NVIDIA Tesla K40 vs NVIDIA Tesla K8 Full Specs

Summary

2,880 Shaders 617MHz	3,072 Shaders 693MHz
12GB GDDR5288GB/s	16GB GDDR5320GB/s
Peak·FP32·FP16 3.55 TFLOPS	Peak·FP32·FP16 4.26 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 235W	TDP 100W
Power Connectors 1x 8-Pin 1x 6-Pin	Power Connectors - 1x 6-Pin

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

Tesla K403.55 TFLOPSFP32

x1

Tesla K84.26 TFLOPSFP32 (2x 2.13 TFLOPS)

x1.20

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Theoretical Performance

Clock Speed617MHz UC·Base·Boost·OC	Clock Speed693MHz UC·Boost·OC
Peak OPS 3.55 TFLOPSFP32	Peak OPS 4.26 TFLOPSFP32
FP32 3.55 TFLOPS	FP32 4.26 TFLOPS
FP64 1.19 TFLOPS	FP64 177.4 GFLOPS
Pixel Rate 29.6 GPixel/s	Pixel Rate 22.2 GPixel/s
Texture Rate 148.1 GTexel/s	Texture Rate 88.7 GTexel/s

Core Config

Shaders 2,880 Shaders	Shaders 3,072 Shaders
TMUs 240 TMUs	TMUs 256 TMUs
ROPs 48 ROPs	ROPs 64 ROPs
SMs 15 SMs	SMs 16 SMs

Clocks

Base Clock 575MHz	Base Clock -
Boost Clock 617MHz	Boost Clock 693MHz

Cache

L2 Cache 1.5MB shared

L2 Cache 512KB shared

Memory

12GB GDDR5	16GB GDDR5
Memory Bus 384-bit	Memory Bus 256-bit
Memory Speed 6GT/s	Memory Speed 5GT/s
Memory Bandwidth 288GB/s	Memory Bandwidth 320GB/s

Power & Thermals

TDP 235W

TDP 100W

Encoder

Encoder Model NVENC 1

Encoder Model NVENC 1

Decoder

Decoder Model NVDEC 1

Decoder Model NVDEC 1

Card

Form Factor PCIe Card	Form Factor PCIe Card
PCIe 2-Slots	PCIe 1-Slots
Height 111 mm (4.37") Width 267 mm (10.51") Depth 39 mm (1.53")	Height 111 mm (4.37") Width 241 mm (9.49") Depth 20 mm (0.79")
Cooling Passive -	Cooling Blower 1x Fan
Power Connectors 1x 8-Pin, 1x 6-Pin	Power Connectors 1x 6-Pin

Chip

Manufacturer NVIDIA	Manufacturer NVIDIA
Chip Designer NVIDIA	Chip Designer NVIDIA
Architecture Kepler	Architecture Kepler
Family Tesla K	Family Tesla K
Branding	Branding
Codename NVF0	Codename NVE4
Chip Variant -	Chip Variant GK104-200-KD-A2
Market Segment Server	Market Segment Server
Release Date Nov 22, 2013	Release Date May 1, 2012

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 28nm	Fabrication Node 28nm
Die Size 561mm²	Die Size 294mm²
Transistor Count 7.1 Billion	Transistor Count 3.5 Billion
Transistor Density 12.62 MTr/mm²	Transistor Density 12.04 MTr/mm²

Images

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