[HELP] HIS Radeon 7870 Fan Issue

how the temp? if it's still fine temp then it not a problem.... (below 40c in idle 60c in work, or 70c in stressing is good temp)

if the temp was not good, try download/using msi afterburner and set the fan as your liking...

This video card requires 2 x 6-pin connectors so if you are only using one connector then only one fan would spin however, this is not a good idea especially for pc games.

http://www.hisdigital.com/un/product2-699.shtml

If your PSU does not support 2 x 6-pin connectors for the video card then your PSU is probably not have the proper power requirement that the video card needs. I'd suggest a Corsair 750 watt PSU.

The temps seem fine. I'm just worried because the fans aren't working like they are supposed to be.

Right now i'm using 2x 6-pins and it still doesn't spin. I have a 650w NZXT PSU.

650w NZXT PSU seems adequate for the Video card.

What is your motherboard model, ram type, OS, and are there any other hardware connected like hdd?

Some motherboards do require a 6-pin or even an 8-pin support power connector as well as the usual 24 pin mains power connector.

This video card requires a "PCI Express 3.0 x16 bus interface " which is rather new age for most motherboards.
http://www.amd.com/us/products/desktop/graphics/7000/78...

Also, Windows 8 is the preferred OS for this Vdeo card, not sure whether earlier Oses will recognise the utilization if PCIe 3.0.

It might still be that the PSU is not providing adequate power despite requirements being met. Itmight be that you will need at least a 750 watt PSU so that adequate power is available for the fans, however all the reviews state that it does draw less power than lesser models.

Try playing a game or watching a movie and then see if the fans begin to spin. It might be that they are spinning but are very quiet and you can't hear them whirring.

Upon further research, it seems that Windows 8 is the only OS that initially supports PCIe 3.0 but there is a fix for Windows 7 -

http://www.evga.com/forums/tm.aspx?m=1607292&mpage=1

I just think it same as some PSU fans profile (silence serries), if it still cold the fan will turn off (lower noise lever), if it getting hot then it will start spinning.... (they even make this as plus poin / marketing feature)

but it only guessing, try contacting HIS consumer support to make sure

don't worry too much with pcie ex 3.0 the diffrent is minimal and only (little) noticed in 7970/680 tier card...
all pci-ex 3.0 backward compatible with 2.0

edit: I would try using afterburner custom fan profile for testing, see if after manually set the fan profile it still had same symtom or it will work as the custom fan profile..

If it had same symtom then there is something wrong....