X399 Taichi 4-pin CPU power connector
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=7236
Printed Date: 25 Apr 2025 at 2:22pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: X399 Taichi 4-pin CPU power connector
Posted By: rocker76177617
Subject: X399 Taichi 4-pin CPU power connector
Date Posted: 10 Jan 2018 at 1:32am
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" rel="nofollow - My new Corsair TX850m PSU didn't come with the extra 4-pin CPU cable. It just has one 24-pin and one 8-pin CPU cable. Can I just leave the 4-pin CPU port, which is located at the top left part of the mother board when the CPU is on the top, not connected? The manual says that 4-pin port for the VRAM. What will I miss by not powering the VRAM? Thanks
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Replies:
Posted By: MisterJ
Date Posted: 10 Jan 2018 at 2:19am
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rocker76177617, please don't leave it unpowered. I suspect that VRAM is Voltage for RAM. You need a more modern power supply. Enjoy, John.
------------- Fat1 X399 Pro Gaming, TR 1950X, RAID0 3xSamsung SSD 960 EVO, G.SKILL FlareX F4-3200C14Q-32GFX, Win 10 x64 Pro, Enermx Platimax 850, Enermx Liqtech TR4 CPU Cooler, Radeon RX580, BIOS 2.00, 2xHDDs WD |
Posted By: kerberos_20
Date Posted: 10 Jan 2018 at 10:46pm
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that top left 4pin should be for pci-e devices (but dont use pcie connector...its different pinout) |
Posted By: zlobster
Date Posted: 10 Jan 2018 at 11:51pm
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There are EPS12V splitter cables. Get one of these. Your PSU should be able to handle the load, even if you decide to OC. ------------- 1700X ZP-B1 (stock); X370 Taichi (UEFI 3.10); 16GB F4-3200C14-8GFX XMP; 256GB 960 EVO; RX 580 NITRO+ 8GB |
Posted By: rocker76177617
Date Posted: 11 Jan 2018 at 1:28am
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That 4 pin port on the top left is for VRM per ASROCK. I am not exactly sure what that does. I read somewhere powering that port is optional and in other places it is a must. So I am not sure what to make of it. I would like to hear it directly from ASRock. The 6 pin PCI-e port you are referring to is on the right side next to the SATA ports. I need to power it only when I use more than one GPU, I think.
Considering the TX850m is little higher than their mainstream PSUs, I am surprised Corsair didn't include an extra 8 pin CPU cable or even 4 pin but they packed plenty of SATA cables than I care. Soon all of my storage will be M.2 based. |
Posted By: kerberos_20
Date Posted: 11 Jan 2018 at 6:22am
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welll im not exactly sure if its optional or not but few years ago there was only 24pin for cpu and pci devices with introduction of pentium4 (power hungry cpu at that time) extra 4pin was needed (24+4) with introduction of pci-express another 4pin got added as wattege over pci-e is higher than on pci (24+8) and threadripper just happens that it has one more cpu to feed (24+12) so up to you if its optional :) |
Posted By: housingman
Date Posted: 12 Jan 2018 at 12:11am
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You definitely need the 4 pin connector plugged in. Please read this thread: http://forum.asrock.com/forum_posts.asp?TID=5905&PN=2&title=x399-c0-error-code  |
Posted By: datonyb
Date Posted: 12 Jan 2018 at 3:36am
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change psu to one that has enough support for the TR motherboards power needs to be quite fair the sales webpage and details do clearly show you what psu would be needed when designing your new system build a fast/simple option would be to buy a cpu/eps splitter plug autoleads do many versions and can be found on amazon ------------- [url=https://valid.x86.fr/jpg250]  [/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
Posted By: BC_ATM
Date Posted: 15 Apr 2018 at 2:10am
| Same issue for me but I have cables to all 3 power connectors... |
Posted By: BC_ATM
Date Posted: 15 Apr 2018 at 2:55am
| Also the times it did boot without power to the 4 pin. |