Thank you for being a valued part of the CNET community. As of December 1, 2020, the forums are in read-only format. In early 2021, CNET Forums will no longer be available. We are grateful for the participation and advice you have provided to one another over the years.

Thanks,

CNET Support

General discussion

Athlon 2800+ incorrect mhz

Feb 21, 2004 11:08PM PST

The Athlon XP 2800 should be runnin at 2.8gig but is posting at 1245 and system properties also shows it at 1.24gigHz. Seems I'm missing a change on the Mobo or something? Thanks

Discussion is locked

- Collapse -
Re:Athlon 2800+ incorrect mhz
Feb 21, 2004 11:22PM PST

I would check that the BIOS is current, and see what the manual notes for jumpers (if any.)

The usual is that the settings are incorrect. Since there was no make/model supplied, then you just need to read the manual on what to set for this CPU.

An out of date BIOS will mis-report the CPU so if you have such an issue, fix it.

Bob

- Collapse -
Re:Athlon 2800+ incorrect mhz
Feb 22, 2004 1:09PM PST

Athlon xp 2800+ doesn't mean 2.8 Ghz,. That is misleading, it has to do with AMD benchmark testing. Go to AMD.COM and look up your processor, it will tell you the actual speed of the processor.
Also Windows XP will correct the error in reporting in the processor speed and actually report the corect speed of the cpu.

- Collapse -
Re:Re:Athlon 2800+ incorrect mhz
Feb 24, 2004 9:05PM PST

its running at 2.083

- Collapse -
Re:Re:Re:Athlon 2800+ incorrect mhz
Feb 25, 2004 8:04AM PST

you will need to go into the BIOS into the chipset selection and increase to a higher freq.

- Collapse -
Re:Re:Athlon 2800+ incorrect mhz
Feb 25, 2004 8:06AM PST

go to Ask Amd.com this will very helpful

- Collapse -
Re:Athlon 2800+ incorrect mhz
Feb 22, 2004 3:18PM PST

Actually your Xp 2800+ should run at 2.083 gig if your multiplier is correctly set in your bios, and your front side bus is set at 333 megahertz. My Xp 2600 + runs at 2.133gig with a front side bus of 266 Megahertz
Check here for and update to your motherboard bios:(ftp.asus.com.tw) or (ftp.asus.com) or (ftp.asuscom.de)

- Collapse -
Re:Athlon 2800+ incorrect mhz
Feb 23, 2004 6:03AM PST

You need to change a jumper setting on your motherboard and you can find this in the manual for your motherboard it will tell you what you need to have the setting on

- Collapse -
Sounds simply that the memory bus and/or FSB is not set
Feb 24, 2004 6:49AM PST

correctly. The multiplier for the XP's are FIXED [can't be changed without surgery]. Thus you can only acheive 2.083 GHz when the FSB is set properly.

Many mobos have circuitry that drops the FSB back to a safe speed if you have a bad shutdown or it detects a problem. The mobo mfrs/BIOS varies on whether you set the FSB to the single speed or the double speed. Example 133 MHz or 266 MHz [an aspect of double data rate memory] the memory is clocked at 133 but it is read on both the leading and falling edge and thus reads at double the rate [266]. Same for 166 and 333.

As already stated the AMD XP 2800 + actual clock speed is 2.083 GHz. If it supports 166/333 MHZ memory the multiplier would be probably be listed as 12.5.