Hope someone can give me some advice, this is a bit of a head-scratcher for me...

I've never really messed with any overclocking settings before, it's about the only PC building aspect I'm completely clueless about, apart from turning my last lot of DDR2 up to 800 from 667 I've never tried. I'm trying pretty much exactly the same thing here & it ain't having any of it.

I've just built a new box, CPU bus speed is 1333, mobo is 1333, memory is this (http://www.ebuyer.com/product/128021), which is apparently 1150, & could hopefully handle 1333.

However, on POST it mentions dual-channel 667. Looking in the BIOS there are options to change whatever manually, but even trying to set it to 800 (like I managed last time) causes it to not POST. I first tried setting it to 1333, then 1066, then 800 out of desperation.

If I set the overclocking in BIOS to manual if there any windows-based overclocking utils which will automatically turn things up slowly & test them? I seem to remember an NVidia utility a few years back that did this but have no idea if it'd do anything to memory, or whether it was just for GPU & graphics memory.

In case it's relevant in any way CPU is this (http://www.ebuyer.com/product/142898), mobo this (http://www.ebuyer.com/product/142585)

Not too sure about asus but I know abit have the uguru tweaking utility that lets you tweak frequencies and voltages - there's probably one on the CD or if not then the manufacturer's page for the board. I'd be surprised if they don't have one.

What I suspect it is though is that your ram hasn't got enough voltage going to it - I have some corsair that's 2.2v at 1066MHz, and the motherboard tried to get it going at 1.8 - that was a no go. Amazed it booted into bios to be honest.

Have a look on the ram, there should be a voltage rating on it on a sticker somewhere. If you're overclocking it try it at 0.1v increments over its rating till you get a stable boot and you should end up fine.

Hope that helps,

CrystalCPUID has voltage and multiplier management
http://crystalmark.info/software/CrystalCPUID/index-e.html#Features

and there is another utility I can't remember the name of...

probably RMClock

http://cpu.rightmark.org/products/rmclock.shtml#rmclock

Not really into dangerous sports ;)

Not really into dangerous sports ;)

Same here, hence the questioning ;)

I object to having my memory running that slow though, compared to my old PC it's still a rocket, but I want to see at least 1066 on the POST screen dammit, I bought the silly memory with heatsinks!

What I suspect it is though is that your ram hasn't got enough voltage going to it - I have some corsair that's 2.2v at 1066MHz, and the motherboard tried to get it going at 1.8 - that was a no go. Amazed it booted into bios to be honest.

Ah ha, that sounds about right, surely with the kit I have if the voltage was correct it would go advertised speed. I shall check it out when I get home.

Thanks dudes... I'll post the results assuming I can POST the PC after tinkering. :hihi:

With Asus boards they often default at 1.45 volts, doing a CMOS reset will cause the machine to boot, where by you can then set the voltage manually, this was the problem I had with my Maximus Extreme, it wasnt giving enough voltage to the ram, (it was giving it 1.45v) my ram (OCZ ReaperZ, like yours, but DDR3) it needs 1.70 minimum, im currently on 1.9v @ 1333mhz, 6-6-6-18 timings.

The issue your having does sound like its voltage related though,