pc 100 to 133

[leichaolan]

I am currently running 160megs of pc 100 on an Athlon 750, Windows98se, and a TNT2 m64 32megs. How do I set my system to take pc 133 and work to it's best? I've checked my mainboard manual and it's not a jumper, I've gone through bios, and I can't find it there either. How do I get pc 133's to work?! What will happen if I stick em in without configuring them? Oh, and if I upgrade to pc 133 256 megs, will I notice a marked improvement in gaming? Finally, I found a FSB jumper setting on my mainboard. It has two settings 100/133mhz. It is on 100 by default. What is it for and what happens if I set it to 133? Thanks for reading this as I know it is long and full of questions most of you guys probably already know and answered many times.

[leichaolan]

Oh, and I forgot to mention that they're all running on a 1st mainboard AZ11 motherboard.

[bassvax]

Leave the CPU FSB at 100MHz since it is actually running at 200MHz. The memory can be set to 133MHz via the BIOS (keep looking), but if you are using 100MHz memory you may be stuck with just that. Some 100MHz memory will handle the "overclocking" some won't. You will see a modest increase in speed with the 133MHz memory setting. Here (http://www.fica.com/products/motherboard/Socket462/AZ11.stm) is a link to the specs of your mobo...if they offer a manual download I'd suggest looking at it since it is possible they have made a revision to it. It should tell you how to adjust the memory bus as well.

If you are adventurous you can change the FSB of the mobo to 133MHz but be advised you may encounter boot problems related to heat or just the fact that it won't handle the setting.

133 RAM upgrade is cheap and can be used for future upgrades http://www.PCGuide.com/ubb/smile.gif

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[ranchdog]

Hi leichaolan- The 100/133 jumper you found on the Mboard is for FSB speed and CPU clock speed. It is not for memory settings. The 750 chip you are using has a factory default setting of 200MHz with a multiplier of 7.5x100. The jumper sets the FSB at 100MHz so the system utilizes PC100 RAM. PC133 RAM can be used as it is backwards compatable and will function with the 100MHz setting. The 100MHz setting is doubled only when it reaches the CPU for a function of 200MHz. Confuseing ain't it? When AMD began to produce the CPU's that were 266 MHz Bus speed by default the Mboard Mfg's. began using the 100/133 jumper on thier boards. So that either style of chip could be used. Just remember these figures are doubled when they reach the CPU. In your case-- Using the jumper setting of 133 will give you a fail to boot. As I recall the AZII doesn't furnish a Soft Menu type program so bumping the FSB isn't available in that respect. (that's O/Cing) The VIA chipset can't handle more than 105-110 FSB speed outright and things begin to freeze. If you check the die itself on an AMD chip there will be three rows of letters/numbers. On the top row, the last letter will either be the letter B or C. B= 200 clock speed C=266 clock speed. So--- In summary to your entire question. You could save your bucks, purchase a 266 Bus speed CPU (perhaps a 1Gig), set your jumper to 133. Throw in some quality PC133 RAM and Drive On. Luck.

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......Indecision may or may not be my problem......

[This message has been edited by ranchdog (edited 08-04-2001).]

[leichaolan]

Thanks Ranchdog for your advise. I found out about that failed boot thing the hard way a few hours ago. I'm sure my mboard has pc133 support (says so in manual) but I still can't find settings on it. What if I scrap all of my pc100's and get a stick of 256 pc 133 and just plug it in without doing any sort of configuring. Will my motherboard recognize the pc133 and automatically run the memory bus at that speed? After I get the pc133 and plug em in, is there anyway to check through win98se or bios, etc. if the ram is running at 133? Thanks in advance.