What computer monitor to choose during pc building?

Screen size is just outer view. There are lot more aspects to consider beyond the screen size. One aspect of PC monitors that you do need to consider though is resolution. While 1080p was once the gold standard, today it’s just the baseline. If you’re happy to spend a little more, there are a few other options worth considering, especially if you want to improve screen space or gaming visuals. Resolution isn’t the be-all and end-all of monitor features, though. In fact, too much resolution on too small of a screen can often be annoying, because it shrinks all images down and forces you to enlarge everything to easily read it.

• 1080p: If you want reasonable clarity, but want to save on cost or focus on other, more important features, 1080p is where it’s at — as long as the monitor you’re buying isn’t extremely large. 1080p is ideal for 21-inch to 24-inch displays. These monitors offer great picture quality, and now that they are competing with 4K the prices are rock-bottom. If you want to go larger than 24 inches, though, you should consider 2,560 x 1,440 resolution at the least, and perhaps 4K.
• 1440p: The oft-forgotten step-child in the gradual marriage of consumers and 4K, 1440p is still the suggested resolution for gamers, as it offers a noticeable improvement in visuals over 1080p, but doesn’t overly tax your graphics card. It’s also far more affordable if you’re interested in extra features like high refresh rates.
• 4K: 4K is the resolution that the industry is most keen to drive consumers towards. It looks much more detailed than 1080p, with 3,840 x 2,160 pixels and prices have come down substantially in the past few years. That said, gamers will need a powerful graphics card to run a system at this resolution and finding affordable monitors with full suites of frame synching support or high-refresh rates is still difficult. There is plenty of 4K media out there to enjoy though, whether you’re streaming or using UHD Blu-Rays.
• 5K: This resolution made headlines when Apple debuted it on its iMac, but it’s far from common resolution even years later. Dell’s UP2715K is a great looking display, but we would recommend many high-end 4K monitors before it as you won’t be able to see too much difference between them.
• 8K: There are some 8K monitors available as well, notably Dell’s 8K Ultrasharp. There’s not really any need for a monitor with such a high resolution at this time, but they are available for those with the budget if resolution is absolutely the most important thing.

Aspect ratio: The aspect the screen shows images in (length compared to height). A common standard, and your best bet, is 16:9. It works with plenty of content and it’s great for movies or games. Some fancy monitors like to stretch things out with ratios like 21:9, but that is more suitable for unusual work situations or hardcore gaming. Another common format, 16:10, provides slightly more vertical space for viewing multiple open documents or images. 3:2 is becoming more commonplace in laptops for better web viewing, but that’s rare on standalone displays.