AMD Radeon HD 6930 vs AMD Radeon HD 8770 OEM
GPU Specs Compare
Graphics Card
Release Date
Dec 2011
Sep 2013
Generation
Northern Islands
Sea Islands
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1200 MHz
1500 MHz
Memory
Memory Size
1024MB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
128bit
Bandwidth
153.6GB/s
96.00GB/s
Render Config
Compute Units
20
14
Shading Units
1280
896
TMUs
80
56
ROPs
32
16
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
256 KB
Theoretical Performance
Pixel Rate
24.00 GPixel/s
16.80 GPixel/s
Texture Rate
60.00 GTexel/s
58.80 GTexel/s
FP32 (float)
1.920 TFLOPS
1.882 TFLOPS
FP64 (double)
480.0 GFLOPS
117.6 GFLOPS
Graphics Processor
GPU Name
Cayman
Bonaire
GPU Variant
Cayman CE(215-0807105)
Bonaire XT(215-0839039)
Architecture
TeraScale 3
GCN 2.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
2.64 billion
2.08 billion
Die Size
389 mm²
160 mm²
Board Design
TDP
186W
85W
Suggested PSU
450 W
250 W
Outputs
2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 6-pin
1x 6-pin
Graphics Features
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
OpenCL
1.2
2.0
Vulkan
N/A
1.2
Shader Model
5.0
6.3