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Boat
12-15-03, 12:14 AM
I've never overclocked anything (yet) and I just put together a system with a Barton 2500 (stepping AQXEA 0331SPMW) and an Asus A7N8X Deluxe. In looking over the bios settings the CPU seems to be running at 100mhz with a multiplier of 11. From the specs I see that default speed should be 166 mhz with an 11 multiplier. Why would this CPU be running so slow and what can I do to get it running at specs?
OC Detective
12-15-03, 12:31 AM
Thats just the safe mode it is booting up in - just change your FSB in the bios to 166 and start from there - to do this may require you changing the cpu frequency setting (or whatever its called in your bios) from auto to manual. BTW welcome to the forums
Gnufsh
12-15-03, 09:30 AM
Yes most motherboards default to 100MHz FSB out of the box to keep from causing problems. Just consult your manual and set it to the correct speed.
Boat
12-15-03, 12:48 PM
Thanks guys, I changed it to 166 and now I see it is running at 1800 as advertised.

By the way, I'm new to AMD chips so can someone tell me why a Barton that runs at 1800 is called a "2500+". Is an AMD 1800 somehow equivelant to an Intel 2.5 gig chip?

Thanks again.....

Boat
Bailey
12-15-03, 02:04 PM
By the way, I'm new to AMD chips so can someone tell me why a Barton that runs at 1800 is called a "2500+". Is an AMD 1800 somehow equivelant to an Intel 2.5 gig chip
Yes, AMD switched over to a " performance rating" some time ago. So far they have estimated the performance correctly & indeed a 1.8ghz AMD will run w/ or slightly ahead of a P4 2.5 depending on the application. Basically the AMD does more work per clock cycle.
David
12-15-03, 02:13 PM
The PR speed rating is intended to be a comparison to a CPU using the Thunderbird (Athlon) core.

I.e. a Barton at 1.83GHz would be as fast as a theoretical Thunderbird CPU at 2.5GHz (which dont exist).
stamasd
12-15-03, 02:28 PM
Originally posted by David
The PR speed rating is intended to be a comparison to a CPU using the Thunderbird (Athlon) core.

I.e. a Barton at 1.83GHz would be as fast as a theoretical Thunderbird CPU at 2.5GHz (which dont exist).

That's the official explanation indeed, but I don't think anyone's fooled by that. :)