
Quadro CX vs GeForce GT 645M

Quadro CX
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GeForce GT 645M
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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 Quadro CX is positioned at rank 383 and the GeForce GT 645M is on rank 80, so the GeForce GT 645M offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Quadro CX
Performance Per Dollar GeForce GT 645M
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Quadro CX is the superior choice for raw performance. It leads with a 0.2% higher G3D Mark score and 100% more VRAM (4 GB vs 2 GB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce GT 645M.
| Insight | Quadro CX | GeForce GT 645M |
|---|---|---|
| Performance | ✅Leading raw performance (+0.2%) | ❌Lower raw frame rates (-0.2%) |
| Longevity | 🛑Obsolete Architecture (2008 / Tesla 2.0 (2007−2013)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+100%) | ❌ Less VRAM capacity |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | Standard Size (267mm) | — |
💎 Value Proposition
While current pricing data is unavailable, the Quadro CX 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 Quadro CX and GeForce GT 645M

Quadro CX
The Quadro CX is manufactured by NVIDIA. It was released in November 11 2008. It features the Tesla 2.0 architecture. The core clock speed is 602 MHz. It has 192 shading units. The thermal design power (TDP) is 150W. Manufactured using 55 nm process technology. G3D Mark benchmark score: 947 points. Launch price was $1,999.

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.
Graphics Performance
The Quadro CX scores 947 and the GeForce GT 645M reaches 945 in the G3D Mark benchmark — just a 0.2% difference, making them near-identical in rasterization performance. The Quadro CX is built on Tesla 2.0 while the GeForce GT 645M uses Kepler, both on 55 nm vs 28 nm. Shader units: 192 (Quadro CX) vs 384 (GeForce GT 645M). Raw compute: 0.4623 TFLOPS (Quadro CX) vs 0.5445 TFLOPS (GeForce GT 645M).
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| G3D Mark Score | 947 | 945 |
| Architecture | Tesla 2.0 | Kepler |
| Process Node | 55 nm | 28 nm |
| Shading Units | 192 | 384+100% |
| Compute (TFLOPS) | 0.4623 TFLOPS | 0.5445 TFLOPS+18% |
| ROPs | 24+50% | 16 |
| TMUs | 64+100% | 32 |
| L2 Cache | 192 KB | 256 KB+33% |
Advanced Features (DLSS/FSR)
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | Standard |
Video Memory (VRAM)
The Quadro CX comes with 4 GB of VRAM, while the GeForce GT 645M has 2 GB. The Quadro CX offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 64-bit vs 128-bit. L2 Cache: 192 KB (Quadro CX) vs 256 KB (GeForce GT 645M) — the GeForce GT 645M has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| VRAM Capacity | 4 GB+100% | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 192 KB | 256 KB+33% |
Display & API Support
DirectX support: 11.1 (10_0) (Quadro CX) vs 11.0 (GeForce GT 645M). Vulkan: N/A vs 1.1. OpenGL: 3.3 vs 4.5. Maximum simultaneous displays: 2 vs 1.
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| DirectX | 11.1 (10_0) | 11.0 |
| Vulkan | N/A | 1.1 |
| OpenGL | 3.3 | 4.5+36% |
| Max Displays | 2+100% | 1 |
Media & Encoding
Hardware encoder: None (Quadro CX) vs NVENC 1.0 (GeForce GT 645M). Decoder: PureVideo HD vs PureVideo HD VP5. Supported codecs: H.264,MPEG-2,VC-1 (Quadro CX) vs MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M).
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| Encoder | None | NVENC 1.0 |
| Decoder | PureVideo HD | PureVideo HD VP5 |
| Codecs | H.264,MPEG-2,VC-1 | MPEG-2,H.264,VC-1,MPEG-4 ASP |
Power & Dimensions
The Quadro CX draws 150W versus the GeForce GT 645M's 32W — a 129.7% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (Quadro CX) vs 350W (GeForce GT 645M). Power connectors: PCIe-powered vs PCIe-powered. Card length: 267mm vs 0mm, occupying 2 vs 0 slots. Typical load temperature: 80 vs 70°C.
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| TDP | 150W | 32W-79% |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | PCIe-powered |
| Length | 267mm | 0mm |
| Height | 111mm | 0mm |
| Slots | 2 | 0-100% |
| Temp (Load) | 80 | 70°C-13% |
| Perf/Watt | 6.3 | 29.5+368% |
Value Analysis
The GeForce GT 645M is the newer GPU (2012 vs 2008).
| Feature | Quadro CX | GeForce GT 645M |
|---|---|---|
| MSRP | $1999 | — |
| Avg Price (30d) | $500 | — |
| Codename | GT200B | GK107 |
| Release | November 11 2008 | October 1 2012 |
| Ranking | #901 | #903 |
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