GPU Comparison
GEFORCE
NVIDIA Tesla K20m
CORE STATE
GK110
VRAM
5 GB
CLOCK SPEED
—
TDP
225 W
BUS WIDTH
320 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
VS
GEFORCE
Tesla K40c
CORE STATE
GK180
VRAM
12 GB
CLOCK SPEED
876 MHz
TDP
245 W
BUS WIDTH
384 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
Tesla K20m
Tesla K40c
Core Specs
Shading Units
2,496
2,880
+15.4%
Shaders
2,496
2,880
+15.4%
TMUs
208
240
+15.4%
ROPs
40
48
+20.0%
Clocks
Base Clock
—
745 MHz
Boost Clock
—
876 MHz
GPU Clock
706 MHz
—
Memory Clock
1300 MHz
5.2 Gbps effective
1502 MHz
6 Gbps effective
Memory
Memory Size
5 GB
12 GB
VRAM (MB)
5,120
12,288
+140.0%
Memory Type
GDDR5
GDDR5
Memory Bus
320 bit
384 bit
Bandwidth
208.0 GB/s
288.4 GB/s
Cache
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
1280 KB
1536 KB
Performance
Pixel Rate
36.71 GPixel/s
52.56 GPixel/s
Texture Rate
146.8 GTexel/s
210.2 GTexel/s
FP32 (TFLOPS)
3.524 TFLOPS
5.046 TFLOPS
FP64 (TFLOPS)
1,174.8 GFLOPS (1:3)
1.682 TFLOPS (1:3)
Power
TDP
225 W
245 W
TDP (W)
225
245
+8.9%
Suggested PSU
550 W
550 W
Power Connectors
1x 6-pin + 1x 8-pin
1x 6-pin + 1x 8-pin
Architecture
Architecture
Kepler
Kepler
GPU Name
GK110
GK180
Generation
Tesla Kepler
(Kxx)
Tesla Kepler
(Kxx)
Process Size
28 nm
28 nm
Transistors
7,080 million
7,080 million
Die Size
561 mm²
561 mm²
Foundry
TSMC
TSMC
Density
12.6M / mm²
12.6M / mm²
API Support
DirectX
12 (11_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.175
1.2.175
OpenCL
3.0
3.0
CUDA
3.5
3.5
Shader Model
6.5 (5.1)
5.1
Physical
Slot Width
Dual-slot
Dual-slot
Length
267 mm
10.5 inches
267 mm
10.5 inches
Outputs
No outputs
No outputs
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Launch Price
3,199 USD
7,699 USD
Production
End-of-life
End-of-life
Predecessor
Tesla Fermi
Tesla Fermi
Successor
Tesla Maxwell
Tesla Maxwell