Hi Folks,
My Asus P7P55D motherboard worked well with:
i5-750 processor
8GB Corsair DDR3 RAM at 1333MHz
Asus GTX-260 graphics card
and a recent bargain led me to try swapping the i5 for an i7-870 processor that came out of a working business machine. The "new" CPU was clean and I cleaned up the Intel CPU cooler, then installed that i7 and used a bit of Antec Formula 7 thermal paste when reinstalling the cooler.
I also installed a GTX-760-based graphics card as another upgrade.
When I plugged in the AC cord, the Standby Power LED turned on (which is correct behavior) and pushing in the Power button on the case turned on all fans (i.e., CPU, graphics card, case, power supply) as one would expect. However, there is no POST beep or display output as power-up starts - actually, the whole system seems to power up fans and drives for about 1 second, turns everything off for about 3-4 seconds, then repeats that cycle until the AC cord is unplugged - i.e., the case Power and Reset buttons are ignored by this point.
I never set the CPU or memory to run overclocked/higher voltage, so was hoping that vanilla configuration would allow a simple processor change. I have downgraded back to the old graphics card and that has made no difference in these symptoms, which leads me to believe they are somehow related to the "new" i7 processor in this configuration. Or, maybe the processor I was sold is actually bad.
Thinking of going back to test with the old i5 processor again as a test, but before doing so was wondering if this situation rang any bells for advice, please.
Thanks.
My Asus P7P55D motherboard worked well with:
i5-750 processor
8GB Corsair DDR3 RAM at 1333MHz
Asus GTX-260 graphics card
and a recent bargain led me to try swapping the i5 for an i7-870 processor that came out of a working business machine. The "new" CPU was clean and I cleaned up the Intel CPU cooler, then installed that i7 and used a bit of Antec Formula 7 thermal paste when reinstalling the cooler.
I also installed a GTX-760-based graphics card as another upgrade.
When I plugged in the AC cord, the Standby Power LED turned on (which is correct behavior) and pushing in the Power button on the case turned on all fans (i.e., CPU, graphics card, case, power supply) as one would expect. However, there is no POST beep or display output as power-up starts - actually, the whole system seems to power up fans and drives for about 1 second, turns everything off for about 3-4 seconds, then repeats that cycle until the AC cord is unplugged - i.e., the case Power and Reset buttons are ignored by this point.
I never set the CPU or memory to run overclocked/higher voltage, so was hoping that vanilla configuration would allow a simple processor change. I have downgraded back to the old graphics card and that has made no difference in these symptoms, which leads me to believe they are somehow related to the "new" i7 processor in this configuration. Or, maybe the processor I was sold is actually bad.
Thinking of going back to test with the old i5 processor again as a test, but before doing so was wondering if this situation rang any bells for advice, please.
Thanks.