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Asus Crosshair VI X370...Question Regarding power delivery

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post #1 of 20 (permalink) Old 02-28-2017, 04:40 PM - Thread Starter
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Hello, I have pre-ordered both a ryzen 1800x and the Crosshair VI. However, I noticed that the board has a 8+4 pin power deliever for the CPU. My current powersupply is a 600w and only has the 8 pin cpu plug. I will be doing some oc but not extreme oc'ing. My question is do I need the extra 4 pin. My current supply works well for my 6600k oc'ed to 4.6 on air and a good oc on my MSI GTX 1070 gaming z. My current board is an ASUS z170-a. Any thoughts and advice? I am going to upgrade my psu but would like to order an NVMe drive first (I am running a standard Hard disk at the moment) and this would eat up my budget.

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post #2 of 20 (permalink) Old 02-28-2017, 09:18 PM
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No I don't think you need the extra 4 pin. The reason for it is the ROG Crosshair VI Hero is made for overclocking more so than the other "gaming" boards.

From https://www.overclock.net/a/gpu-and-cpu-power-connections
Quote:
Main Boards with a 4 pin ATX12V CPU power receptacle can supply 155 continuous watts
Main Boards with an 8 pin EPS12V CPU power receptacle can supply 235 continuous watts
So unless you plan on pushing > 235W it isn't necessary

I think a more important consideration if you are overclocking is that your PSU has a low ripple current and tight voltage regulation as Ryzen is supposed to have a very tight voltage requirement.

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post #3 of 20 (permalink) Old 03-01-2017, 10:08 AM
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you need both 8 pin (4+4) and the 4 pin eps plugged in or the board will not boot.

it's on the manual, sorry.
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post #4 of 20 (permalink) Old 03-01-2017, 11:39 AM
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As a point of interest that 4 pin plug is useful. I had an 8 pin cord go bad on me that took some time to track down as it caused stability issues. Other more extreme users have melted and burnt the 8 pin plug and socket on boards without that extra 4 pin socket.

So you have to ask yourself how hard are you going to push it when choosing a board. These are octacores too.

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post #5 of 20 (permalink) Old 03-01-2017, 12:39 PM - Thread Starter
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Quote:
Originally Posted by pigr8 View Post

you need both 8 pin (4+4) and the 4 pin eps plugged in or the board will not boot.

it's on the manual, sorry.

Do you have a copy of the manual? I hanlvent seen it. I may have missed it online

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post #6 of 20 (permalink) Old 03-01-2017, 03:43 PM
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If it is indeed true that you need to plug in the extra 4 pin CPU power connector I apologize for any misinformation. Many power supplies do not carry an extra 4 pin so I'd be surprised if that were the case. The manual isn't online on the actual ASUS website so if pigr8 received a review sample then it's possible.

For example:
Seasonic G series = 4+4 pin EPS12V/ATX12V
Seasonic X series = 4+4 pin EPS12V plus 8 pin EPS12V
Seasonic PRIME = 4+4 pin EPS12V x2
EVGA Supernova G2 = 4+4 pin EPS12V x2
EVGA Supernova G3 = 4+4 pin EPS12V x2
EVGA Supernova P2 = 4+4 pin EPS/ATX12V x2
BeQuiet Dark Power Pro 11 = 4+4 pin EPS12V x2
Corsair RMi = 4+4 pin EPS12V x1 unless 850W+
Cooler Master V Series = 4+4 pin EPS12V x 1
Corsair CX v2 = 4+4 pin EPS/ATX12V x1
Corsair Hxi = 4+4 pin EPS12V x2
XFX XTR = 4+4 pin EPS12V x1
EVGA BQ = 4+4 pin EPS/ATX12V x1

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post #7 of 20 (permalink) Old 03-01-2017, 04:20 PM
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Sure you can just plug in just the 8pin to boot. If you want to get better OC, you will want to use the extra 4pin.
Unless this is changed now with new X370 boards.

Getting a good PSU that supports dual EPS is best when you spending a lot on a top mobo.
EVGA G2/G3/P2 are your best choice.

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post #8 of 20 (permalink) Old 03-01-2017, 05:05 PM - Thread Starter
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Thank you everyone. I ended up pulling the trigger on an evga supernova g3 1000w psu. It was on sale on Amazon for 139.00. If I'm going to do it might as well do it right. Here's hoping for a good overclock!

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post #9 of 20 (permalink) Old 03-01-2017, 05:38 PM
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1000w? What are you going to use. Not even OC + dual GTX1080 would need 1000w.
750W G3 is $100 and will be more than plenty.

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post #10 of 20 (permalink) Old 03-01-2017, 05:59 PM - Thread Starter
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Quote:
Originally Posted by Sp33d Junki3 View Post

1000w? What are you going to use. Not even OC + dual GTX1080 would need 1000w.
750W G3 is $100 and will be more than plenty.

Your right but I found it on sale for only 129.00 vs 109.00 for the 850w plus a generation newer with better reviews. So I felt it was worth an extra $20. I am planning on running sli in the future.

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