AMD Athlon XP 1900+ only running at 1.2 GHz, mislabeled?

[dlev]

Have an AMD cpu. ID label states:
AMD Athlon
AX1900DMT3C
AGOGA 0203SPCW
Y7586830963
1999 AMD
This means it should be an AMD Athlon XP 1900+, correct? Pulled it out of an old computer to upgrade a SOYO K7VTA-Pro from an AMD Duron DHD1000AMT1B. Even when changing BIOS to 133 FSB the cpu will only run at 1.2 GHz. CPU-Z ID's the cpu as an AMD Athlon MP and also indicates FSB of 100 MHz with a multiplier of 12 (which is correct). Why can't I get the FSB to 133 MHz? Did someone stick an XP 1900+ label on an MP cpu?
Thanks

[CPUShack]

Try updating the BIOS?

It should as you know be 12x133 = 1600MHz

An old BIOS may mis-identify the CPU

[Fred Jodry]

In addition to what`s posted above, does your Soyo MB
adjust FSB with a jumper or jumpers? Also see if possible
if putting in identical pairs of memory sticks and enabling
interleaving is possible. (The bios might say "auto" or not
show it, then you`d see the MB compute really fast if so.)

[dlev]

Thank you both. I have now updated the bios per SOYO website, didn't correct the problem. Also, there are jumpers on the MB. SOYO's FAQ states they should be changed for 100 MHz v 133 MHz but the manual that was on my install CD states that was no longer necessary for the version I purchased. I tried it anyway. Would not boot and got audible message stating that processor was "damaged or incorrectly installed". Also, I misstated in my original post that I set the FSB to 133 in the BIOS, it was the DRAM that I set (I'm learning). In the CPU clock/freq setting area I was able to adj upward incrementally to a FSB of about 113 (~1356 MHz) but system was unstable. I also incr'd the voltage upward as I went up with the clock speed, but was still freezing/rebooting, so I brought it back down to the "default" setting. Also, it appears that interleaving is possible. I currently have 2 X 256 MB PC133. I've got 3 X 512 MB PC133 on the way to install (board allows 1.5 GB (3x512MB)). Would amount of SDRAM have any effect?
Thanks again.

[Fred Jodry]

