Radeon HD 6990 and Radeon HD 7770 - video card comparison
Passmark - benchmark score Radeon HD 6990 vs Radeon HD 7770
Radeon HD 6990
3103
Radeon HD 7770
2235
Radeon HD 6990
Radeon HD 7770
Architecture
TeraScale 3 (2010−2013)
GCN (2011−2017)
GPU code name
Antilles
Cape Verde
Market segment
Desktop
Desktop
Release date
March 2011
February 2012
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
1x 6-pin
Core clock speed
830 MHz
1000 MHz
Floating-point performance
2x 2,549.8 gflops
-
Manufacturing process technology
40 nm
28 nm
Number of transistors
2,640 million
1,500 million
Pipelines / CUDA cores
1536
640
Power consumption (TDP)
375 Watt
80 Watt
Texture fill rate
79.68
40.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5000 MHz
4500 MHz
Memory bandwidth
160.0 GB/s
72 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 4x mini-DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
+
HDMI
-
+
DirectX
11.2 (11_0)
12 (11_1)
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.2.131