Radeon HD 7770 and GeForce 8800 GTS 640 - video card comparison
Radeon HD 7770
GeForce 8800 GTS 640
Architecture
GCN (2011−2017)
Tesla (2006−2010)
GPU code name
Cape Verde
G80
Market segment
Desktop
Desktop
Release date
February 2012
November 2006
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin
Core clock speed
1000 MHz
513 MHz
Floating-point performance
-
228.1 gflops
Manufacturing process technology
28 nm
90 nm
Number of transistors
1,500 million
681 million
Pipelines / CUDA cores
640
96
Power consumption (TDP)
80 Watt
143 Watt
Texture fill rate
40.00
24.62
Memory type
GDDR5
GDDR3
Maximum RAM amount
2 GB
640 MB
Memory bus width
128 Bit
320 Bit
Memory clock speed
4500 MHz
1584 MHz
Memory bandwidth
72 GB/s
63.36 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
11.1 (10_0)
CUDA
-
+
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
1.2.131
N/A