Quadro K620M vs GeForce GT 640
Quadro K620M
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GeForce GT 640
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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 K620M is positioned at rank 101 and the GeForce GT 640 is on rank 107, so the Quadro K620M offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Quadro K620M
Performance Per Dollar GeForce GT 640
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce GT 640 is the superior choice for raw performance. It leads with a 0.9% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Quadro K620M.
| Insight | Quadro K620M | GeForce GT 640 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.9%) | ✅Leading raw performance (+0.9%) |
| Longevity | 🛑Obsolete Architecture (2015 / Maxwell (2014−2017)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | — | 📏 Compact / SFF Friendly |
💎 Value Proposition
While current pricing data is unavailable, the GeForce GT 640 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 K620M and GeForce GT 640
Quadro K620M
The Quadro K620M is manufactured by NVIDIA. It was released in March 1 2015. It features the Maxwell architecture. The core clock ranges from 1029 MHz to 1124 MHz. It has 384 shading units. The thermal design power (TDP) is 30W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,159 points.
GeForce GT 640
The GeForce GT 640 is manufactured by NVIDIA. It was released in June 5 2012. It features the Kepler architecture. The core clock speed is 902 MHz. It has 384 shading units. The thermal design power (TDP) is 65W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,169 points. Launch price was $99.
Graphics Performance
The Quadro K620M scores 1,159 and the GeForce GT 640 reaches 1,169 in the G3D Mark benchmark — just a 0.9% difference, making them near-identical in rasterization performance. The Quadro K620M is built on Maxwell while the GeForce GT 640 uses Kepler, both on a 28 nm process. Shader units: 384 (Quadro K620M) vs 384 (GeForce GT 640). Raw compute: 0.8632 TFLOPS (Quadro K620M) vs 0.6927 TFLOPS (GeForce GT 640).
| Feature | Quadro K620M | GeForce GT 640 |
|---|---|---|
| G3D Mark Score | 1,159 | 1,169 |
| Architecture | Maxwell | Kepler |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384 | 384 |
| Compute (TFLOPS) | 0.8632 TFLOPS+25% | 0.6927 TFLOPS |
| ROPs | 8 | 16+100% |
| TMUs | 16 | 32+100% |
| L1 Cache | 128 KB+300% | 32 KB |
| L2 Cache | 1 MB+300% | 0.25 MB |
Advanced Features (DLSS/FSR)
| Feature | Quadro K620M | GeForce GT 640 |
|---|---|---|
| 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)
Both cards feature 4 GB of GDDR5. Bus width: 64-bit vs 128-bit. L2 Cache: 1 MB (Quadro K620M) vs 0.25 MB (GeForce GT 640) — the Quadro K620M has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Quadro K620M | GeForce GT 640 |
|---|---|---|
| VRAM Capacity | 4 GB | 4 GB |
| Memory Type | GDDR5 | GDDR5 |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 1 MB+300% | 0.25 MB |
Power & Dimensions
The Quadro K620M draws 30W versus the GeForce GT 640's 65W — a 73.7% difference. The Quadro K620M is more power-efficient. Recommended PSU: 350W (Quadro K620M) vs 300W (GeForce GT 640). Power connectors: PCIe-powered vs None.
| Feature | Quadro K620M | GeForce GT 640 |
|---|---|---|
| TDP | 30W-54% | 65W |
| Recommended PSU | 350W | 300W-14% |
| Power Connector | PCIe-powered | None |
| Length | — | 145mm |
| Height | — | 111mm |
| Slots | — | 1 |
| Temp (Load) | — | 60°C |
| Perf/Watt | 38.6+114% | 18.0 |
Value Analysis
The Quadro K620M is the newer GPU (2015 vs 2012).
| Feature | Quadro K620M | GeForce GT 640 |
|---|---|---|
| MSRP | — | $99 |
| Avg Price (30d) | — | $50 |
| Codename | GM108 | GK107 |
| Release | March 1 2015 | June 5 2012 |
| Ranking | #842 | #837 |
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