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 R9 M395X
CORE STATE
Amethyst
VRAM
8 GB
CLOCK SPEED
—
TDP
75 W
BUS WIDTH
256 bit
ARCHITECTURE
GCN 3.0
PROCESS
28 nm
LAUNCH DATE
2015
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
HD 7970
R9 M395X
Core Specs
Shading Units
2,048
2,048
0.0%
Shaders
2,048
2,048
0.0%
TMUs
128
128
0.0%
ROPs
32
32
0.0%
Compute Units
32
32
0.0%
Clocks
GPU Clock
925 MHz
723 MHz
Memory Clock
1375 MHz
5.5 Gbps effective
1250 MHz
5 Gbps effective
Memory
Memory Size
3 GB
8 GB
VRAM (MB)
3,072
8,192
+166.7%
Memory Type
GDDR5
GDDR5
Memory Bus
384 bit
256 bit
Bandwidth
264.0 GB/s
160.0 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
512 KB
Performance
Pixel Rate
29.60 GPixel/s
23.14 GPixel/s
Texture Rate
118.4 GTexel/s
92.54 GTexel/s
FP32 (TFLOPS)
3.789 TFLOPS
2.961 TFLOPS
FP64 (TFLOPS)
947.2 GFLOPS (1:4)
185.1 GFLOPS (1:16)
FP16 (TFLOPS)
—
2.961 TFLOPS (1:1)
Power
TDP
250 W
75 W
TDP (W)
250
75
-70.0%
Suggested PSU
600 W
—
Power Connectors
1x 6-pin + 1x 8-pin
None
Architecture
Architecture
GCN 1.0
GCN 3.0
GPU Name
Tahiti
Amethyst
Generation
Southern Islands
(HD 7900)
Gem System
(R9 M300)
Process Size
28 nm
28 nm
Transistors
4,313 million
5,000 million
Die Size
352 mm²
366 mm²
Foundry
TSMC
TSMC
Density
12.3M / mm²
13.7M / mm²
API Support
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.170
OpenCL
2.1 (1.2)
2.1
Shader Model
6.5 (5.1)
6.5
Physical
Slot Width
Dual-slot
MXM Module
Length
275 mm
10.8 inches
—
Height
111 mm
4.4 inches
—
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Portable Device Dependent
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
Solar System
Successor
Sea Islands
Polaris Mobile