Radeon Pro W6400 vs Tesla K20c

Place in the ranking	486	260
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.35	no data
Power efficiency	2.75	29.12
Architecture	Kepler (2012−2018)	RDNA 2.0 (2020−2024)
GPU code name	GK110	Navi 24
Market segment	Workstation	Workstation
Release date	12 November 2012 (12 years ago)	19 January 2022 (2 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	768
Core clock speed	706 MHz	2331 MHz
Boost clock speed	no data	2331 MHz
Number of transistors	7,080 million	5,400 million
Manufacturing process technology	28 nm	6 nm
Power consumption (TDP)	225 Watt	50 Watt
Texture fill rate	146.8	111.9
Floating-point processing power	3.524 TFLOPS	3.58 TFLOPS
ROPs	40	32
TMUs	208	48
Ray Tracing Cores	no data	12

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 4.0 x4
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	4 GB
Memory bus width	320 Bit	64 Bit
Memory clock speed	1300 MHz	1750 MHz
Memory bandwidth	208.0 GB/s	112.0 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 Connectors

No outputs

2x DisplayPort 1.4a

API compatibility

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

DirectX	12 (11_0)	12 Ultimate (12_2)
Shader Model	5.1	6.6
OpenGL	4.6	4.6
OpenCL	1.2	2.2
Vulkan	1.1.126	1.3
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	8.90	20.95
Recency	12 November 2012	19 January 2022
Maximum RAM amount	5 GB	4 GB
Chip lithography	28 nm	6 nm
Power consumption (TDP)	225 Watt	50 Watt

Tesla K20c has a 25% higher maximum VRAM amount.

Pro W6400, on the other hand, has a 135.4% higher aggregate performance score, an age advantage of 9 years, a 366.7% more advanced lithography process, and 350% lower power consumption.

The Radeon Pro W6400 is our recommended choice as it beats the Tesla K20c in performance tests.

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