Corsair Hydro 80

maxzuk · 31 Dec 2011 at 19:42

Hi im just about to buy one of these but am a bit confused on a few details.

When I plug into cpu fan header will it control fan speeds or will it run on hydro preset settings. Would be nice for fans to be at speeds governed by bios to keep it quiet as possible but automatically drive it hard when pushing cpu

Have also read that you dont have to plug into cpu fan header just plug molex in, is this true(would have to turn off all fan monitoring in bios) and is this best prefer first option.

Thanks in advance for any replies but am finding a good google search very confusing.

Nigel

Cleeecooo · 1 Jan 2012 at 03:01

Not sure about this, but I'm pretty certain the H100 uses software for fan speeds which I believe is from the fan header.

TBH, you'll be much better going for a noctua DH14

ns400r · 1 Jan 2012 at 03:30

The fan(s) plug in to the pump body. Circuitry inside the pump body control the fan speed according to one of three preset profiles.

A2BDriver · 1 Jan 2012 at 03:32

maxzuk said:
When I plug into cpu fan header will it control fan speeds or will it run on hydro preset settings. Would be nice for fans to be at speeds governed by bios to keep it quiet as possible but automatically drive it hard when pushing cpu

No. The cpu fan wire is so you can see the pumps speed in the BIOS or monitoring software you use. The fans run on 3 different profiles, with a set RPM range.

Hers a link that explains the different profiles http://www.corsair.com/blog/understanding-the-hydro-series-h80-and-h100-cooling-performance-profiles

Each profile has a set RPM range that it will run the fans at. The fan speed will increase to the upper RPM limit of the selected profile as the liquid temperature rises and lower the fan speed when the temperature allows it. This allows the fans to run quieter.

maxzuk said:
Have also read that you dont have to plug into cpu fan header just plug molex in, is this true?

I would think so, yes.

maxzuk said:
would have to turn off all fan monitoring in bios) and is this best prefer first option.

I've left my cpu fan header at 100% doesn't make a difference I dont think, but you can still use your other fan monitoring headers.

maxzuk · 1 Jan 2012 at 08:50

Thanks for that makes sense now

maxzuk · 1 Jan 2012 at 08:57

A2BDriver said:
I've left my cpu fan header at 100% doesn't make a difference I dont think, but you can still use your other fan monitoring headers.

Are you refering to bios setting here

Sorry for being completely dumb on this.

A2BDriver · 1 Jan 2012 at 13:38

controlling the fan speeds in bios, yeah

bloodhunter · 1 Jan 2012 at 15:38

I have just installed a H80 and connected it to the Molex and have not connected the other wire. I connected the two radiator fans to the pump.
I set the fan speed to max on the pump but the fan speed varies depending on load as when i game the speed rises then goes slower when web browsing etc.

BTW my OC'd Q9650 now @3.6Ghz runs at no more than 49 degrees when gaming so i am well chuffed.
I guess the other wire can go to the CPU fan header to see what RPM they are turning at.

maxzuk · 1 Jan 2012 at 16:15

Thanks guys.

This forum could really do with a thanks tab like other forums

ns400r · 1 Jan 2012 at 21:42

bloodhunter said:
I have just installed a H80 and connected it to the Molex and have not connected the other wire. I connected the two radiator fans to the pump.
I set the fan speed to max on the pump but the fan speed varies depending on load as when i game the speed rises then goes slower when web browsing etc.

That is correct, the fan speed will rise as the pump detects that the liquid temperature has risen. Setting the fan to high speed profile 3 will not run it at max all of the time, only when a rise in temperature according to that profile is detected.

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