NVIDIA GeForce RTX 4080 12 GB vs NVIDIA GeForce GT 640 OEM Rebrand
We compared two Desktop platform GPUs: 12GB VRAM GeForce RTX 4080 12 GB and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce RTX 4080 12 GB 's Advantages
Boost Clock2610MHz
More VRAM (12GB vs 1536GB)
Larger VRAM bandwidth (504.2GB/s vs 38.40GB/s)
7536 additional rendering cores
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Lower TDP (75W vs 285W)
Score
Benchmark
FP32 (float)
GeForce RTX 4080 12 GB
+9560%
40.09 TFLOPS
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Graphics Card
Unknown
Release Date
Apr 2012
GeForce 40
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
2310 MHz
Base Clock
-
2610 MHz
Boost Clock
-
1313 MHz
Memory Clock
800 MHz
Memory
12GB
Memory Size
1536MB
GDDR6X
Memory Type
DDR3
192bit
Memory Bus
192bit
504.2GB/s
Bandwidth
38.40GB/s
Render Config
-
-
-
60
SM Count
3
7680
Shading Units
144
240
TMUs
24
80
ROPs
24
240
Tensor Cores
-
60
RT Cores
-
128 KB (per SM)
L1 Cache
64 KB (per SM)
48 MB
L2 Cache
384 KB
-
-
-
Theoretical Performance
208.8 GPixel/s
Pixel Rate
4.320 GPixel/s
626.4 GTexel/s
Texture Rate
17.28 GTexel/s
40.09 TFLOPS
FP16 (half)
-
40.09 TFLOPS
FP32 (float)
414.7 GFLOPS
626.4 GFLOPS
FP64 (double)
34.56 GFLOPS
Board Design
285W
TDP
75W
600 W
Suggested PSU
250 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
2x DVI
1x mini-HDMI 1.3a
1x 16-pin
Power Connectors
None
Graphics Processor
AD104
GPU Name
GF116
AD104-400-A1
GPU Variant
GF116-150-A1
Ada Lovelace
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
4 nm
Process Size
40 nm
35.8 billion
Transistors
1.17 billion
295 mm²
Die Size
238 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
1.1
1.3
Vulkan
N/A
8.9
CUDA
2.1
6.6
Shader Model
5.1
