Radeon HD 7990 and Radeon RX 6600 XT - video card comparison
Passmark - benchmark score Radeon HD 7990 vs Radeon RX 6600 XT
Radeon HD 7990
5732
Radeon RX 6600 XT
16985
Radeon HD 7990
Radeon RX 6600 XT
Architecture
GCN 1.0 (2012−2020)
Navi / RDNA2 (2020−2022)
GPU code name
Malta
Navi 23
Market segment
Desktop
Desktop
Release date
April 2013
July 2021
Interface
PCIe 3.0 x16
PCIe 4.0 x8
Supplementary power connectors
2x 8-pin
1x 8-pin
Boost clock speed
1000 MHz
2589 MHz
Core clock speed
950 MHz
1968 MHz
Floating-point performance
2x 4,096 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
4,313 million
11,060 million
Pipelines / CUDA cores
2048
2048
Power consumption (TDP)
375 Watt
160 (TGP) Watt
Texture fill rate
128.0
331.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
3 GB
8 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
6000 MHz
16000 MHz
Memory bandwidth
288.0 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 4x mini-DisplayPort
1x HDMI, 2x DisplayPort
HDMI
-
+
DirectX
12 (11_1)
12.0 Ultimate (12_2)
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
1.2.131
1.2