Tesla K20c vs Tesla K8

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Aggregate performance score

We've compared Tesla K8 and Tesla K20c, covering specs and all relevant benchmarks.

Tesla K8
2014
8 GB GDDR5, 100 Watt
9.64
+8.3%

Tesla K8 outperforms Tesla K20c by a small 8% based on our aggregate benchmark results.

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking454483
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data0.35
Power efficiency6.962.85
ArchitectureKepler (2012−2018)Kepler (2012−2018)
GPU code nameGK104GK110
Market segmentWorkstationWorkstation
Release date16 September 2014 (10 years ago)12 November 2012 (11 years ago)
Launch price (MSRP)no data$3,199

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores15362496
Core clock speed693 MHz706 MHz
Boost clock speed811 MHzno data
Number of transistors3,540 million7,080 million
Manufacturing process technology28 nm28 nm
Power consumption (TDP)100 Watt225 Watt
Texture fill rate103.8146.8
Floating-point processing power2.491 TFLOPS3.524 TFLOPS
ROPs3240
TMUs128208

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).

InterfacePCIe 2.0 x16PCIe 2.0 x16
Length241 mm267 mm
Width1-slot2-slot
Supplementary power connectors1x 6-pin1x 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 typeGDDR5GDDR5
Maximum RAM amount8 GB5 GB
Memory bus width256 Bit320 Bit
Memory clock speed1250 MHz1300 MHz
Memory bandwidth160.0 GB/s208.0 GB/s

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display ConnectorsNo outputsNo outputs

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX12 (11_0)12 (11_0)
Shader Model5.15.1
OpenGL4.64.6
OpenCL1.21.2
Vulkan1.1.1261.1.126
CUDA3.03.5

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.


Combined synthetic benchmark score

This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Tesla K8 9.64
+8.3%
Tesla K20c 8.90

Octane Render OctaneBench

This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.

Tesla K8 38
Tesla K20c 60
+57.9%

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 9.64 8.90
Recency 16 September 2014 12 November 2012
Maximum RAM amount 8 GB 5 GB
Power consumption (TDP) 100 Watt 225 Watt

Tesla K8 has a 8.3% higher aggregate performance score, an age advantage of 1 year, a 60% higher maximum VRAM amount, and 125% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Tesla K8 and Tesla K20c.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

Vote for your favorite

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NVIDIA Tesla K8
Tesla K8
NVIDIA Tesla K20c
Tesla K20c

Comparisons with similar GPUs

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


1 3 votes

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4.7 12 votes

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Questions & comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.