To: Nemer who wrote (15066 ) 1/19/2001 2:11:01 PM From: mr.mark Read Replies (1) | Respond to of 110652 hey nemer my email client is netscape messenger. i don't know anything to speak of about outlook, and at the risk of sounding too harsh, given outlook's propensity for propagating viruses, i don't care to learn. there are many others here, however, who use outlook and probably don't share my dislike for it, so i hope you get some suggestions! <g> regarding memory...."will 133 work in a machine along side 100 installed TOGETHER ? will 133 work in a machine that uses 100 but with NO 100 installed, just the 133?" good questions. let's look at what crucial.com says on that subject.... ******************************** "Description: Can I use a 128MB PC100 SDRAM DIMM with a 128MB PC133 SDRAM DIMM? Solution: Generally you can mix PC100 and PC133 memory in the same system. The faster memory will run at the slower memory's speed (in this case PC100). However, there are some systems that will not correctly run this memory configuration. It is rare, but we suggest you contact your computer manufacturer or motherboard manual for specifics."support.crucial.com ********************************* .... and here's more on the subject, this being a little closer to your question.... ********************************* Description: Should I buy a PC100 module or a PC133 module? Solution: If your PC has a 100MHz front side bus (FSB), you will need PC100 or PC133 SDRAM. All PCs that accept PC100 SDRAM will also accept PC133 SDRAM; however, your memory will only run as fast as the slowest "link" in your system. If you have a 100MHz FSB or any PC100 modules installed, any PC133 modules that you install will only operate at 100MHz. PC133 SDRAM doesn't offer any immediate benefit over PC100 SDRAM if you have a 100MHz FSB. However, if you are planning to upgrade to a system with a 133MHz FSB in the future, you may be able to use the PC133 modules you purchase now in your future system."support.crucial.com ********************************* .... so it looks like the answer is that you can probably do it with no problems, but that you should make sure for those rare instances when you can't. while we're on the mem subject, let me point out one other area you should be cognizant of. forgive me if you already have this covered, in which case it may help someone else....Can you mix and match parity and non-parity modules? support.crucial.com How do I know if I need parity, non-parity, or ECC memory? support.crucial.com hope this helps. good luck! :) mark