Upgrade/New Build Advice

Built it last night, took me an absolute age because I was so rusty. Booted into Bios and then left it there, so will install windows etc tonight. Couple of (possible newbie) questions.

My Mobo CPU power has both an 8 and 4 pin. I read that the 4 pin is optional, is that correct? Should I plug the 4 in if I'm going for 5ghz?

The vega 56 required two 8 pin connectors. I used a cable from my PSU that had two 8 pins on it:

tNmNd0l.png


Is this OK, or should it have two 'dedicated' 8 pin power connectors going into it? I'm going to be undervolting/overclocking the vega 56 of course.

Cheers!
 
Ewaf said:
Built it last night, took me an absolute age because I was so rusty. Booted into Bios and then left it there, so will install windows etc tonight. Couple of (possible newbie) questions.

My Mobo CPU power has both an 8 and 4 pin. I read that the 4 pin is optional, is that correct? Should I plug the 4 in if I'm going for 5ghz?

The vega 56 required two 8 pin connectors. I used a cable from my PSU that had two 8 pins on it:



Is this OK, or should it have two 'dedicated' 8 pin power connectors going into it? I'm going to be undervolting/overclocking the vega 56 of course.

Cheers!
Click to expand...

did you grab the formula PSU ? if so or even if it wasn't- you want to use TWO PCIe power cables to the GPU if possible! some times vega can trip PSU's using one cable that has a split for 2 x 6+2 pin plugs .

If you can get the Vega undervolted then by all means try one cable instead of two

If you've got the spare 4 pin CPU plug then use it, its not just about supplying more power but how its supplied evenly . Using one plug and drawing lots of power can actually mack the plug socket and surrounding area's quite warm. spreads the load as well and other mumbo jumbo i forget about
 
I got the "Corsair - TXM Gold 650 W 80+ Gold Certified Semi-Modular ATX Power Supply".

Ok cool, I'll just whack in another cable to the GPU, and to the CPU!
 
As above, might as well use the extra CPU 4-pin if you have it.

As far as using two distinct PCIe power cables for GPU, this can even give you a slight performance boost, even when not actually needed. And a good quality PSU can bring about a slight GPU temperature drop v not-so-good or old PSU.


Swapped an EVGA 600 80+ for a Seasonic Focus Plus 550W 80+Gold in someone's system yesterday, and the GTX 1060 in that build ran at 62C in Heaven v 65C, believe it or not.
 
@Danny75

I think why Buildzoid has been doing videos about VRM power delivery - shows not just the amount of Phases used or the Units but how its wired from plug to unit to chip etc

though i know techiically Multi rail PSUs fare better with multiple CPU sockets, but only worth while for server/ thread ripper style boards
 
Bit of a predicament. I went to plugin a 4 pin into the CPU power on mobo, next to the 8 pin, and realised I don't actually have one. My PSU is semi modular, the fixed cables are obviously the big one for the mobo, then the 8 pin for the CPU. I don't see to have a 4 pin, and none of the other cables split.

Any ideas?
 
So things aren't going that smoothly. PC is running fine on stock everything, but got some pretty bad issues:

1. Constant static/buzzing/whining through headphones, changes frequency when moving mouse. I had this several years ago but can't remember how i fixed it, I've ordered a ground loop isolator to see if that hepls (headphones use 3.5jack on rear panel).
2. GPU has horrendous coil whine when playing games, which intensifies the whining/buzzing through the headphones, too.
3. Rainbow six siege is artefacting horribly. I haven't done anything to the GPU yet. Wondering if it's a bad GPU?

Video below:

https://photos.app.goo.gl/vQ9njfoVN8fJcNfn6

Pretty gutted tbh, first new build since 2013 and it's not going well!

EDIT: Ok, so the artefacting is actually just rainbow six siege specific, known issue with vega cards:

https://www.reddit.com/r/Amd/comments/aq00wc/artifacting_on_vega_56_latest_rainbow_six_update/

Worrying that it's existed for 30days and it's not fixed yet.

In other games, still have pretty mad coil whine but read that it may settle down eventually, or undervolting will sort it, which I'll try.

Hopefully the ground loop isolator will fix the constant buzzing/static/whining through the headphones, if not may have to try USB headset, as I've already spent hours researching with no solution.
 
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Can you list the final spec you ended up with, Ewaf?

The coil whine might settle yes, running Furmark for a while might help run the capacitors in. 14 day rule - reject goods full refund, keep that in mind just in case.

Are you using a separate headphones + mic solution, or all-in-one headset?

A cheap USB DAC with headphone and mic ports could be a solution depending on what you have. Rather than having to use a USB headset (unless it's good of course).
 
Build below:

CPU: Intel - Core i5-8600K 3.6 GHz 6-Core Processor
CPU Cooler: be quiet! - Dark Rock 4 CPU Cooler
Motherboard: Gigabyte - Z390 GAMING X ATX LGA1151 Motherboard
Memory: Kingston - Predator 16 GB (2 x 8 GB) DDR4-3200 Memory
Video Card: Sapphire - Radeon RX VEGA 56 8 GB PULSE Video Card
Power Supply: Corsair - TXM Gold 650 W 80+ Gold Certified Semi-Modular ATX Power Supply

Will keep an eye on the coil whine and see what happens when I undervolt.

Using seperate headphones and a mic yea. Have tried multiple headphones and problem still exists, Google throws up hundreds of threads (a lot on these forums too) of same issue, but not sussed it yet. Hoping the ground loop isolator does the trick.
 
Ewaf said:
Using seperate headphones and a mic yea. Have tried multiple headphones and problem still exists, Google throws up hundreds of threads (a lot on these forums too) of same issue, but not sussed it yet. Hoping the ground loop isolator does the trick.
Click to expand...

Yeah. Never happened to me so far but heard about similar issues. One reason I went for a cheap Creative Play3 USB DAC for the Philips SHP9500S headphones and Vmoda Boom Pro mic I'm using.
 
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