Upgrading my primary rigs' PSU and GPU! Wish me luck on this endeavor!

[Busta Bloodnut]

Got this, https://www.ebay.com/itm/134146959388, beastly 780w adapter for my Alienware m18x r2. Anyone here have any experience with this adapter for this machine? Or any machines from this generation? Luckily, for me I found a slightly cheaper one that wasn't being sold from Canada with those insane shipping and import fees...BUUUT i did have to buy the Alienware cord from that seller in the link since the adapter i bought came with a Clevo one :( . 67$ and 55$ shipping and import fee respectively (OOUUCH lol). I actually spent more on that wire than the box itself lol. Also upgrading my GPU from a Quadro P5000 to an RTX 3080 from X-Vsion. And...oh man...I gotta tell y'all....that was the most bizarre purchase experience to say the least lol. Also had to buy the custom heatsink and X-bracket since it doesnt come with a bracket. Seller who sold me the adapter said he got one from that seller from the link and it got lost in customs for a month and half and just bought another one and then got the delayed one a week after buying the other adapter lol. Man, I hope that doesn't happen with my cord lol. Anyway, posting this to give updates during this process and MAY come into road blocks so I might ask you wizards here for help if needed. Wish me luck y'all!

[Durabat]

Looking forward to hearing how it goes. I took got the RTX 3080 from them and yes, weird purchase process but I did it through PayPal. Got my heatsink off ebay and it actually went very smoothly. Quick modded driver and it's been running for months with not a single issue yet. I wish the 4080 and 4090 weren't so expensive, I have more M18x's laying around aswell as a M17x R4 with 120hz screen waiting for a gpu upgrade. I can't justify the cost for them right now though.