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.do i need PC133 RAM to run a P3 933 EB ? if so why ?

Pentium III 933 is locked at a multiplier of 7 as it is not unlockable such as AMD's processors using a pencil or conductive pen trick. Unfortunately, the only way to get this processor to run at 933mhz is to set the fsb at 133 mhz which means that the RAM will also be clocked at 133mhz because it runs off of your fsb (front side bus). If you have PC100 ram which is cas2 (such as corsair), you may be able to get your ram to run cas3-3-3 at 133mhz but if you don't have cas2 pc100 ram, good luck. If you don't run your fsb at 133mhz you can still use your PC at 100mhz fsb (as long as you have a nice configureable bios such as the Asus CUSL2 motherboard), the only thing is that since your multiplier is locked at 7, you'll effectively have a 700mhz Pentium III.

The best way to do this though is to have PC133 ram in the first place. You can buy it very cheaply right now as memory prices are low. You can pick up 128 megs for about $75-80 for GOOD cas2 PC133 memory such as Crucial or check the for sale forum for some Mosel Vitelic which will actually run cas2 at 143 fsb and give you even more performance.

If you're still set on using PC100 ram, start out with 110 fsb and if it boots (try using cas 3-3-3 settings in your BIOS at this fsb) then you can continue to increase your fsb speed until your PC no longer boots up. Then kick it back to the last speed that booted successfully and that's your max until you replace the ram.

Hope that helps.

Good luck to you. Any more questions, feel free to ask.

divinemartyr
 
The 933EB runs on the 133MHz fsb, so unless you are running it on a motherboard with the ability to run the ram lower than 133MHz, you are probably "buggered". You might get lucky and have some ram that will run at that speed, but I doubt it. Fortunately, PC133 is cheap now.
 
yes compuwiz i can change the fsb speed to 100 or 133
but i set it to suto on the motherboard and i have pc100 ram.

so what should io do ?

thankyou
 
yes compuwiz i can change the fsb speed to 100 or 133
but i set it to auto on the motherboard and i have pc100 ram.

so what should io do ?

thankyou
 
ummm, I understand that, but there are some VIA and 815 boards out that will allow you to run the fsb and speed of the ram Asynchronously. This way you can run the fsb at 133, while running the ram at 100MHz.
What kind of motherboard do you have?
 
Put back your old CPU and see if every thing work ok.

If Yes. ? Look at the slotket and set it to 100MHz, if the slotket has a setting for Celeron and PIII (or any other setting like FCPGA, Coppermine), set it to the "non Celeron" setting..

Take out the Old CPU and put in the slotket, if it does not work it is either the SlotKet or the CPU.

Get to a store, and buy a new Slotket make sure that this soltket is FCPGA compatible. Slotket in the US are about $10-15 (probably a little more in the UK.)

If the New Slotket does not work then it is a faulty CPU.
 
I cannot say that I saw all the slotkets in the world, but most of the old PGA slotkets did not have CPU setting.

All the new Slotkets (and I saw at least 6 different brands), have a choice between Celeron, and PIII.

So, get a new Slotket.

 
They were. Though I believe only the Intel boards were actually taken back and replaced with RDRAM boards.
 
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