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 GT 645M vs GeForce RTX 4070 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 GT 645M vs GeForce RTX 4070: 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 GT 645M

2012

Why buy it

✅Draws 32W instead of 200W, a 168W reduction.

Trade-offs

❌Lower average FPS than GeForce RTX 4070 across 50 tracked games in our benchmark data.
❌Less VRAM, with 2 GB vs 12 GB for high-resolution textures and newer games.
❌No equivalent frame-generation stack like DLSS 3.5 + Frame Generation (2023).
❌2012 hardware with 2 GB 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 44.9 G3D/$ (Unknown MSRP vs $599 MSRP).

GeForce RTX 4070

2023

Why buy it

✅2055.2% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 44.9 vs 0 G3D/$ ($599 MSRP vs Unknown MSRP).
✅Access to a newer frame-generation stack with DLSS 3.5 + Frame Generation (2023).
✅500% more VRAM for high-resolution textures and newer games (12 GB vs 2 GB).
✅Better long-term bet: Ada Lovelace (2022−2024) on 5nm gives it a newer hardware base for upcoming games.

Trade-offs

❌525% higher power demand at 200W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce RTX 4070 is the faster gaming card right now. In our data, it leads by 2055.2% in average FPS across 50 tracked games in our benchmark data and by 2748.6% in PassMark G3D (26,919 vs 945), so the answer here is pretty clean.

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

GeForce RTX 4070 is the safer long-term pick for 2026 and beyond. The case is simple: 12 GB vs 2 GB of VRAM, the newer feature stack, with DLSS 3.5 Super Resolution (2023) and DLSS 3.5 + Frame Generation (2023), while GeForce GT 645M is limited to no meaningful modern upscaling stack and no comparable frame-generation support, a 5nm process instead of 28nm, and 46 vs 0 ray-tracing units. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

GeForce RTX 4070 makes the most sense today based on the pricing and value data we have for this matchup.

GeForce GT 645M vs GeForce RTX 4070 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

GeForce GT 645M

The GeForce GT 645M is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 945 points.

GeForce RTX 4070

The GeForce RTX 4070 is manufactured by NVIDIA. It was released in April 12 2023. It features the Ada Lovelace architecture. The core clock ranges from 1920 MHz to 2475 MHz. It has 5888 shading units. The thermal design power (TDP) is 200W. Manufactured using 5 nm process technology. It features 46 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 26,919 points. Launch price was $599.

⚡

Graphics Performance

In G3D Mark, the GeForce GT 645M scores 945 versus the GeForce RTX 4070's 26,919 — the GeForce RTX 4070 leads by 2748.6%. The GeForce GT 645M is built on Kepler while the GeForce RTX 4070 uses Ada Lovelace, both on 28 nm vs 5 nm. Shader units: 384 (GeForce GT 645M) vs 5,888 (GeForce RTX 4070). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 29.15 TFLOPS (GeForce RTX 4070).

Feature	GeForce GT 645M	GeForce RTX 4070
G3D Mark Score	945	26,919+2749%
Architecture	Kepler	Ada Lovelace
Process Node	28 nm	5 nm
Shading Units	384	5888+1433%
Compute (TFLOPS)	0.5445 TFLOPS	29.15 TFLOPS+5254%
ROPs	16	64+300%
TMUs	32	184+475%
L1 Cache	0.03 MB	5.8 MB+19233%
L2 Cache	0.25 MB	36 MB+14300%

✨

Advanced Features (DLSS/FSR)

The clearest feature edge for the GeForce RTX 4070 is support for DLSS 3.5 + Frame Generation. In games that support it, that can smooth out motion and lift perceived FPS. The GeForce GT 645M does not have comparable native support in the same tier.The GeForce RTX 4070 supports the newer DLSS 3.5 Super Resolution, whereas the GeForce GT 645M is capped at Upscaling support.

Feature	GeForce GT 645M	GeForce RTX 4070
Upscaling Tech	Upscaling support	DLSS 3.5 Super Resolution
Frame Generation	Not Supported	DLSS 3.5 + Frame Generation
Ray Reconstruction	No	Yes (DLSS 3.5)
Low Latency	NVIDIA Reflex	NVIDIA Reflex

💾

Video Memory (VRAM)

The GeForce GT 645M has 2 GB of VRAM, while the GeForce RTX 4070 carries 12 GB. GeForce RTX 4070 gives you 500% 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 GT 645M and 192-bit on the GeForce RTX 4070. L2 Cache: 0.25 MB (GeForce GT 645M) vs 36 MB (GeForce RTX 4070) — the GeForce RTX 4070 has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce GT 645M	GeForce RTX 4070
VRAM Capacity	2 GB	12 GB+500%
Memory Type	GDDR5	GDDR6X
Memory Bandwidth	Unknown	504 GB/s
Bus Width	128-bit	192-bit+50%
L2 Cache	0.25 MB	36 MB+14300%

🖥️

Display & API Support

DirectX support: 11.0 (GeForce GT 645M) vs 12.2 (GeForce RTX 4070). Vulkan: 1.1 vs 1.3. OpenGL: 4.5 vs 4.6. Maximum simultaneous displays: 1 vs 4.

Feature	GeForce GT 645M	GeForce RTX 4070
DirectX	11.0	12.2+11%
Vulkan	1.1	1.3+18%
OpenGL	4.5	4.6+2%
Max Displays	1	4+300%

🎬

Media & Encoding

Hardware encoder: NVENC 1.0 (GeForce GT 645M) vs 8th Gen NVENC (2x) (GeForce RTX 4070). Decoder: PureVideo HD VP5 vs 5th Gen NVDEC. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M) vs MPEG-2,H.264,HEVC,VP9,AV1 (GeForce RTX 4070).

Feature	GeForce GT 645M	GeForce RTX 4070
Encoder	NVENC 1.0	8th Gen NVENC (2x)
Decoder	PureVideo HD VP5	5th Gen NVDEC
Codecs	MPEG-2,H.264,VC-1,MPEG-4 ASP	MPEG-2,H.264,HEVC,VP9,AV1

🔌

Power & Dimensions

The GeForce GT 645M draws 32W versus the GeForce RTX 4070's 200W — a 144.8% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 650W (GeForce RTX 4070). Power connectors: PCIe-powered vs 8-pin. Card length: 0mm vs 304mm, occupying 0 vs 3 slots. Typical load temperature: 70°C vs 80°C.

Feature	GeForce GT 645M	GeForce RTX 4070
TDP	32W-84%	200W
Recommended PSU	350W-46%	650W
Power Connector	PCIe-powered	8-pin
Length	0mm	304mm
Height	0mm	137mm
Slots	0-100%	3
Temp (Load)	70°C-13%	80°C
Perf/Watt	29.5	134.6+356%

💰

Value Analysis

The newer card here is GeForce RTX 4070 (2023 vs 2012).

Feature	GeForce GT 645M	GeForce RTX 4070
MSRP	—	$599
Codename	GK107	AD104
Release	October 1 2012	April 12 2023
Ranking	#903	#32

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