Yes, I do. I sent you some pm's. Thanks
This is a quick guide to adjusting minimum fan speed via bios flashing. This is NOT something I recommend for the faint of heart. It's easy enough, but there is the risk of a bad flash and "bricking" your card. You can always recover with a blind flash using the original bios but it's a pain in the arse. The risk is there but it's a remote risk at best if you're savvy.
I recommend playing around with a trash bios file using RBE to see if you want to move forward. Here's one:
http://www.techpowerup.com/vgabios/63278/XFX.HD5870.1024.091126_1.html
So you're ready, on to modding..
First download GPU-Z:
http://www.techpowerup.com/downloads/1709/TechPowerUp_GPU-Z_v0.3.8.html
Launch, click the icon pictured below, select save to file. Default name for 58xx is Cypress.bin:
Safeguard your original file! Create a copy and name it something different, 5870mod.bin for example. Don't mess with your original bios.bin file. Mod the copy.
Download and run RBE BIOS EDITOR:
http://www.techpowerup.com/downloads/1748/TechPowerUp_Radeon_Bios_Editor_v1.24.html
Open your saved mod file with RBE, navigate to the fan settings tab and:
1) Click "set all fan settings to recommended values"
2) Adjust the default min duty cycle to desired value.
35% is a suggested starting point, though depending on your rig's noise level, 40% may be tolerable. I suggest using CCC prior to all of this to get an idea of what min fan speed works for you. Remember, fan will run at this minium from here out.
With my 4870s and 5870s, 35% meshed very well with other case noise, 40% was audible over other fans, and anything higher was noisy.
Here's a pic of the RBE tab you'll be working in:
Save the file, note that RBE changes the extenstion to .rom. You can leave it or change it back to .bin. ATI flash will work with either extension.
Make a USB boot drive per instructions. You can also do CD/DVD, or floppy:
http://www.techpowerup.com/articles/overclocking/vidcard/34/5
Download ATI Flash. DO NOT use the Windows version. It's not as reliable as the DOS version:
http://www.techpowerup.com/downloads/1731/ATIFlash_3.79.html
Print ATI flash instructions:
http://www.techpowerup.com/articles//overclocking/vidcard/34/8
Unzip and move atiflash.chg and atiflash.exe to the bootable USB.
Copy modded biosfile to the bootable USB.
Notes on ATI flash:
A card in primary PCI-E slot is card 0. A card in secondary PCI-E slot is card 1.
Typical command prompt for a single card flash:
atiflash -f -p 0 biosname.bin
Change mobo bios settings to boot using your USB drive. Pretty much one command as noted above and you're done.
Other considerations on this, you are modding the bios which technically can be playing around with your warranty, but IMO, a simple fan speed adjustment is not a serious modification. You've not changed clocks or anything. I suppose it would be up to the manufacturer. That's if they even [cough] noticed the fan speed was set higher in the bios.