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.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar

Based on actual market prices and performance benchmarks.

Performance Per Dollar

Based on actual market prices and performance benchmarks.

Performance Comparison

About G3D Mark

🏆 Chipversus Verdict

🚀 Performance Leadership

The Radeon HD 7700-serie is the superior choice for raw performance. It leads with a 1% higher G3D Mark score. However, the GeForce GTX 645 offers more VRAM, which may be beneficial for texture-heavy scenarios at higher resolutions.

Insight	GeForce GTX 645	Radeon HD 7700-serie
Performance	❌Lower raw frame rates (-1%)	✅Leading raw performance (+1%)
Longevity	🛑Obsolete Architecture (2010 / Fermi (2010−2014))	🛑Obsolete Architecture (2012 / GCN 1.0 (2012−2020))
Ecosystem	Supports FSR Upscaling	Supports FSR Upscaling
VRAM	✅ More VRAM (+100%)	❌ Less VRAM capacity
Efficiency	💡 Excellent Perf/Watt	⚡ Higher Power Consumption
Case Fit	📏 Compact / SFF Friendly	—

💎 Value Proposition

The GeForce GTX 645 offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the GeForce GTX 645 holds the technical lead. Priced at $20 (vs $35), it costs 43% less, resulting in a 73.2% higher cost efficiency score.

Insight	GeForce GTX 645	Radeon HD 7700-serie
Cost Efficiency	✅Better overall value (+73.2%)	❌Lower cost efficiency
Upfront Cost	✅More affordable ($20)	⚠️Higher upfront cost ($35)

Performance Check

Real-world benchmarks and performance projections based on comprehensive hardware analysis and comparative metrics. Values represent expected performance on High/Ultra settings at 1080p, 1440p, and 4K. Modeled using a Ryzen 7 7800X3D reference profile to minimize specific CPU bottlenecks.

Note: Performance behavior can vary per game. Specific architectures may perform better or worse depending on game engine optimizations and API implementation.

GeForce GTX 645 Benchmark Check

Radeon HD 7700-serie Benchmark Check

Technical Specifications

Side-by-side comparison of GeForce GTX 645 and Radeon HD 7700-serie

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)

Feature	GeForce GTX 645	Radeon HD 7700-serie
Upscaling Tech	FSR 2.1 (Compatible)	FSR 1.0 (Software)
Frame Generation	FSR 3 (Compatible)	Not Supported
Ray Reconstruction	No	No
Low Latency	Standard	AMD Anti-Lag

💾

Video Memory (VRAM)

The GeForce GTX 645 comes with 1 GB of VRAM, while the Radeon HD 7700-serie has 512 MB. The GeForce GTX 645 offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 128-bit. 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%

🔌

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

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Value Analysis

The GeForce GTX 645 launched at $150 MSRP and currently averages $20, while the Radeon HD 7700-serie launched at $159 and now averages $35. The GeForce GTX 645 costs 42.9% less ($15 savings) at current market prices. Performance per dollar (G3D Mark / price): 94.0 (GeForce GTX 645) vs 54.3 (Radeon HD 7700-serie) — the GeForce GTX 645 offers 73.1% better value. The Radeon HD 7700-serie is the newer GPU (2012 vs 2010).