如果您正在執行有史以來第一次RAM升級，那麼看到一小塊RAM模組突然“晶片脫落”可能是一個非常令人擔憂的事件。但是，它是像它看起來那麼糟糕還是RAM模組仍然可用？今天的超級使用者問答帖子回答了一位憂心忡忡的讀者的問題。

今天的問答環節是由SuperUser提供的，SuperUser是Stack Exchange的一個分支，是一個由社群驅動的問答網站分組。

問題

超級使用者讀者m-oliv想知道RAM模組上的灰色封頂是什麼：

I was upgrading the RAM on my laptop and, after removing a RAM module, one of the little gray-capped things (circled in red in the image below) came off. Can someone please tell me what these things are and, if it is a potential danger to my laptop, should I replace the RAM module that had the piece knocked loose?

RAM模組上有什麼灰色封頂的小東西？

答案

超級使用者貢獻者Ruscal和Mokubai為我們提供了答案。首先，Ruscal：

That is most likely a capacitor. While not dangerous in the traditional sense, it is necessary for the proper and c***istent functionality of the RAM module. So yes, you should c***ider this module busted and replace it. A decoupling capacitor acts as a noise filter that will help clean signals on the module, but without it, signal noise could cause bits to flip improperly/unexpectedly.

While that will not fry your computer, it could cause “strangeness” in your programs or operating system, such as hiccups in operation, bad data saves, or even full system crashes. If the computer is not in an electrically noisy environment, you may not even notice a difference. That said, I would still replace it as soon as I could.

As a general rule, when bits are removed from (or fall off of) an electrical circuit, it fundamentally changes the properties of the circuit. That makes it so it will not operate as intended (if at all), which is a polite way of saying “broken”.

接著是莫庫拜的回答：

Those are almost definitely capacitors. I know because we use them extensively in electronics. The design of the board and position of the capacitors makes me strongly believe that they are simply decoupling capacitors. We put them across the power line and ground on a microchip like this as a filter to get rid of any noise on the chip power supply.

Its having been knocked off will not damage your computer unless it tore a bit of track so that the pads are now shorted together. Make sure that the pads are clear. Other than that, the worst that would happen is the RAM module might “mi**ehave” at times, though it would be difficult to say how problems might manifest.

The capacitor is essentially an open circuit to DC voltages, but effectively connects high frequency noise to a ground. There are generally a few placed close together near any lines that need protection, and losing one probably will not actually affect the RAM module much, if at all, but it might.

In case you care, the little black 8 pin packages at the bottom are 4-way resistor packs, almost certainly terminating the data lines going to the chips.

有什麼要補充的解釋嗎？在評論中發出聲音。想從其他精通技術的Stack Exchange使用者那裡瞭解更多答案嗎？在這裡檢視完整的討論主題。

圖片來源：Jaroslaw W（Flickr）