Looking at a used EliteBook 8770w - question

[IlChengis]

Hello everyone,

I am considering buying a used EliteBook 8770w locally for personal use. Based on my initial research, looks like this model came with two motherboard options, one for Dual Core and the other for Quad Core processors. Based on that notion, I am only interested in this unit if I have the option to max it out to the highest specs that the 8770w line can take.

The laptop comes with an i7-3520M, which according to this it's a Dual Core processor.

I am confused, because I read somewhere that you can only upgrade to a faster Quad Core CPU if the unit came with a Quad Core from factory. Also, on another site I read that the Quad Core mobo comes with four SODIMM slots (I only see two in the picture below, perhaps they are stacked).

So my question is: do I need the laptop to come with a Quad Core CPU from factory in order to be able to upgrade it to the max Quad Core the 8770w line supports, or as long as it's an i7 I'm good, even if it's a Dual Core i7?

Based on the blurry pics and specs that the seller provided (see below), is this a good candidate? Any additional information, words of caution or advice in general will be welcome and appreciated. Thanks in advance!

For some reason I was unable to attach pics directly to the post, so here are some links:
i.imgur.com/1wjnUaU.jpg

i.imgur.com/n3HAzd9.jpg

i.imgur.com/UVbCrrZ.jpg

PS: last but not least, I see this link posted a lot on this Forum, but the server seems down for me. Does anyone have a mirror to offer? Would love to be able to download the manual: http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c03429986/c03429986.pdf

[IlChengis]

Bump. Anyone? TIA!