CPU
GPU
GeForce GT 645
Popular choices:
GeForce GTX 670MX
Popular choices:
Performance Spectrum - GPU
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.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money. The GeForce GT 645 is positioned at rank 242 and the GeForce GTX 670MX is on rank 111, so the GeForce GTX 670MX offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar GeForce GT 645
Performance Per Dollar GeForce GTX 670MX
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce GT 645 is the superior choice for raw performance. It leads with a 1.4% higher G3D Mark score. However, the GeForce GTX 670MX offers more VRAM, which may be beneficial for texture-heavy scenarios at higher resolutions.
| Insight | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| Performance | ✅Leading raw performance (+1.4%) | ❌Lower raw frame rates (-1.4%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+50%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | 📏 Compact / SFF Friendly | — |
💎 Value Proposition
While current pricing data is unavailable, the GeForce GT 645 remains the clear technical winner. Check real-time availability to determine if the performance gap justifies the market price.
Performance Check
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 7800X3D 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.
Technical Specifications
Side-by-side comparison of GeForce GT 645 and GeForce GTX 670MX
GeForce GT 645
The GeForce GT 645 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: 2,006 points.
GeForce GTX 670MX
The GeForce GTX 670MX is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is 600 MHz. It has 960 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,978 points.
Graphics Performance
The GeForce GT 645 scores 2,006 and the GeForce GTX 670MX reaches 1,978 in the G3D Mark benchmark — just a 1.4% difference, making them near-identical in rasterization performance. The GeForce GT 645 is built on Kepler while the GeForce GTX 670MX uses Kepler, both on a 28 nm process. Shader units: 384 (GeForce GT 645) vs 960 (GeForce GTX 670MX). Raw compute: 0.5445 TFLOPS (GeForce GT 645) vs 1.154 TFLOPS (GeForce GTX 670MX).
| Feature | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| G3D Mark Score | 2,006+1% | 1,978 |
| Architecture | Kepler | Kepler |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384 | 960+150% |
| Compute (TFLOPS) | 0.5445 TFLOPS | 1.154 TFLOPS+112% |
| ROPs | 16 | 24+50% |
| TMUs | 32 | 80+150% |
| L1 Cache | 32 KB | 80 KB+150% |
| L2 Cache | 256 KB | 384 KB+50% |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 2.1 (Compatible) |
| Frame Generation | Not Supported | FSR 3 (Compatible) |
| Ray Reconstruction | No | No |
| Low Latency | Standard | Standard |
Video Memory (VRAM)
The GeForce GT 645 comes with 2 GB of VRAM, while the GeForce GTX 670MX has 3 GB. The GeForce GTX 670MX offers 50% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 128-bit. L2 Cache: 256 KB (GeForce GT 645) vs 384 KB (GeForce GTX 670MX) — the GeForce GTX 670MX has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| VRAM Capacity | 2 GB | 3 GB+50% |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 256 KB | 384 KB+50% |
Display & API Support
DirectX support: 12 (11_0) (GeForce GT 645) vs 12 (11_0) (GeForce GTX 670MX). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.2. Maximum simultaneous displays: 3 vs 4.
| Feature | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| DirectX | 12 (11_0) | 12 (11_0) |
| Vulkan | 1.2 | 1.2 |
| OpenGL | 4.6+10% | 4.2 |
| Max Displays | 3 | 4+33% |
Media & Encoding
Hardware encoder: NVENC (1st Gen) (GeForce GT 645) vs NVENC 1st Gen (GeForce GTX 670MX). Decoder: NVDEC (1st Gen) vs PureVideo HD VP5. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 645) vs H.264,VC-1,MPEG-2,MPEG-4 ASP (GeForce GTX 670MX).
| Feature | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| Encoder | NVENC (1st Gen) | NVENC 1st Gen |
| Decoder | NVDEC (1st Gen) | PureVideo HD VP5 |
| Codecs | H.264,MPEG-2,VC-1 | H.264,VC-1,MPEG-2,MPEG-4 ASP |
Power & Dimensions
The GeForce GT 645 draws 32W versus the GeForce GTX 670MX's 75W — a 80.4% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (GeForce GT 645) vs 350W (GeForce GTX 670MX). Power connectors: PCIe-powered vs 1x 6-pin. Typical load temperature: 80 vs 85°C.
| Feature | GeForce GT 645 | GeForce GTX 670MX |
|---|---|---|
| TDP | 32W-57% | 75W |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | 1x 6-pin |
| Length | 145mm | — |
| Height | 111mm | — |
| Slots | 1 | 0-100% |
| Temp (Load) | 80-6% | 85°C |
| Perf/Watt | 62.7+138% | 26.4 |
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