 820M
DirectX	11.0	11.0
OpenGL	4.1+2%	4.0
Max Displays	2+100%	1

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Media & Encoding

Hardware encoder: PureVideo HD (VP4) (GeForce GT 635M) vs No (GeForce GT 820M). Decoder: PureVideo HD (VP4) vs PureVideo HD VP4. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 635M) vs MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 820M).

Feature	GeForce GT 635M	GeForce GT 820M
Encoder	PureVideo HD (VP4)	No
Decoder	PureVideo HD (VP4)	PureVideo HD VP4
Codecs	H.264,MPEG-2,VC-1	MPEG-2,H.264,VC-1,MPEG-4 ASP

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Power & Dimensions

The GeForce GT 635M draws 45W versus the GeForce GT 820M's 100W — a 75.9% difference. The GeForce GT 635M is more power-efficient. Recommended PSU: 350W (GeForce GT 635M) vs 350W (GeForce GT 820M). Power connectors: PCIe-powered vs PCIe-powered. Typical load temperature: 80 vs 70°C.

Feature	GeForce GT 635M	GeForce GT 820M
TDP	45W-55%	100W
Recommended PSU	350W	350W
Power Connector	PCIe-powered	PCIe-powered
Length	—	0mm
Height	—	0mm
Slots	0	0
Temp (Load)	80	70°C-13%
Perf/Watt	12.0+122%	5.4