Can't boot with pump connected

Sctheek · Oct 24, 2016

Hello!

I'm unable to boot with my aquastream xt connected.

I've tried with two different psu:s (500w and 1000w) and with different cables.

I'm using one stick of RAM and got nothing but the 24 pin and 8 pin connected to the mobo. And the mobo is the only thing connected to the psu.

Got the mobo on the cardboard box it came in since it's easier to search for errors and I do not own a proper test bench.

When the pump isn't connected I can boot up to bios without any problem, but resetting and connecting the pump makes the startup halt when the pump starts.

If i bridge the psu the pump runs just fine and when connecting the pump to my brothers rig his computer boot like normal.

This makes me think it has something to do with the pumps startup current, but can't figure out how it can halt a boot up.

PSU1: corsair 500cx
PSU2: coolermaster 1000w (bronze)
PSU3: corsair hx850i

Mobo1: asus Maximus gene VIII
Mobo2: asus Maximus hero VI

CPU1: I7 6700K
CPU2: I7 4700K

My system contains psu: 1-2 mobo/CPU: 1

Eldy · Oct 26, 2016

Have made sure to connect the CPU FAN and HEADER connectors? Your system will not post if it has not been connected.

Aeacus · Oct 26, 2016

Your Corsair is Tier four PSU and your Cooler Master is Tier three PSU, while your brother has a solid Tier one PSU. Tier three vs Tier one is a big difference.
PSU Tier list: http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

To run your system with a pump, go atleast with a Tier two PSU, preferably Tier one.

Anything from Seasonic is great, 700W range will do just fine.
link: https://seasonic.com/product-category/consumer-products/?filter_wattage-range=32
For Tier two, i suggest either M12II-750 EVO or G-750.
For Tier one, i suggest either Snow Silent 750 or X-750.
But if you want to have the best of the best, then either a Platinum 760 or PRIME 750 W Titanium.

Sctheek · Oct 27, 2016

Eldy :

At the moment I have a stock cooler installed and connected to the mobo. with the stock cooler it boots. Then i connect the pump with the 4-pin molex only and it won't boot.

Aeacus :

My thought aswell, the thing that bothers me is that the PSU and pump is from my old setup and never had any problems with it then...
Will try to get my hands on a higher tier psu or borrow my brothers, to test with my components and see if that works.

But a higher tier means better efficiency, I can't se how that would affect the boot sequence..?
A lower tier PSU should to the exact same work as a higher tier but with less efficiency.

Aeacus · Oct 27, 2016

Efficiency is measured by the 80+ standard. Most PSUs are either 80+ Bronze or 80+ Gold.
Higher tier PSU doesn't mean only better efficiency but also better build quality, reliability and protections (e.g over current, undercurrent).

My best guess would be that your old build didn't draw as much power on startup than your new build does. Hence the reason why it worked then and doesn't work now.

Sctheek · Oct 27, 2016

Aeacus :

Okey so tier and the 80+ certificate is two diffrent things, make sense.

Higher power consumption seems odd, went from a 2700k at 3.8Ghz to a unclocked 6700 which should draw less power, the mobo and the pump is the only things connected. The CPU TDP is at 95W say 120W at startup with the mobo included, the pump might be at 40W at startup, with those numbers the startup current shuld be below 200W. That should any PSU be able to handle, discarding the tier.

Aeacus · Oct 27, 2016

Your two PSUs should handle the startup power consumption but for some reason, they don't. I don't know PSU internal workings that well to give you an answer why you system doesn't boot with pump connected.
Perhaps lower Tier PSUs doesn't deliver stable enough current to complete the boot sequence. That may be the reason but i can't say for sure.

Sctheek · Oct 28, 2016

Aeacus :

Ripped out my brothers PSU and used it, now I can boot with the pump connected.

So my conclution would be that the higher tier PSU might have a common "ground" where lower ones have separated ones.

With a common ground it would be possible for a backcurrent to affect everything connected to the PSU. This will be not be possible with separeted ones.

Will be ordering a new one, I like corsairs but will take a look at seasonic ones aswell.
At the moment my PSU is the loudest thing in the setup.

Aeacus · Oct 28, 2016

All Seasonic PSUs are using either a S2FC or S3FC modes for silent operation.

S2FC
The intelligent thermal circuit feature is designed to find the optimal balance between the necessity to cool the components and the need to run the power supply in the most silent manner possible.

E.g M12II-750 EVO

S3FC
Hybrid Silent fan Control

The industry’s first, Seasonic patented, advanced three-phased thermal control achieves optimal between silence and cooling. This Hybrid Silent Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode.

E.g Platinum 760

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Can't boot with pump connected

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