Better thermal paste on HD4800 series does wonders!

Discussion in 'Videocards - AMD Radeon' started by RejZoR, Jul 1, 2008.

  1. RejZoR

    RejZoR Ancient Guru

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    GPU:
    Sapphire HD4870 Silent
    Radeon HD4850 + Zalman VF-950 (my own custom mod)

    Just one hint for all the HD4800 users. If you want to boost up your card without trashing half of your piggybank into it, then read on.
    All you need is some courage to take heatsink off your brand new card and some high grade thermal grease.

    For todays "show" i've used Akasa ProGrade+ 5022 thermal grease.
    It's not all that expensive silicon paste with incredible performance.
    Results?

    Idle didn't changed much, maybe around 1-2°C at most. However the other end changed greatly. Full load using RTHDRIBL resulted in a rock steady 88°C using 660MHz core). Stock paste at same clock reached around 92°C.
    Need more. I've clocked the core to whooping 700MHz, the max Catalyst allows at this point. Crysis and CS:S started artefacting pretty fast even at 670MHz and locked up to desktop at 690MHz. Now, it's perfectly stable and no artefacting at 700MHz.

    Results:
    Idle = 80°C
    Full load @ 660MHz core (stock grease) = 92°C
    Full load @ 700MHz core (Akasa ProGrade+ 5022) = 88°C

    So do your card a favor and give it some high grade thermal treatment.
    They deserve it!
     
    Last edited: Jul 2, 2008
  2. JFlash

    JFlash Member Guru

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    Are you sure that's the only thing you've changed in your setup?
     
  3. MileHighMilitia

    MileHighMilitia Master Guru

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    GPU:
    HIS HD4850 + TT DuOrb 700/1135
    ThaTS not wonders.... Thats a step in the right direction.
     
  4. RejZoR

    RejZoR Ancient Guru

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    Apart from changing thermal compound and increasing clocks, yes.
     

  5. mcharj11

    mcharj11 Banned

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    GPU:
    BFG GeForce GTX 280 OC
    Never thought that the 4800's were that hot, my 280 is in the 40's idle and anything from 60-80 in games.
     
  6. cowie

    cowie Ancient Guru

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    there that hot cus ati saved alot of money on the fan
    ot
    well it helps but still high temps best for high overclocks to put a better heatsink/fan on it.

    but all in all just reseating the heatsink helps and is a fast cheap way to getting better temps
     
    Last edited: Jul 1, 2008
  7. RejZoR

    RejZoR Ancient Guru

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    Well, i had this in mind but the project was postponed for now...

    Zalman VF-950 :banana:

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  8. ottoyu34

    ottoyu34 Master Guru

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    that looks nice
     
  9. cowie

    cowie Ancient Guru

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  10. RejZoR

    RejZoR Ancient Guru

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    How do you cool the memory chips and PWM part of the card? With heat sinks? Or are they just naked and cooled as much as the air simply goes through them?
    I have this custom VF-950 but i dont have anything proper to be attached to the memory and PWM chips.
     

  11. cowie

    cowie Ancient Guru

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    you can use the little ones that come with most vga sinks plus you can buy more just line them up on PWM parts.
    umm...3 on first part and 2 sinks on the parts closer to the end over v-reg.
    ram does not run as hot since i have the finger chopper fan ouch...
    but if you dont care about your stock fan you can cut that area of the heatsink usein hacksaw with fine teeth use the two screws to hold it in place with the stock tharmal pads even
    if you really want to go nuts cut out the whole core area and bolt it on before you mount the zalman
    or you can just cut the blue wire to give it 100% with stock fan.
     
    Last edited: Jul 2, 2008
  12. FlawleZ

    FlawleZ Ancient Guru

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    Your card idles at 80C!?!?! That's RIDICULOUSLY hot for idle!

    Good results for your load temps though!
     
  13. Lowteckh

    Lowteckh Member Guru

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    GPU:
    Sapphire 4850 @ stock
    Not his card, all stock 4800s.
     
  14. cowie

    cowie Ancient Guru

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    not all of them run that hot mine idled closer to 58c in a coolish 67f room
    but 85c was np to get at load
     
  15. RejZoR

    RejZoR Ancient Guru

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    I'll report back when i install that mofo VF-950 cooler :D
    It seems i'll be installing it after all...
     

  16. Fahim

    Fahim Member Guru

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    I will report mine tomorrow once i get my 4850 in hand. I am planning on applying Arctic Cooling MX-2 on it.
     
  17. aircool

    aircool Don Aircooleone Staff Member

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    Please do post your findings, because I can see this becoming handy myself since I got one spare.

    Thanks mate.
     
  18. RejZoR

    RejZoR Ancient Guru

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