GeForce GT 645M
Intel HD Graphics 620
GeForce GT 645M vs Intel HD Graphics 620 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 645M vs Intel HD Graphics 620 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 645M vs Intel HD Graphics 620: 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
2012Why buy it
- ✅100+% more VRAM for high-resolution textures and newer games (2 GB vs Unknown).
- ✅Intel HD Graphics 620 is already obsolete for modern gaming, so GeForce GT 645M 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.
Intel HD Graphics 620
2016Why buy it
- ✅Draws 15W instead of 32W, a 17W 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.
- ❌2016 hardware with Unknown of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
Quick Answers
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GeForce GT 645M vs Intel HD Graphics 620 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.
Intel HD Graphics 620
The Intel HD Graphics 620 is manufactured by Intel. It was released in August 30 2016. It features the Generation 9.5 architecture. The core clock ranges from 300 MHz to 1000 MHz. It has 192 shading units. The thermal design power (TDP) is 15W. Manufactured using 14 nm++ process technology. G3D Mark benchmark score: 919 points.
Graphics Performance
The GeForce GT 645M scores 945 and the Intel HD Graphics 620 reaches 919 in the G3D Mark benchmark — just a 2.8% difference, making them near-identical in rasterization performance. The GeForce GT 645M is built on Kepler while the Intel HD Graphics 620 uses Generation 9.5, both on 28 nm vs 14 nm++. Shader units: 384 (GeForce GT 645M) vs 192 (Intel HD Graphics 620). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 0.384 TFLOPS (Intel HD Graphics 620).
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| G3D Mark Score | 945+3% | 919 |
| Architecture | Kepler | Generation 9.5 |
| Process Node | 28 nm | 14 nm++ |
| Shading Units | 384+100% | 192 |
| Compute (TFLOPS) | 0.5445 TFLOPS+42% | 0.384 TFLOPS |
| ROPs | 16+433% | 3 |
| TMUs | 32+33% | 24 |
Advanced Features (DLSS/FSR)
The GeForce GT 645M gets NVIDIA DLSS, which still tends to look cleaner in motion. The Intel HD Graphics 620 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| 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 645M has 2 GB of VRAM, while the Intel HD Graphics 620 carries 0 MB. GeForce GT 645M 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 645M and System on the Intel HD Graphics 620.
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| 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 645M) vs 12 (12_1) (Intel HD Graphics 620). Vulkan: 1.1 vs 1.2. OpenGL: 4.5 vs 4.6. Maximum simultaneous displays: 1 vs 3.
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| DirectX | 11.0 | 12 (12_1)+9% |
| Vulkan | 1.1 | 1.2+9% |
| OpenGL | 4.5 | 4.6+2% |
| Max Displays | 1 | 3+200% |
Media & Encoding
Hardware encoder: NVENC 1.0 (GeForce GT 645M) vs Quick Sync Video (Intel HD Graphics 620). Decoder: PureVideo HD VP5 vs Quick Sync Video. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M) vs H.265/HEVC,H.264,VP9,MPEG-2,VC-1,JPEG (Intel HD Graphics 620).
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| Encoder | NVENC 1.0 | Quick Sync Video |
| Decoder | PureVideo HD VP5 | Quick Sync Video |
| Codecs | MPEG-2,H.264,VC-1,MPEG-4 ASP | H.265/HEVC,H.264,VP9,MPEG-2,VC-1,JPEG |
Power & Dimensions
The GeForce GT 645M draws 32W versus the Intel HD Graphics 620's 15W — a 72.3% difference. The Intel HD Graphics 620 is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 1W (Intel HD Graphics 620). Power connectors: PCIe-powered vs Integrated. Typical load temperature: 70°C vs 90°C.
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| TDP | 32W | 15W-53% |
| Recommended PSU | 350W | 1W-100% |
| Power Connector | PCIe-powered | Integrated |
| Length | 0mm | — |
| Height | 0mm | — |
| Slots | 0 | 0 |
| Temp (Load) | 70°C-22% | 90°C |
| Perf/Watt | 29.5 | 61.3+108% |
Value Analysis
The newer card here is Intel HD Graphics 620 (2016 vs 2012).
| Feature | GeForce GT 645M | Intel HD Graphics 620 |
|---|---|---|
| MSRP | — | $0 |
| Codename | GK107 | Kaby Lake GT2 |
| Release | October 1 2012 | August 30 2016 |
| Ranking | #903 | #906 |
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