New PC Problem!

Not a common issue I've found without overclocking.

Can you give us the specs (processor, motherboard, RAM (e.g. DDR2-800) and power supply?).

Is the CPU fan spinning up?
Did you install the heatsink correctly?
Did you connect both sets of power lines to the motherboard? (big 24 pin connector as well as the 4 or 8 pin ATX connector, and the extra power connector for the video card if needed)
Is the video card and RAM securely in place?

Sorry if you think the above is obvious, I'm just checking.

Damn that's a nice setup you have there.

To explain the heatsink question, I wasn't sure how skilled you were with computers/diagnostics, and the 'Clear CMOS' time you were taking could have been letting something cool down enough to continue. Last week I was testing some old chips (old stuff) to see if they worked, and the same thing happened to me when the chips ran heatsink-less. Knowing you have an i7 and sounds like you know your stuff, thats obviously not it, but I just threw it in there in case.

Anywho sounds like you have a faulty or damaged part in there somewhere.
First part I'd try to swap out is the RAM (if you can find some somewhere, either really cheap crap RAM or preferrably from a spare PC or a mate). My reasoning for this hypothesis is that when my Asrock was first installed it ran the RAM speed low (like 667) on first boot, then picked up it was 1066 afterwards. So if you had faulty RAM, it'd explain the temporary start and the consinstant failures until CMOS reset.

There are other possibilities such as the board or CPU (video card is unlikely as it wont be effected by the CMOS). But my personal thoughts are to start with the RAM.

Hopefully more people post up

If you have a 'we live in 1982' PC speaker that's hooked up, then RAM or Video Card failures should/will make beep patterns. So if you haven't got one hooked up, try and do this.

Edit: the above RAM theory assumes the system powers up, e.g. fans spin but nothing happens. You should also get beeps on the PC speaker with that.

When I'm in bios i read constant 87 degree on the motherboard led, is it a eal 87 degrees or just bios showing bugged data, in windows I get around 29 degrees!

You need to get back to the basics...

One stick of ram, one hard drive, disconnect any usb devices, unplug dvd/cd roms etc.

Make sure your heatsink is secured with the appropriate amount of paste.

Try to boot AFTER a cmos clear. That means unplugging your power or flicking the switch in the back. Take the battery out, and move the jumper over one spot, then back after 30 secomds.

Now boot into the bios and setup your ram with the correct voltage and leave your timings and everything else on auto for now.