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
RADEON
Radeon Pro 455
CORE STATE
Baffin
VRAM
2 GB
CLOCK SPEED
—
TDP
35 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2016
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 7950
Pro 455
Core Specs
Shading Units
1,792
768
-57.1%
Shaders
1,792
768
-57.1%
TMUs
112
48
-57.1%
ROPs
32
16
-50.0%
Compute Units
28
12
-57.1%
Clocks
GPU Clock
800 MHz
855 MHz
Memory Clock
1250 MHz
5 Gbps effective
1270 MHz
5.1 Gbps effective
Memory
Memory Size
3 GB
2 GB
VRAM (MB)
3,072
2,048
-33.3%
Memory Type
GDDR5
GDDR5
Memory Bus
384 bit
128 bit
Bandwidth
240.0 GB/s
81.28 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
1024 KB
Performance
Pixel Rate
25.60 GPixel/s
13.68 GPixel/s
Texture Rate
89.60 GTexel/s
41.04 GTexel/s
FP32 (TFLOPS)
2.867 TFLOPS
1,313.3 GFLOPS
FP64 (TFLOPS)
716.8 GFLOPS (1:4)
82.08 GFLOPS (1:16)
FP16 (TFLOPS)
—
1,313.3 GFLOPS (1:1)
Power
TDP
200 W
35 W
TDP (W)
200
35
-82.5%
Suggested PSU
550 W
—
Power Connectors
2x 6-pin
None
Architecture
Architecture
GCN 1.0
GCN 4.0
GPU Name
Tahiti
Baffin
Generation
Southern Islands
(HD 7900)
Radeon Pro Mac
(400 Series)
Process Size
28 nm
14 nm
Transistors
4,313 million
3,000 million
Die Size
352 mm²
123 mm²
Foundry
TSMC
GlobalFoundries
Density
12.3M / mm²
24.4M / mm²
API Support
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.3
OpenCL
2.1 (1.2)
2.1
Shader Model
6.5 (5.1)
6.7
Physical
Slot Width
Dual-slot
MXM Module
Length
278 mm
10.9 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 x8
Other
Launch Price
449 USD
—
Production
End-of-life
End-of-life
Predecessor
Northern Islands
—
Successor
Sea Islands
—