GeForce GTX 980 Ti vs GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 6GB VRAM GeForce GTX 980 Ti 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 GTX 980 Ti 's Advantages
Released 2 years and 1 months late
Boost Clock1076MHz
More VRAM (6GB vs 1024GB)
Larger VRAM bandwidth (336.6GB/s vs 40.06GB/s)
2432 additional rendering cores
GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 250W)
Score
Benchmark
FP32 (float)
GeForce GTX 980 Ti
+654%
6060
GeForce GT 640 Rev. 2
803
Graphics Card
Jun 2015
Release Date
May 2013
GeForce 900
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x8
Clock Speeds
1000 MHz
Base Clock
-
1076 MHz
Boost Clock
-
1753 MHz
Memory Clock
1252 MHz
Memory
6GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
64bit
336.6GB/s
Bandwidth
40.06GB/s
Render Config
2816
Shading Units
384
176
TMUs
32
96
ROPs
8
48 KB (per SMM)
L1 Cache
16 KB (per SMX)
3 MB
L2 Cache
512 KB
Theoretical Performance
103.3 GPixel/s
Pixel Rate
8.368 GPixel/s
189.4 GTexel/s
Texture Rate
33.47 GTexel/s
6.060 TFLOPS
FP32 (float)
803.3 GFLOPS
189.4 GFLOPS
FP64 (double)
33.47 GFLOPS
Board Design
250W
TDP
49W
600 W
Suggested PSU
200 W
1x DVI
1x HDMI 2.0
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x VGA
1x 6-pin + 1x 8-pin
Power Connectors
None
Graphics Processor
GM200
GPU Name
GK208
GM200-310-A1
GPU Variant
GK208-400-A1
Maxwell 2.0
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
8 billion
Transistors
1.02 billion
601 mm²
Die Size
87 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
5.2
CUDA
3.5
6.4
Shader Model
5.1
