GeForce GT 645 vs GeForce GTX 765M

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 645 vs GeForce GTX 765M 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 645 vs GeForce GTX 765M: 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 645

2012

Why buy it

✅Delivers 100+% more G3D Mark for each dollar spent, at 20.3 vs 0 G3D/$ ($99 MSRP vs Unknown MSRP).
✅Draws 32W instead of 75W, a 43W reduction.

Trade-offs

❌Lower average FPS than GeForce GTX 765M 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 GTX 765M

2013

Why buy it

✅70.0% more average FPS across 50 tracked games in our benchmark data.
✅More future proof: Kepler (2012−2018) on 28nm with a newer platform for upcoming games.

Trade-offs

❌2013 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 20.3 G3D/$ (Unknown MSRP vs $99 MSRP).
❌134.4% higher power demand at 75W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce GTX 765M is the faster gaming card right now. In our data, it leads by 70.0% in average FPS across 50 tracked games in our benchmark data and by 0.4% in PassMark G3D (2,014 vs 2,006), so the answer here is pretty clean.

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

GeForce GT 645 is the safer long-term pick for 2026 and beyond because it comes out ahead on the available hardware-headroom signals for this matchup.

Which GPU is the better buy today?

GeForce GT 645 makes the most sense today based on the pricing and value data we have for this matchup. GeForce GTX 765M still makes more sense if max raw gaming performance matters more than value.

GeForce GT 645 vs GeForce GTX 765M Technical Specifications

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

GeForce GT 645

The GeForce GT 645 is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,006 points.

GeForce GTX 765M

The GeForce GTX 765M is manufactured by NVIDIA. It was released in May 30 2013. It features the Kepler architecture. The core clock ranges from 850 MHz to 863 MHz. It has 768 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,014 points.

⚡

Graphics Performance

The GeForce GT 645 scores 2,006 and the GeForce GTX 765M reaches 2,014 in the G3D Mark benchmark — just a 0.4% difference, making them near-identical in rasterization performance. The GeForce GT 645 is built on Kepler while the GeForce GTX 765M uses Kepler, both on a 28 nm process. Shader units: 384 (GeForce GT 645) vs 768 (GeForce GTX 765M). Raw compute: 0.5445 TFLOPS (GeForce GT 645) vs 1.326 TFLOPS (GeForce GTX 765M).

Feature	GeForce GT 645	GeForce GTX 765M
G3D Mark Score	2,006	2,014
Architecture	Kepler	Kepler
Process Node	28 nm	28 nm
Shading Units	384	768+100%
Compute (TFLOPS)	0.5445 TFLOPS	1.326 TFLOPS+144%
ROPs	16	16
TMUs	32	64+100%
L1 Cache	32 KB	64 KB+100%
L2 Cache	256 KB	256 KB

✨

Advanced Features (DLSS/FSR)

Feature	GeForce GT 645	GeForce GTX 765M
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)

Both cards ship with 2 GB of GDDR5. Memory bus width is 128-bit on the GeForce GT 645 and 128-bit on the GeForce GTX 765M.

Feature	GeForce GT 645	GeForce GTX 765M
VRAM Capacity	2 GB	2 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	80 GB/s
Bus Width	128-bit	128-bit
L2 Cache	256 KB	256 KB

🖥️

Display & API Support

DirectX support: 12 (11_0) (GeForce GT 645) vs 12 (11_0) (GeForce GTX 765M). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 4.

Feature	GeForce GT 645	GeForce GTX 765M
DirectX	12 (11_0)	12 (11_0)
Vulkan	1.2	1.2
OpenGL	4.6	4.6
Max Displays	3	4+33%

🎬

Media & Encoding

Hardware encoder: NVENC (1st Gen) (GeForce GT 645) vs 1st Gen NVENC (GeForce GTX 765M). Decoder: NVDEC (1st Gen) vs 1st Gen NVDEC (VP5). Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 645) vs H.264,VC-1,MPEG-2,MPEG-4 (GeForce GTX 765M).

Feature	GeForce GT 645	GeForce GTX 765M
Encoder	NVENC (1st Gen)	1st Gen NVENC
Decoder	NVDEC (1st Gen)	1st Gen NVDEC (VP5)
Codecs	H.264,MPEG-2,VC-1	H.264,VC-1,MPEG-2,MPEG-4

🔌

Power & Dimensions

The GeForce GT 645 draws 32W versus the GeForce GTX 765M's 75W — a 80.4% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (GeForce GT 645) vs 350W (GeForce GTX 765M). Power connectors: PCIe-powered vs 1x 6-pin. Typical load temperature: 80 vs 80°C.

Feature	GeForce GT 645	GeForce GTX 765M
TDP	32W-57%	75W
Recommended PSU	350W	350W
Power Connector	PCIe-powered	1x 6-pin
Length	145mm	—
Height	111mm	—
Slots	1	0-100%
Temp (Load)	80	80°C
Perf/Watt	62.7+133%	26.9

💰

Value Analysis

The newer card here is GeForce GTX 765M (2013 vs 2012).

Feature	GeForce GT 645	GeForce GTX 765M
MSRP	$99	—
Codename	GK107	GK106
Release	October 1 2012	May 30 2013
Ranking	#903	#680

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