GeForce GTX 645 vs RadeonT Vega 8

CPU

GPU

GeForce GTX 645

2010Core: 607 MHz

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RadeonT Vega 8

2021Core: 300 MHzBoost: 1900 MHz

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GeForce GTX 645 vs RadeonT Vega 8 Performance Spectrum

GeForce GTX 645

1 GB 200

1,880

0.0%

GeForce GTX 780 Rev. 2

1,894

+0.7%

Radeon R7 M465

Radeon HD 8570D + HD 6670 Dual

Radeon RX 9060 XT 16GB

About G3D Mark

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 RadeonT Vega 8 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 RadeonT Vega 8: 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

✅35.8% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 12.5 vs 0 G3D/$ ($150 MSRP vs Unknown MSRP).
✅100+% more VRAM for high-resolution textures and newer games (1 GB vs Unknown).

Trade-offs

❌2010 hardware with 1 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌344.4% higher power demand at 200W vs 45W.

RadeonT Vega 8

2021

Why buy it

✅GeForce GTX 645 is already obsolete for modern gaming, so RadeonT Vega 8 is the less risky modern option long term.
✅Draws 45W instead of 200W, a 155W reduction.
✅More future proof: GCN 5.1 (2018−2022) on 7nm with a newer platform for upcoming games.

Trade-offs

❌Lower average FPS than GeForce GTX 645 across 50 tracked games in our benchmark data.
❌Less VRAM, with Unknown vs 1 GB for high-resolution textures and newer games.
❌2021 hardware with Unknown 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 12.5 G3D/$ (Unknown MSRP vs $150 MSRP).

Quick Answers

Which GPU is faster for gaming right now?

GeForce GTX 645 is the faster gaming card right now. In our data, it leads by 35.8% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward RadeonT Vega 8 instead at 1,894 vs 1,880, so for this question the real-game FPS result matters more than the synthetic split.

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

RadeonT Vega 8 is the safer long-term pick for 2026 and beyond. The case is simple: the newer upscaling stack, FSR Upscaling / FSR 4 (2025) instead of no meaningful modern upscaling stack, a 7nm process instead of 40nm, and a newer 2021 generation instead of 2010. That makes it the less risky pick as game demands keep moving.

Which GPU is the better buy today?

GeForce GTX 645 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, GeForce GTX 645 is the easier value choice. If you care more about 1080p headroom, RadeonT Vega 8 has the stronger long-term case.

GeForce GTX 645 vs RadeonT Vega 8 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.

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)

The GeForce GTX 645 gets NVIDIA DLSS, which still tends to look cleaner in motion. The RadeonT Vega 8 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

Feature	GeForce GTX 645	RadeonT Vega 8
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

💾

Video Memory (VRAM)

The GeForce GTX 645 has 1 GB of VRAM, while the RadeonT Vega 8 carries 0 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 64-bit on the RadeonT Vega 8.

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

At launch, the GeForce GTX 645 came in at $150, while the RadeonT Vega 8 launched at $0. On MSRP, RadeonT Vega 8 was 100+% cheaper ($150 less). Performance per dollar on MSRP (G3D Mark / MSRP): 12.5 (GeForce GTX 645) vs Infinity (RadeonT Vega 8) — the RadeonT Vega 8 offers Infinity% better value. The newer card here is RadeonT Vega 8 (2021 vs 2010).

Feature	GeForce GTX 645	RadeonT Vega 8
MSRP	$150	$0-100%
Performance per Dollar	12.5	Infinity
Codename	GF100	Cezanne
Release	May 31 2010	April 13 2021
Ranking	#618	#601

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