GeForce RTX 4090 D vs GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 4090 D 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
GeForce RTX 4090 D Advantages
Released 10 years and 7 months late
Boost Clock2520MHz
More VRAM (24GB vs 1024GB)
Larger VRAM bandwidth (1008GB/s vs 40.06GB/s)
14208 additional rendering cores
GeForce GT 640 Rev. 2 Advantages
Lower TDP (49W vs 425W)
Score
Benchmark
FP32 (float)
GeForce RTX 4090 D
+9058%
73540
GeForce GT 640 Rev. 2
803
Graphics Card
Dec 2023
Release Date
May 2013
GeForce 40
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x8
Clock Speeds
2280 MHz
Base Clock
-
2520 MHz
Boost Clock
-
1313 MHz
Memory Clock
1252 MHz
Memory
24GB
Memory Size
1024MB
GDDR6X
Memory Type
GDDR5
384bit
Memory Bus
64bit
1008GB/s
Bandwidth
40.06GB/s
Render Config
114
SM Count
-
14592
Shading Units
384
456
TMUs
32
176
ROPs
8
456
Tensor Cores
-
114
RT Cores
-
128 KB (per SM)
L1 Cache
16 KB (per SMX)
72 MB
L2 Cache
512 KB
Theoretical Performance
443.5 GPixel/s
Pixel Rate
8.368 GPixel/s
1149 GTexel/s
Texture Rate
33.47 GTexel/s
73.54 TFLOPS
FP16 (half)
-
73.54 TFLOPS
FP32 (float)
803.3 GFLOPS
1149 GFLOPS
FP64 (double)
33.47 GFLOPS
Board Design
425W
TDP
49W
800 W
Suggested PSU
200 W
1x HDMI 2.1
3x DisplayPort 1.4a
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x VGA
1x HDMI 1.4a
1x VGA
1x 16-pin
Power Connectors
None
Graphics Processor
AD102
GPU Name
GK208
AD102-250-A1
GPU Variant
GK208-400-A1
Ada Lovelace
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
5 nm
Process Size
28 nm
76.3 billion
Transistors
1.02 billion
609 mm²
Die Size
87 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
8.9
CUDA
3.5
6.7
Shader Model
5.1
