Page 1 of 3 123 LastLast
Results 1 to 10 of 23

Thread: Athlon II Passive cooling?

Hybrid View

  1. #1
    Join Date
    Dec 2009
    Location
    Italy
    Posts
    176

    Default Athlon II Passive cooling?

    Hi everyone. I'm building a media center with the following components:
    Motherboard: ASUS M4A785T-M
    CPU: AMD Athlon II 235e (TDP 45W)
    RAM: 2x 2 Gb kingston 1066 Mhz DDR3
    Case: Antec New Solution NSK2480 -EC

    In order to get a quiet system, I would like to limit the number of fans (especially smaller ones which are louder). So I wonder if I can use the stock Phenom II 940 heatsink I have (without fan) to cool the CPU. The case has two 12 cm fans, which should create a good airflow. Also the box won't have an hard disk (PXE boot).
    Is this possible? May it damage the CPU?

    Thanks in advance

  2. #2
    Join Date
    May 2008
    Location
    Germany/NRW
    Posts
    510

    Default

    My guess is that it should work, but there's no way to be sure except if you try out.
    Your CPU will definitely not get damaged (at least not immediately), as it's going to clock itself down automatically when the temperature gets critical.
    Just monitor the temperature with lm-sensors, if it stays below 60C under load you should be safe (more is probably ok as well, but I start to feel uncomfortable with more than that).

  3. #3
    Join Date
    Dec 2009
    Location
    Italy
    Posts
    176

    Default

    Thanks! I'll try as soon as I receive the last pieces and post here.

  4. #4
    Join Date
    Feb 2008
    Location
    Linuxland
    Posts
    5,104

    Default

    If possible, undervolt the Athlon; current AMD procs come with higher voltages than required to run, and so generate more heat than necessary.

  5. #5
    Join Date
    Oct 2007
    Posts
    1,275

  6. #6
    Join Date
    Mar 2009
    Location
    in front of my box :p
    Posts
    794

    Default

    Quote Originally Posted by kbios View Post
    Hi everyone. I'm building a media center with the following components:
    Motherboard: ASUS M4A785T-M
    CPU: AMD Athlon II 235e (TDP 45W)
    RAM: 2x 2 Gb kingston 1066 Mhz DDR3
    Case: Antec New Solution NSK2480 -EC

    In order to get a quiet system, I would like to limit the number of fans (especially smaller ones which are louder). So I wonder if I can use the stock Phenom II 940 heatsink I have (without fan) to cool the CPU. The case has two 12 cm fans, which should create a good airflow. Also the box won't have an hard disk (PXE boot).
    Is this possible? May it damage the CPU?

    Thanks in advance

    Hello

    I have an 45W TDP 4850e (the predecessor I'd say) and I have all besides the PSU and 2 ultrasilent casefans passively cooled. The CPU, the Radeon HD 3870 passively, the mainbaord chips. It is possible.

    I use the BTF-95 cooler (Butterfly, copper, looks nice and is still affordable). The cooler was also specified for much warmer (more TDP) CPUs at that time. It had a broad socket compatibility, came with mounting equipment for AMDs as well as intels. Installation was okay, though it needs some space.
    B.t.w. it is cold as ice on top. Even during compiling it stays cool (but the 4850e isn't a real hothead anyway). When I touch it now (during idling most of the time) the top feels like room temperature.
    So there are reserves left.

    look here
    www.zerotherm.net/eng/product/BTF95.asp
    I guess that one should also be able to cool a 65W TDP Athlon2.

    If you already have one that can cool a Phenom it should also be able to handle an Athlon.

  7. #7
    Join Date
    Dec 2009
    Location
    Italy
    Posts
    176

    Default

    @all: thanks for your replies!

    @curaga: thanks; however I've read somewhere that heavy undervolting may kill the CPU. Do you thing it is safe to try 1.2 - 1.15 V?

    @Adarion: thanks, but I'm already far out of budget, so I would try not to buy anything else. In the worst case, I'll keep the Phenom heatsink with a fan, which should be quieter than Athlon's one.
    Last edited by kbios; 01-26-2010 at 09:28 AM.

  8. #8
    Join Date
    Feb 2008
    Location
    Linuxland
    Posts
    5,104

    Default

    1.25 should be on the safe side, enough to run any Athlon II IMHO. Lower might work, but would need testing to be sure.

  9. #9
    Join Date
    Oct 2007
    Posts
    44

    Default

    I'm pretty sure you can't really kill a cpu by undervolting. You will start getting errors and crashes if you go to low though.

    You could probably also use software fan control via fancontrol to shut down the fan completely below a certain temperature.

  10. #10
    Join Date
    Dec 2009
    Location
    Italy
    Posts
    176

    Default

    http://www.lostcircuits.com/forum/vi...3&t=2703#p4963

    Okay I've found it. I really don't know...

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •