Go Back   MacRumors Forums > Apple Hardware > Desktops > Mac Pro

Reply
 
Thread Tools Search this Thread Display Modes
Old Feb 20, 2013, 12:42 PM   #1
mjsmke
macrumors 6502a
 
Join Date: Mar 2010
Location: UK
6 pin PCI E cables - Radeon 6870 fan noise

Hi there!

I just picked up a second hand PowerColour 6870 for my Mac Pro 4.1. (thought it was time to upgrade the GT 120!)

I know i need 2 power cables and found a link on here to OWC:

http://eshop.macsales.com/item/Apple/9227128/

I'd prefer to get them sooner so started looking around online but can't find any anywhere. I can only find male to female extensions.

Does anyone know where to find them in the UK?
__________________
2009 Mac Pro 2.93GHz Xeon, 14GB RAM, 120GB Mercury extreme SSD, iMac G4 as media centre.

Last edited by mjsmke; Feb 23, 2013 at 03:07 PM.
mjsmke is offline   0 Reply With Quote
Old Feb 20, 2013, 12:56 PM   #2
Loa
macrumors 65816
 
Join Date: May 2003
Location: Québec
Hello,

Search for "pcie g5 power cable" in ebay.

Loa
Loa is offline   0 Reply With Quote
Old Feb 20, 2013, 01:41 PM   #3
cal6n
macrumors 68000
 
cal6n's Avatar
 
Join Date: Jul 2004
Location: Brighton, UK
I just bought a pair. Here you go:

PCIe 6-pin (UK)
__________________
Is your internet experience tainted by trolls, shills, bigots & fools?
Select "User CP" > "Edit Ignore List" > Add [username] to Your Ignore List > Save List
Every little helps.

Last edited by cal6n; Feb 20, 2013 at 06:36 PM. Reason: clarity
cal6n is offline   0 Reply With Quote
Old Feb 20, 2013, 03:29 PM   #4
mactune
macrumors newbie
 
Join Date: Feb 2013
The cable you need is called mini pci-e 6pin to pci-e 6pin.
Hope this helps.
mactune is offline   0 Reply With Quote
Old Feb 23, 2013, 03:11 PM   #5
mjsmke
Thread Starter
macrumors 6502a
 
Join Date: Mar 2010
Location: UK
Thanks for all the help everyone. I now have the cables i needed and have my 6870 installed and working!

The card works fine but the fan isn't all that quiet. My old GT 120 was silent all the time. Is this normal? Or is there a way to lower the idle speed of the GPU fan?

P.S What a difference this card makes! I know its not one of the best cards out there but in applications like Photoshop/Lightroom/Maya and even just moving windows around the monitors feel smoother.
__________________
2009 Mac Pro 2.93GHz Xeon, 14GB RAM, 120GB Mercury extreme SSD, iMac G4 as media centre.
mjsmke is offline   0 Reply With Quote
Old Feb 24, 2013, 02:53 AM   #6
DanielCoffey
macrumors 65816
 
DanielCoffey's Avatar
 
Join Date: Nov 2010
Location: Edinburgh, UK
If you have the space in your case, you could replace the cooler with something more efficient and quieter.

I did that with my Apple 5870 and it has been working flawlessly for the past two years... http://forums.macrumors.com/showthread.php?t=1097022
DanielCoffey is offline   0 Reply With Quote
Old Feb 24, 2013, 07:36 AM   #7
Loa
macrumors 65816
 
Join Date: May 2003
Location: Québec
Hello,

Quote:
Originally Posted by mjsmke View Post
The card works fine but the fan isn't all that quiet.
Idling 6870 should be very quiet.

Try this thread.

Loa
Loa is offline   0 Reply With Quote
Old Feb 24, 2013, 08:32 AM   #8
mjsmke
Thread Starter
macrumors 6502a
 
Join Date: Mar 2010
Location: UK
Quote:
Originally Posted by Loa View Post
Hello,



Idling 6870 should be very quiet.

Try this thread.

