Overclocking 5750 (mobility 5850) - Results inside

Discussion in 'iMac' started by henrikrox, Aug 6, 2010.

  1. henrikrox macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #1
    EDIT; Post #9, #12, #21 is updated with more benchmarks / more clocks, let me know of other games to test


    So i decided to do a light overclock of the 5850 today.

    My game of benchmark is Starcraft 2. I have used a singleplayer mission with alot of stuff going on in the beginning. I have used fraps to find the avg, max and minimum fps of the first 60 second of that mission.

    TEST 1: (STOCK CLOCK) (628 core clock / 1000 memory clock)
    Frames: 2926
    Time (ms): 60 000

    FPS
    Min Max, Avg
    41, 61, 48.767

    Since the test only lasted 60 seconds the temperature only reached 58 degrees Celsius. However im using fans at 1800 1800 1600 rpm, while they are at stock 1000 1000 1000 rpm.

    TEST 2: (700 core clock / 1050 memory clock)
    Frames: 3328
    Time (ms): 60 000

    FPS:
    Min, Max, Avg
    46, 68, 55.467

    Remember this is a very light over clock but the difference is about 7-8 fps which is good. One thing weirds me out, that the temp still is the same. Okay i didnt bencmark long but it still hovers around 60 degrees. Fans are still the same as test 1.

    So thats one test out of the way. The gpu didnt break a sweat.

    Now begins gpu stress testing to notice how far this card can go.

    also for those are interested gpu-z temp readings are as attachments so you can check out the temps and clocks.
     

    Attached Files:

  2. GyroFX macrumors 6502

    Joined:
    Jan 14, 2002
    Location:
    Los Angeles and NorCal
    #2
    good to see the progress. You and saschke are some of the first ones to post up info regarding OCing 5850. So far so good. Saschke pushed it a little further but i'm sure you guys have a lot of room with fan controls added.

    http://forums.macrumors.com/showthread.php?t=986620
     
  3. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #3
    Yes, there is alot of room left, i mean with the overclock i did the fans are still running at 20% of what that are capable off, so it can be pushed. That i know
     
  4. Felias macrumors member

    Joined:
    Jul 29, 2010
    Location:
    Germany
    #4
    Groovy, you're one of the first who is doing this officially. promising results already, i am anxious to see what's possible (should be waaaay more)
     
  5. GyroFX macrumors 6502

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    Jan 14, 2002
    Location:
    Los Angeles and NorCal
    #5
    i'm wondering if bumping the fan up creates a lot of noise in an iMac...?
     
  6. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #6
    Going max on all fans, hdd, cpu, and stuff, makes it sound like a airplane
     
  7. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #7
    Play the ai for one game, then come back and use your player cam to get very accurate fraps benchmarks. You can adjust the fraps benchmark to last as long as you want.
     
  8. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #8
    Didnt think of that TMraven, awesome tip, its late here in norway now, so ill do it when i wake up in a couple of hours.

    Going to a third clocking test aswell,

    so stock, overclock (mild) and overclock (medium)

    will be exciting to see.
     
  9. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #9
    5 min fraps benchmarks test.

    Took a game vs the computer.

    Watched the replay, and fast forward to about 5 min into the game before beginning benchmark. And i used player cam, so the benchmark is exactly the same when running stock and OC.

    All details are on high, and some ultra, all at native resolution. i have the i5 quad core, 4gb ram.

    BENCHMARK 1 (STOCK CLOCK - 628 core clock - 1000 memory clock)

    Frames, Time (ms), Min, Max, Avg
    3673, 300000, 46, 64, 58.217

    BENCHMARK 2 (700 core clock - 1050 memory clock)

    Frames, Time (ms), Min, Max, Avg
    3939, 300000, 54, 76, 65.650

    Kinda awesome considering how little it has been clocked, and the potential it has.

    Im Loving it

    Edit, i have tried with saschke clocks and the results are under

    BENCHMARK 3 - 750 core clock - 1075 memory clock)

    Frames, Time (ms), Min, Max, Avg
    4067, 300000, 57, 78, 68.783

    We are now seeing a 10-13 fps difference over stock clocks.

