Tesla K20c vs ATI Radeon HD 4870
Aggregate performance score
We've compared Radeon HD 4870 with Tesla K20c, including specs and performance data.
K20c outperforms HD 4870 by a whopping 149% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 800 | 565 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.28 | 0.16 |
| Power efficiency | 1.72 | 2.85 |
| Architecture | TeraScale (2005−2013) | Kepler (2012−2018) |
| GPU code name | RV770 | GK110 |
| Market segment | Desktop | Workstation |
| Release date | 25 June 2008 (18 years ago) | 12 November 2012 (13 years ago) |
| Launch price (MSRP) | $299 | $3,199 |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
ATI HD 4870 has 75% better value for money than Tesla K20c.
Performance to price scatter graph
Currently popular graphics cards are shown for comparison.
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Real power consumption of some graphics cards can well exceed their nominal TDP, especially if overclocked.
| Pipelines / CUDA cores | 800 | 2496 |
| Core clock speed | 750 MHz | 706 MHz |
| Number of transistors | 956 million | 7,080 million |
| Manufacturing process technology | 55 nm | 28 nm |
| Power consumption (TDP) | 150 Watt | 225 Watt |
| Texture fill rate | 30.00 | 146.8 |
| Floating-point processing power | 1.2 TFLOPS | 3.524 TFLOPS |
| ROPs | 16 | 40 |
| TMUs | 40 | 208 |
| L1 Cache | 160 KB | 208 KB |
| L2 Cache | 256 KB | 1280 KB |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Length | 241 mm | 267 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 2x 6-pin | 1x 6-pin + 1x 8-pin |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR5 | GDDR5 |
| Maximum RAM amount | 1 GB | 5 GB |
| Memory bus width | 256 Bit | 320 Bit |
| Memory clock speed | 900 MHz | 1300 MHz |
| Memory bandwidth | 115.2 GB/s | 208.0 GB/s |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 2x DVI, 1x S-Video | No outputs |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 10.1 (10_1) | 12 (11_0) |
| Shader Model | 4.1 | 5.1 |
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | - | 3.5 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 3.33 | 8.28 |
| Recency | 25 June 2008 | 12 November 2012 |
| Maximum RAM amount | 1 GB | 5 GB |
| Chip lithography | 55 nm | 28 nm |
| Power consumption (TDP) | 150 Watt | 225 Watt |
ATI HD 4870 has 50% lower power consumption.
Tesla K20c, on the other hand, has a 149% higher aggregate performance score, an age advantage of 4 years, a 400% higher maximum VRAM amount, and a 96% more advanced lithography process.
The Tesla K20c is our recommended choice as it beats the Radeon HD 4870 in performance tests.
Be aware that Radeon HD 4870 is a desktop graphics card while Tesla K20c is a workstation one.
Other comparisons
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