Tesla K40s vs GeForce GTX 680

Primary details

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

Place in the ranking	410	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.55	no data
Power efficiency	5.26	no data
Architecture	Kepler (2012−2018)	Kepler (2012−2018)
GPU code name	GK104	GK110B
Market segment	Desktop	Workstation
Release date	22 March 2012 (13 years ago)	22 November 2013 (11 years ago)
Launch price (MSRP)	$499	$7,699

Cost-effectiveness evaluation

The higher the ratio, the better. We use the manufacturer's recommended prices.

Performance to price scatter graph

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	1536	2880
Core clock speed	1006 MHz	745 MHz
Boost clock speed	1058 MHz	876 MHz
Number of transistors	3,540 million	7,080 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	195 Watt	245 Watt
Texture fill rate	135.4	210.2
Floating-point processing power	3.25 TFLOPS	5.046 TFLOPS
ROPs	32	48
TMUs	128	240
L1 Cache	128 KB	240 KB
L2 Cache	512 KB	1536 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).

Bus support	PCI Express 3.0	no data
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	254 mm	267 mm
Height	4.376" (11.1 cm)	no data
Width	2-slot	2-slot
Supplementary power connectors	2x 6-pin	no data
SLI options	+	-

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	2048 MB	12 GB
Memory bus width	256-bit GDDR5	384 Bit
Memory clock speed	1502 MHz	1502 MHz
Memory bandwidth	192.2 GB/s	288.4 GB/s
Shared memory	-	-

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	One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort	No outputs
Multi monitor support	4 displays	no data
HDMI	+	-
HDCP	+	-
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	Internal	no data

API and SDK support

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

DirectX	12 (11_0)	12 (11_1)
Shader Model	5.1	5.1
OpenGL	4.2	4.6
OpenCL	1.2	1.2
Vulkan	1.1.126	1.1.126
CUDA	+	3.5

Pros & cons summary

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Recency	22 March 2012	22 November 2013
Maximum RAM amount	2048 MB	12 GB
Power consumption (TDP)	195 Watt	245 Watt

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