GeForce GTX 970 vs GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 4GB VRAM GeForce GTX 970 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 970 's Advantages
Released 1 years and 4 months late
Boost Clock1178MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (224.4GB/s vs 40.06GB/s)
1280 additional rendering cores
GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 148W)
Score
Benchmark
FP32 (float)
GeForce GTX 970
+388%
3920
GeForce GT 640 Rev. 2
803
Graphics Card
Sep 2014
Release Date
May 2013
GeForce 900
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x8
Clock Speeds
1050 MHz
Base Clock
-
1178 MHz
Boost Clock
-
1753 MHz
Memory Clock
1252 MHz
Memory
4GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
64bit
224.4GB/s
Bandwidth
40.06GB/s
Render Config
1664
Shading Units
384
104
TMUs
32
56
ROPs
8
48 KB (per SMM)
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
512 KB
Theoretical Performance
65.97 GPixel/s
Pixel Rate
8.368 GPixel/s
122.5 GTexel/s
Texture Rate
33.47 GTexel/s
3.920 TFLOPS
FP32 (float)
803.3 GFLOPS
122.5 GFLOPS
FP64 (double)
33.47 GFLOPS
Board Design
148W
TDP
49W
300 W
Suggested PSU
200 W
1x DVI
1x HDMI 2.0
3x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x VGA
2x 6-pin
Power Connectors
None
Graphics Processor
GM204
GPU Name
GK208
GM204-200-A1
GPU Variant
GK208-400-A1
Maxwell 2.0
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5.2 billion
Transistors
1.02 billion
398 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
