CPU rating is way off

[shamrock_uk]

Hello all, hope someone out there can shed some light....

have just installed an Athlon XP 2GHz with a Palamino core into my Epox 8k7a+ board...the CPU compatibility list reckons that up to 2.1GHz Palamino is aok with this board. However, when going through the POST, under 'Main Processor' it displays the following:

AMD Athlon 4 1248MHz (96x13.0), FSB 192

Obviously something aint quite right, cuz there are 800MHz getting lost in there somewhere. Anyways, i got the old calculator out and went to change the CPU ratio values using the SW2 switch. For a CPU speed of 2000 MHz and a maximum FSB speed for the motherboard of 266MHz i got a ratio of 7.51 (2000 / 266). According to the manual, 0,1,1,0,1 should do the trick for a ratio of 7.5, but when i change the switches to reflect this and turn the computer on, there is no output to the monitor and the LED on the motherboard displays FF.

When the SW2 switches are reset back to all off, the computer boots fine, but with the lower clock speed. Does anyone have any suggestions? I've tried resetting the CMOS in between changing the switches but to no avail...i was upgrading from a 1.1GHz processor so it really would be nice to have a little more than 100MHz gain.

Thanks in advance

col

[Allan]

Hey shamrock, welcome to AOA!

Have you tried updating your BIOS? It could be that your BIOS isn't able to recognize the CPU - but it might be able to after a BIOS update.

[dod]

Originally Posted by shamrock_uk

Hello all, hope someone out there can shed some light....

have just installed an Athlon XP 2GHz with a Palamino core into my Epox 8k7a+ board...the CPU compatibility list reckons that up to 2.1GHz Palamino is aok with this board. However, when going through the POST, under 'Main Processor' it displays the following:

AMD Athlon 4 1248MHz (96x13.0), FSB 192

Obviously something aint quite right, cuz there are 800MHz getting lost in there somewhere. Anyways, i got the old calculator out and went to change the CPU ratio values using the SW2 switch. For a CPU speed of 2000 MHz and a maximum FSB speed for the motherboard of 266MHz i got a ratio of 7.51 (2000 / 266). According to the manual, 0,1,1,0,1 should do the trick for a ratio of 7.5, but when i change the switches to reflect this and turn the computer on, there is no output to the monitor and the LED on the motherboard displays FF.

When the SW2 switches are reset back to all off, the computer boots fine, but with the lower clock speed. Does anyone have any suggestions? I've tried resetting the CMOS in between changing the switches but to no avail...i was upgrading from a 1.1GHz processor so it really would be nice to have a little more than 100MHz gain.

Thanks in advance

col

Hi Shamrock welcome to AOA

I just checked the compatability site and what it says is that it is capable of running an XP2100. Unfortunately, because of AMD's Performance Rating /naming policy that is not the same as 2100 MHz. An XP2100 actually runs at 1733 MHz if I remember correctly with default settings of 133 FSB and a multi of 13.

Now, If you actually have a 2000 MHz processor then it will be called an XP2400, which may or may not work with your board according to the compatability chart. ( A Bios update might fix it, or may already have though) You would be looking for 133 FSB and 15 multiplier.

If it's an XP2000 processor the default is 133 and 12.5. for 1666 ish MHz.

Looking a your settings you need to change your FSB to 133 in the bios, leave the multiplier at default and you should be good .

[shamrock_uk]

thank you both for the speedy reply and the welcome

i had a quick glance through the BIOS updates and none of the fixes seemed to refer to the CPU, but i'll go back through them and download the latest to be safe.

And yeah sorry, i was being sloppy...it is an XP2000+ that i bought (not that stupid! ) but me being a muppet forget that the clockspeed is different...i'll get right on that, although will probably be tomorrow for the pub beckons

take care and thanks again

col

[SteveI]

Sounds like all you have to do is change the fsb to 133 in the bios.

Unless you have super cooling, a palamino will NOT run 2.0 ghz.

An XP2000+ will run stock at 1666mhz (12.5x133.3).

[shamrock_uk]

yep, thanks to all who replied, just needed to change the FSB, it worked fine on the default SW2 switches...aah..it's amazing how forgetful we can be

thanks again

[Allan]

No problem, it is good you got it working. Now how about putting that puppy to work? We could sure use your help.

Check out our folding@home section for more info..
http://www.aoaforums.com/forum/19-samuknows-aoa-folding-home-team/

[timbob2469]

That's great you got it going. And that folding is a good way to check for stability plus it is for a good cause.
Bob