Why computer power off instead of sleep?

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14 Oct 2020
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hello,
I have a recent computer whose motherboard is ASROCK X570 Phantom Gaming-ITX/TB3, a mini ITX card. At the beginning I had sleep on windows.

After having changed its cooler (the new cooler is a water-cooling CORSAIR H75), I get a strange behavior when I choose "sleep" in the windows start menu. It seems to enter to sleep mode (or power off?), but when I hit the power button to wake it up, it seems to start (the fans begin to work), but after a few seconds, it powers off and restarts but it has lost all the session's open windows and opened applications : it's like a shut down and cold boot.
When I changed my cooler, I did not entered in the bios but changed in some manner the ways the fans are connected (I added 2 4-connectors dispatcher in order to power all new fans). All my windows settings are set to "sleep" when I push the "power off" button, not to "hibernate".

Do you think it could be due to the changes in the fan connectors, or to the bios program? thank you
 
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