GPU Comparison
RADEON
AMD Radeon HD 6950
CORE STATE
Cayman
VRAM
2 GB
CLOCK SPEED
—
TDP
200 W
BUS WIDTH
256 bit
ARCHITECTURE
TeraScale 3
PROCESS
40 nm
LAUNCH DATE
2010
VS
GEFORCE
Tesla K20Xm
CORE STATE
GK110
VRAM
6 GB
CLOCK SPEED
—
TDP
235 W
BUS WIDTH
384 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2012
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6950
Tesla K20Xm
Core Specs
Shading Units
1,408
2,688
+90.9%
Shaders
1,408
2,688
+90.9%
TMUs
88
224
+154.5%
ROPs
32
48
+50.0%
Compute Units
22
—
Clocks
GPU Clock
800 MHz
732 MHz
Memory Clock
1250 MHz
5 Gbps effective
1300 MHz
5.2 Gbps effective
Memory
Memory Size
2 GB
6 GB
VRAM (MB)
2,048
6,144
+200.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
384 bit
Bandwidth
160.0 GB/s
249.6 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
1536 KB
Performance
Pixel Rate
25.60 GPixel/s
40.99 GPixel/s
Texture Rate
70.40 GTexel/s
164.0 GTexel/s
FP32 (TFLOPS)
2.253 TFLOPS
3.935 TFLOPS
FP64 (TFLOPS)
563.2 GFLOPS (1:4)
1,311.7 GFLOPS (1:3)
Power
TDP
200 W
235 W
TDP (W)
200
235
+17.5%
Suggested PSU
550 W
550 W
Power Connectors
2x 6-pin
—
Architecture
Architecture
TeraScale 3
Kepler
GPU Name
Cayman
GK110
Generation
Northern Islands
(HD 6900)
Tesla Kepler
(Kxx)
Process Size
40 nm
28 nm
Transistors
2,640 million
7,080 million
Die Size
389 mm²
561 mm²
Foundry
TSMC
TSMC
Density
6.8M / mm²
12.6M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
Vulkan
—
1.2.175
OpenCL
1.2
3.0
CUDA
—
3.5
Shader Model
5.0
6.5 (5.1)
Physical
Slot Width
Dual-slot
Dual-slot
Length
286 mm
11.3 inches
267 mm
10.5 inches
Height
126 mm
5 inches
—
Outputs
2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Launch Price
299 USD
7,699 USD
Production
End-of-life
End-of-life
Predecessor
Evergreen
Tesla Fermi
Successor
Southern Islands
Tesla Maxwell