good or bad Memory PC-133?

[Mecheater]

I need some help, I have an Athlon with an ABIT KA7 Motherboard. I bought a generic 64 MB ram stick of PC 133 when I first setup the computer. I am looking into buying a stick of 128 right now, and found some good brands at good prices that they guarantee will work with the Athlon. My stick right now is working and can only work at 100mhz. If I buy a stick of ram should I buy a stick that is a 133 and have it work at 100, or should I buy a good stick and have only 128MB @ 133mhz. If I'm correct I don't think the ram speed could mix properly.

so the scenario is
172MB running at 100mhz.
or
128MB running at 133mhz or higher if possible.

Which would be better?

also if anybody can help me, I'm looking at purchasing Kingmax 128MB PC150 Tiny BGA DRAM 168-Pin DIMM, I do know about Mircron and all those other top notch companies, but I'm not looking to use that right now. I already have those in other computers now.

Sorry if this post isn't in the right section, I don't post much and figured this section and you guys would probably help me the best.

Thanks

 

[compuwiz1]

PC133 is backward compatible, but your ram will never be able to run faster than it's slowest module. As far as mixing them, that's fine. If you have pc100 that will only go 112MHz, as example, installing extra pc133 will not get you over 112MHz in that combo, but may go higher alone. I'd still get the PC133 as it is the future, then if you upgrade from there, you buy another stick of pc133 and retire the pc100.

 

[Mecheater]

Just to ask, would it be better to give up the 64 MB stick @100mhz and just have 128 MB of ram running @ 133mhz or higher?

 

[compuwiz1]

Not really, more memory is still better. All depends on what you run and how much of your ram is utilized. There is not a huge performance increase in 100-133MHz ram....most people would never notice. I do notice not having enough ram.