NVIDIA GeForce GTX 660M vs NVIDIA GeForce GT 420M

General Information

Let's compare video cards NVIDIA GeForce GTX 660M vs NVIDIA GeForce GT 420M on basic information that will help you immediately determine which model is suitable in terms of cost (data are taken from public sources based on the analysis of the average cost of video cards in marketplaces Amazon, Ebay, Aliexpress). Comparing graphics cards can help you answer the following questions:
1) Which graphics card is better, NVIDIA GeForce GTX 660M or NVIDIA GeForce GTX 660M?
2) How to choose the right graphics card and what should I pay attention to?
3) How powerful is the graphics card and for what games is it suitable?
4) Can the video card be used in mining?
5) What scores did the video cards NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M get in benchmarks.
This is by no means a complete list of questions that you will learn the answers to. In the start description you will understand when the video card was manufactured, its place in the overall performance rating, the ratio of performance to cost, the code name of the graphics core and the name of its architecture. Also the segment of use, where and in what computers the video card can be installed. 

Technical Specifications Graphics Card

Comparing graphics cards NVIDIA GeForce GTX 660M vs NVIDIA GeForce GT 420M in terms of technical specifications, which directly affect the final gaming, performance or mining performance. 
Dear visitors, in the technical specifications comparison block there is a preference highlighting (highlighted in yellow), so it will make it easier for you to study the advantages and disadvantages of the models 
What you need to pay attention to here:
1) GPU core starting clock speed and turbo mode.
2) The number of transistors, the more the better.
3) Thermal efficiency and the required TPD power. The higher the value, the more powerful power supply and motherboard will be needed.
4) The manufacturing process (lithography), indicated in nanometers, the smaller the value, the more advanced the graphics card.
Do not forget to study the comparison of video card test results in benchmarks, it will complement the overall picture of the analysis when reviewing the advantages and disadvantages.

Dimensions and Compatibility

A comparison of video cards NVIDIA GeForce GTX 660M vs NVIDIA GeForce GT 420M in terms of length, connection interface, as well as the number of required pins for power on the motherboard (power supply). 
If you are considering a new graphics card to upgrade your system, you should consider the following:
1) Measure the length of your existing graphics card; if it is shorter, you will have to buy an extra larger system case. This will be useful not only for the video card to fit there, but also for more efficient cooling of the system.
2) The number of power phases on the motherboard and power supply compatibility. High performance graphics cards require higher wattage power supplies and some of them need more pins to be connected to the motherboard. So make sure that your motherboard supports the video card.
This is all you need to know when analyzing a comparison between graphics cards NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M in connection interface and main dimensions.

Graphics memory (technical specifications)

Video memory comparison NVIDIA GeForce GTX 660M vs NVIDIA GeForce GT 420M A very important model comparison unit, here you will understand which video card deserves your attention and which you can safely forget. In today's reality, new working applications, even games, are becoming more demanding on the hardware resources of the computer, where video memory is one of the important ones. The more memory of the video card, the faster the data is processed and less lag is observed when watching video, gaming, rendering. 
Which video card to choose by memory between NVIDIA GeForce GTX 660M and {{video_card_name_2}?
1) Look at the GDDR type. The higher it is, the more modern and performant the model is.
2) How much memory is installed? The more memory, the faster multiple data sets will be handled.
3) Bandwidth. The higher the figure, the better.
4) Memory bus width. Similar to the fourth point.

As you can see, determining the winner of this comparison is not that difficult. You just need to compare the characteristics and decide in favor of the model with the best performance.

Port and Display Support

Port and display support for NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M may be different. When comparing models, it is important to determine what type of monitor and other external devices connection is provided, this is important for connecting not only multiple monitors, but also other accessories. 
For example, DisplayPort and HDMI differ drastically in the quality of the digital signal transmission, plus if you are looking to buy a new graphics card from these two models, it is important to consider which connector is available on your monitor, as you may need to buy a new cable or adapter DisplayPort > HDMI or vice versa.
When comparing NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M, choose the graphics card with the more modern HDMI port.

Technologies

Let us compare video cards NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M according to the technologies their manufacturers have implemented. For your reference, not all video card models have these specifications, so a comparison of video card technologies may not occur if one of the two models being compared lacks this specification.
In a comparison between NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M it is possible to give advantage to the model which has at least some technological advantages. It does not affect the overall performance in any way, so we can consider the presence of technology as a simple bonus.

API support

A basic comparison of GPUs NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M for different API versions. 
An API (Application Programming Interface) is a programming interface for interacting with various software.
This information will be useful if you:
1) Looking for a video card to develop applications or programs.
2) Looking for the best graphics card for a developer (universal solution).
3) Want to find the best graphics card for computer or mobile game development.
4) Looking for a graphics card for coding.
No matter what you are looking for you need a graphics card for, you should choose the one that is right for your price and you will find basic API support for developing applications and programs in any of them.

Mining hashrates

Let's compare mining video cards NVIDIA GeForce GTX 660M and NVIDIA GeForce GT 420M. Before exploring the evaluation of cryptocurrency mining, you should know that not all models are suitable for such use. Video cards with less than 8 gigabytes of memory will simply not recoup their cost. 
The complexity of mining is increasing every year, so if you are looking for a video card for a fast payback - you need to pay attention to the top models, which are on the first lines of video cards rating. 
It is very important to understand that video cards in cryptocurrency mining mode work uninterruptedly, almost to the wear and tear of their hardware resource. That is why even the most expensive models often break down.