G5 Quad's 7800GT Fan > Loud and Fast!

Discussion in 'PowerPC Macs' started by OrangeSVTguy, Jul 13, 2010.

  1. macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #1
    So is there anyway to fix this other than buying a new graphics card? I've searched but couldn't find a solution.

    The 7800GT in my G5 always spins at top speed and is so much louder than the whole system. I've had it disconnected for a while but I don't want it burning up :(. Thinking I just might wire it to the 5v side of the molex connector on the optical drive?
     
  2. macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #2
    If you want to enjoy your 7800 for a long time, do not disconnect it's fan ;)
    I'd recommend getting new cooler for it, such as Nvsilencer rev 5 - efficient, silent and throws warm air out of case. Difference between stock 7800 and Nvsilencer is huge, in noise level and cooling efficiency too.
     
  3. macrumors 68000

    4JNA

    Joined:
    Feb 8, 2006
    Location:
    looking for trash files
    #3
    AC keeps things cool.

    i'd go with THIS but it's probably because i love AC, arctic silver 5, mx-2, and every heat sink from them that i've used for vga and cpu... lots. :)

    have the equivalent vga cooler on my x1900 and it's been fine for a hot running card. add a slow running fan for more air if you are going to work it hard. best of luck.
     
  4. thread starter macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #4
    Thanks, I've been looking around for that one on ebay but one hasn't surfaced yet.

    I swapped the heatsink/fan from my 6800 Ultra and now it's running good for now until I can scrape up the NVSilencer. The GPU temp even dropped 10*F and now I can't even hear the fan.

    I even thought up of tying it into the LC system :eek::D But I am not sure how much that would impact the cooling for the CPUs from the extra heat?
     
  5. thread starter macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #5
    Great thanks! Looking at that installed doesn't look like it would work in G5 without removing the clear air baffle first though... But I do like the idea of a passive cooler though. It's so hard finding the NV Silencer 5 but I will eventually.

    **added**
    After doing some more searching, I think I may go with the Zalman VF1000. It will fit the G5 correctly and going from reviews, does a great job with cooling.
    [​IMG]
     
  6. macrumors 68040

    AlphaDogg

    Joined:
    May 20, 2010
    Location:
    Boulder, CO
    #6
    That looks like a very capable heatsink ;).
     
  7. macrumors 6502

    Joined:
    Jul 28, 2009
    #7
    I still have my 7800 GT in my PC.
    It still can play games like Left 4 Dead and Team Fortress 2 with medium settings.
     
  8. thread starter macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #8
    Found and installed the Arctic Silencer NV5 Silencer. Works great and dropped my temps a bit further. Nice and quiet too :D

    Did have to do a little modification to the rear screw on nuts. I had to grind them down as they protruded too far out hit the CPU divider. Busted out the old angle grinder and grinded them down to about 1/8". Fits all nice and snug now with clearance.
     
  9. macrumors 6502

    Joined:
    Jan 14, 2002
    Location:
    Los Angeles and NorCal
    #9
    i thought the NV5 for 7800gt was discontinued? I couldn't find any when i was looking for them
     
  10. macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #10
    I've forgotten to mention about screws. I use very flat nuts (2 mm diameter) instead of factory ones.

    They are sometimes on eBay, look for Rev.3. On my local market they are on sales for equivalent of $2 + shipping :D
     
  11. thread starter macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #11
    So the NV3 was also compatible? I got lucky with the NV5 I found on ebay. It was basically $20 shipped so I'm very happy with it.

    I looked all over but couldn't find any nuts small enough to fit those small threads. I did remember reading about this on the internet anyways so I was prepared for the worst lol. So I did the next best thing, grind down the ones that were supplied :p. I also had to break off the screw threads a bit to make clearance. Works great now otherwise. :)
     
  12. macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #12
    Sorry, I wasn't precise. I meant NV Silencer 5 Rev.3 - this rev was last IIRC and has improved fan bearing.
     
  13. macrumors 6502

    Joined:
    Jan 14, 2002
    Location:
    Los Angeles and NorCal
    #13
    wow, that's really cheap. I wish I could have gotten one for that price. Oh well, I'm trying to sell my 7800GT card now. Just trying to get to 250 posts so i can use the marketplace. I'm been on this site since 2002 but only managed 170 posts...LOL
     
  14. thread starter macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #14
    Just checked the packaging and I did get the Rev3 :D. You should buy up every single one of them and sell them in the states lol. $2.00 is cheap :eek:
     

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