What is the differences between Rank 1 & Rank 2 RAM. I need specs. I know what it looks like. I have 1- Rank 2 1GB 4200 U 533. They sent me 2 modules has a BSOD 0x00000007. this needs replaced. They want to send me 4 512 4200 U 533 Rank 1. I am fighting to have them send me 1 to match the one I have.

This company wants me to prove to them that there is a deference. They are saying that I need to take what they are giving me because it is the same as having 2GB of Rank 2 only this would be 4 stick instead of 2

RANK-1 is single sided RAM, RANK-2 is double sided RAM. They're offering you 4 x 512MB/rank-1 (total of 4 ranks), to replace your 2 x 1GB/rank-2 (total of 4 ranks). The only problem I foresee is that you'll use up all memory slots. Stay on them though...if you had 2 x 1GB, that's what you should get!

I completely understand what the visual differance is regarding the Rank 1 and Rank2. However there are functionsl differance as will and I need a quality souce for exact specs. I will not let them get away with this. I have many reason why which I don't feel need to be posted./

... and we appreciate you not sharing them (there's such a thing as too much information, after all) Science is built up with facts, as a house is with stones. But a collection of facts is not more a science than a heap of stones is a home

"I completely understand what the visual differance is regarding the Rank 1 and Rank2. However there are functionsl differance as will" Fine, when you find these "functionsl differance(s)", I'd love to read about them, because as far as I know, there are none.

First of all, you should note that there's a difference in price. Just check prices for memory, and you'll see that the higher density ram costs more. If you settle for what the company wants to give you, then you'll be losing money. The company is only looking at quantity and not quality. Second, some motherboards only have 2 or 3 memory slots (ie: micro ATX mobos). Maybe pretend that you don't have 4 slots? Also memory slots do go bad sometimes. One of mine went bad. If I had 4 memory modules, then I would have been screwed. For performance reasons, it's better to go with lower density ram if possible (in dual-channel configuration, it might not make a difference). That's because the computer uses the first ram chip until it's full, then it uses the 2nd. If you had lower-density ram, the first one would fill up quicker, so your computer would be using the 1st and 2nd ram at the same time. Thus, you wouldn't have to wait for each previous memory operation to complete. (It's been a couple of years since I had my operating systems class, but that's the gist of what I remember). You should get what you paid for. If they don't make it anymore, and want to settle for something cheaper, then you should get some sort of compensation. I'm sure if you wanted lower-density ram, you would have bought it. Graphic-intensive programs need alot of ram, so perhaps you were leaving two memory slots open for future upgradeability.