The LED connected to the computer's power supply to the 12V line is unstable (on and off), why?

Question

Do it yourself

I connected a 12V LED with a power of 10W to the computer power supply via MOLEX: the plus of the LED is connected to the yellow wire, and the minus to the black one. That's right, right?
At first it burns normally (but it was embarrassing - it warmed up noticeably), then from time to time it goes out, then it will light up again, and sometimes it does not burn at full strength. It's as if the BP restricts his food at his own discretion. On the second BP the same thing. Both are FSP.
By the way, such an LED:

Can someone tell me why so?

Answer 1

With a non-zero probability, you have already ruined your LED.
It is necessary to limit the current flowing through the LED.
To get acquainted with the basics -
https://ru.wikipedia.org/wiki/%D0%A1%D0%B2%D0%B5%D...
katod-anod.ru/articles/73

Answer 2

even the Chinese indicate on their LEDs not voltage, but current for 10 watt -900mA, for example, and voltage is indicated only as an approximate voltage drop

Answer 3

LEDs don't care as much about voltage as they do about current. You can't connect without a resistor. and such powerful LEDs in general should not be turned on even without a radiator. knowingly they are flat, aluminum-based and with holes

Answer 4

It is better to connect not through a resistor, but through a current source, there are special power supplies for LEDs