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Need PSU and case help for my first build!

I'm going to build my first pc very soon, so I've been studying up on the ins and outs of cable management and the like. 

The specs (or at least the ones that matter right here, anyways) are:
Motherboard: MSI B550 Gaming Edge Wifi

GPU: TUF 3080 OC (when I can get my hands on one)

Case: Phanteks P400A DRGB
PSU: Corsair RM850

After reading the manuals of the aforementioned parts, the only section I didn't really understand is the designation of the modular cables. (attached below)

I know that the 24-pin goes to the mobo power, but the rest is unclear to me.

  1. I know the CPU needs 8-pin, but which of the 8-pin cables? EPS/ATX12V?
  2. If so, I'm assuming the 2x8-pin connector needed for the GPU is the PCIe 8-pin 6+2?
  3. Lastly, my case (P400A DRGB) needs SATA power for the fan controller, is this SATA 3 or SATA 4?

435145742_Screenshot2020-10-26024518.jpg.21bd8479a9c7c224ade7f07afebf975d.jpg

I'm sorry if this post is too long or if I ramble too much. Any help would be appreciated! 

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What is your cpu?

CPUAMD Ryzen 9 3900X 3.8 GHz Motherboard: Gigabyte X570 AORUS PRO WIFI ATX RAMCorsair Vengeance LPX 32 GB (2 x 16 GB) 3200 CL16 GPUNVIDIA GeForce RTX 3070 8 GB Founders Edition CaseFractal Design Meshify C ATX Mid Tower SSDSamsung 970 Evo 1 TB M.2-2280 NVME Solid State Drive PSUCorsair RM (2019) 850 W 80+ Gold Certified Fully Modular ATX Monitors:  LG 27GL83A-B 144Hz 27 Inch Ultragear QHD IPS 1ms NVIDIA G-SYNC Compatible Gaming Monitor, Black, Dell 4k IPS U Series 27-Inch Screen LED-lit Monitor (U2718Q) Coolingbe quiet! Dark Rock Pro 4 50.5 CFM CPU Cooler

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The MB takes the 24 Pin ATX AND the 8 Pin EPS.

 

Yes you need to plug in BOTH.

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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1 minute ago, Daniel1 said:

What is your cpu?

ryzen 3700x, at least until 5000 series comes out

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1 minute ago, Ankerson said:

The MB takes the 24 Pin ATX AND the 8 Pin EPS.

If I understand correctly, is this how it works?
MB: 24 pin & 8 pin EPS
CPU: The other 8 pin EPS?

Or does the cpu just rely on the 8-pin already in the MB?

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2 minutes ago, lugs said:

If I understand correctly, is this how it works?
MB: 24 pin & 8 pin EPS
CPU: The other 8 pin EPS?

Or does the cpu just rely on the 8-pin already in the MB?

 

The 24 Pin is just the 24 pin.

 

The 8 Pin EPS is the CPU power.

 

You only have 2 power connections on the MB.

 

24 pin ATX and 8 Pin EPS.

 

And BOTH need to be plugged in.

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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1 minute ago, Ankerson said:

 

The 24 Pin is just the 24 pin.

 

The 8 Pin EPS is the CPU power.

Okay I understand. So that means the PCIe 6+2 cables are for the GPU? 

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Just now, lugs said:

Okay I understand. So that means the PCIe 6+2 cables are for the GPU? 

 

Right, exactly. 

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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14 minutes ago, lugs said:

If so, I'm assuming the 2x8-pin connector needed for the GPU is the PCIe 8-pin 6+2?

 

OH, and you need to use 2X separate PCIe cables for the GPU, not just one with 2 connectors.

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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Just now, Ankerson said:

 

OH, and you need to use 2X separate PCIe cables for the GPU, not one with 2 connectors.

So I take two (6+2) PCIe cables, clip the 6 and 2 together properly, then I can pop that into the GPU?

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15 minutes ago, lugs said:

Lastly, my case (P400A DRGB) needs SATA power for the fan controller, is this SATA 3 or SATA 4?

 

That's power from the PSU, not from the MB.

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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3 minutes ago, lugs said:

So I take two (6+2) PCIe cables, clip the 6 and 2 together properly, then I can pop that into the GPU?

 

6+2=8.

 

You PCIe cables are daisy chained, you will need to use 2 of those. One cable from the PSU end for each 8 Pin on the GPU.

 

Just tie down the extra 6+2 connections you aren't using.

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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5 minutes ago, Ankerson said:

 

That's power from the PSU, not from the MB.

Yes, I'm aware of that. It's just that the setup for the P400A fans to sync with my MB is confusing for me haha.

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11 minutes ago, Ankerson said:

 

6+2=8.

 

You PCIe cables are daisy chained, you will need to use 2 of those. One cable from the PSU end for each 8 Pin on the GPU.

 

Just tie down the extra 6+2 connections you aren't using.

Oh okay. Thanks man! You've helped a ton haha 

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4 minutes ago, lugs said:

Oh okay. Thanks man! You've helped a ton haha 

 

 

OK, have fun and take your time building it.

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. 

 

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

 

i7 8700K, AORUS Z370 Ultra Gaming, 16GB 16GB DDR4 3000, EVGA 1080Ti FTW3 Ultra, Samsung 960 EVO 250GB, Corsair HX 850W.

 

 

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