As the pair of eleven approaches, there will be a wave of buying, and the merchants are all ready to move. If you don't know a little about computer, you can easily become a "little lamb" that you can kill. Nowadays, the most popular online shopping assembly computer solves the problem of most white purchases. At the same time, many players have inexplicably boarded the "martyr wall". As for the wall of the martyrs, the matter of science is handed over to the mother, Xiaobian here mainly talks to you about the "hole money" approach of the whole machine business.
Pit money method 1: antique inventory "refurbishment" to sell
This is the most pitted mode in all DIY machines, and it is also the mode of despising the most scorn. It takes 4~5 years ago U, board, card, seemingly high running points, very strong computer configuration, but in fact all It is a product that has been eliminated. There is a rule in the electronics industry: buying new ones doesn't buy old ones. Even the best goods, after a few years, it can only be pressed at the bottom of the box or thrown away when the garbage.
The picture below is a small chicken computer that is searched on a treasure, or is ranked very high.
Zhiqiang X series processor, server-specific, online search, give the quotation is super high, as if a big bargain. Do you think businesses are so stupid? Light a CPU is so high, the entire host can not be sold. The possible parameters are still quite powerful, but the actual performance is worrying, especially for the game, the server U has no optimization. In addition, the era of CPU + motherboard + graphics card can be traced back to the "last century", are you sure you want to buy this kind of thing?
Can't rule out whether it belongs to refurbishment or second-hand goods~
Pit 2: The “perfect configuration†of the 3rd and 4th line brands
Why is there a hierarchy of brands? The principle of “a penny and a share†applies to any trading scenario. Without sufficient quality assurance, its products will never be high-end. In the DIY industry, the pirate ship (commonly known as the "shipyard") has always been a symbol of high-end, its price is extremely high, but still has a lot of iron powder, only because of the quality placed there.
Like the following configuration, 3A platform, bulldozer with RX560 graphics card, at first glance, the configuration is still high-end, but in fact, look at the specific brand, model, you know why this host will sell so cheap.
Memory: Black King Kong? The one who is standing on the high building and flying?
Graphics card: XFX, what is it? A Baidu has a history of several decades, and it is actually a second- and third-line brand.
Power: Jinhetian? The "founder" of domestic power supply, forever "founder."
0-10V/PWM/RX Dimming Driver
Drivers with dimming capability can dim the LED light output over the full range from 100% to 0%. Dimming drivers can dim LEDs by reduction in the forward current, pulse width modulation (PWM) via digital control, or more sophisticated methods. Most dimming drivers operate using the PWM method. With this method, the frequency could range from a hundred modulations per second to as high as hundreds of thousands of modulations per second, so that the LED appears to be continuously lighted without flicker.
At present, the most commonly used LED dimming power: LED thyristor dimming power, LED 0 / 1-10V dimming power, PWM dimming power supply. Other dimming works by controlling the current and voltage, the frequency of the output to achieve the LED dimming function.
10V Dimmable Led Driver,Led Pwm Driver,Constant Current Driver Dimmable
ShenZhen Fahold Electronic Limited , https://www.fahold.net