The previous post is identical to this one except that a web script mistake of posted by "Guest" instead of "Fred Jodry", is corrected as I try. Cross your fingers, hold your breath.
Dave, one possibility is that you have you have a (frequency- ) weak motherboard. Obviously, the first step is to set all CPU, FSB, and (free- ) memory settings in the bios to 100 MHz, then set the jumpers to 100MHz and reboot the machine one time to save the bios settings in particular. At this point the machine will be working perfectly but basically 100 MHz bus and the CPU multiplier running somewhere in it`s native 1300- 1700 MHz core frequency (13- 17 X multiplier) area. Now a couple of minor steps before the biggies.
1. Make sure the CPU is sanely seated on the throne. In other words, is the CPU silicone + zinc oxide grease fresh? You`re not using a Pentium 3 fins outfit as an Athlon fins outfit and overheating things? Use regular CPU core, and memory voltages.
2. The two 256 MB times 133 MHz sdrams you`re using if matched and if aren`t (rare at this size of Megabytes) high density memory, should be good for keeping in. Since you seemed to mention that there are 3 memory sdram slots, usually it`s best to fill in the 2 ones farthest from the CPU with the matched memorys and leave the one closest to the CPU empty. The reason why is because you`re about to turn on interleave, something you usually can`t do with 1 or 3 memory sticks. Run a little check in case I`m wrong but most of the time this is how it works.
3. Try interchanging the two matched memory sticks with each other or borrowing a pair of 133 (, 140, 150) Mhz CL2 ("222") or "7E" or similar premium memory sticks for a test.
4. Go back into the bios. In order to turn on interleave, you must turn off spread spectrum otherwise the combination of the two will (always) shuffle your data into scrambled eggs, and it is sometimes necessary to set the free- memory speed to the same speed as the CPU`s. At this point, I`d suggest that you`d have external jumpers as well as bios CPU and Free memory speeds at the same 100 MHz, working, or 133 MHz, working, if by now I`ve given you enough steps to push the operations up to 133 MHz. Of course it helps if the CPU`s multiplier, whether native or set by jumpers is not excessive. By now, if you`re running 100 MHz FSB (etc)
times two (interleaving), you`re running the memory at 200 MHz which isn`t bad, or 266 MHz, which isn`t, isn`t bad. Remember that you`re also running the math co- processor at this speed which helps.
5. Occasionally this means that you`ve got successful adjustments of 100 MHz CPU and (higher or- ) 133 MHz free- memory, but this good difference is not too common on interleave. I usually wouldn`t be using odd frequencies like 113 MHz without a reason, for one thing, it`s not mentioned as one of the frequencies on the external jumpers. Remember that manuals, manuals on CDs, or printing on the motherboard is sometimes plainly incorrect. Caveat Emptor, and what if the motherboard is different or better than what`s stated? - :)
5. It`s possible that your hard drive or it`s adjustments or ribbon cables are the source of the scrambled eggs. You might borrow other hard drives for the test, just don`t thoughtlessly return them whammied with a crashed (or not crashed) Windows XP or Fedora installation on them instead of DOS installing- out the partitions problem.
6. By the way, Ha- Hah. Upgrading the bios usually doesn`t do good. Try "everything else" first. I hope the bios upgrade didn`t notch out your favorite operating system or hardware.
7. The 512 MB each sdrams you are planning to buy are Skip- Mems (my name for them). They are (always) high density memory, the same as single sided 8- chip 256 MB sdrams. High density is when you ask 512 passengers to get in and out, on, off, of a single door passenger car on the train at each station, not good. Since you can`t increase the number of doors, you`re using sdram, stick to 256 MB low density high quality ram instead of sawing the speed of your motherboard into about half.
8. My experience, and I`m responsible for the words I say, is that plainly about half of the "Edge" brand memorys as well as most, of the StarMicro memorys I run across, are Skip Mems. Caveat Emptor, this time with a frown.
9. Dave, I`m having wonderful results with my "A7V133" motherboard. It can haul 4 (or more) hard drives at 100 MHz (normally no other speed) on the cables. It also handles Durons, Athlons, and Athlon XPs as though they practically are each other. It`s quite picky on memory quality and doesn`t post interleave as 200 or 266 MHz if working, but is totally worthwhile. It`s also completely a "Pro" board, meaning, it uses plug- in video and sound.
The previous post was,
Thank you both. I have now updated the bios per SOYO website, didn't correct the problem. Also, there are jumpers on the MB. SOYO's FAQ states they should be changed for 100 MHz v 133 MHz but the manual that was on my install CD states that was no longer necessary for the version I purchased. I tried it anyway. Would not boot and got audible message stating that processor was "damaged or incorrectly installed". Also, I misstated in my original post that I set the FSB to 133 in the BIOS, it was the DRAM that I set (I'm learning). In the CPU clock/freq setting area I was able to adj upward incrementally to a FSB of about 113 (~1356 MHz) but system was unstable. I also incr'd the voltage upward as I went up with the clock speed, but was still freezing/rebooting, so I brought it back down to the "default" setting. Also, it appears that interleaving is possible. I currently have 2 X 256 MB PC133. I've got 3 X 512 MB PC133 on the way to install (board allows 1.5 GB (3x512MB)). Would amount of SDRAM have any effect?
Thanks again.
_________________
Dave Leverett

[Fred Jodry]

Last night I discovered my A7V133 mainboard doesn`t know
what Athlon XP CPUs are, showing the wrong multiplier like
the title example, top, but it runs regular Athlons and Durons
with all the bells and whistles I jumper in, while a little red
MSI MB with the letters, XP next to the socket ran interleave
for the first time, showing an XP 2200+ as a 2200+ when the
CPU memory bus and free memory bus were set the same.