GPU Comparison
RADEON
AMD Radeon HD 7950
CORE STATE
Tahiti
VRAM
3 GB
CLOCK SPEED
—
TDP
200 W
BUS WIDTH
384 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2012
VS
GEFORCE
GRID K2
CORE STATE
GK104
VRAM
4 GB
CLOCK SPEED
—
TDP
225 W
BUS WIDTH
256 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 7950
GRID K2
Core Specs
Shading Units
1,792
1,536
-14.3%
Shaders
1,792
1,536
-14.3%
TMUs
112
128
+14.3%
ROPs
32
32
0.0%
Compute Units
28
—
Clocks
GPU Clock
800 MHz
745 MHz
Memory Clock
1250 MHz
5 Gbps effective
1250 MHz
5 Gbps effective
Memory
Memory Size
3 GB
4 GB
VRAM (MB)
3,072
4,096
+33.3%
Memory Type
GDDR5
GDDR5
Memory Bus
384 bit
256 bit
Bandwidth
240.0 GB/s
160.0 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per SMX)
L2 Cache
768 KB
512 KB
Performance
Pixel Rate
25.60 GPixel/s
23.84 GPixel/s
Texture Rate
89.60 GTexel/s
95.36 GTexel/s
FP32 (TFLOPS)
2.867 TFLOPS
2.289 TFLOPS
FP64 (TFLOPS)
716.8 GFLOPS (1:4)
95.36 GFLOPS (1:24)
Power
TDP
200 W
225 W
TDP (W)
200
225
+12.5%
Suggested PSU
550 W
550 W
Power Connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Architecture
Architecture
GCN 1.0
Kepler
GPU Name
Tahiti
GK104
Generation
Southern Islands
(HD 7900)
GRID
(K2)
Process Size
28 nm
28 nm
Transistors
4,313 million
3,540 million
Die Size
352 mm²
294 mm²
Foundry
TSMC
TSMC
Density
12.3M / mm²
12.0M / mm²
API Support
DirectX
12 (11_1)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.175
OpenCL
2.1 (1.2)
3.0
CUDA
—
3.0
Shader Model
6.5 (5.1)
6.5 (5.1)
Physical
Slot Width
Dual-slot
Dual-slot
Length
278 mm
10.9 inches
267 mm
10.5 inches
Height
111 mm
4.4 inches
—
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Other
Launch Price
449 USD
5,199 USD
Production
End-of-life
End-of-life
Predecessor
Northern Islands
—
Successor
Sea Islands
—