How do I run a miner at half speed

[sethsethseth]

I want to mine with my 5970's at half speed so I do not have to raise the fan speed and have the house sound like a server room.  How do I do this?

[DeathAndTaxes]

One option is to use cgminer.

Set engine speed to half max speed, lower the memory speed, set intensity to dynamic and set fan to 50%.

[RyNinDaCleM]

Run on one core?!?

[Tuxavant]

nice it?

[LegitBit]

I want to mine with my 5970's at half speed so I do not have to raise the fan speed and have the house sound like a server room.  How do I do this?

Use guiminer (or backend) with -s 0.02

This creates a pause and effectively reduces speed and temps.

[P4man]

The sensible approach is using cgminer and defining a maximum fan speed that produces noise levels you find acceptable. Then use dynamic clocks and set a maximum temperature you find acceptable. cgminer will clock the card up and down to match the temperature at your given fan speed.

[jake262144]

Some outstanding cgminer-fu from P4! The force is strong in you, my man.

I used this approach to find the maximum acceptable clocks when upgrading my home server into a half-decent mining rig.
As I like to have full control over the GPUs, once I found those clocks, I set them in cgminer's config file, then set the overheat temp at target_temp +3°C.
This way, if any of the fans goes belly up, the card will aggressively attempt to cool itself down and the noise will bring the issue to your attention.

[zvs]

use phoenix and set aggression to 2

[goxed]

You can sell 5970 and buy a 5870.

[cuz0882]

There is a setting that will slow mining down to maintain a set temperature. I would recommend that if heat is your concern.