Close

Register Now!

To Get More Info and Daily Reward.

Please login or register.
Pages: [1]   Go Down

Author Topic: How many CPU PSU plugs to attach?  (Read 143 times)

0 Members and 1 Guest are viewing this topic.

programsTopic starter

  • PRIVATE E-2
  • **
  • Offline Offline
  • Posts: 3
How many CPU PSU plugs to attach?
« on: 11-January-19, 08:36:41 »

Hi, I just set up a new build with the following:

- MSI X299 CREATION motherboard
- Intel i9-9980XE processor
- 64Gb Corsair 3200 Mhz (4x16Gb) memory
- MSI Geforce RTX 2080 Gaming X Trio 8Gb graphics
- Seasonic Prime 1000W Titanium PSU

So, my problems are these...

1) The motherboard has 3 connectors for CPU power. My Seasonic PSU comes with only 2 CPU-PSU cables. Do I need to use all 3 connectors on the motherboard? Can I use only 1, maybe 2? Do I need to contact Seasonic for another CPU-PSU cable to use the computer? (I do not overclock.)

2) There is a 4-Pin PCIE_PWR1 connector below the PCI-E slots. Is this also a necessary power connection, or only for use with cards the draw a lot of current?

Please help… I don't want to damage this computer... Thanks, Tommy
Logged

badboy2k

  • Global Moderator
  • *****
  • Offline Offline
  • Posts: 8256
Re: How many CPU PSU plugs to attach?
« Reply #1 on: 11-January-19, 08:43:31 »

1: with that board you need to connect CPU-PWR_1 and CPU-PWR_2 and leave the 3rd empty

2: the 6 PIN PCIE_PWR1 is for if your using more then one graphics card to supply extra power to the PCI-E slots.
Logged
OS: Windows7 professional SP1 64bit (OEM)
Motherboard: MSI 790FX-GD70 (bios 1.17) AM3
Processor:AMD phenom IIx4 955 black edition 3.2GHz processor(Clock speed of 4GHz)
Cooler: corsair H100 cooler
Ram: 16GB Corsair Dominator DDR3 1600MHz ram (2 dual channel kits model: CMP8GX3M2A1600C9) (underclocked at 1333MHz)
GPU: 1: MSI R7870 -2GD5T/OC @ 1155mhz , 2: MSI R7850-Twin Frozer 2GD5/OC @ 925mhz
PSU: Thermaltake tougthpower 1500W (+12v1 20A, +12v2 20A, +12v3 40A, +12v4 40A) (+12v1=20+4 connector, +12v2=CPU power, +12v3=PCI_E connections, +12v4 = molex+sata+PCI_E connectors  )
Extras: 1 x 4 port raid card (model SIL3114) ASUS Xonar Essence STX sound card PCI-E X1.

programsTopic starter

  • PRIVATE E-2
  • **
  • Offline Offline
  • Posts: 3
Re: How many CPU PSU plugs to attach?
« Reply #2 on: 11-January-19, 11:25:39 »

Okay... What would I ever use the CPU-PSU #3 for?
Logged

badboy2k

  • Global Moderator
  • *****
  • Offline Offline
  • Posts: 8256
Re: How many CPU PSU plugs to attach?
« Reply #3 on: 11-January-19, 13:06:24 »

the 3rd is if your going to be trying to overclock the CPU alot. thats why it has a 3rd for extra power that is needed to push as much power to the CPU as them chips can pull upto 500w when overclocked!
Logged
OS: Windows7 professional SP1 64bit (OEM)
Motherboard: MSI 790FX-GD70 (bios 1.17) AM3
Processor:AMD phenom IIx4 955 black edition 3.2GHz processor(Clock speed of 4GHz)
Cooler: corsair H100 cooler
Ram: 16GB Corsair Dominator DDR3 1600MHz ram (2 dual channel kits model: CMP8GX3M2A1600C9) (underclocked at 1333MHz)
GPU: 1: MSI R7870 -2GD5T/OC @ 1155mhz , 2: MSI R7850-Twin Frozer 2GD5/OC @ 925mhz
PSU: Thermaltake tougthpower 1500W (+12v1 20A, +12v2 20A, +12v3 40A, +12v4 40A) (+12v1=20+4 connector, +12v2=CPU power, +12v3=PCI_E connections, +12v4 = molex+sata+PCI_E connectors  )
Extras: 1 x 4 port raid card (model SIL3114) ASUS Xonar Essence STX sound card PCI-E X1.

