Bought a brand-new Intel Quad-core CPU which arrived today, i spent all day taking out my old components from the case and installing the new motherboard which arrived yesterday and the new RAM which also arrived today, all compliant with each other. The motherboard is a Gigabyte GA-P35-DS3L. I finally (after wrestling with it) managed to install the stock Intel heatsink fan correctly. What muppet designed it that way? Such an awkward thing to install, my thumbs hurt for ages trying to push the pins in until they clicked! Anyway, i re-inserted all of my peripherals and went to boot it up (with the side panel off just to clarify functionality of it all), but i quickly discovered the title of this thread was happening. I checked and re-checked the ATX_12V CPU power socket as well as the CPU fan power socket and they were fine. I would find it hard to believe it's the PSU as it's a pretty decent one running at 600W, i've been using it in my old system for a couple of years now without any trouble at all. - Infact it's what's powering me now as I re-assembled my old system so i could google the problem.
Incidentally, the new RAM was thus: http://microdirect.co.uk/(18241)Geil-Black-Dragon-DDR2-40GB-PC6400-Quad-Channel.aspx
Incidentally, the new RAM was thus: http://microdirect.co.uk/(18241)Geil-Black-Dragon-DDR2-40GB-PC6400-Quad-Channel.aspx