Is CPUID always accurate?

[TitanDiddly]

I bought a 2100+ on another board a few months ago, and have been using it for a few months. I've noticed a few times that the BIOS reads it as a 1500+. I didn't really care, since it wasn't slowing me down much. I decided to do something about it last night. If I load the 'High Performance Defaults", it shows as a 2100+, but Windows crashes before or as soon as I log in. Today I ran CPUID, and it reads the chip as a 1500+. Is CPUID always right, even if the BIOS is misidentifying the chip? Did I get screwed, and actually have a 1500+?

 

[nick1985]

is the fsb set from 100 to 133?

 

[oldman420]

depending on the speed you post any amd cpu at it will give you the corresponding model number ie amd barton 11 x 166 = xp 2500+ 11 x 200 xp3200+ 12 x 166 xp 26 7 or 800+ they make em all the same at the factory and test em to see what speed the will run at and thats how they get different models within the same core family. the way to really tell is to remove the cpu and look at the steppinf the spped of the cpu is right after the first set of letters in the stepping code on the cpu die

 

[3chordcharlie]

it could be set to 100fsb - and high performance defaults might crash your machine due to ram/agp timings or some such thing - try going into the bios again, and just change the fsb from 100 to 133, then see if that is stable.

 

[TitanDiddly]

It is set at 100. High performance sets it to 133, among some other changes. I think.
I have 'meh' RAM and an 'OMGWTF' video card: 768mb of 2700, and a Radeon 7000 64MB DDR. Think the vid or RAM is holding my chip down?

 

[dmw16]

If it is @ 1500+ speeds when FSB=100 and the correct speeds when FSB=133 then you weren't sold the wrong chip. Odds are it is your RAM, although if it really is PC2700 then it shouldnt matter. If you can, try to track down a good piece of memory you can perhaps borrow from a friend. It probably isn't your video card unless there is some odd setting.

Here is my suggested solution. Set your BIOS to normal mode or whatever doesnt crash. Then go into it and manually change your FSB settings, but dont just do the fast bios setting. My guess is what when you change to the 'fast' bios setting it is cranking up your RAM timings or something and that could be causing the crash.

Good Luck.
-doug

 

[3chordcharlie]

so you really can't change just the fsb? because your ram is rated for 166fsb, and you should only need 133 to make it work. High performance defaults may have enabled some other settings that your ram can't handle - like if it can do 2.5-3-3-6 and 'high performance' selects 2-2-2-5 timings, you will either not boot, or get instability. You shouldn't have to pick 'high performance' to change your fsb though...

 

[TitanDiddly]

Originally posted by: dmw16
If it is @ 1500+ speeds when FSB=100 and the correct speeds when FSB=133 then you weren't sold the wrong chip. Odds are it is your RAM, although if it really is PC2700 then it shouldnt matter. If you can, try to track down a good piece of memory you can perhaps borrow from a friend. It probably isn't your video card unless there is some odd setting.

Here is my suggested solution. Set your BIOS to normal mode or whatever doesnt crash. Then go into it and manually change your FSB settings, but dont just do the fast bios setting. My guess is what when you change to the 'fast' bios setting it is cranking up your RAM timings or something and that could be causing the crash.

Good Luck.
-doug

I'll try that, thanks.

 

[MDE]

Make sure it's getting the proper voltage too.

 

[Darilus]

CPUID isn't always right, FYI. I have an 1800+ that I've checked the stepping on, so I'm sure, but now that it's OC'd CPUID shows it as an UNDERclocked 2600+. If you really want to be sure, use this link:
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to check what chip you have. Otherwise I'd agree, manually change your FSB settings and voltage instead of using the "fast" setting.

 

[TitanDiddly]

Just rebooted and changed to 133 from 100. I'm posting in this condition- I did notice some instability with Windows, music freezing and computer unresponsive. However, this issue went away when I removed a disc from the CD-ROM drive which was spooling up randomly. No problems now. AMDCPUID reads a 2100+. When I felt my HSF, it felt hotter than usual- but this turned out to be the placebo effect, as it is actually running 8C cooler than it was earlier today. I think that was the higher ambient temperature.