CPU
GPU
Tesla K20c
Popular choices:
Tesla K40c
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 Tesla K20c is positioned at rank 325 and the Tesla K40c is on rank 378, so the Tesla K20c offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Tesla K20c
Performance Per Dollar Tesla K40c
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Tesla K40c is the superior choice for raw performance. It leads with a 1.4% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Tesla K20c.
| Insight | Tesla K20c | Tesla K40c |
|---|---|---|
| Performance | ❌Lower raw frame rates (-1.4%) | ✅Leading raw performance (+1.4%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | 🛑Obsolete Architecture (2013 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | Normal Efficiency | Normal Efficiency |
| Case Fit | Standard Size (267mm) | Standard Size (267mm) |
💎 Value Proposition
The Tesla K40c offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the Tesla K40c holds the technical lead. Priced at $500 (vs $500), it costs 0% less, resulting in a 1.4% higher cost efficiency score.
| Insight | Tesla K20c | Tesla K40c |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+1.4%) |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 Tesla K20c and Tesla K40c
Tesla K20c
The Tesla K20c is manufactured by NVIDIA. It was released in November 12 2012. It features the Kepler architecture. The core clock speed is 706 MHz. It has 2496 shading units. The thermal design power (TDP) is 225W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 4,432 points. Launch price was $3,199.
Tesla K40c
The Tesla K40c is manufactured by NVIDIA. It was released in October 8 2013. It features the Kepler architecture. The core clock ranges from 745 MHz to 876 MHz. It has 2880 shading units. The thermal design power (TDP) is 245W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 4,495 points. Launch price was $7,699.
Graphics Performance
The Tesla K20c scores 4,432 and the Tesla K40c reaches 4,495 in the G3D Mark benchmark — just a 1.4% difference, making them near-identical in rasterization performance. The Tesla K20c is built on Kepler while the Tesla K40c uses Kepler, both on a 28 nm process. Shader units: 2,496 (Tesla K20c) vs 2,880 (Tesla K40c). Raw compute: 3.524 TFLOPS (Tesla K20c) vs 5.046 TFLOPS (Tesla K40c).
| Feature | Tesla K20c | Tesla K40c |
|---|---|---|
| G3D Mark Score | 4,432 | 4,495+1% |
| Architecture | Kepler | Kepler |
| Process Node | 28 nm | 28 nm |
| Shading Units | 2496 | 2880+15% |
| Compute (TFLOPS) | 3.524 TFLOPS | 5.046 TFLOPS+43% |
| ROPs | 40 | 48+20% |
| TMUs | 208 | 240+15% |
| L1 Cache | 208 KB | 240 KB+15% |
| L2 Cache | 1.25 MB | 1.5 MB+20% |
Advanced Features (DLSS/FSR)
| Feature | Tesla K20c | Tesla K40c |
|---|---|---|
| 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 2 GB of GDDR5. Bus width: 64-bit vs 64-bit. L2 Cache: 1.25 MB (Tesla K20c) vs 1.5 MB (Tesla K40c) — the Tesla K40c has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Tesla K20c | Tesla K40c |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Bus Width | 64-bit | 64-bit |
| L2 Cache | 1.25 MB | 1.5 MB+20% |
Display & API Support
DirectX support: 11_0 (Tesla K20c) vs 11_0 (Tesla K40c). Maximum simultaneous displays: 0 vs 0.
| Feature | Tesla K20c | Tesla K40c |
|---|---|---|
| DirectX | 11_0 | 11_0 |
| Max Displays | 0 | 0 |
Power & Dimensions
The Tesla K20c draws 225W versus the Tesla K40c's 245W — a 8.5% difference. The Tesla K20c is more power-efficient. Recommended PSU: 350W (Tesla K20c) vs 350W (Tesla K40c). Power connectors: PCIe-powered vs PCIe-powered. Card length: 267mm vs 267mm, occupying 2 vs 2 slots.
| Feature | Tesla K20c | Tesla K40c |
|---|---|---|
| TDP | 225W-8% | 245W |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | PCIe-powered |
| Length | 267mm | 267mm |
| Slots | 2 | 2 |
| Perf/Watt | 19.7+8% | 18.3 |
Value Analysis
The Tesla K20c launched at $3199 MSRP and currently averages $500, while the Tesla K40c launched at $7699 and now averages $500. Performance per dollar (G3D Mark / price): 8.9 (Tesla K20c) vs 9.0 (Tesla K40c) — the Tesla K40c offers 1.1% better value. The Tesla K40c is the newer GPU (2013 vs 2012).
| Feature | Tesla K20c | Tesla K40c |
|---|---|---|
| MSRP | $3199-58% | $7699 |
| Avg Price (30d) | $500 | $500 |
| Performance per Dollar | 8.9 | 9.0+1% |
| Codename | GK110 | GK180 |
| Release | November 12 2012 | October 8 2013 |
| Ranking | #549 | #465 |
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