Radeon HD 7700-serie vs GeForce GTX 645

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	Radeon HD 7700-serie	GeForce GTX 645
Performance	✅Leading raw performance (+1%)	❌Lower raw frame rates (-1%)
Longevity	🛑Obsolete Architecture (2012 / GCN 1.0 (2012−2020))	🛑Obsolete Architecture (2010 / Fermi (2010−2014))
Ecosystem	Supports FSR Upscaling	Supports FSR Upscaling
VRAM	❌ Less VRAM capacity	✅ More VRAM (+100%)
Efficiency	⚡ Higher Power Consumption	💡 Excellent Perf/Watt
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	Radeon HD 7700-serie	GeForce GTX 645
Cost Efficiency	❌Lower cost efficiency	✅Better overall value (+73.2%)
Upfront Cost	⚠️Higher upfront cost ($35)	✅More affordable ($20)

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.

Radeon HD 7700-serie Benchmark Check

GeForce GTX 645 Benchmark Check

Technical Specifications

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

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.

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.

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Graphics Performance

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

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

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Advanced Features (DLSS/FSR)

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

💾

Video Memory (VRAM)

The Radeon HD 7700-serie comes with 512 MB of VRAM, while the GeForce GTX 645 has 1 GB. 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: 768 KB (Radeon HD 7700-serie) vs 512 KB (GeForce GTX 645) — the Radeon HD 7700-serie has significantly larger on-die cache to reduce VRAM reliance.

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

🔌

Power & Dimensions

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

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

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Value Analysis

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