CPU
GPU
GeForce GTX 670MX
Popular choices:
GeForce GT 645
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 GTX 670MX is positioned at rank 111 and the GeForce GT 645 is on rank 242, 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 GTX 670MX
Performance Per Dollar GeForce GT 645
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 GTX 670MX | GeForce GT 645 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-1.4%) | ✅Leading raw performance (+1.4%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+50%) | ❌ Less VRAM capacity |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| 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.
Counter-Strike 2
League of Legends
Valorant
Technical Specifications
Side-by-side comparison of GeForce GTX 670MX and GeForce GT 645
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.
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.
Graphics Performance
The GeForce GTX 670MX scores 1,978 and the GeForce GT 645 reaches 2,006 in the G3D Mark benchmark — just a 1.4% difference, making them near-identical in rasterization performance. The GeForce GTX 670MX is built on Kepler while the GeForce GT 645 uses Kepler, both on a 28 nm process. Shader units: 960 (GeForce GTX 670MX) vs 384 (GeForce GT 645). Raw compute: 1.154 TFLOPS (GeForce GTX 670MX) vs 0.5445 TFLOPS (GeForce GT 645).
| Feature | GeForce GTX 670MX | GeForce GT 645 |
|---|---|---|
| G3D Mark Score | 1,978 | 2,006+1% |
| Architecture | Kepler | Kepler |
| Process Node | 28 nm | 28 nm |
| Shading Units | 960+150% | 384 |
| Compute (TFLOPS) | 1.154 TFLOPS+112% | 0.5445 TFLOPS |
| ROPs | 24+50% | 16 |
| TMUs | 80+150% | 32 |
| L1 Cache | 80 KB+150% | 32 KB |
| L2 Cache | 384 KB+50% | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | GeForce GTX 670MX | GeForce GT 645 |
|---|---|---|
| Upscaling Tech | FSR 2.1 (Compatible) | FSR 1.0 (Software) |
| Frame Generation | FSR 3 (Compatible) | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | Standard |
Video Memory (VRAM)
The GeForce GTX 670MX comes with 3 GB of VRAM, while the GeForce GT 645 has 2 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: 384 KB (GeForce GTX 670MX) vs 256 KB (GeForce GT 645) — the GeForce GTX 670MX has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce GTX 670MX | GeForce GT 645 |
|---|---|---|
| VRAM Capacity | 3 GB+50% | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 384 KB+50% | 256 KB |
Display & API Support
DirectX support: 12 (11_0) (GeForce GTX 670MX) vs 12 (11_0) (GeForce GT 645). Vulkan: 1.2 vs 1.2. OpenGL: 4.2 vs 4.6. Maximum simultaneous displays: 4 vs 3.
| Feature | GeForce GTX 670MX | GeForce GT 645 |
|---|---|---|
| DirectX | 12 (11_0) | 12 (11_0) |
| Vulkan | 1.2 | 1.2 |
| OpenGL | 4.2 | 4.6+10% |
| Max Displays | 4+33% | 3 |
Media & Encoding
Hardware encoder: NVENC 1st Gen (GeForce GTX 670MX) vs NVENC (1st Gen) (GeForce GT 645). Decoder: PureVideo HD VP5 vs NVDEC (1st Gen). Supported codecs: H.264,VC-1,MPEG-2,MPEG-4 ASP (GeForce GTX 670MX) vs H.264,MPEG-2,VC-1 (GeForce GT 645).
| Feature | GeForce GTX 670MX | GeForce GT 645 |
|---|---|---|
| Encoder | NVENC 1st Gen | NVENC (1st Gen) |
| Decoder | PureVideo HD VP5 | NVDEC (1st Gen) |
| Codecs | H.264,VC-1,MPEG-2,MPEG-4 ASP | H.264,MPEG-2,VC-1 |
Power & Dimensions
The GeForce GTX 670MX draws 75W versus the GeForce GT 645's 32W — a 80.4% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (GeForce GTX 670MX) vs 350W (GeForce GT 645). Power connectors: 1x 6-pin vs PCIe-powered. Typical load temperature: 85°C vs 80.
| Feature | GeForce GTX 670MX | GeForce GT 645 |
|---|---|---|
| TDP | 75W | 32W-57% |
| Recommended PSU | 350W | 350W |
| Power Connector | 1x 6-pin | PCIe-powered |
| Length | — | 145mm |
| Height | — | 111mm |
| Slots | 0-100% | 1 |
| Temp (Load) | 85°C | 80-6% |
| Perf/Watt | 26.4 | 62.7+138% |
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