Radeon R9 390 X2 and GeForce 6800 XT - video card comparison
Radeon R9 390 X2
GeForce 6800 XT
Architecture
GCN 2.0 (2013−2017)
Curie (2003−2013)
GPU code name
Grenada
NV42
Market segment
Desktop
Desktop
Release date
September 2015
September 2005
Interface
PCIe 3.0 x16
AGP 8x
Supplementary power connectors
4x 8-pin
1x Molex
Core clock speed
1000 MHz
450 MHz
Floating-point performance
2x 5,120 gflops
-
Manufacturing process technology
28 nm
110 nm
Number of transistors
6,200 million
202 million
Pipelines / CUDA cores
2560
-
Power consumption (TDP)
580 Watt
-
Texture fill rate
160.0
5.400
Memory type
GDDR5
GDDR3
Maximum RAM amount
8 GB
256 MB
Memory bus width
512 Bit
256 Bit
Memory clock speed
5400 MHz
1200 MBps
Memory bandwidth
345.6 GB/s
38.4 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (12_0)
9.0c (9_3)
OpenCL
2.0
N/A
OpenGL
4.6
2.0 (full)
Shader Model6.33.0
Vulkan
1.2.131
N/A