RAM install problem, can someone confirm I'm doing this right? (iMac)

[buccsmf1]

I have an 07 2Ghz 20 inch intel iMac.

I ordered http://www.newegg.com/Product/Product.aspx?Item=N82E16820134671

but when I installed it the computer booted (i heard the fans start up) but the screen stayed black. When i put the original ram back in everything went back to normal. Is the RAM defective? Did I order the wrong type? Do I need to do something else?

Thanks for your help

 

[spinnerlys]

It is the wrong RAM.
You need 667MHz DDR2, but you have 800MHz DDR2 RAM.

Look here for the correct RAM:
http://eshop.macsales.com/shop/apple/memory/iMac/Intel_Core_2_Duo

 

[fhall1]

Actually underclocking higher speed RAM should theoretically work, as long as the other parameters are equal. It's when you try to overclock slow RAM that you run into problems.