Radeon RX 6400 vs GeForce GT 640
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 9 years and 7 months late
Boost Clock2321MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (128.0GB/s vs 28.51GB/s)
384 additional rendering cores
Lower TDP (53W vs 65W)
Score
Benchmark
FP32 (float)
Radeon RX 6400
+414%
3565
GeForce GT 640
693
3DMark Time Spy
Radeon RX 6400
+776%
3585
GeForce GT 640
409
3DMark Time Spy Extreme
Radeon RX 6400
+938%
1662
GeForce GT 640
160
Blender
Radeon RX 6400
+943%
334
GeForce GT 640
32
Graphics Card
Jan 2022
Release Date
Jun 2012
Navi II
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x4
Bus Interface
PCIe 3.0 x16
Clock Speeds
1923 MHz
Base Clock
-
2321 MHz
Boost Clock
-
2000 MHz
Memory Clock
891 MHz
Memory
4GB
Memory Size
2GB
GDDR6
Memory Type
DDR3
64bit
Memory Bus
128bit
128.0GB/s
Bandwidth
28.51GB/s
Render Config
12
Compute Units
-
768
Shading Units
384
48
TMUs
32
32
ROPs
16
12
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per SMX)
1024 KB
L2 Cache
256 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
7.216 GPixel/s
111.4 GTexel/s
Texture Rate
28.86 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
692.7 GFLOPS
222.8 GFLOPS
FP64 (double)
28.86 GFLOPS
Board Design
53W
TDP
65W
250 W
Suggested PSU
250 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
None
Power Connectors
None
Graphics Processor
Navi 24
GPU Name
GK107
Navi 24 XL
(215-135000046)
GPU Variant
GK107-300-A2
RDNA 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
6 nm
Process Size
28 nm
5.4 billion
Transistors
1.27 billion
107 mm²
Die Size
118 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
3.0
6.7
Shader Model
5.1