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

✅Costs $349 less on MSRP ($150 MSRP vs $499 MSRP).
✅Measures 147mm instead of 242mm, a 95mm shorter card that is more SFF-friendly.

Trade-offs

❌Lower PassMark G3D performance (1,880 vs 22,172).
❌Less VRAM, with 1 GB vs 8 GB for high-resolution textures and newer games.
❌No DLSS support; it relies on Upscaling support instead.
❌Very weak future-proofing: 2010-era hardware with 1 GB of VRAM is already obsolete for modern gaming and is hard to recommend today.
❌Lower G3D Mark per dollar, at 12.5 vs 44.4 G3D/$ ($150 MSRP vs $499 MSRP).

GeForce RTX 3070

2020

Why buy it

✅+1079.4% higher PassMark G3D performance.
✅Delivers 254.5% more G3D Mark for each dollar spent, at 44.4 vs 12.5 G3D/$ ($499 MSRP vs $150 MSRP).
✅Access to DLSS 2 Super Resolution (2020).
✅700% more VRAM for high-resolution textures and newer games (8 GB vs 1 GB).
✅More future proof: Ampere (2020−2025) on 8nm with a newer platform for upcoming games.

Trade-offs

❌64.6% longer card at 242mm vs 147mm.

GeForce GTX 645

2010

GeForce RTX 3070

2020

Why buy it

✅Costs $349 less on MSRP ($150 MSRP vs $499 MSRP).
✅Measures 147mm instead of 242mm, a 95mm shorter card that is more SFF-friendly.

Why buy it

✅+1079.4% higher PassMark G3D performance.
✅Delivers 254.5% more G3D Mark for each dollar spent, at 44.4 vs 12.5 G3D/$ ($499 MSRP vs $150 MSRP).
✅Access to DLSS 2 Super Resolution (2020).
✅700% more VRAM for high-resolution textures and newer games (8 GB vs 1 GB).
✅More future proof: Ampere (2020−2025) on 8nm with a newer platform for upcoming games.

Trade-offs

❌Lower PassMark G3D performance (1,880 vs 22,172).
❌Less VRAM, with 1 GB vs 8 GB for high-resolution textures and newer games.
❌No DLSS support; it relies on Upscaling support instead.
❌Very weak future-proofing: 2010-era hardware with 1 GB of VRAM is already obsolete for modern gaming and is hard to recommend today.
❌Lower G3D Mark per dollar, at 12.5 vs 44.4 G3D/$ ($150 MSRP vs $499 MSRP).

Trade-offs

❌64.6% longer card at 242mm vs 147mm.

Quick Answers

So, is GeForce RTX 3070 better than GeForce GTX 645?

Yes. GeForce RTX 3070 is clearly the better overall GPU here. You are also looking at 22,172 vs 1,880 in G3D Mark. On top of that, GeForce RTX 3070 is a 2020 card with DLSS Super Resolution, while GeForce GTX 645 is a 2010 model from an older generation with no meaningful modern upscaling stack. So this is not really a tight same-tier comparison. It is more a modern card against an older, weaker alternative.

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

GeForce RTX 3070 is the more future-proof choice for 2026 and beyond. You are getting a newer 2020 generation instead of 2010, 1079.4% more raw performance headroom, more VRAM at 8 GB instead of 1 GB, and better upscaling support with DLSS 2 Super Resolution (2020) instead of no meaningful modern upscaling stack. That leaves it with more room for heavier textures, tougher ray tracing loads, and higher-end 1440p or 4K gaming over the next few years.

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

GeForce RTX 3070 is the smarter buy by a wide margin. GeForce RTX 3070 is about 232.7% more expensive on MSRP at $499 MSRP versus $150 MSRP, and you are getting 1079.4% 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

GeForce RTX 3070 Benchmark Check

Path of Exile 2

Preset	GeForce GTX 645	GeForce RTX 3070
1080p
low	82 FPS	158 FPS
medium	68 FPS	140 FPS
high	47 FPS	123 FPS
ultra	30 FPS	104 FPS
1440p
low	63 FPS	134 FPS
medium	51 FPS	109 FPS
high	33 FPS	96 FPS
ultra	21 FPS	86 FPS
4K
low	23 FPS	80 FPS
medium	22 FPS	67 FPS
high	13 FPS	52 FPS
ultra	11 FPS	45 FPS

Open GeForce GTX 645 Open GeForce RTX 3070

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	GeForce GTX 645	GeForce RTX 3070
1080p
low	85 FPS	470 FPS
medium	65 FPS	405 FPS
high	53 FPS	327 FPS
ultra	40 FPS	277 FPS
1440p
low	52 FPS	294 FPS
medium	34 FPS	246 FPS
high	24 FPS	213 FPS
ultra	19 FPS	179 FPS
4K
low	25 FPS	141 FPS
medium	16 FPS	120 FPS
high	12 FPS	105 FPS
ultra	9 FPS	83 FPS

