T400 vs Tesla K20c

Place in the ranking	490	472
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.37	no data
Power efficiency	2.73	21.48
Architecture	Kepler (2012−2018)	Turing (2018−2022)
GPU code name	GK110	TU117
Market segment	Workstation	Workstation
Release date	12 November 2012 (12 years ago)	6 May 2021 (3 years ago)
Launch price (MSRP)	$3,199	no data

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 cores	2496	384
Core clock speed	706 MHz	420 MHz
Boost clock speed	no data	1425 MHz
Number of transistors	7,080 million	4,700 million
Manufacturing process technology	28 nm	12 nm
Power consumption (TDP)	225 Watt	30 Watt
Texture fill rate	146.8	34.20
Floating-point processing power	3.524 TFLOPS	1.094 TFLOPS
ROPs	40	16
TMUs	208	24

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 3.0 x16
Length	267 mm	no data
Width	2-slot	1-slot
Supplementary power connectors	1x 6-pin + 1x 8-pin	None

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	GDDR6
Maximum RAM amount	5 GB	2 GB
Memory bus width	320 Bit	64 Bit
Memory clock speed	1300 MHz	1250 MHz
Memory bandwidth	208.0 GB/s	80 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 Connectors

No outputs

3x mini-DisplayPort

API compatibility

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

DirectX	12 (11_0)	12 (12_1)
Shader Model	5.1	6.6
OpenGL	4.6	4.6
OpenCL	1.2	3.0
Vulkan	1.1.126	1.2
CUDA	3.5	7.5

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	8.95	9.40
Recency	12 November 2012	6 May 2021
Maximum RAM amount	5 GB	2 GB
Chip lithography	28 nm	12 nm
Power consumption (TDP)	225 Watt	30 Watt

Tesla K20c has a 150% higher maximum VRAM amount.

T400, on the other hand, has a 5% higher aggregate performance score, an age advantage of 8 years, a 133.3% more advanced lithography process, and 650% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Tesla K20c and T400.

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