Anyone knows how to read memory DRAM pricing?

http://www.dramexchange.com/

DDR2 512Mb 64Mx8 667MHz $3.50 (high) , $2.80 (low)

I understand that 512MB is not $3.50. I often see this number figure on magazine and website. Anyone can interpret for me what it means?

Sorry for this dumb question.

 

I think it the price variation or maybe some thing to do with stock of the companies they look at.

Also read the FAQ on the Dramexchange website.

 

It's not a dumb question, unless perhaps you're an engineer working in the memory industry.

It's talking about megaBITS, not megaBYTES - watch the capitalization. Therefore, if you divide by 8 you get megabytes... in this case 64 megabytes. The 64Mx8 denotes the organization of the chip itself - more of an engineering feature than anything else. In this case, it means 64 million storage elements, with 8 bits each.

Also, note that this isn't talking about DIMMs (memory modules), but rather the chips that are laid out on the DIMM itself. Typically a memory module will use between 8-18 of these chips, depending on the configuration the manufacturer wants.

Going by these prices, a 512MB DIMM would take up 8 of these chips, at a price of between $2.80 to $3.50 each - so the chips would make up about $22-$28 of the final cost of the DIMM for the manufacturer.

If you really want to get technical, then you could try reading this, but it's not for the faint of heart.