GeForce GTX 660M
Iris Plus Graphics 645
GeForce GTX 660M vs Iris Plus Graphics 645 Performance Spectrum
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 660M vs Iris Plus Graphics 645 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.
Path of Exile 2
Counter-Strike 2
League of Legends
GeForce GTX 660M vs Iris Plus Graphics 645: 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 660M
2012Why buy it
- ✅100+% more VRAM for high-resolution textures and newer games (2 GB vs Unknown).
- ✅Iris Plus Graphics 645 is already obsolete for modern gaming, so GeForce GTX 660M is the less risky modern option long term.
Trade-offs
- ❌2012 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌233.3% higher power demand at 50W vs 15W.
Iris Plus Graphics 645
2019Why buy it
- ✅Draws 15W instead of 50W, a 35W reduction.
- ✅More future proof: Generation 9.5 (2016−2020) on 14nm with a newer platform for upcoming games.
Trade-offs
- ❌Less VRAM, with Unknown vs 2 GB for high-resolution textures and newer games.
- ❌2019 hardware with Unknown of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
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GeForce GTX 660M vs Iris Plus Graphics 645 Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
GeForce GTX 660M
The GeForce GTX 660M is manufactured by NVIDIA. It was released in March 22 2012. It features the Kepler architecture. The core clock ranges from 835 MHz to 950 MHz. It has 384 shading units. The thermal design power (TDP) is 50W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,452 points.
Iris Plus Graphics 645
The Iris Plus Graphics 645 is manufactured by Intel. It was released in October 7 2019. It features the Generation 9.5 architecture. The core clock ranges from 300 MHz to 1050 MHz. It has 384 shading units. The thermal design power (TDP) is 15W. Manufactured using 14 nm+++ process technology. G3D Mark benchmark score: 1,450 points.
Graphics Performance
The GeForce GTX 660M scores 1,452 and the Iris Plus Graphics 645 reaches 1,450 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GTX 660M is built on Kepler while the Iris Plus Graphics 645 uses Generation 9.5, both on 28 nm vs 14 nm+++. Shader units: 384 (GeForce GTX 660M) vs 384 (Iris Plus Graphics 645). Raw compute: 0.7296 TFLOPS (GeForce GTX 660M) vs 0.8064 TFLOPS (Iris Plus Graphics 645). Boost clocks: 950 MHz vs 1050 MHz.
| Feature | GeForce GTX 660M | Iris Plus Graphics 645 |
|---|---|---|
| G3D Mark Score | 1,452 | 1,450 |
| Architecture | Kepler | Generation 9.5 |
| Process Node | 28 nm | 14 nm+++ |
| Shading Units | 384 | 384 |
| Compute (TFLOPS) | 0.7296 TFLOPS | 0.8064 TFLOPS+11% |
| Boost Clock | 950 MHz | 1050 MHz+11% |
| ROPs | 16+167% | 6 |
| TMUs | 32 | 48+50% |
Advanced Features (DLSS/FSR)
The GeForce GTX 660M gets NVIDIA DLSS, which still tends to look cleaner in motion. The Iris Plus Graphics 645 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.
| Feature | GeForce GTX 660M | Iris Plus Graphics 645 |
|---|---|---|
| Upscaling Tech | Upscaling support | Upscaling support |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | NVIDIA Reflex | Standard |
Video Memory (VRAM)
The GeForce GTX 660M has 2 GB of VRAM, while the Iris Plus Graphics 645 carries 0 MB. GeForce GTX 660M 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 660M and System on the Iris Plus Graphics 645.
| Feature | GeForce GTX 660M | Iris Plus Graphics 645 |
|---|---|---|
| VRAM Capacity | 2 GB | Shared System RAM |
| Memory Type | GDDR5 | Shared |
| Memory Bandwidth | Unknown | System |
| Bus Width | 128-bit | System |
Power & Dimensions
The GeForce GTX 660M draws 50W versus the Iris Plus Graphics 645's 15W — a 107.7% difference. The Iris Plus Graphics 645 is more power-efficient. Recommended PSU: 350W (GeForce GTX 660M) vs 1W (Iris Plus Graphics 645). Power connectors: 1x 6-pin vs Integrated.
| Feature | GeForce GTX 660M | Iris Plus Graphics 645 |
|---|---|---|
| TDP | 50W | 15W-70% |
| Recommended PSU | 350W | 1W-100% |
| Power Connector | 1x 6-pin | Integrated |
| Slots | 0 | — |
| Temp (Load) | 60°C | — |
| Perf/Watt | 29.0 | 96.7+233% |
Value Analysis
The newer card here is Iris Plus Graphics 645 (2019 vs 2012).
| Feature | GeForce GTX 660M | Iris Plus Graphics 645 |
|---|---|---|
| MSRP | — | $0 |
| Codename | GK107 | Coffee Lake GT3e |
| Release | March 22 2012 | October 7 2019 |
| Ranking | #774 | #720 |
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