GeForce GTX 580M vs GeForce GTX 645

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 580M vs GeForce GTX 645 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 580M vs GeForce GTX 645: 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 580M

2011

Why buy it

✅17.1% more average FPS across 50 tracked games in our benchmark data.
✅100% more VRAM for high-resolution textures and newer games (2 GB vs 1 GB).
✅Draws 100W instead of 200W, a 100W reduction.

Trade-offs

❌2011 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 12.5 G3D/$ (Unknown MSRP vs $150 MSRP).

GeForce GTX 645

2010

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 12.5 vs 0 G3D/$ ($150 MSRP vs Unknown MSRP).

Trade-offs

❌Lower average FPS than GeForce GTX 580M across 50 tracked games in our benchmark data.
❌Less VRAM, with 1 GB vs 2 GB for high-resolution textures and newer games.
❌2010 hardware with 1 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌100% higher power demand at 200W vs 100W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce GTX 580M is the faster gaming card right now. In our data, it leads by 17.1% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward GeForce GTX 645 instead at 1,880 vs 1,878, 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 GTX 580M is the safer long-term pick for 2026 and beyond. The case is simple: 2 GB vs 1 GB of VRAM and a newer 2011 generation instead of 2010. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

GeForce GTX 645 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 GTX 645 is the easier value choice. If you care more about 1080p and some 1440p headroom, GeForce GTX 580M has the stronger long-term case.

GeForce GTX 580M vs GeForce GTX 645 Technical Specifications

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

GeForce GTX 580M

The GeForce GTX 580M is manufactured by NVIDIA. It was released in June 28 2011. It features the Fermi 2.0 architecture. The core clock speed is 620 MHz. It has 384 shading units. The thermal design power (TDP) is 100W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 1,878 points.

GeForce GTX 645

The GeForce GTX 645 is manufactured by NVIDIA. It was released in May 31 2010. It features the Fermi architecture. The core clock speed is 607 MHz. It has 352 shading units. The thermal design power (TDP) is 200W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 1,880 points. Launch price was $279.

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Graphics Performance

The GeForce GTX 580M scores 1,878 and the GeForce GTX 645 reaches 1,880 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GTX 580M is built on Fermi 2.0 while the GeForce GTX 645 uses Fermi, both on a 40 nm process. Shader units: 384 (GeForce GTX 580M) vs 352 (GeForce GTX 645). Raw compute: 0.9523 TFLOPS (GeForce GTX 580M) vs 0.8554 TFLOPS (GeForce GTX 645).

Feature	GeForce GTX 580M	GeForce GTX 645
G3D Mark Score	1,878	1,880
Architecture	Fermi 2.0	Fermi
Process Node	40 nm	40 nm
Shading Units	384+9%	352
Compute (TFLOPS)	0.9523 TFLOPS+11%	0.8554 TFLOPS
ROPs	32	32
TMUs	64+45%	44
L1 Cache	512 KB	704 KB+38%
L2 Cache	512 KB	512 KB

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Advanced Features (DLSS/FSR)

Feature	GeForce GTX 580M	GeForce GTX 645
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 GTX 580M has 2 GB of VRAM, while the GeForce GTX 645 carries 1 GB. GeForce GTX 580M 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 580M and 128-bit on the GeForce GTX 645.

Feature	GeForce GTX 580M	GeForce GTX 645
VRAM Capacity	2 GB+100%	1 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	96 GB/s	Unknown
Bus Width	256-bit+100%	128-bit
L2 Cache	512 KB	512 KB

🖥️

Display & API Support

DirectX support: 12 (11_0) (GeForce GTX 580M) vs 11.0 (GeForce GTX 645). Vulkan: 1.2 vs 1.2. OpenGL: 4.0 vs 4.6. Maximum simultaneous displays: 2 vs 3.

Feature	GeForce GTX 580M	GeForce GTX 645
DirectX	12 (11_0)+9%	11.0
Vulkan	1.2	1.2
OpenGL	4.0	4.6+15%
Max Displays	2	3+50%

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Media & Encoding

Hardware encoder: PureVideo HD VP4 (GeForce GTX 580M) vs NVENC (1st Gen) (GeForce GTX 645). Decoder: PureVideo HD VP4 vs PureVideo VP5. Supported codecs: H.264,VC-1,MPEG-2,MPEG-4 ASP (GeForce GTX 580M) vs MPEG-2,VC-1,H.264,MPEG-4 (GeForce GTX 645).

Feature	GeForce GTX 580M	GeForce GTX 645
Encoder	PureVideo HD VP4	NVENC (1st Gen)
Decoder	PureVideo HD VP4	PureVideo VP5
Codecs	H.264,VC-1,MPEG-2,MPEG-4 ASP	MPEG-2,VC-1,H.264,MPEG-4

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Power & Dimensions

The GeForce GTX 580M draws 100W versus the GeForce GTX 645's 200W — a 66.7% difference. The GeForce GTX 580M is more power-efficient. Recommended PSU: 350W (GeForce GTX 580M) vs 300W (GeForce GTX 645). Power connectors: 1x 6-pin vs None. Typical load temperature: 95°C vs 80.

Feature	GeForce GTX 580M	GeForce GTX 645
TDP	100W-50%	200W
Recommended PSU	350W	300W-14%
Power Connector	1x 6-pin	None
Length	—	147mm
Height	—	111mm
Slots	0-100%	1
Temp (Load)	95°C	80-16%
Perf/Watt	18.8+100%	9.4

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Value Analysis

The newer card here is GeForce GTX 580M (2011 vs 2010).

Feature	GeForce GTX 580M	GeForce GTX 645
MSRP	—	$150
Codename	GF114	GF100
Release	June 28 2011	May 31 2010
Ranking	#700	#618

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