Tesla K40st vs GeForce GTX 275

Primary details

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

Place in the ranking	716	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.33	no data
Power efficiency	1.14	no data
Architecture	Tesla 2.0 (2007−2013)	Kepler (2012−2018)
GPU code name	GT200B	GK110B
Market segment	Desktop	Workstation
Release date	15 January 2009 (15 years ago)	22 November 2013 (11 years ago)
Launch price (MSRP)	$249	$7,699

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

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	240	2880
Core clock speed	633 MHz	575 MHz
Number of transistors	1,400 million	7,080 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	219 Watt	245 Watt
Maximum GPU temperature	105 °C	no data
Texture fill rate	50.64	138.0
Floating-point processing power	0.6739 TFLOPS	3.312 TFLOPS
ROPs	28	48
TMUs	80	240

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-E 2.0	no data
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Length	267 mm	267 mm
Height	4.376" (111 mm) (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	GDDR3	GDDR5
Maximum RAM amount	896 MB	12 GB
Memory bus width	448 Bit	384 Bit
Memory clock speed	1134 MHz	1502 MHz
Memory bandwidth	127.0 GB/s	288.4 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	Two Dual Link DVI	No outputs
Multi monitor support	+	no data
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	S/PDIF	no data

API compatibility

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

DirectX	11.1 (10_0)	12 (11_1)
Shader Model	4.0	5.1
OpenGL	3.0	4.6
OpenCL	1.1	1.2
Vulkan	N/A	1.1.126
CUDA	+	3.5

Pros & cons summary

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Recency	15 January 2009	22 November 2013
Maximum RAM amount	896 MB	12 GB
Chip lithography	55 nm	28 nm
Power consumption (TDP)	219 Watt	245 Watt

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