I just bought a new power supply Corsair CX430 V2 in order to meet the needs of a new graphics card I hope to install. The motherboard is the micro-ATX form factor Asus P5KPL-AM/PS running a Intel C2D E7200 CPU and 2x2GB of DDR2-800 RAM.
Problem: the computer doesn't boot with the new PSU.
The case Power LED turns on alongwith the PSU and CPU fan for about 3-4 seconds before switching off. The comp. works just fine with the current PSU which is a local brand 400W conforming to ATX12V1.3. The new PSU works fine with three other motherboards: two AMD-based ones and one old Gigabyte LGA775 board running a P4 HT chip.
On my motherboard, the following combinations were tried with no success:
1)20+4 pin connector plugged in; each half of the 4+4 ATX 12V connector plugged in, by turn.
2)20 pin connector plugged in; each half of the 4+4 ATX 12V connector plugged in, by turn.
3)20+4 pin connector plugged in; the 4+4 ATX 12V connector not plugged in.
In the above attempts, no other peripherals or add-on cards were present.
With the old PSU, the 20+4 as well as the CPU 4-pin connector is plugged in.
My dealer-engineer is blaming it on motherboard compatibility but that doesn't seem to be the issue.
The motherboard manual on p1-28 says, "we recommend that you use a power supply unit (PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum power of 400 W.". The new PSU, as per the manufacturer, "is backward compatible with ATX12V 2.2 and ATX12V 2.01 systems".
Any suggestions on what the issue may be or how to proceed next?
