GeForce GT 645M vs Radeon R7 M270DX

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 645M vs Radeon R7 M270DX 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 645M vs Radeon R7 M270DX: 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 645M

2012

Why buy it

✅300% more VRAM for high-resolution textures and newer games (2 GB vs 512 MB).
✅Draws 32W instead of 75W, a 43W reduction.

Trade-offs

❌Lower average FPS than Radeon R7 M270DX 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.
❌Lower G3D Mark per dollar, at 0 vs 9.6 G3D/$ (Unknown MSRP vs $100 MSRP).

Radeon R7 M270DX

2014

Why buy it

✅10.1% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 9.6 vs 0 G3D/$ ($100 MSRP vs Unknown MSRP).

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.
❌134.4% higher power demand at 75W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon R7 M270DX is the faster gaming card right now. In our data, it leads by 10.1% in average FPS across 50 tracked games in our benchmark data and by 1.8% in PassMark G3D (962 vs 945), so the answer here is pretty clean.

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

GeForce GT 645M 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?

Radeon R7 M270DX 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, Radeon R7 M270DX is the easier value choice. If you care more about 1080p and some 1440p headroom, GeForce GT 645M has the stronger long-term case.

GeForce GT 645M vs Radeon R7 M270DX Technical Specifications

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

GeForce GT 645M

The GeForce GT 645M 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: 945 points.

Radeon R7 M270DX

The Radeon R7 M270DX is manufactured by AMD. It was released in June 11 2014. It features the GCN 3.0 architecture. The core clock ranges from 900 MHz to 940 MHz. It has 384 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 962 points.

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Graphics Performance

The GeForce GT 645M scores 945 and the Radeon R7 M270DX reaches 962 in the G3D Mark benchmark — just a 1.8% difference, making them near-identical in rasterization performance. The GeForce GT 645M is built on Kepler while the Radeon R7 M270DX uses GCN 3.0, both on a 28 nm process. Shader units: 384 (GeForce GT 645M) vs 384 (Radeon R7 M270DX). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 0.7219 TFLOPS (Radeon R7 M270DX).

Feature	GeForce GT 645M	Radeon R7 M270DX
G3D Mark Score	945	962+2%
Architecture	Kepler	GCN 3.0
Process Node	28 nm	28 nm
Shading Units	384	384
Compute (TFLOPS)	0.5445 TFLOPS	0.7219 TFLOPS+33%
ROPs	16+100%	8
TMUs	32+33%	24
L1 Cache	32 KB	96 KB+200%
L2 Cache	256 KB	256 KB

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Advanced Features (DLSS/FSR)

The GeForce GT 645M gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon R7 M270DX leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GT 645M	Radeon R7 M270DX
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 GT 645M has 2 GB of VRAM, while the Radeon R7 M270DX carries 512 MB. GeForce GT 645M 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 GT 645M and 128-bit on the Radeon R7 M270DX.

Feature	GeForce GT 645M	Radeon R7 M270DX
VRAM Capacity	2 GB+300%	0.5 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit	128-bit
L2 Cache	256 KB	256 KB

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Power & Dimensions

The GeForce GT 645M draws 32W versus the Radeon R7 M270DX's 75W — a 80.4% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 350W (Radeon R7 M270DX). Power connectors: PCIe-powered vs Mobile.

Feature	GeForce GT 645M	Radeon R7 M270DX
TDP	32W-57%	75W
Recommended PSU	350W	350W
Power Connector	PCIe-powered	Mobile
Length	0mm	—
Height	0mm	—
Slots	0	—
Temp (Load)	70°C	—
Perf/Watt	29.5+130%	12.8

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Value Analysis

The newer card here is Radeon R7 M270DX (2014 vs 2012).

Feature	GeForce GT 645M	Radeon R7 M270DX
MSRP	—	$100
Codename	GK107	Topaz
Release	October 1 2012	June 11 2014
Ranking	#903	#897

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