GeForce GT 640M
Iris Graphics 6100
GeForce GT 640M vs Iris Graphics 6100 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 GT 640M vs Iris Graphics 6100 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 GT 640M vs Iris Graphics 6100: 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 640M
2012Why buy it
- ✅100+% more VRAM for high-resolution textures and newer games (2 GB vs Unknown).
- ✅Iris Graphics 6100 is already obsolete for modern gaming, so GeForce GT 640M 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.
- ❌113.3% higher power demand at 32W vs 15W.
Iris Graphics 6100
2015Why buy it
- ✅Draws 15W instead of 32W, a 17W reduction.
- ✅More future proof: Generation 8.0 (2014−2015) 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.
- ❌2015 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 GT 640M vs Iris Graphics 6100 Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
GeForce GT 640M
The GeForce GT 640M is manufactured by NVIDIA. It was released in March 22 2012. It features the Kepler architecture. The core clock ranges from Up to 625 MHz to 645 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 907 points.
Iris Graphics 6100
The Iris Graphics 6100 is manufactured by Intel. It was released in January 5 2015. It features the Generation 8.0 architecture. The core clock ranges from 300 MHz to 1000 MHz. It has 384 shading units. The thermal design power (TDP) is 15W. Manufactured using 14 nm process technology. G3D Mark benchmark score: 899 points.
Graphics Performance
The GeForce GT 640M scores 907 and the Iris Graphics 6100 reaches 899 in the G3D Mark benchmark — just a 0.9% difference, making them near-identical in rasterization performance. The GeForce GT 640M is built on Kepler while the Iris Graphics 6100 uses Generation 8.0, both on 28 nm vs 14 nm. Shader units: 384 (GeForce GT 640M) vs 384 (Iris Graphics 6100). Raw compute: 0.48 TFLOPS (GeForce GT 640M) vs 0.768 TFLOPS (Iris Graphics 6100). Boost clocks: 645 MHz vs 1000 MHz.
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| G3D Mark Score | 907 | 899 |
| Architecture | Kepler | Generation 8.0 |
| Process Node | 28 nm | 14 nm |
| Shading Units | 384 | 384 |
| Compute (TFLOPS) | 0.48 TFLOPS | 0.768 TFLOPS+60% |
| Boost Clock | 645 MHz | 1000 MHz+55% |
| ROPs | 16+167% | 6 |
| TMUs | 32 | 48+50% |
Advanced Features (DLSS/FSR)
The GeForce GT 640M gets NVIDIA DLSS, which still tends to look cleaner in motion. The Iris Graphics 6100 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| 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 GT 640M has 2 GB of VRAM, while the Iris Graphics 6100 carries 0 MB. GeForce GT 640M 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 GT 640M and System on the Iris Graphics 6100.
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| VRAM Capacity | 2 GB | Shared System RAM |
| Memory Type | GDDR5 | Shared |
| Memory Bandwidth | Unknown | System |
| Bus Width | 128-bit | System |
Display & API Support
DirectX support: 11.0 (GeForce GT 640M) vs 12 (11_1) (Iris Graphics 6100). Vulkan: 1.1 vs 1.3. OpenGL: 4.5 vs 4.6. Maximum simultaneous displays: 1 vs 3.
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| DirectX | 11.0 | 12 (11_1)+9% |
| Vulkan | 1.1 | 1.3+18% |
| OpenGL | 4.5 | 4.6+2% |
| Max Displays | 1 | 3+200% |
Media & Encoding
Hardware encoder: NVENC 1.0 (GeForce GT 640M) vs QuickSync (Iris Graphics 6100). Decoder: PureVideo HD VP5 vs QuickSync. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 640M) vs H.264,H.265,VP8,VP9,VC-1 (Iris Graphics 6100).
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| Encoder | NVENC 1.0 | QuickSync |
| Decoder | PureVideo HD VP5 | QuickSync |
| Codecs | MPEG-2,H.264,VC-1,MPEG-4 ASP | H.264,H.265,VP8,VP9,VC-1 |
Power & Dimensions
The GeForce GT 640M draws 32W versus the Iris Graphics 6100's 15W — a 72.3% difference. The Iris Graphics 6100 is more power-efficient. Recommended PSU: 350W (GeForce GT 640M) vs 1W (Iris Graphics 6100). Power connectors: PCIe-powered vs Integrated. Card length: 0mm vs 0mm, occupying 0 vs 0 slots. Typical load temperature: 70°C vs 85.
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| TDP | 32W | 15W-53% |
| Recommended PSU | 350W | 1W-100% |
| Power Connector | PCIe-powered | Integrated |
| Length | 0mm | 0mm |
| Height | 0mm | 0mm |
| Slots | 0 | 0 |
| Temp (Load) | 70°C-18% | 85 |
| Perf/Watt | 28.3 | 59.9+112% |
Value Analysis
The newer card here is Iris Graphics 6100 (2015 vs 2012).
| Feature | GeForce GT 640M | Iris Graphics 6100 |
|---|---|---|
| MSRP | — | $0 |
| Codename | GK107 | Broadwell GT3 |
| Release | March 22 2012 | January 5 2015 |
| Ranking | #909 | #913 |
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