Bought AMD Athlon XP 2600, but says 2400 in Bios

In BIOS when computer starts/restarts, it says AMD Athlon XP 2400.

It says 2400 when I have it overclocked (I think).
In BIOS CPU Setup, there are 2 stuff I can modify.
If both are set to 133 and 133, then it displays AMD Athlon XP 2400. When I set both to 100 and 100, then it displays AMD Athlon XP 1800.

What are these numbers, 1800, 2400 and 2600?

Does 1800 mean 1.8ghz normal speed and does 2400 mean 2.4ghz overclocked? Then why does it say AMD Athlon XP 2600 on the label/receipt of item?

------------Another Question------------
My CPU temperature seems awfully high, it's 129*F (around 50*C). Is this normal or bad?

I only have 1 fan on top of the CPU and don't have any other fans except one in power supply and one in video card.

I just ordered a 80mm case fan, too... do you think it will reduce the CPU temperature?

Thanks!

hello,
AMD's modern processors' clock speed are always lower than the stipulated real speed. I don't know the exact numbers but here is an example : Your AthlonXP 2600 are rated as 2.6ghz but the actual clock speed of the chip is lower than that, maybe around 2.2ghz...i think. The thing is your chip is as fast as any 2.6ghz chip out there, though sometimes in the BIOS it shows it at a lower speed. Read the manual provided with the chip to verify the clock speed and you should be okay.
Temperatures below 60c should be okay enough, though AMD rated it much higher than that. It would be nice to have a chasis fan blowing out hot air though..

What chip do you have (barton or t-bred)? What mobo and bios revision? Also, what clock speed do you show? The 2400 and 2600 have pretty similar clock speeds, depending on the chip, so your bios might be mistaking one for the other, esp if you have changed the multiplier as well.

Chips:
North bridge: SiS746 URL
South bridge: SiS963L URL

The website says "SiS746 features an AGP 8x bridge, and a DDR-333 Memory controller, supporting AMD Athlon S2K FSB up to 266Mhz."

What does that mean... I mean the manual says it supports up to 333Mhz, why does the website says 266Mhz?

Mobo:
PC333 Systemboard SocketA M848 series
has a Socket-462 processor socket for the AMD K7 type of processors. 333 fsb.

BIOS:
Amibios simple setup utility version 1.21.12

CPU:
1) CPU Frequency: 100mhz, 133mhz, or 166mhz
2) CPU Overlock Frequency: if #1 is 100, then it ranges from 100, 133, and 166mhz. If #1 is 133, then it ranges from 133 and 166mhz. If #1 is 166, it only ranges 166mhz. If I choose #1 and #2 to be 166mhz, the system locks up (have to reset the BIOS using jumper change).

3) CPU/DRAM Frequency Ratio:
This one has many options, from [1:1] all the way to [6:5].
With 1:1, DRAM freq is 133mhz. I use 1:1. I don't know what this is, can you explain?

4) CPU Type: AMD K7
5) CPU Ratio: Locked

I also note there are 3 temperatures: VCore, System, and CPU. What are these and what's the normal temperature for each/all?

Thanks !

Sounds like you might have been cursed with the marketing as I was. The northbridge specs say "Supporting AMD Athlon XP FSB 266 MHz." Note that there are two different XP 2600's out there, one that runs with a 333MHz FSB (12.5x multiplier) and another that runs at 266MHz FSB (15.5x). I have a KT333 motherboard which supports DDR 333 RAM timings (can use DDR 2700) but only supports a 266MHz FSB. So, with no overclocking at all, I'm running my XP 2600 (12.5 x 166 = 2075 MHz) but it's being recognized as a XP 2000 (12.5 x 133 = 1662.5 MHz). All my initial efforts to make the system run up towards 166 caused massive instability (understandably) since the system was only specced to run at 133.

And as to unlocking the multiplier, only four bits are available for setting the multiplier, and they top out at 12.5x. There's another range available, but it involes breaking a connection between two pins (not shorting one) and since that connection is internal to the chip, I gave up. I've found that my 1662.5 MHz has been plenty for everything I do. Sure, that compile of KDE could have gone quicker, but if I'm talking about 30 minutes versus 38, what do I really care?

Note: Sorry if I've been flipping DDR and SDR clock speeds around, I forget where each is supposed to be used.

Just load optimised default in the bios. And then save and restart to see if it works.

Have you tried updating the bios?

Try this link also as i had a similar prob.: http://www.nforcershq.com/forum/vie...8842&highlight=