GPU Comparison
RADEON
AMD Radeon HD 7970
CORE STATE
Tahiti
VRAM
3 GB
CLOCK SPEED
—
TDP
250 W
BUS WIDTH
384 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2012
VS
RADEON
Radeon R7 250
CORE STATE
Cape Verde
VRAM
1024 MB
CLOCK SPEED
—
TDP
55 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 7970
R7 250
Core Specs
Shading Units
2,048
512
-75.0%
Shaders
2,048
512
-75.0%
TMUs
128
32
-75.0%
ROPs
32
16
-50.0%
Compute Units
32
8
-75.0%
Clocks
GPU Clock
925 MHz
925 MHz
Memory Clock
1375 MHz
5.5 Gbps effective
900 MHz
1800 Mbps effective
Memory
Memory Size
3 GB
1024 MB
VRAM (MB)
3,072
1,024
-66.7%
Memory Type
GDDR5
DDR3
Memory Bus
384 bit
128 bit
Bandwidth
264.0 GB/s
28.80 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
256 KB
Performance
Pixel Rate
29.60 GPixel/s
14.80 GPixel/s
Texture Rate
118.4 GTexel/s
29.60 GTexel/s
FP32 (TFLOPS)
3.789 TFLOPS
947.2 GFLOPS
FP64 (TFLOPS)
947.2 GFLOPS (1:4)
59.20 GFLOPS (1:16)
Power
TDP
250 W
55 W
TDP (W)
250
55
-78.0%
Suggested PSU
600 W
250 W
Power Connectors
1x 6-pin + 1x 8-pin
None
Architecture
Architecture
GCN 1.0
GCN 1.0
GPU Name
Tahiti
Cape Verde
Generation
Southern Islands
(HD 7900)
Volcanic Islands
(R7 200)
Process Size
28 nm
28 nm
Transistors
4,313 million
1,500 million
Die Size
352 mm²
123 mm²
Foundry
TSMC
TSMC
Density
12.3M / mm²
12.2M / mm²
API Support
DirectX
12 (11_1)
12 (11_1)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.170
OpenCL
2.1 (1.2)
2.1 (1.2)
Shader Model
6.5 (5.1)
6.5 (5.1)
Physical
Slot Width
Dual-slot
Single-slot
Length
275 mm
10.8 inches
168 mm
6.6 inches
Height
111 mm
4.4 inches
—
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Other
Launch Price
549 USD
—
Production
End-of-life
End-of-life
Predecessor
Northern Islands
Sea Islands
Successor
Sea Islands
Pirate Islands