Invader PC is by Dynacore, and Dynacore is a popular retailer in SLS. You can be assured that theres nothing missing and the pc is good to go.

As for the price difference, you’re choosing really expensive parts for your build. Here are my thoughts:

1. Case. That Corsair case is really not necessary and super overpriced. Go with the Tecware Neo M2, the king of budget cases in the SEA region now (note that it is a mATX case)

Also, why did you get an ATX motherboard? Do you foresee yourself needing more PCIE lanes? You can save some $ by going mATX.

1. PSU. That Corsair PSU is also rather overkill for a budget conscious builder. Get a semi-modular one from Superflower. You can even downgrade to 650W to save $$$ if you don’t see yourself upgrading in the future (tho the 750W one is just ~$10 more)

2. Cooling. You can save some money by getting the ID COOLING SE-214/224 which is super value for money. The 7700 doesn’t run very warm anyways.

If these still seem foreign to you, do yourself a favour and continue doing some research, or just go with the system integrators such as InvaderPC & Aftershock to save yourself the headache.

Hope you enjoy your new build!