Sapphire Radeon HD 4850 X2 with a Perfect GPU Cooler? Not Really…

Sapphire Radeon HD 4850 X2

The chaps at Generation3D have tested Sapphire’s Radeon HD 4580 X2 and after all usual 3D tests that all websites do (3DMark, Crysis and so on), they pushed the graphics card temperature with FurMark:

Radeon HD 4850 X2 GPU temperature

The cooling system of the Radeon HD 4850 X2 seems to perform a very good job keeping GPU temperature low. But, there is a but, the GPU cooler is noisy. Pity…


  • Fletcher

    Radeon 4850 X2 Fan Noise Problem Solved

    I purchased the Radeon 4850 X2 2GB card 3 days ago (upgrade from nVidia 8800 GTS OC) and nearly sent it back due to the
    ridiculous noise it makes.

    Having scoured the internet for a solution (editing profiles, downloading new bios updates etc) I came to the conclusion that
    I was going to have to put up with it.

    It is true you can set the fan speed to 20% via the Catalyst Control Centre, however this is actually louder than automatic,
    which seems to run at 12%.

    At 3am last night however, I found a way which gives you the best of both worlds; superb gaming performance which is cooler than before but also non-gaming noise levels that are so low, my hard disk makes more noise 

    The main reason for the excessive noise, is ATI/Saphires’ over conservative and inefficient approach to cooling their card. With the method listed below, I am able to get an idle temperature of 42 degrees celcius and a load temperature of 62 degrees celcius without spending a penny. My idle fan speed is 2% and anything above 50 degrees celcius has a % increase in fan speed relative to the temperature of the card (as it should be).
    To achieve this, just follow these steps:
    1. Download and install ‘Radeon Bios Editor’ (RBE)
    2. Download and install ‘ATI WinFlash’ […] 0.1.7.html
    3. Run RBE and click the ‘Acquire/flash’ icon at the bottom
    4. Locate your installed ‘ATI WinFlash’ software by clicking browse at the top right (ATIWinFlash.exe)
    5. Click ‘Analyze’ at the bottom to refresh the attached graphics card list
    6. Select the first adapter in the list and click ‘Acquire Bios’ at the bottom
    7. The Bios will be load into the RBE program
    8. Click ‘Save Bios’ so that you have a backup copy of the adapters default bios settings (safety first)
    9. Select the ‘Fan Settings’ tab at the top
    10. Select the ‘Use transfer function (recommended)’ button under ‘Fan throttle control settings’ heading
    11. Change the following:
    ‘Tmin (C)’ to 50
    ‘Duty cycle min (%)’ to 2
    ‘Hysteresis (%)’ to 10
    ‘Tmin hysteresis (C)’ to 4
    12. Select the ‘Additional features’ tab at the top
    13. Select the ‘Fix/already fixed’ button under ‘Fix spin up bug’ heading
    14. Click the ‘Acquire/flash’ button at the bottom
    15. Click the ‘Flash Bios’ button at the bottom (this will apply the changes listed above)
    16. It may ask you to reboot, but say ‘No’ if you have the other GPU adapter to update aswell
    17. Repeat points 6 to 15, but selecting the second adapter
    18. When you click ‘Flash Bios’ on the second adapter, it may notify you the product number is different, but continue anyway
    19. Once updated, say ‘Yes’ to rebooting
    20. Once rebooted you should notice a strange sensation of your ears going back to normal

    I use a ‘Tmin (C)’ setting of 50 degrees celcius, because this is the level my card temperature sits below when idling. This level may be different for your system, so you may need to experiment.
    You will have noticed than when you were inputting the numbers, the graph on the right also changes. With the figures selected above you will get a linear increase in fan speed corresponding to a similar increase in card temperature after 50 degrees celcius (the graph can be manually adjusted to suit your needs).

    I hope this guide has been useful but please note any changes made your cards Bios is at your own risk.

  • alan

    fletcher, you have earned some damn good karma for this. Did the above and my ears have stopped bleeding….. you deserve a medal mate.


  • Kangaxx

    THANK YOU! My hero! You’ve saved my ears aswell!