GeForce GTX 645 vs Radeon HD 7700-serie

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 645 vs Radeon HD 7700-serie 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 645 vs Radeon HD 7700-serie: 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 645

2010

Why buy it

✅Costs $9 less on MSRP ($150 MSRP vs $159 MSRP).
✅100% more VRAM for high-resolution textures and newer games (1 GB vs 512 MB).
✅Draws 200W instead of 250W, a 50W reduction.

Trade-offs

❌Lower average FPS than Radeon HD 7700-serie across 50 tracked games in our benchmark data.
❌2010 hardware with 1 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Radeon HD 7700-serie

2012

Why buy it

✅31.3% more average FPS across 50 tracked games in our benchmark data.
✅More future proof: GCN 1.0 (2012−2020) on 28nm with a newer platform for upcoming games.

Trade-offs

❌Less VRAM, with 512 MB vs 1 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.
❌
6% HIGHER MSRP
$159 MSRPvs$150 MSRP
❌25% higher power demand at 250W vs 200W.

Quick Answers

Which GPU is faster for gaming right now?

Radeon HD 7700-serie is the faster gaming card right now. In our data, it leads by 31.3% in average FPS across 50 tracked games in our benchmark data and by 1% in PassMark G3D (1,899 vs 1,880), so the answer here is pretty clean.

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

GeForce GTX 645 is the safer long-term pick for 2026 and beyond. The case is simple: 1 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?

GeForce GTX 645 makes the most sense to buy today. It is $9 cheaper on MSRP at $150 vs $159, and it leads G3D-per-dollar by 4.9% (12.5 vs 11.9), which is enough to swing the recommendation its way. Radeon HD 7700-serie still makes more sense if max raw gaming performance matters more than value.

GeForce GTX 645 vs Radeon HD 7700-serie Technical Specifications

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

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.

Radeon HD 7700-serie

The Radeon HD 7700-serie is manufactured by AMD. It was released in January 9 2012. It features the GCN 1.0 architecture. The boost clock speed is 925 MHz. It has 2048 shading units. The thermal design power (TDP) is 250W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,899 points. Launch price was $549.

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Graphics Performance

The GeForce GTX 645 scores 1,880 and the Radeon HD 7700-serie reaches 1,899 in the G3D Mark benchmark — just a 1% difference, making them near-identical in rasterization performance. The GeForce GTX 645 is built on Fermi while the Radeon HD 7700-serie uses GCN 1.0, both on 40 nm vs 28 nm. Shader units: 352 (GeForce GTX 645) vs 2,048 (Radeon HD 7700-serie). Raw compute: 0.8554 TFLOPS (GeForce GTX 645) vs 3.789 TFLOPS (Radeon HD 7700-serie).

Feature	GeForce GTX 645	Radeon HD 7700-serie
G3D Mark Score	1,880	1,899+1%
Architecture	Fermi	GCN 1.0
Process Node	40 nm	28 nm
Shading Units	352	2048+482%
Compute (TFLOPS)	0.8554 TFLOPS	3.789 TFLOPS+343%
ROPs	32	32
TMUs	44	128+191%
L1 Cache	704 KB+38%	512 KB
L2 Cache	512 KB	768 KB+50%

✨

Advanced Features (DLSS/FSR)

The GeForce GTX 645 gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon HD 7700-serie leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GTX 645	Radeon HD 7700-serie
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 GTX 645 has 1 GB of VRAM, while the Radeon HD 7700-serie carries 512 MB. GeForce GTX 645 gives you 100% 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 GTX 645 and 128-bit on the Radeon HD 7700-serie. L2 Cache: 512 KB (GeForce GTX 645) vs 768 KB (Radeon HD 7700-serie) — the Radeon HD 7700-serie has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce GTX 645	Radeon HD 7700-serie
VRAM Capacity	1 GB+100%	0.5 GB
Memory Type	GDDR5	GDDR5
Memory Bandwidth	Unknown	Unknown
Bus Width	128-bit	128-bit
L2 Cache	512 KB	768 KB+50%

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Power & Dimensions

The GeForce GTX 645 draws 200W versus the Radeon HD 7700-serie's 250W — a 22.2% difference. The GeForce GTX 645 is more power-efficient. Recommended PSU: 300W (GeForce GTX 645) vs 450W (Radeon HD 7700-serie). Power connectors: None vs 1x 6-pin.

Feature	GeForce GTX 645	Radeon HD 7700-serie
TDP	200W-20%	250W
Recommended PSU	300W-33%	450W
Power Connector	None	1x 6-pin
Length	147mm	—
Height	111mm	—
Slots	1	—
Temp (Load)	80	—
Perf/Watt	9.4+24%	7.6

💰

Value Analysis

At launch, the GeForce GTX 645 came in at $150, while the Radeon HD 7700-serie launched at $159. On MSRP, GeForce GTX 645 was 5.7% cheaper ($9 less). Performance per dollar on MSRP (G3D Mark / MSRP): 12.5 (GeForce GTX 645) vs 11.9 (Radeon HD 7700-serie) — the GeForce GTX 645 offers 5% better value. The newer card here is Radeon HD 7700-serie (2012 vs 2010).

Feature	GeForce GTX 645	Radeon HD 7700-serie
MSRP	$150-6%	$159
Performance per Dollar	12.5+5%	11.9
Codename	GF100	Tahiti
Release	May 31 2010	January 9 2012
Ranking	#618	#431

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