Hi all. Having some strange problem with some old psu - new motheboard incompatibility and unable to determine which one is faulty.
Configuration:
Gigabyte h55m-usb3 rev.1 (new)
Core i3 530 (new)
Kingston HyperX 1600Mhz 2x2Gb Kit (new)
Psu: Zalman 360W active PFC ATX v.2.2
Samsung F3 HDD 1TB 7200 rev/min + 2 F3 1.5TB 5400 rev/min.
Compucase Midi ATX (one power switch with wires to power and reset, no case speaker)
No separate graphics adapter (system runs with built-in inside i3)
Assembled, powered on, changed BIOS settings. Saved to BIOS -> system shutdowns. Pushing power button – nothing happens. Switching PSU power off and on, clearing CMOS with jumper – the same result. Waiting for about half an hour. Pushing power switch – system starts. Changing fewer BIOS settings, saving – system shuts down and unable to switch on for 1h or less. Always the same. Eventually discovered, that there is no need to clear CMOS and BIOS values actually are saved. So I adjusted all BIOS settings, saved them, waited for an hour, switched on and installed Windows 7 and other programs without any problems. Restart goes without problems. But when I select to shut down, I am unable to switch on the system for about 1h. When I push the start button (also tried to keep it pushed for 4 sec) during that period, nothing happens. When I switch off PSU power, switch on and push start button, diodes near the memory slots flash once, ventilators on PSU and CPU began to spin, but immediately everything stops.
Flashed new BIOS F9 (original was F6) with returning to optimized default and fail save values – all the same. Overclocked some frequencies and raised some voltages – system runs very stably, but nothing repair’s this “hot start” issue.
Eventually brought the system, which I recently assembled for the friend – Athlon 2 X4, Gigabyte motherboard, case and PSU (550W, passive PFC, ATX v.2.3), Cruciall 133 Mhz memory. Connected Gigabyte PSU to my system – everything run’s OK! Zalman PSU is faulty? But when I connect this Zalman PSU to Athlon system – everything also runs OK! Tried to change memories between systems, and put memory modules into other channels, disconnected 4 pins from 24 pin ATX connection or one 4xpin connection from processor 12V 2x4 pin – everything the same. When Zalman PSU is connected to Gigabyte h55m-usb3 system, it is unable to start ~1h after shutdown and work stably when system is running regardless of other settings or system components. Once after starting, system showed “CMOS checksum error” and return to F6 BIOS, but after that I flashed new F10 BIOS, and there was no crashes so far.
So, my conclusion:
1. When Zalman PSU is connected to Gigabyte h55m-usb3 + Core i3 530 system, it is unable to start after shutdown for ~1h, other components and settings doesn’t matter. When system switches on, it runs stably.
2. When Gigabyte PSU is connected to the above system, problem disappears.
3. AMD CPU – Gigabyte motherboard system have no such “hot start” problem with any PSU.
Which component is faulty or where hides the problem?