ATX电源：20或24针？

主板的20针ATX电源线和24针ATX电源线有什么区别？我看到Cooler Master Silent Pro PSU有一个可扩展的插头，显示20针+ 4可插针。

由于我的主板有24个针脚，因此遇到了麻烦，因此我尝试仅连接前20 个针脚，并且系统正常启动。

我很好奇：任何ATX主板都可以运行20针电源吗？我会简单地体验到较低的性能吗？

从http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20 -

You can plug a 20 pin ATX power cable into a motherboard with a 24 pin ATX
connector [...] The 24 pin motherboard connector is actually just the 20 pin
connector with 4 extra pins added on the end. The original 20 pins were
unchanged. The extra 4 pins are not separate rails. They're just extra lines
to provide more current to the same rails. [...] I've never heard of exceptions
and it doesn't make sense for motherboard makers to create any.

和...

A 20 pin power cable only fits into one end of a 24 pin motherboard connector
so you can't insert it incorrectly.

但是，我认为20针ATX PSU上似乎没有电流限制。

They added those extra 4 pins for a reason. When you plug a 20 pin cable into a
24 pin connector you're not providing the extra current carrying capacity which
may be needed by the motherboard. If your motherboard's current requirements are
low enough then it will work properly with only a 20 pin power cabled plugged in
. But if the motherboard draws enough current, then you can overheat the 20 pins
you're using on the 24 pin connector. I've seen enough pictures of burned ATX
main connectors to assure you that this happens. [...] Connectors really do get
hot if you overload them so the safest thing to do is use a real 24 pin power
supply on a motherboard with a 24 pin connector. Note that your 24 pin machine
may work fine with a 20 pin power supply until you add a PCI Express card later
on down the road. PCI Express cards can draw up to 75 watts through the
motherboard connector so adding an expansion card can substantially increase
power draw through the main power cable.

最后，顺便说一句：

If you have an ATX power supply with a 24 pin main cable, it's okay to plug it
into a motherboard with a 20 pin connector.

可能的答案：

http://www.techimo.com/forum/general-tech-discussion/160728-power-supply-use-20-pin-24-pin-board.html

额外的4个引脚用于为PCI-E图形卡供电。如果您不使用PCI-E卡，则可以使用20针连接器。如果您使用的是PCI-E卡，只要该卡具有外部电源连接并直接连接到电源，那还是可以的。

由于我的图形卡上有直接的PSU连接，我相信我可以使用20针的罚款，尤其是在这样可以停止计算机故障的情况下