    Which is great, temps never exceeded 71 degrees. they were running at 2000rpm / 2000rpm / 1500rpm. Still not making any loud noises. Just a hum in the background.


    BTW:

    If you have any other requests for games, please let me know, ill do my best to cover them and see what the difference with STOCK / OC is at those games. Sorry for my crap english today, i kinda stayed up all night and didnt go to bed
     
  10. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #10
    What's the max temp you get for gpu when odd fan is maxed, and you've been playing starcraft2 for a good hour or two?
     
  11. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #11
    Never hadd the ODD fan maxed, far from it, havnt seen the need for it yet, when playing at OC clocks before, i played about 2 hours of campaign, max temp was 78.

    The ODD fan has been around 30-40% max.

    However i just feel its weird how cool this computer is. I mean, the cpu is now idling at 27 degrees. Thats kinda insane. didnt know the i5 was so much more cooler then the i7. Also the gpu is idling at 40-45 which is also kinda nice.
     
  12. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #12
    One last benchmark :p lol this is hard to put away

    Anyways here is the 3DMark Vantage peformance between stock and oc clocks for those who are into that.

    I just have the trial version, but still you get the idea.

    here are some pictures

    STOCK CLOCK (628 / 1000)

    [​IMG]

    GPU SCORE: 7224
    GPU TEMP (max): 61 degrees celsius



    OC CLOCK (750 / 1075)

    [​IMG]

    GPU SCORE: 8384
    GPU TEMP (max): 68 degrees celsius


    Over 1000 score difference :), while watching the gpu demos, the oc ran much more smoother, and was pushing alot more fps. and i still cant believe those temps i get by increasing the fans just a bit. Check Macfan in the picture to see what im running at, and what the potential is.

    Macfan is awesome to control temps, real temp for cpu and gpu-z for clock speed / gpu temp.
     
  13. vandozza macrumors 6502a

    vandozza

    Joined:
    Jun 14, 2006
    Location:
    Australia
    #13
    I'm guessing this is also possible on the 5670?

    I'd like to try this in an i3 with the 5670. Could you link me to the tools that you're using. I've got Windows 7 64bit running in BootCamp.
     
  14. GyroFX macrumors 6502

    Joined:
    Jan 14, 2002
    Location:
    Los Angeles and NorCal
    #14
    very promising results. There doesn't seem to be a huge difference between your clocks and saschke's clocks. Maybe somewhere in between will be quit decent
     
  15. KennyW macrumors newbie

    Joined:
    Sep 5, 2007
    #15
    Any overclocking tools under OSX ?

    Is there any visual difference with the 10-13fps increase for the games played ?
     
  16. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #16
    I think he's using MSI Afterburner and Mac Fan

    @OP: Nice results and great temps. There is still potential as you didn't even exceed 71c
     
  17. saschke macrumors 6502

    Joined:
    Feb 2, 2008
    #17
    Very nice work Henrik!
    Somehow MacFan isn't running for me. Will try later...

    I think a OC to 750 / 1075 is perfectly fine, we just have to gauge how far we
    can go without getting graphic errors :)

    @ADMIN: Can we merge this thread and that one!?


    EDIT:
    Just to let you guys know - I've been running some tests with the OC settings (750/1075) yesterday. I'm really not easy to please framerate-wise so I'd like to list how some games run according to my perception. I never activate AA or AF:

    Crysis Warhead: 1920*1080 -> GAMER -> PERFECTLY SMOOTH /// FULL2560 -> GAMER -> STILL ALLRIGHT
    Modern Warfare 2: FULL2560 -> MAXXED OUT -> PERFECTLY SMOOTH
    StarCraft 2: 1920*1080 -> MAXXED OUT -> PERFECTLY SMOOTH /// FULL2560 -> MAXXED OUT except shaders to high -> PERFECTLY SMOOTH
    Bad Company 2: 1920*1080 -> MAXXED OUT -> PERFECTLY SMOOTH
    PES2010: FULL2560 -> MAXXED OUT -> PERFECTLY SMOOTH
    Splinter Cell Conviction: 1920*1080 -> MAXXED OUT -> PERFECTLY SMOOTH /// FULL2560 -> MAXXED OUT -> STILL ALLRIGHT

    hope this helps..
     