Loa
That thread seems to be about the PCI fan running fast, not the GPU fan.
__________________
2009 Mac Pro 2.93GHz Xeon, 14GB RAM, 120GB Mercury extreme SSD, iMac G4 as media centre.
mjsmke is offline   0 Reply With Quote
Old Feb 24, 2013, 10:26 AM   #9
cal6n
macrumors 68000
 
cal6n's Avatar
 
Join Date: Jul 2004
Location: Brighton, UK
Quote:
Originally Posted by mjsmke View Post
That thread seems to be about the PCI fan running fast, not the GPU fan.
The fans that ATI use are generally silent but a few of them seem to fail early and become quite noisy. If this is the case with yours, you'll be able feel a little sideways play in the bearing. There should be none whatsoever. Since the fans are virtually unobtainable in the UK, these noisy cards tend to wind up on eBay.

You can either buy a new fan from the states on eBay for about £13 or fit an aftermarket cooler for upwards of £35.

I sometimes come across reference design 5870s (a better choice than the 6870, strangely enough) and fit a new fan as a matter of course before flashing them and selling them on.
__________________
Is your internet experience tainted by trolls, shills, bigots & fools?
Select "User CP" > "Edit Ignore List" > Add [username] to Your Ignore List > Save List
Every little helps.
cal6n is offline   0 Reply With Quote
Old Feb 24, 2013, 11:53 AM   #10
mjsmke
Thread Starter
macrumors 6502a
 
Join Date: Mar 2010
Location: UK
Quote:
Originally Posted by cal6n View Post
The fans that ATI use are generally silent but a few of them seem to fail early and become quite noisy. If this is the case with yours, you'll be able feel a little sideways play in the bearing. There should be none whatsoever. Since the fans are virtually unobtainable in the UK, these noisy cards tend to wind up on eBay.

You can either buy a new fan from the states on eBay for about £13 or fit an aftermarket cooler for upwards of £35.

I sometimes come across reference design 5870s (a better choice than the 6870, strangely enough) and fit a new fan as a matter of course before flashing them and selling them on.
Thanks for the help. If I don't get use to the sound i'll look at getting a replacement fan.
__________________
2009 Mac Pro 2.93GHz Xeon, 14GB RAM, 120GB Mercury extreme SSD, iMac G4 as media centre.
mjsmke is offline   0 Reply With Quote
Old Feb 25, 2013, 01:31 PM   #11
MacVidCards
macrumors 603
 
Join Date: Nov 2008
Location: Hollywood, CA
 
6870s with 2 wire fans are much noisier than ones that come with 4 wires.

If it only has 2 wires, it has limited speed control at best, so to avoid overheating they run them faster. The card stays cool until the fan wears out prematurely.
MacVidCards is online now   0 Reply With Quote
Old Feb 25, 2013, 06:10 PM   #12
mjsmke
Thread Starter
macrumors 6502a
 
Join Date: Mar 2010
Location: UK
Quote:
Originally Posted by MacVidCards View Post
6870s with 2 wire fans are much noisier than ones that come with 4 wires.

If it only has 2 wires, it has limited speed control at best, so to avoid overheating they run them faster. The card stays cool until the fan wears out prematurely.
I'll have a check tomorrow to see if its a 2 or 4 wire fan and let you know.

I remove an reinstalled it earlier but didn't think to look at the wires. I noticed when i lift the corner of the card about 2mm the noise is reduced. So ill also check the case is screwed on tight when i get a chance.
__________________
2009 Mac Pro 2.93GHz Xeon, 14GB RAM, 120GB Mercury extreme SSD, iMac G4 as media centre.
mjsmke is offline   0 Reply With Quote
Old Feb 25, 2013, 07:20 PM   #13
slughead
macrumors 68030
 
slughead's Avatar
 
Join Date: Apr 2004
My sapphire is dead quiet, my XFX is ridonculously loud.
slughead is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Desktops > Mac Pro

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Resolved: ATI Radeon HD 6870 Help Required. Washac Mac Pro 15 May 11, 2013 11:55 AM
4 pin Molex to 8 pin PCI DawgBone Mac Pro 7 Apr 24, 2013 06:14 AM
ATI Radeon HD NI40 (6870) 92jlee Mac Pro 1 Dec 25, 2012 06:24 PM
Need Help to EFI Flash a Radeon HD 6870 Washac Mac Pro 14 Nov 10, 2012 11:03 AM
Which Radeon 6870? FreakIndeed Mac Pro 14 Jun 29, 2012 05:19 PM

Forum Jump

All times are GMT -5. The time now is 01:48 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC