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Nothing interesting came from my testing. I lend other not server grade motherboard from my Friend (1151 socket). It wont boot exactly same as Asus does not... Really crazy thing.

Sorry but I am afraid I do not follow. Which two points are you suggesting to check if there is short?

Thanks for input. In both cases I pług EPS CPU power pług. Moreover supermicro is server psu and doesnt have pcie graphic carda pług. I checked with PCI post board and codes are get are 78 and 15 randomly.

Hello Thank you for you input. I really appreciate your will to help. Ad 1) I know there is such connector in supermicro PSU without having it connected supermicro mobos booted successfully. Ad 2) Hard to confirm or not. When pressing power button on Asus motherboard, supermicro PSU starts...

I am really confused now. Indeed in PWS-920P-SQ specs I read: +5V N/A +12V 75A +3.3V N/A 5V Standby 4A However I connect this PSU over Power Distributor pdb-pt846-8824. This is ATX compliant. I just checked with multimeter and I got 3,3V, 5V and 12V out of ATX connector. With this...

This is DIAG_VGA not DIAG_CPU. Its even more misterious. I use onboard VGA.

Yes, exactly. Somehow Asus P8B WS does not like any of Supermicro PSU. While old P4 motherboard boots with that just fine. I have no idea what may be wrong. Does anyone heard about such misterious incompatibility?

Hi I have strange problem. I use Asus P8B WS motherboard in Supermicro Chassis. By now I had Corsair 1000W PSU. I decided to change it to PWS-920P-SQ. But Motherboard wont boot. DIAG_CPU led is always on. Of cource I connected 8 pin cpu cable. I tested another Supermicro PSU and same result...

Maybe there is limitation that disks within same virtual drive cannot be under two SAS Expanders. However I havent found such in manuals.

Hi I have MegaRAID LSI 9265-8i card and two SAS Expanders IBM (Lenovo) 03X3834 and 19 3TB disks. Question is how to properly connect two SAS Expanders to this MegaRAID card? If I just connect one cable from MegaRAID to first SAS Expander and second cable to second SAS Expander every time I boot...

Hello I updated firmware to 2.10. What may be the reason part of my WD30EFRX drives negotiate 3gbps and part 1.5gpbs? I have two HP SAS drives that negotiate 6gpbs (expected).