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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, raw graphics performance, VRAM, feature set, power efficiency, pricing context, and long-term value so you can see which GPU actually makes more sense.

GeForce GTX 645

2010

Why buy it

✅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

❌Very weak future-proofing: 2010-era hardware with 1 GB of VRAM is already obsolete for modern gaming and is hard to recommend today.
❌344.4% higher power demand at 200W vs 45W.

RadeonT Vega 8

2021

Why buy it

✅Less risky long-term buy than GeForce GTX 645: it remains the more sensible modern option while GeForce GTX 645 is already obsolete for modern gaming.
✅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

❌Less VRAM, with Unknown vs 1 GB for high-resolution textures and newer games.
❌Very weak future-proofing: 2021-era hardware with Unknown of VRAM is already obsolete for modern gaming and is hard to recommend today.
❌Lower G3D Mark per dollar, at 0 vs 12.5 G3D/$ (Unknown MSRP vs $150 MSRP).

GeForce GTX 645

2010

RadeonT Vega 8

2021

Why buy it

✅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).

Why buy it

✅Less risky long-term buy than GeForce GTX 645: it remains the more sensible modern option while GeForce GTX 645 is already obsolete for modern gaming.
✅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

❌Very weak future-proofing: 2010-era hardware with 1 GB of VRAM is already obsolete for modern gaming and is hard to recommend today.
❌344.4% higher power demand at 200W vs 45W.

Trade-offs

❌Less VRAM, with Unknown vs 1 GB for high-resolution textures and newer games.
❌Very weak future-proofing: 2021-era hardware with Unknown of VRAM is already obsolete for modern gaming and is hard to recommend today.
❌Lower G3D Mark per dollar, at 0 vs 12.5 G3D/$ (Unknown MSRP vs $150 MSRP).

Quick Answers

So, is RadeonT Vega 8 better than GeForce GTX 645?

Yes, but this is not really about a huge raw performance gap. The broader synthetic picture is also very close at 1,880 vs 1,894 in G3D Mark. The bigger reason to prefer RadeonT Vega 8 is the overall package: you are getting a newer generation, FSR upscaling, plus much lower power draw (45W vs 200W).

Which one is more future-proof for 2026 and beyond?

RadeonT Vega 8 is the more future-proof choice for 2026 and beyond. You are getting a newer 2021 generation instead of 2010, better upscaling support with FSR Upscaling / FSR 4 (2025) instead of no meaningful modern upscaling stack, and a 7nm process instead of 40nm. That broader feature stack should age better as more games lean on modern upscaling and frame-generation support.

Which one is the smarter buy today, not just the cheaper card?

RadeonT Vega 8 is the smarter buy by a wide margin. RadeonT Vega 8 is priced in an unclear MSRP range at an unclear MSRP versus $150 MSRP, and you are getting 0.7% higher G3D Mark. GeForce GTX 645 really only makes sense now as a very cheap stopgap or a used-market placeholder.

Is GeForce GTX 645 still worth buying for gaming in 2026?

No, not for a fresh gaming build. GeForce GTX 645 is 2010 hardware with 1 GB of VRAM, 1,880 in G3D Mark, and no meaningful modern upscaling stack. That is simply too far behind to be an easy modern recommendation.

Games Benchmarks

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 9800X3D 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

Path of Exile 2

Preset	GeForce GTX 645	RadeonT Vega 8
1080p
low	66 FPS	34 FPS
medium	54 FPS	25 FPS
high	38 FPS	16 FPS
ultra	26 FPS	9 FPS
1440p
low	52 FPS	25 FPS
medium	43 FPS	16 FPS
high	27 FPS	8 FPS
ultra	18 FPS	5 FPS
4K
low	20 FPS	10 FPS
medium	19 FPS	7 FPS
high	12 FPS	4 FPS
ultra	10 FPS	3 FPS

Open GeForce GTX 645 Open RadeonT Vega 8

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	GeForce GTX 645	RadeonT Vega 8
1080p
low	85 FPS	29 FPS
medium	62 FPS	13 FPS
high	50 FPS	9 FPS
ultra	38 FPS	6 FPS
1440p
low	49 FPS	9 FPS
medium	33 FPS	4 FPS
high	23 FPS	3 FPS
ultra	18 FPS	3 FPS
4K
low	23 FPS	3 FPS
medium	16 FPS	2 FPS
high	12 FPS	1 FPS
ultra	9 FPS	1 FPS

Open GeForce GTX 645 Open RadeonT Vega 8

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	GeForce GTX 645	RadeonT Vega 8
1080p
low	85 FPS	85 FPS
medium	68 FPS	68 FPS
high	56 FPS	57 FPS
ultra	42 FPS	43 FPS
1440p
low	63 FPS	64 FPS
medium	51 FPS	51 FPS
high	42 FPS	43 FPS
ultra	32 FPS	32 FPS
4K
low	42 FPS	43 FPS
medium	34 FPS	34 FPS
high	28 FPS	28 FPS
ultra	21 FPS	21 FPS

Open GeForce GTX 645 Open RadeonT Vega 8

League of Legends

League of Legends

Valorant

Preset	GeForce GTX 645	RadeonT Vega 8
1080p
low	85 FPS	85 FPS
medium	68 FPS	68 FPS
high	56 FPS	57 FPS
ultra	42 FPS	43 FPS
1440p
low	63 FPS	64 FPS
medium	51 FPS	51 FPS
high	42 FPS	43 FPS
ultra	32 FPS	32 FPS
4K
low	42 FPS	43 FPS
medium	34 FPS	34 FPS
high	28 FPS	28 FPS
ultra	21 FPS	21 FPS

Open GeForce GTX 645 Open RadeonT Vega 8

Valorant

Valorant

Check FPS for your specific build

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)

The GeForce GTX 645 gives access to NVIDIA DLSS (Deep Learning Super Sampling), widely regarding as the superior upscaling method for image quality. The RadeonT Vega 8 relies on FSR (FidelityFX Super Resolution), which is capable but generally slightly noisier than DLSS in motion.

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 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, while the RadeonT Vega 8 launched at $0. The RadeonT Vega 8 costs 100+% less ($150 savings) on MSRP. 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 RadeonT Vega 8 is the newer GPU (2021 vs 2010).