GeForce 940M vs GeForce GT 640 Rev. 2

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 940M vs GeForce GT 640 Rev. 2 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 940M vs GeForce GT 640 Rev. 2: 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 940M

2015

Why buy it

✅55.3% more average FPS across 50 tracked games in our benchmark data.
✅300% more VRAM for high-resolution textures and newer games (2 GB vs 512 MB).
✅Draws 33W instead of 49W, a 16W reduction.

Trade-offs

❌2015 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 11.8 G3D/$ (Unknown MSRP vs $99 MSRP).

GeForce GT 640 Rev. 2

2013

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 11.8 vs 0 G3D/$ ($99 MSRP vs Unknown MSRP).

Trade-offs

❌Lower average FPS than GeForce 940M across 50 tracked games in our benchmark data.
❌Less VRAM, with 512 MB vs 2 GB for high-resolution textures and newer games.
❌2013 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌48.5% higher power demand at 49W vs 33W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce 940M is the faster gaming card right now. In our data, it leads by 55.3% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward GeForce GT 640 Rev. 2 instead at 1,168 vs 1,133, 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?

GeForce 940M is the safer long-term pick for 2026 and beyond. The case is simple: 2 GB vs 512 MB of VRAM and a newer 2015 generation instead of 2013. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

GeForce GT 640 Rev. 2 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 640 Rev. 2 is the easier value choice. If you care more about 1080p and some 1440p headroom, GeForce 940M has the stronger long-term case.

GeForce 940M vs GeForce GT 640 Rev. 2 Technical Specifications

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

GeForce 940M

The GeForce 940M is manufactured by NVIDIA. It was released in March 13 2015. It features the Maxwell architecture. The core clock ranges from 1072 MHz to 1176 MHz. It has 384 shading units. The thermal design power (TDP) is 33W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,133 points.

GeForce GT 640 Rev. 2

The GeForce GT 640 Rev. 2 is manufactured by NVIDIA. It was released in May 29 2013. It features the Kepler 2.0 architecture. The core clock speed is 1046 MHz. It has 384 shading units. The thermal design power (TDP) is 49W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,168 points. Launch price was $89.

⚡

Graphics Performance

The GeForce 940M scores 1,133 and the GeForce GT 640 Rev. 2 reaches 1,168 in the G3D Mark benchmark — just a 3.1% difference, making them near-identical in rasterization performance. The GeForce 940M is built on Maxwell while the GeForce GT 640 Rev. 2 uses Kepler 2.0, both on a 28 nm process. Shader units: 384 (GeForce 940M) vs 384 (GeForce GT 640 Rev. 2). Raw compute: 0.9032 TFLOPS (GeForce 940M) vs 0.8033 TFLOPS (GeForce GT 640 Rev. 2).

Feature	GeForce 940M	GeForce GT 640 Rev. 2
G3D Mark Score	1,133	1,168+3%
Architecture	Maxwell	Kepler 2.0
Process Node	28 nm	28 nm
Shading Units	384	384
Compute (TFLOPS)	0.9032 TFLOPS+12%	0.8033 TFLOPS
ROPs	8	8
TMUs	24	32+33%
L1 Cache	192 KB+500%	32 KB
L2 Cache	1 MB+669%	0.13 MB

✨

Advanced Features (DLSS/FSR)

Feature	GeForce 940M	GeForce GT 640 Rev. 2
Upscaling Tech	Upscaling support	Upscaling support
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	NVIDIA Reflex

💾

Video Memory (VRAM)

The GeForce 940M has 2 GB of VRAM, while the GeForce GT 640 Rev. 2 carries 512 MB. GeForce 940M gives you 300% 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 940M and 64-bit on the GeForce GT 640 Rev. 2. L2 Cache: 1 MB (GeForce 940M) vs 0.13 MB (GeForce GT 640 Rev. 2) — the GeForce 940M has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce 940M	GeForce GT 640 Rev. 2
VRAM Capacity	2 GB+300%	0.5 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit+100%	64-bit
L2 Cache	1 MB+669%	0.13 MB

🖥️

Display & API Support

DirectX support: 12 (11_0) (GeForce 940M) vs 12 (11_0) (GeForce GT 640 Rev. 2). Vulkan: 1.1 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 4 vs 3.

Feature	GeForce 940M	GeForce GT 640 Rev. 2
DirectX	12 (11_0)	12 (11_0)
Vulkan	1.1	1.2+9%
OpenGL	4.6	4.6
Max Displays	4+33%	3

🎬

Media & Encoding

Hardware encoder: NVENC (Maxwell) (GeForce 940M) vs NVENC (Kepler) (GeForce GT 640 Rev. 2). Decoder: PureVideo HD (VP6) vs PureVideo HD 5. Supported codecs: H.264,H.265,VP9 (GeForce 940M) vs H.264,MPEG-2,VC-1 (GeForce GT 640 Rev. 2).

Feature	GeForce 940M	GeForce GT 640 Rev. 2
Encoder	NVENC (Maxwell)	NVENC (Kepler)
Decoder	PureVideo HD (VP6)	PureVideo HD 5
Codecs	H.264,H.265,VP9	H.264,MPEG-2,VC-1

🔌

Power & Dimensions

The GeForce 940M draws 33W versus the GeForce GT 640 Rev. 2's 49W — a 39% difference. The GeForce 940M is more power-efficient. Recommended PSU: 350W (GeForce 940M) vs 300W (GeForce GT 640 Rev. 2). Power connectors: Legacy vs None. Card length: 0mm vs 145mm, occupying 0 vs 1 slots. Typical load temperature: 75 vs 65.

Feature	GeForce 940M	GeForce GT 640 Rev. 2
TDP	33W-33%	49W
Recommended PSU	350W	300W-14%
Power Connector	Legacy	None
Length	0mm	145mm
Height	0mm	111mm
Slots	0-100%	1
Temp (Load)	75	65-13%
Perf/Watt	34.3+44%	23.8

💰

Value Analysis

The newer card here is GeForce 940M (2015 vs 2013).

Feature	GeForce 940M	GeForce GT 640 Rev. 2
MSRP	—	$99
Codename	GM108	GK208
Release	March 13 2015	May 29 2013
Ranking	#847	#786

Search GeForce 940M on Amazon

Search GeForce GT 640 Rev. 2 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.