NVIDIA GeForce GTX 1080 11Gbps vs NVIDIA GeForce GT 640
We compared two Desktop platform GPUs: 8GB VRAM GeForce GTX 1080 11Gbps 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 GTX 1080 11Gbps 's Advantages
Released 4 years and 10 months late
Boost Clock1733MHz
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (352.3GB/s vs 28.51GB/s)
2176 additional rendering cores
NVIDIA GeForce GT 640 's Advantages
Lower TDP (65W vs 180W)
Score
Benchmark
FP32 (float)
GeForce GTX 1080 11Gbps
+1180%
8.873 TFLOPS
GeForce GT 640
0.693 TFLOPS
Graphics Card
Apr 2017
Release Date
Jun 2012
GeForce 10
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1607 MHz
Base Clock
-
1733 MHz
Boost Clock
-
1376 MHz
Memory Clock
891 MHz
Memory
8GB
Memory Size
2GB
GDDR5X
Memory Type
DDR3
256bit
Memory Bus
128bit
352.3GB/s
Bandwidth
28.51GB/s
Render Config
-
-
-
20
SM Count
-
2560
Shading Units
384
160
TMUs
32
64
ROPs
16
-
-
-
-
-
-
48 KB (per SM)
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
256 KB
-
-
-
Theoretical Performance
110.9 GPixel/s
Pixel Rate
7.216 GPixel/s
277.3 GTexel/s
Texture Rate
28.86 GTexel/s
138.6 GFLOPS
FP16 (half)
-
8.873 TFLOPS
FP32 (float)
692.7 GFLOPS
277.3 GFLOPS
FP64 (double)
28.86 GFLOPS
Board Design
180W
TDP
65W
450 W
Suggested PSU
250 W
1x DVI
1x HDMI 2.0
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x 8-pin
Power Connectors
None
Graphics Processor
GP104
GPU Name
GK107
GP104-410-A1
GPU Variant
GK107-300-A2
Pascal
Architecture
Kepler
TSMC
Foundry
TSMC
16 nm
Process Size
28 nm
7.2 billion
Transistors
1.27 billion
314 mm²
Die Size
118 mm²
Graphics Features
12 (12_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
6.1
CUDA
3.0
6.4
Shader Model
5.1
