AMD Radeon HD 8770 OEM vs AMD Radeon HD 7950 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Sep 2013
Mar 2013
Generation
Sea Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1500 MHz
1250 MHz
Memory
Memory Size
1024MB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
128bit
384bit
Bandwidth
96.00GB/s
240.0GB/s
Render Config
Compute Units
14
28
Shading Units
896
1792
TMUs
56
112
ROPs
16
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
256 KB
768 KB
Theoretical Performance
Pixel Rate
16.80 GPixel/s
25.60 GPixel/s
Texture Rate
58.80 GTexel/s
89.60 GTexel/s
FP32 (float)
1.882 TFLOPS
2.867 TFLOPS
FP64 (double)
117.6 GFLOPS
716.8 GFLOPS
Graphics Processor
GPU Name
Bonaire
Tahiti
GPU Variant
Bonaire XT(215-0839039)
Tahiti PRO(215-0821056)
Architecture
GCN 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.08 billion
4.313 billion
Die Size
160 mm²
352 mm²
Board Design
TDP
85W
200W
Suggested PSU
250 W
550 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
1x 6-pin
2x 6-pin
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.0
1.2
Vulkan
1.2
1.2
Shader Model
6.3
5.1