A Number of Questions

Hello all, I'm pretty close to purchasing a PC from here but i have a few reservations. first off however this is the build i have come up with.

Configuration Code: 1888738
Total Price with Instant Savings: $2,903

Specifications:
Chassis Model: Digital Storm VANQUISH 7 <br><strong></strong>
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i7-7820X (8-Core) 3.60GHz
Motherboard: MSI X299 SLI PLUS (Intel X299 Chipset) (Up to 3x PCI-E Devices)
System Memory: 16GB DDR4 3000MHz Digital Storm Performance Series
Power Supply: 600W Digital Storm Performance Series (Supports up to an NVIDIA GTX 1080 GPU)
Expansion Bay: - No Thanks
Optical Drive: - No Thanks
SSD / M.2: 1x SSD M.2 (500GB Digital Storm M.2 Performance Series)
HDD Set 1: 1x Storage (3TB Seagate / Toshiba)
HDD Set 2: - No Thanks
RAID Config: - No Thanks
RAID Card: - No Thanks
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Graphics Card(s): 1x GeForce GTX 1080 8GB (Performance Edition) (VR Ready)
Sound Card: Integrated Motherboard Audio
HPC Processor: - No Thanks
Extreme Cooling: H20: Stage 2: Digital Storm Vortex 240mm Liquid CPU Cooler (Fully Sealed + No Maintenance)
HydroLux Tubing Style: - Not Applicable, I do not have a custom HydroLux liquid cooling system selected
HydroLux Fluid Color: - Not Applicable, I do not have a custom HydroLux liquid cooling system selected
Cable Management: Premium Cable Management (Strategically Routed & Organized for Airflow)
Chassis Fans: Standard Factory Chassis Fans
Internal Lighting: Remote Controlled Advanced LED Lighting System (Multiple RGB Color Modes)

This is in my price range and I think will meet my needs nicely however I want to be thorough and I have some questions about this PC's capability as my knowledge is limited. This is my dream computer and its going to be made into my dream gaming/streaming/recording setup. that setup includes three monitors two 1080p ones and perhaps a 4k. Would this compute be able to handle that? and by handle it I mean run intensive games on the 4k while streaming? (I don't have any desire to stream or record in 4k I just want a monitor that I can see in 4k) If this setup would not be able to run that then could it run three 1080p monitors, I know it has the ports but I worry about the rigs ability to actually run everything.
My other question is this. I have a EVGA 750B power supply from a previous computer I owned. I Know I dont want to skimp on that but is 750 watts enough? And if so, would buying the computer with the cheaper 600 watt power supply and then swapping it out be a good idea to save me 60 bucks?

We don't recommend the 7th gen CPUs for gaming. With the 8700K Coffee Lake, you have 8th gen tech, 6 cores, 12 threads and a proc that turbos to 4.7 Ghz when needed.

Nvidia has not yet achieved the single card solution for gaming at 4k on the highest settings with all games. I don't know anything about pairing 4k gaming with streaming. It may be okay, may not, but the GPU is already working pretty hard on that 4k game. The CPU would not limit you. As for running 3 1080p monitors, I believe the GTX 1080 would be up to that use.

As for the used power supply, it's a fine idea as long as it doesn't have too many "miles" on it.

Here's my recommended rig: 1888791.

You save a little, but get better parts with longer warranties. I forgot the lighting, but I have it, I like it, and you can't beat free!

Hope I helped you.

The x299 platform has advantages over the Z370 for sure, like quad channel memory , more Pcie lanes for more than 2 video cards, etc but if this is strictly a gaming rig then the quad channel memory and added Pcie lanes won't matter.   Gaming also doesn't yet use more than 2-4 cores and primarily a single core is whats used.

The 8700k has a higher Turbo clock on first core.

For the price, Cretae gave you all the cpu and chipset needed for gaming, plus a better cpu cooler with longer warranty and same for the primary drive. 

Nothing wrong with your build, but if finances are tight then the second build gives you more for less in gaming.  If you do a lot of multitasking, editing and possible even heavy streaming then your build might be better with added cores, wider memory bandwidth, etc.

You did just mention video editing, rendering,recording, etc.  You might be better with the 7820x's more cores.threads and the wider memory. 

For 4K gaming at higher settings an sli setup is still needed, at least until the new generation arrives whenever Nvidia sees the marketing worth it.  I think a single card is always better than sli if you can get the gaming you want.  Otherwise, sli is needed for now.

I would use his suggestion on the M.2 and cpu cooler.

I'm glad we helped.

I hope bprat told you all you need to know about that other CPU platform. I'm strictly a gamer, so I don't know much about your other uses.

I can say that I have never been a fan of dual video cards, especially now. Video cards are selling at a ridiculous premium right now due to digital coin mining. My general objection is that you never get the power of a GPU X 2. There are always issues: lack of support by many programs and games that negates the whole concept, and that issue of getting only something like 35-60% from the second card for a variety of reasons. I'm hoping the next gen video cards will not only prove capable of driving 4k at the max, but also relieve some of the market shortage causing the price increases.

Yeah, the more research I've done the more I think I don't really need 4k game graphics just yet. I might purchase a 4k monitor anyway so I can view some photos I've taken in the resolution and watch TV and movies in it and such. But I don't need to be running any games higher than 1080p. Thank you!