New PC supposed to be AMD 2600+ coming up as 2000+

chabsey

Title says it all really. Have just got a new PC, supposedly an AMD 2600+ but within windows it says it's an AMD 2000+ running at 1.5ghz.

Now I know an Athlon will always have a lower clock than the advertised number (2000, 2200 etc etc) but within windows I get the following readout, AMD 2000+ running at 1.5ghz. Shouldn't a 2600+ be running at at least 2ghz?

The BIOS says that the FSB speed is 133 and is determined by the jumpers which I've not touched. Does this sound like something I can change easily or have I been sold a 2000+ masquerading as a 2600+?

Thanks.

lynchie

download cpuid and see what it says

Inspector Gadget

Did you build this yourself or buy it?

If you built it (or you bought it from a person that built it, rather than a boxshifter-type-place), I think you should have a look at your FSB. Although there are two different 2600+ CPUS (Thoroughbred "B", 2.16GHz and Barton, 2.083GHz, if memory serves), both (AFAIK) use a 166 MHz FSB...

Gadget.

Redrocket

make sure your fsb is running at the proper frequency. as inspector said, there's two different models of that chip so your fsb should be set to 133mhz thoroghbread or 166mhz barton. on some boards you have to move a jumper switch on the board to get the fsb running at faster speed

Azza

An Athlon XP 2000 does not run at 1.5ghz its clock speed is 1.67ghz.

Download CPU-z and found out the l2 cache speed and clock speed. See what is says.

chabsey

Thanks. I'll download those CPU ID programs and see what they say.

chabsey

Here's what CPUID says before I've touched the FSB. Would this tell me the real speed of my CPU without me having to change the FSB? In other words, do I definitely have a 2000+ or would messing with the FSB alter CPUIDs output?

whosurpaddy

most AMDs come underclocked if you build em yourswelf afaik, and this makes windows read em wrong. just up the fsb

Inspector Gadget

Okay, that CPU you've got is a Barton/Thorton (identified by the family code of 6/A(10)/* - and the 11.5 multiplier means that it's indeed a 2600+. The 2600+ is meant to run on a 333FSB (166x2 - the bus is "double-pumped" like DDR memory, where two bits are sent per clock cycle - actual speed is 166MHz), whereas your motherboard is running at 266FSB (133x2), meaning that the overall clock speed the thing is hitting is about 25% short of the mark.

Go into your BIOS, change jumpers if you have to, to set the FSB to 166, and you'll have a nice 2600+ Barton all of a sudden... (assuming the board knows about the Barton/Thorton chips - otherwise, it may think it's slightly lower, either way, it should be running at around 1.917GHz when correctly clocked.

Hope this helps,
Gadget

leeroybrown

Do as Inspector Gadget says. Quite a few people doing a first time build will get a surprise like this as the BIOS automatically sets the CPU to lower settings the first time it boots. This mechanism is to protect your CPU from bring fried by wrong values.

naitkris

looking at the CPUID screenshot i can easily tell you that the processor is faster than a Athlon XP 2200+, the very fact that the 2000+ and 2200+ have 256kb L2 and not 512kb as with the faster Athlon XPs should point in the direction of a 2600+ CPU

chabsey

Upped it to 166 and it's now a 2600+.

Thanks to all concerned.