AMD Radeon HD 8770 OEM vs AMD Radeon HD 6990M
GPU Specs Compare
Graphics Card
Release Date
Sep 2013
Jul 2011
Generation
Sea Islands
Vancouver
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
MXM-B (3.0)
Clock Speeds
Memory Clock
1500 MHz
900 MHz
Memory
Memory Size
1024MB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
128bit
256bit
Bandwidth
96.00GB/s
115.2GB/s
Render Config
Compute Units
14
14
Shading Units
896
1120
TMUs
56
56
ROPs
16
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
256 KB
512 KB
Theoretical Performance
Pixel Rate
16.80 GPixel/s
22.88 GPixel/s
Texture Rate
58.80 GTexel/s
40.04 GTexel/s
FP32 (float)
1.882 TFLOPS
1.602 TFLOPS
FP64 (double)
117.6 GFLOPS
-
Graphics Processor
GPU Name
Bonaire
Blackcomb
GPU Variant
Bonaire XT(215-0839039)
Blackcomb XTX(216-0811030)
Architecture
GCN 2.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
2.08 billion
1.7 billion
Die Size
160 mm²
212 mm²
Board Design
TDP
85W
100W
Suggested PSU
250 W
-
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin
None
Graphics Features
DirectX
12 (12_0)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
2.0
1.2
Vulkan
1.2
N/A
Shader Model
6.3
5.0