Radeon RX 6400 vs GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 8 years and 8 months late
Boost Clock2321MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (128.0GB/s vs 40.06GB/s)
384 additional rendering cores
GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 53W)
Score
Benchmark
FP32 (float)
Radeon RX 6400
+343%
3565
GeForce GT 640 Rev. 2
803
Graphics Card
Jan 2022
Release Date
May 2013
Navi II
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x4
Bus Interface
PCIe 2.0 x8
Clock Speeds
1923 MHz
Base Clock
-
2321 MHz
Boost Clock
-
2000 MHz
Memory Clock
1252 MHz
Memory
4GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
64bit
Memory Bus
64bit
128.0GB/s
Bandwidth
40.06GB/s
Render Config
12
Compute Units
-
768
Shading Units
384
48
TMUs
32
32
ROPs
8
12
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per SMX)
1024 KB
L2 Cache
512 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
8.368 GPixel/s
111.4 GTexel/s
Texture Rate
33.47 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
803.3 GFLOPS
222.8 GFLOPS
FP64 (double)
33.47 GFLOPS
Board Design
53W
TDP
49W
250 W
Suggested PSU
200 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x VGA
None
Power Connectors
None
Graphics Processor
Navi 24
GPU Name
GK208
Navi 24 XL
(215-135000046)
GPU Variant
GK208-400-A1
RDNA 2.0
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
6 nm
Process Size
28 nm
5.4 billion
Transistors
1.02 billion
107 mm²
Die Size
87 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.2
OpenCL
3.0
1.3
Vulkan
1.1
-
CUDA
3.5
6.7
Shader Model
5.1