Well, that is one answer!
I've pretty much been installing "standard" PC133 or the DDR equivelents, depending on the computer, for 4 years now without regard to any special guides like that Crucial memory finder. Things have been fine so far. Usually I had locally built PC clones at my office and as long as I got SDRAM that was compatable with the FSB for the motherboard, things were great. I'd usually buy PC133 memory for the SDR motherboards and wouldn't have to worry if they were 66, 100 or 133 FSB. Same with the computers I built from scratch (about 30 of 'em) based on similar platforms with Tualatin processor and socket 370 motherboards (ASUS and Biostar). I've built a few systems based on the Pentium 4 platform and DDR memory, and purchased a few batches of Gateway computers running P4's too (ASUS motherbaords). I was able to use Kingston DDR memory (purchased PC2700 in that case) and it has worked flawlessly too.
So anyway, my experience has been limited to mostly the above, plus a few other "branded" computers including a few Dells, some older Gateway's and some Emachines. In every case, at our office, my boss and I were able to simply buy something like Kingston SDR or DDR memory and pop it in.
I noticed that the memory on listed on the Crucial site for the Dell Dimension 8400 was extremely expensive. Is this just a case of overcharging people because they think they have to have this memory and pay through the nose, or is there some way that DELL has "crippled" their computers to make them only work with memory spec'd a certain way?
We had a bunch of Servers and memory was always WAY more expensive for them and we usually bought it from Compaq or HP depending on the server. I can understand that "mission critical" servers may have special memory needs, but home computers? What IS the deal here?
Oh... that Crucial website stated that the memory for the Dell Dimension 8400 has to be installed in pairs. I thought that went out with 72 pin SIMMs with the exception of the RAMBUS RIMM debacle? I thought SDR and DDR SDRAM could go in singley and work fine. That is how I have it isntalled in my Epox 8RDA+. I am aware of the dual channel thing which gains you a small fraction of performance when you have matched pairs, but it isn't necessary and from what I have read, only gains much advantage for systems with onboard video sharing the system memory. Is this the case with the Dell Dimension line and DDR2 memory? They are just saying it should be installed in pairs (because of optimal performance) but it really isn't absolutely necessary like the old SIMM and RAMBUS days?