How to overclock a Pentium D925?

[cmeyvin]

I got a pentium D925 @ 3.0GHz running on an intel 946GZ Chipset mainboard. In the BIOS there's no such option that allow overclocking. So anyone knows how to?

[mjc]

Is this a prebuilt system...like a Dell, HP, Compaq, etc?

[marik]

Yeah, because if it is a prebuilt, then you're pretty much locked in. They won't let you change those settings. The reason? They don't want too many service calls about cpu's being fried by inexperienced users. Now, I'm not saying that you are inexperienced, it's just that they don't want other users that happened to be inexperienced to go gung-ho on their cmos settings and overclock their cpu's three-fold.

[mjc]

It is actually a much simpler motivation...they'd rather you buy a new computer.

[cmeyvin]

Yeah it is pre-built, my dad bought dat a year ago. It's a NEC system. Is there anyway i can hack into those settings. The current Bus speed is 200Mhz and the multiplier is 15. So it makes 3.0Ghz. I wanna push it 3.6GHZ, am thinking of OCing the bus speed to 240Mhz

[mjc]

Not a chance...

[cmeyvin]

Hey i found out this software. It's called Intel Integrator Assistant. It allows me to change the BIOS, customize Pre-Built brand. Will i be able to OC if i change the BIOS

[mjc]

Don't try it...there is a very good chance that you will end up with a doorstop.

OEM motherboards are not 'standard', they often have 'missing' or disabled features that make OC'ing possible. If the BIOS you have doesn't have the settings to change frequencies, etc it probably doesn't have the 'safety' measures that go along with them. If you found something to change the frequency without enabling the rest of the items in a 'full' versio of the BIOS then there is a very good chance of frying the CPU.

Also, if you successfully 'change' the BIOS and still have a bootable machine, you won't be able to use the version of Windows that came with it, any longer, as it was tied the OEM board...which you no longer have. But 90++ % of the time if you try a 'full' version BIOS on an OEM board, you 'brick it"...one trick that is common on OEM boards is to use a smaller BIOS chip than the standard (a 2 MB instead of 4MB), so a full version BIOS may not actually fit on the chip...which means part of it is truncated...and that is a 'very bad thing'.

The simple fact is...OEM/prebuilt systems are designed to be replaced, not upgraded/tweaked/overclocked.

[cmeyvin]

When i first purchase it, there were no gfx card(onboard gfx), only 512MB RAM and a 250W PSU. I Changed these to 9800gtx, 4GB Ram and 500W ATRIX PSU. Have i done something wrong upgrading the system?

[mjc]

No...but that is about the extent of what can be done to it. It wasn't all that long ago that even doing that much voided your warranty...

If you want a system that can be played around with, with impunity, then you need to build it yourself...

You want to over clock...don't buy an off the shelf system.