Is my system DV7t-3300, or DV7t Quad Edition? And how to add more memory to it?

Dear forum,
I have an old notebook computer bought back in March 2010. It's a DV7t series. As it's getting slowly, I'm thinking of adding more memory. However, I'm not sure how much memory the motherboard can support for the upgrade.
I'm stuck with the first step, which is to decide the model number (and then motherboard) of it.
My original order email states the following:
YOUR CUSTOMIZED HP PC
dv7t quad edition
• Genuine Windows 7 Home Premium 64-bit
• Intel(R) Core(TM) i7-720QM Quad Core processor (1.6GHz, 6MB L3 Cache) with Turbo Boost up to 2.8 GHz
• FREE Upgrade to 4GB DDR3 System Memory (2 Dimm) from 3GB DDR3 System Memory (2 Dimm)
• 500GB 7200RPM SATA Hard Drive with HP ProtectSmart Hard Drive Protection
• 1GB Nvidia GeForce GT 320M - For i7-720QM and i7-820QM Processors
• 17.3" diagonal HD+ High-Definition HP LED BrightView Widescreen Display (1600 x 900)
• LightScribe SuperMulti 8X DVD+/-RW with Double Layer Support
• Webcam Only
• Intel Wireless-N Card with Bluetooth
• HP Integrated HDTV Hybrid Tuner
• HP Color Matching Keyboard
• 8 Cell Lithium Ion Battery
• No Modem
• Microsoft(R) Works 9.0
• HP Home & Home Office Store in-box envelope
However, the bottom of the notebook computer has a label that specifies the following:
Pavillion dv7
Serial: omitted
Product: WH764AV
Model: Q dv7t-3300.
I visited some memory buying website like 'crucial.com'. However, I was prompted to select the model and there were both dv7t-3300 CTO and dv7t Quad Edition. Unfortunately, they resulted in different kinds of memory (although the specs of the sugested memory modules seem to be the same, these two memory modules have different model numbers).
So, what model number my system has? 3300 CTO or Quad Edition?
Perhaps a suitable model number would tell me which motherboard this notebook has. Additionally, can anyone advice me about on how much memory my notebook can support (8GB or 16GB) maximum?
Thanks a lot!
Cruiser

Hi,
Max is 8Gb using the following manual:
http://h10032.www1.hp.com/ctg/Manual/c01859666.pdf
And from the following site:
https://www.ramcity.com.au/upgrade/hp-compaq/pavilion-dv7-series-notebook/dv7t-3300-cto/73893
The above manual shows you how to add/replace RAM. Looks like you have to buy 2 x 4Gb sticks.
Regards.
BH
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