What you bought are refurbished/recycled RAM chips by obscure Chinese OEM.
The Samsung sticker is fake, along with the claimed part number, which happens to be included in the QVL of memory for P5Q, likely to mislead people into buying it.
If you read the marking on the black chips of your RAM, you will find "SEC XXX HCE6", with chips having different XXX values. On genuine Samsung it should be the same value, eg. 816, which corresponds to the 0816 as shown on the sticker, to indicate it is manufactured in the 16th week of year 2008. Also, HCE6 means it's rated as DDR2-667, so it is falsely advertised as DDR2-800.
This RAM is advertised as AMD-only for a reason: it is of 2Rx4. Consumer motherboard with Intel chipset only support 1Rx8/2Rx8/1Rx16.
If this is hard to understand and believe, think this way: if you are the seller, would you slander your products capable of supporting multiple platforms (in this case, AMD & Intel) as AMD-only and sell at a lower price?