GeForce GTX 645 vs RadeonT Vega 8

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

⚠️ Generational Difference

The RadeonT Vega 8 is significantly newer (2021 vs 2010). The RadeonT Vega 8 likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The GeForce GTX 645 lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.

🚀 Performance Leadership

The RadeonT Vega 8 is the superior choice for raw performance. It leads with a 0.7% 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	RadeonT Vega 8
Performance	❌Lower raw frame rates (-0.7%)	✅Leading raw performance (+0.7%)
Longevity	🛑Obsolete Architecture (2010 / Fermi (2010−2014))	GCN 5.1 (2018−2022) (7nm)
Ecosystem	Supports FSR Upscaling	Supports FSR Upscaling
VRAM	✅ More VRAM (+100+%)	❌ Less VRAM capacity
Efficiency	⚡ Higher Power Consumption	💡 Excellent Perf/Watt
Case Fit	📏 Compact / SFF Friendly	—

💎 Value Proposition

While current pricing data is unavailable, the RadeonT Vega 8 remains the clear technical winner. Check real-time availability to determine if the performance gap justifies the market price.

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

RadeonT Vega 8 Benchmark Check

Technical Specifications

Side-by-side comparison of GeForce GTX 645 and RadeonT Vega 8

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.

RadeonT Vega 8

The RadeonT Vega 8 is manufactured by AMD. It was released in April 13 2021. It features the GCN 5.1 architecture. The core clock ranges from 300 MHz to 1900 MHz. It has 448 shading units. The thermal design power (TDP) is 45W. Manufactured using 7 nm process technology. G3D Mark benchmark score: 1,894 points.

⚡

Graphics Performance

The GeForce GTX 645 scores 1,880 and the RadeonT Vega 8 reaches 1,894 in the G3D Mark benchmark — just a 0.7% difference, making them near-identical in rasterization performance. The GeForce GTX 645 is built on Fermi while the RadeonT Vega 8 uses GCN 5.1, both on 40 nm vs 7 nm. Shader units: 352 (GeForce GTX 645) vs 448 (RadeonT Vega 8). Raw compute: 0.8554 TFLOPS (GeForce GTX 645) vs 1.702 TFLOPS (RadeonT Vega 8).

Feature	GeForce GTX 645	RadeonT Vega 8
G3D Mark Score	1,880	1,894
Architecture	Fermi	GCN 5.1
Process Node	40 nm	7 nm
Shading Units	352	448+27%
Compute (TFLOPS)	0.8554 TFLOPS	1.702 TFLOPS+99%
ROPs	32+300%	8
TMUs	44+57%	28

✨

Advanced Features (DLSS/FSR)

Feature	GeForce GTX 645	RadeonT Vega 8
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 RadeonT Vega 8 has 0 MB. The GeForce GTX 645 offers 100+% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 64-bit.

Feature	GeForce GTX 645	RadeonT Vega 8
VRAM Capacity	1 GB	Shared System RAM
Memory Type	GDDR5	GDDR5
Bus Width	128-bit+100%	64-bit

🖥️

Display & API Support

DirectX support: 11.0 (GeForce GTX 645) vs 12 (RadeonT Vega 8). Vulkan: 1.2 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 3.

Feature	GeForce GTX 645	RadeonT Vega 8
DirectX	11.0	12+9%
Vulkan	1.2	1.3+8%
OpenGL	4.6	4.6
Max Displays	3	3

🎬

Media & Encoding

Hardware encoder: NVENC (1st Gen) (GeForce GTX 645) vs VCN 1.0 (RadeonT Vega 8). Decoder: PureVideo VP5 vs VCN 1.0. Supported codecs: MPEG-2,VC-1,H.264,MPEG-4 (GeForce GTX 645) vs H.264,HEVC,VP9 (RadeonT Vega 8).

Feature	GeForce GTX 645	RadeonT Vega 8
Encoder	NVENC (1st Gen)	VCN 1.0
Decoder	PureVideo VP5	VCN 1.0
Codecs	MPEG-2,VC-1,H.264,MPEG-4	H.264,HEVC,VP9

🔌

Power & Dimensions

The GeForce GTX 645 draws 200W versus the RadeonT Vega 8's 45W — a 126.5% difference. The RadeonT Vega 8 is more power-efficient. Recommended PSU: 300W (GeForce GTX 645) vs 1W (RadeonT Vega 8). Power connectors: None vs Integrated. Typical load temperature: 80 vs 85°C.

Feature	GeForce GTX 645	RadeonT Vega 8
TDP	200W	45W-78%
Recommended PSU	300W	1W-100%
Power Connector	None	Integrated
Length	147mm	—
Height	111mm	—
Slots	1	—
Temp (Load)	80-6%	85°C
Perf/Watt	9.4	42.1+348%

💰

Value Analysis

The GeForce GTX 645 launched at $150 MSRP and currently averages $20, while the RadeonT Vega 8 launched at $0 and now averages $0. The RadeonT Vega 8 costs 100+% less ($20 savings) at current market prices. Performance per dollar (G3D Mark / price): 94.0 (GeForce GTX 645) vs Infinity (RadeonT Vega 8) — the RadeonT Vega 8 offers Infinity% better value. The RadeonT Vega 8 is the newer GPU (2021 vs 2010).