Depending on your mtrbd. it will be compatible. I mention mtrbd. as only in rare cases it causes a problem. You can visit memory online retailers for yet another source of ram of the original type, but the DDR2-677 will work as 533 as the best it can do. You can try Craigslist and eBay as well for vendors if you like, but checking: http://www.crucial.com has provided good advice and being a retailer good ram to choose from.
I have Intel D102GGC2 Motherboard with 2 DDR2 533Mhz Memory slot. I already have 1GB DDR2 533 placed on my board. Now i would like to upgrade additional 1GB on my second slot. I enquired hardware shop and found DDR2 533 1GB no more available now. They offering to buy 1GB 677MHz DDR2 RAM. Can i buy this? can i have two memory module with different speed? I read motherboard manual and it support 533MHZ bus speed.
Please suggest me