Open GeForce GTX 645 Open GeForce RTX 3070

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	GeForce GTX 645	GeForce RTX 3070
1080p
low	85 FPS	885 FPS
medium	68 FPS	712 FPS
high	56 FPS	619 FPS
ultra	42 FPS	499 FPS
1440p
low	63 FPS	692 FPS
medium	51 FPS	557 FPS
high	42 FPS	473 FPS
ultra	32 FPS	374 FPS
4K
low	42 FPS	479 FPS
medium	34 FPS	388 FPS
high	28 FPS	330 FPS
ultra	21 FPS	249 FPS

Open GeForce GTX 645 Open GeForce RTX 3070

League of Legends

League of Legends

Valorant

Preset	GeForce GTX 645	GeForce RTX 3070
1080p
low	85 FPS	600 FPS
medium	68 FPS	527 FPS
high	56 FPS	433 FPS
ultra	42 FPS	385 FPS
1440p
low	63 FPS	489 FPS
medium	51 FPS	433 FPS
high	42 FPS	339 FPS
ultra	32 FPS	297 FPS
4K
low	42 FPS	292 FPS
medium	34 FPS	270 FPS
high	28 FPS	238 FPS
ultra	21 FPS	200 FPS

Open GeForce GTX 645 Open GeForce RTX 3070

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of GeForce GTX 645 and GeForce RTX 3070

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.

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 GTX 645 scores 1,880 versus the GeForce RTX 3070's 22,172 — the GeForce RTX 3070 leads by 1079.4%. The GeForce GTX 645 is built on Fermi while the GeForce RTX 3070 uses Ampere, both on 40 nm vs 8 nm. Shader units: 352 (GeForce GTX 645) vs 5,888 (GeForce RTX 3070). Raw compute: 0.8554 TFLOPS (GeForce GTX 645) vs 20.31 TFLOPS (GeForce RTX 3070).

Feature	GeForce GTX 645	GeForce RTX 3070
G3D Mark Score	1,880	22,172+1079%
Architecture	Fermi	Ampere
Process Node	40 nm	8 nm
Shading Units	352	5888+1573%
Compute (TFLOPS)	0.8554 TFLOPS	20.31 TFLOPS+2274%
ROPs	32	96+200%
TMUs	44	184+318%
L1 Cache	0.69 MB	5.8 MB+741%
L2 Cache	0.5 MB	4 MB+700%

✨

Advanced Features (DLSS/FSR)

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

Feature	GeForce GTX 645	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 GTX 645 comes with 1 GB of VRAM, while the GeForce RTX 3070 has 8 GB. The GeForce RTX 3070 offers 700% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 256-bit. L2 Cache: 0.5 MB (GeForce GTX 645) vs 4 MB (GeForce RTX 3070) — the GeForce RTX 3070 has significantly larger on-die cache to reduce VRAM reliance.

Feature	GeForce GTX 645	GeForce RTX 3070
VRAM Capacity	1 GB	8 GB+700%
Memory Type	GDDR5	GDDR6
Memory Bandwidth	Unknown	448 GB/s
Bus Width	128-bit	256-bit+100%
L2 Cache	0.5 MB	4 MB+700%

🖥️

Display & API Support

DirectX support: 11.0 (GeForce GTX 645) vs 12 Ultimate (GeForce RTX 3070). Vulkan: 1.2 vs 1.4. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 4.

Feature	GeForce GTX 645	GeForce RTX 3070
DirectX	11.0	12 Ultimate+9%
Vulkan	1.2	1.4+17%
OpenGL	4.6	4.6
Max Displays	3	4+33%

🎬

Media & Encoding

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

Feature	GeForce GTX 645	GeForce RTX 3070
Encoder	NVENC (1st Gen)	NVENC 7th gen
Decoder	PureVideo VP5	NVDEC 5th gen
Codecs	MPEG-2,VC-1,H.264,MPEG-4	H.264,H.265/HEVC,AV1,VP9

🔌

Power & Dimensions

The GeForce GTX 645 draws 200W versus the GeForce RTX 3070's 220W — a 9.5% difference. The GeForce GTX 645 is more power-efficient. Recommended PSU: 300W (GeForce GTX 645) vs 650W (GeForce RTX 3070). Power connectors: None vs 8-pin. Card length: 147mm vs 242mm, occupying 1 vs 2 slots. Typical load temperature: 80 vs 75°C.

Feature	GeForce GTX 645	GeForce RTX 3070
TDP	200W-9%	220W
Recommended PSU	300W-54%	650W
Power Connector	None	8-pin
Length	147mm	242mm
Height	111mm	112mm
Slots	1-50%	2
Temp (Load)	80	75°C-6%
Perf/Watt	9.4	100.8+972%

💰

Value Analysis

The GeForce GTX 645 launched at $150 MSRP, while the GeForce RTX 3070 launched at $499. The GeForce GTX 645 costs 69.9% less ($349 savings) on MSRP. Performance per dollar on MSRP (G3D Mark / MSRP): 12.5 (GeForce GTX 645) vs 44.4 (GeForce RTX 3070) — the GeForce RTX 3070 offers 255.2% better value. The GeForce RTX 3070 is the newer GPU (2020 vs 2010).