Radeon HD 6990M Crossfire and Radeon RX 6600 XT - video card comparison
Radeon HD 6990M Crossfire
Radeon RX 6600 XT
Architecture
Terascale 2 (2009−2015)
Navi / RDNA2 (2020−2022)
GPU code name
Blackcomb XTX
Navi 23
Market segment
Laptop
Desktop
Release date
July 2011
July 2021
Interface
-
PCIe 4.0 x8
Supplementary power connectors
-
1x 8-pin
Boost clock speed
-
2589 MHz
Core clock speed
715 MHz
1968 MHz
Manufacturing process technology
40 nm
7 nm
Number of transistors
2x1700 Million
11,060 million
Pipelines / CUDA cores
2240
2048
Power consumption (TDP)
-
160 (TGP) Watt
Texture fill rate
-
331.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
2x2 GB
8 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
900 MHz
16000 MHz
Memory bandwidth
-
256.0 GB/s
Shared memory
-
-
Display Connectors
-
1x HDMI, 2x DisplayPort
HDMI
-
+
DirectX
11
12.0 Ultimate (12_2)
OpenCL
-
2.1
OpenGL
-
4.6
Shader Model
-
6.5
Vulkan
-
1.2