NVIDIA GeForce RTX 4080 vs NVIDIA GeForce GT 640
We compared two Desktop platform GPUs: 16GB VRAM GeForce RTX 4080 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce RTX 4080 's Advantages
Released 10 years and 3 months late
Boost Clock2505MHz
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (716.8GB/s vs 28.51GB/s)
9344 additional rendering cores
NVIDIA GeForce GT 640 's Advantages
Lower TDP (65W vs 320W)
Score
Benchmark
FP32 (float)
GeForce RTX 4080
+6933%
48.74 TFLOPS
GeForce GT 640
0.693 TFLOPS
3DMark Time Spy
GeForce RTX 4080
+6788%
28173
GeForce GT 640
409
3DMark Time Spy Extreme
GeForce RTX 4080
+8651%
14002
GeForce GT 640
160
Graphics Card
Sep 2022
Release Date
Jun 2012
GeForce 40
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
2205 MHz
Base Clock
-
2505 MHz
Boost Clock
-
1400 MHz
Memory Clock
891 MHz
Memory
16GB
Memory Size
2GB
GDDR6X
Memory Type
DDR3
256bit
Memory Bus
128bit
716.8GB/s
Bandwidth
28.51GB/s
Render Config
-
-
-
76
SM Count
-
9728
Shading Units
384
304
TMUs
32
112
ROPs
16
304
Tensor Cores
-
76
RT Cores
-
128 KB (per SM)
L1 Cache
16 KB (per SMX)
64 MB
L2 Cache
256 KB
-
-
-
Theoretical Performance
280.6 GPixel/s
Pixel Rate
7.216 GPixel/s
761.5 GTexel/s
Texture Rate
28.86 GTexel/s
48.74 TFLOPS
FP16 (half)
-
48.74 TFLOPS
FP32 (float)
692.7 GFLOPS
761.5 GFLOPS
FP64 (double)
28.86 GFLOPS
Board Design
320W
TDP
65W
700 W
Suggested PSU
250 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x 16-pin
Power Connectors
None
Graphics Processor
AD103
GPU Name
GK107
AD103-300-A1
GPU Variant
GK107-300-A2
Ada Lovelace
Architecture
Kepler
TSMC
Foundry
TSMC
5 nm
Process Size
28 nm
45.9 billion
Transistors
1.27 billion
379 mm²
Die Size
118 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
3.0
6.7
Shader Model
5.1
