New XFX 6870 running at x8

[luismenendez]

Hi there,

i just installed a new 6870 and fist impression is disapointment due to the high noise of the fan running by default at 59%; i am thinking to send it back
I could fixed the spped to 40% but then when it gets hot the fan won't increase speed.

I also have the PCI-e at x8 as the slot at x16 is the lower one where the card will run hoter. There is any noticiable performance increase from x8 to x16?

thanks

 

[Orcvader]

Use MSI AfterBurner to create a custom fan profile; that way you can let it speed up to reasonable speeds that won't be too loud for you.

Your board is PCI-E 2.0, so you'll only be losing ~1-3% performance, which in real world terms is pretty much no noticeable performance lost. But surely the card should be cooler on the top slot? Why the 4th slot downwards? What's the airflow like in your case?

 

[luismenendez]

thanks for the speedy anwser

Yes the board is PCI 2.0 (Biostart TA790GX128M) and the funny thing the box says two PCIE 2.0 X16 (dual x8 for CFX). Installing the card in the lower slot will make it much hoter as u said. Airflow is one 12 fan in take in the front, 8cm intake on the side and 12 on the back to extract hot air + 14cm fan PSU.

Just run at 3D application and fan went to 70% and very noisy

So msi afterburner is the best for fan custom profiles? never heard of it but I stopped overclocking a couple of years ago when I started to feel that I had enough power for my PC needs

 

[Orcvader]

Because all lanes are directly connected from the PCI-E controller to the top slot, but when something is connected to the bottom slot a PCI-E switcher needs to redirect 8 lanes from the top slot to the bottom slot. It can't redirect all the lanes. This is normal though on all boards (unless the PCI-E controller has more lanes to play with).

Yes, MSI AfterBurner is the best to create a fan profile with . You set up a graph to and choose what speeds it will spin at what temps, so everything will change automatically for you in the background.

Here's a link to AfterBurner: http://event.msi.com/vga/afterburner/download.htm

Guide is here to set up the custom profile, starting on page 19: http://event.msi.com/vga/afterburner/images/Afterburner User Manual.pdf

I would also tick "Start with Windows" and "Start minimized" as well so as soon as you boot into Windows the profile will also start up with it. AfterBurner must be running for the fan profile to stick.

 

[luismenendez]

cheers mate, i am downloading now, the noise is driving me crazy