GeForce RTX 4090 and Radeon RX 640 OEM - video card comparison
GeForce RTX 4090
Radeon RX 640 OEM
Architecture
Ada Lovelace
GCN 4.0 (2016−2020)
GPU code name
AD102-300-A1
Polaris 23
Market segment
Desktop
Desktop
Release date
September 2022
April 2020
Interface
PCIe 4.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 16-pin
None
Boost clock speed
2520 MHz
-
Core clock speed
2235 MHz
1295 MHz
Manufacturing process technology
5 nm
14 nm
Number of transistors
76,300 million
2,200 million
Pipelines / CUDA cores
16384
640
Power consumption (TDP)
450 Watt
50 Watt
Texture fill rate
1,290
51.80
Memory type
GDDR6X
GDDR5
Maximum RAM amount
24 GB
4 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
21000 MHz
6 GB/s
Memory bandwidth
1,008 GB/s
96 GB/s
Shared memory
-
-
Display Connectors
1x HDMI 2.1, 3x DisplayPort 1.4a
1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a
HDMI
+
-
DirectX
12 Ultimate (12_2)
12 (12_0)
CUDA
8.9
-
OpenCL
3.0
2.1
OpenGL
4.6
4.6
Shader Model
6.6
6.7 (6.4)
Vulkan
1.3
1.3