  18. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #18
    Macfan is CMD, so the files you downloaded wont do anything. You have to start cmd as admin, then navigate to the macfan folder using cd and cd.. commands.
    When you are in the macfan folder, just type Macfanx64.exe and see the fans you have, and what they are running at, and what their minimum and maximum rpm is then change accordingly. To change the rpm, just type macfanx64.exe 2000 2000 1500. That sets fan 1 & 2 to 2000 rpm, and fan 3 to 1500rpm. See the pictures for better explanation

    Great work with the games you tested, its really a big difference playing games with stock clock and OC clock. Nice to see crysis running great. And yes, im very picky about fps aswell, and i really do notice the 15+ fps boost it gives to starcraft 2 in large battles etc. its just great.
    i think 750 / 1075 is the sweet spot. I think 800 / 1100 is easily achievable aswell. But then the fan needs to run higher and the imac becomes a bit noisy.
    However we got to remember that this cards is made for laptops, and the imac has so much better cooling then a cramp laptop. So its much safer to overclock

    Btw, anyone remember the name of the GPU stress testing tool, i can only remember prime, but thats for cpu.
     

    Attached Files:

  19. Hellhammer Moderator

    Hellhammer

    Staff Member

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    Dec 10, 2008
    Location:
    Finland
    #19
    FurMark
     
  20. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #20
    Thanks will do some stress testing now to see how high the temps get on stock vs OC.

    Edit; its running now, i will let it run for about a half and hour on both clocks then compare. pictures inc in an hour or so
     
  21. jpjandrade macrumors member

    Joined:
    Mar 17, 2010
    #21
    Just want to thank you guys for doing this. It's very promising results. Really interested in more data!
     
  22. henrikrox thread starter macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #22
    So i got to stress test the GPU at stock and OC clocks. Here are the results


    Things to note:
    * The fans are running at the exact same speed when doing stress testing at stock and OC.
    * The temps maxed after about 8-9 minuets, then stayed at that level through the rest of the testing period. Therefor i didnt see the point on letting it run for hours. Since the temp didnt change after the 9 min mark.
    * Notice the difference in max,min,avg fps on the two pictures.
    * Notice how small the temp difference is.
    * Fans are not running high, and its not noisy, which means there is alot of room to play with.
    * I will test Crysis benchmark tool later tonight / tomorrow. To really get the idea what the overclock does to games that require a lot of GPU power.
    * Next time, i will do 3 tests, with one being even higher then 750/1075. Probably around the 800/1100 mark.


    GPU stress test 1 - Stock clocks (628 / 1000)

    Runtime: About 30 min

    [​IMG]

    FPS:
    Min: 21
    Max: 58
    Avg: 38

    Max Temp: 70,5 C


    GPU stress test 2 - OC clocks (750 / 1075)

    Runtime: About 30 min

    [​IMG]

    FPS:
    Min: 30
    Max: 67
    Avg: 44

    Max Temp: 74 C
     
  23. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #23
    Nice, thank you! Hmm, 5% temperature increase but 16% performance increase (looking at the average FPS), that's amazing. Keep it going! ;)
     
  24. saschke macrumors 6502

    Joined:
    Feb 2, 2008
    #24
    Great work Henrik! I will do some more testing tonight, too.
    Regarding MacFan - thanks for the explanation, maybe this will help others. I've done exactly that the first time I've tried to set fan speeds. Didn't work. Anyhow, I will try again later tonight :)
     
  25. Snowcake macrumors regular

    Joined:
    May 18, 2010
    #25
    You know that the mobile 5850 is based on the desktop 5770 which operate on 850 MHz, so technically you should reach 850 MHz no problem.

    The question is the cooling.
     

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