GeForce GT 645M vs Radeon HD 6670/7670

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 HD 6670/7670 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 HD 6670/7670: 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 45W, a 13W reduction.
✅More future proof: Kepler (2012−2018) on 28nm with a newer platform for upcoming games.

Trade-offs

❌Lower average FPS than Radeon HD 6670/7670 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 $99 MSRP).

Radeon HD 6670/7670

2012

Why buy it

✅0.4% 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/$ ($99 MSRP vs Unknown MSRP).

Trade-offs

❌Less VRAM, with 512 MB vs 2 GB for high-resolution textures and newer games.
❌2012 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌40.6% higher power demand at 45W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon HD 6670/7670 is the faster gaming card right now. In our data, it leads by 0.4% in average FPS across 50 tracked games in our benchmark data and by 0.1% in PassMark G3D (946 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 and a 28nm process instead of 40nm. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

Radeon HD 6670/7670 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 HD 6670/7670 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 HD 6670/7670 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 HD 6670/7670

The Radeon HD 6670/7670 is manufactured by AMD. It was released in January 5 2012. It features the TeraScale 2 architecture. The core clock speed is 600 MHz. It has 480 shading units. The thermal design power (TDP) is 45W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 946 points.

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Graphics Performance

The GeForce GT 645M scores 945 and the Radeon HD 6670/7670 reaches 946 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GT 645M is built on Kepler while the Radeon HD 6670/7670 uses TeraScale 2, both on 28 nm vs 40 nm. Shader units: 384 (GeForce GT 645M) vs 480 (Radeon HD 6670/7670). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 0.576 TFLOPS (Radeon HD 6670/7670).

Feature	GeForce GT 645M	Radeon HD 6670/7670
G3D Mark Score	945	946
Architecture	Kepler	TeraScale 2
Process Node	28 nm	40 nm
Shading Units	384	480+25%
Compute (TFLOPS)	0.5445 TFLOPS	0.576 TFLOPS+6%
ROPs	16+100%	8
TMUs	32+33%	24
L1 Cache	32 KB	48 KB+50%
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 HD 6670/7670 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GT 645M	Radeon HD 6670/7670
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 HD 6670/7670 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 HD 6670/7670.

Feature	GeForce GT 645M	Radeon HD 6670/7670
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 HD 6670/7670's 45W — a 33.8% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 350W (Radeon HD 6670/7670). Power connectors: PCIe-powered vs 1x 6-pin.