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 3070 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 3070: 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 220W, a 188W reduction.

Trade-offs

❌Lower average FPS than GeForce RTX 3070 across 50 tracked games in our benchmark data.
❌Less VRAM, with 2 GB vs 8 GB for high-resolution textures and newer games.
❌No DLSS support; it relies on Upscaling support instead.
❌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 44.4 G3D/$ (Unknown MSRP vs $499 MSRP).

GeForce RTX 3070

2020

Why buy it

✅1954.0% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 44.4 vs 0 G3D/$ ($499 MSRP vs Unknown MSRP).
✅Access to DLSS 2 Super Resolution (2020).
✅300% more VRAM for high-resolution textures and newer games (8 GB vs 2 GB).
✅Better long-term bet: Ampere (2020−2025) on 8nm gives it a newer hardware base for upcoming games.

Trade-offs

❌587.5% higher power demand at 220W vs 32W.

Quick Answers

Which GPU is faster for gaming right now?

GeForce RTX 3070 is the faster gaming card right now. In our data, it leads by 1954.0% in average FPS across 50 tracked games in our benchmark data and by 2246.2% in PassMark G3D (22,172 vs 945), so the answer here is pretty clean.

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

GeForce RTX 3070 is the safer long-term pick for 2026 and beyond. The case is simple: 8 GB vs 2 GB of VRAM, the newer upscaling stack, DLSS 2 Super Resolution (2020) instead of no meaningful modern upscaling stack, a 8nm 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 3070 makes the most sense today based on the pricing and value data we have for this matchup.

GeForce GT 645M vs GeForce RTX 3070 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 3070

The GeForce RTX 3070 is manufactured by NVIDIA. It was released in September 1 2020. It features the Ampere architecture. The core clock ranges from 1500 MHz to 1725 MHz. It has 5888 shading units. The thermal design power (TDP) is 220W. Manufactured using 8 nm process technology. It features 46 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 22,172 points. Launch price was $499.

⚡

Graphics Performance

In G3D Mark, the GeForce GT 645M scores 945 versus the GeForce RTX 3070's 22,172 — the GeForce RTX 3070 leads by 2246.2%. The GeForce GT 645M is built on Kepler while the GeForce RTX 3070 uses Ampere, both on 28 nm vs 8 nm. Shader units: 384 (GeForce GT 645M) vs 5,888 (GeForce RTX 3070). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 20.31 TFLOPS (GeForce RTX 3070).

Feature	GeForce GT 645M	GeForce RTX 3070
G3D Mark Score	945	22,172+2246%
Architecture	Kepler	Ampere
Process Node	28 nm	8 nm
Shading Units	384	5888+1433%
Compute (TFLOPS)	0.5445 TFLOPS	20.31 TFLOPS+3630%
ROPs	16	96+500%
TMUs	32	184+475%
L1 Cache	0.03 MB	5.8 MB+19233%
L2 Cache	0.25 MB	4 MB+1500%

✨

Advanced Features (DLSS/FSR)

The GeForce RTX 3070 supports the newer DLSS 2 Super Resolution, whereas the GeForce GT 645M is capped at Upscaling support.

Feature	GeForce GT 645M	GeForce RTX 3070
Upscaling Tech	Upscaling support	DLSS 2 Super Resolution
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	NVIDIA Reflex	NVIDIA Reflex

💾

Video Memory (VRAM)

The GeForce GT 645M has 2 GB of VRAM, while the GeForce RTX 3070 carries 8 GB. GeForce RTX 3070 gives you 300% 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 256-bit on the GeForce RTX 3070. L2 Cache: 0.25 MB (GeForce GT 645M) vs 4 MB (GeForce RTX 3070) — the GeForce RTX 3070 has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce GT 645M	GeForce RTX 3070
VRAM Capacity	2 GB	8 GB+300%
Memory Type	GDDR5	GDDR6
Memory Bandwidth	Unknown	448 GB/s
Bus Width	128-bit	256-bit+100%
L2 Cache	0.25 MB	4 MB+1500%

🖥️

Display & API Support

DirectX support: 11.0 (GeForce GT 645M) vs 12 Ultimate (GeForce RTX 3070). Vulkan: 1.1 vs 1.4. OpenGL: 4.5 vs 4.6. Maximum simultaneous displays: 1 vs 4.

Feature	GeForce GT 645M	GeForce RTX 3070
DirectX	11.0	12 Ultimate+9%
Vulkan	1.1	1.4+27%
OpenGL	4.5	4.6+2%
Max Displays	1	4+300%

🎬

Media & Encoding

Hardware encoder: NVENC 1.0 (GeForce GT 645M) vs NVENC 7th gen (GeForce RTX 3070). Decoder: PureVideo HD VP5 vs NVDEC 5th gen. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M) vs H.264,H.265/HEVC,AV1,VP9 (GeForce RTX 3070).

Feature	GeForce GT 645M	GeForce RTX 3070
Encoder	NVENC 1.0	NVENC 7th gen
Decoder	PureVideo HD VP5	NVDEC 5th gen
Codecs	MPEG-2,H.264,VC-1,MPEG-4 ASP	H.264,H.265/HEVC,AV1,VP9

🔌

Power & Dimensions

The GeForce GT 645M draws 32W versus the GeForce RTX 3070's 220W — a 149.2% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 650W (GeForce RTX 3070). Power connectors: PCIe-powered vs 8-pin. Card length: 0mm vs 242mm, occupying 0 vs 2 slots. Typical load temperature: 70°C vs 75°C.

Feature	GeForce GT 645M	GeForce RTX 3070
TDP	32W-85%	220W
Recommended PSU	350W-46%	650W
Power Connector	PCIe-powered	8-pin
Length	0mm	242mm
Height	0mm	112mm
Slots	0-100%	2
Temp (Load)	70°C-7%	75°C
Perf/Watt	29.5	100.8+242%

💰

Value Analysis

The newer card here is GeForce RTX 3070 (2020 vs 2012).

Feature	GeForce GT 645M	GeForce RTX 3070
MSRP	—	$499
Codename	GK107	GA104
Release	October 1 2012	September 1 2020
Ranking	#903	#63

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