flobelix

  • MSIHQ Red Rockets Team Member
  • Global Moderator
  • *****
  • Offline Offline
  • Posts: 30355
  • 微星科技
    • Afterburner New Features Introduction | MSI
Re: How many CPU PSU plugs to attach?
« Reply #4 on: 11-January-19, 13:19:06 »

With an Intel i9-9980XE  I would seriously use the 3rd cpu power connector as well. Even if not overclocking.
Logged
MSI X299 Gaming M7 ACK (MS-7A90) Bios 1.9
Core i7 7820X @ 4203.84 MHz (42 * 100.09 MHz, fixed all cores), 1.086v
Corsair H110 Liquid CPU Cooler
32GB (4 x 8GB) Corsair CMK32GX4M4C3000C15R @ 1500 MHz (DDR4-3000), 15-17-17-35-2t 1.35v
MSI GeForce RTX 2080 GAMING X TRIO
256GB Samsung 830 SSD + 2TB Crucial MX500 SSD
Corsair HX1200i • +12V: 100A • +3.3V: 30A • +5V: 30A
Windows 10 Pro
Cooler Master Masterbox 5 MSI Edition

programsTopic starter

  • PRIVATE E-2
  • **
  • Offline Offline
  • Posts: 3
Re: How many CPU PSU plugs to attach?
« Reply #5 on: 13-January-19, 19:52:49 »

Would using only 2 poer connectors be why my system is unstable using XMP to get the full 3200 Mhz from my memory?
Logged

badboy2k

  • Global Moderator
  • *****
  • Offline Offline
  • Posts: 8256
Re: How many CPU PSU plugs to attach?
« Reply #6 on: 14-January-19, 08:48:40 »

above 2666Mhz is never Guaranteed as its classed as a overclock as its above what Intel has validated

 
 
 
Memory Specifications
 
 
Max Memory Size (dependent on memory type)   128 GB
Memory Types   DDR4-2666
Max # of Memory Channels   4
ECC Memory Supported   N

if you want to make 100% sure either get an adapter or a additional 8 pin CPU power line for your PSU but i doubt its the issue. i would suspect the Memory Controller in your CPU is just not capable of being stable at 3200MHZ
Logged
OS: Windows7 professional SP1 64bit (OEM)
Motherboard: MSI 790FX-GD70 (bios 1.17) AM3
Processor:AMD phenom IIx4 955 black edition 3.2GHz processor(Clock speed of 4GHz)
Cooler: corsair H100 cooler
Ram: 16GB Corsair Dominator DDR3 1600MHz ram (2 dual channel kits model: CMP8GX3M2A1600C9) (underclocked at 1333MHz)
GPU: 1: MSI R7870 -2GD5T/OC @ 1155mhz , 2: MSI R7850-Twin Frozer 2GD5/OC @ 925mhz
PSU: Thermaltake tougthpower 1500W (+12v1 20A, +12v2 20A, +12v3 40A, +12v4 40A) (+12v1=20+4 connector, +12v2=CPU power, +12v3=PCI_E connections, +12v4 = molex+sata+PCI_E connectors  )
Extras: 1 x 4 port raid card (model SIL3114) ASUS Xonar Essence STX sound card PCI-E X1.

flobelix

  • MSIHQ Red Rockets Team Member
  • Global Moderator
  • *****
  • Offline Offline
  • Posts: 30355
  • 微星科技
    • Afterburner New Features Introduction | MSI
Re: How many CPU PSU plugs to attach?
« Reply #7 on: 14-January-19, 11:10:20 »

As badboy said 3200 is not guaranteed to work anyway.

Still that would not only mean oc for the ram but the cpu (memory controller) as well. I stand by my statement to also use 3rd power connector for the ultimate cpu for this socket you have.
Logged
MSI X299 Gaming M7 ACK (MS-7A90) Bios 1.9
Core i7 7820X @ 4203.84 MHz (42 * 100.09 MHz, fixed all cores), 1.086v
Corsair H110 Liquid CPU Cooler
32GB (4 x 8GB) Corsair CMK32GX4M4C3000C15R @ 1500 MHz (DDR4-3000), 15-17-17-35-2t 1.35v
MSI GeForce RTX 2080 GAMING X TRIO
256GB Samsung 830 SSD + 2TB Crucial MX500 SSD
Corsair HX1200i • +12V: 100A • +3.3V: 30A • +5V: 30A
Windows 10 Pro
Cooler Master Masterbox 5 MSI Edition
Pages: [1]   Go Up