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> ATI HD4850 Overclockers' United, welcome to the Darkside overclocking!!

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leezhunkeat
post Aug 14 2008, 07:09 PM
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it can go higher? >_<
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wanakin
post Aug 14 2008, 07:26 PM
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default core clock is 625.
try free 2 or more ur case back slot & check ur case airflow.
or buy after market cooler.
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leezhunkeat
post Aug 14 2008, 07:39 PM
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i finally get to tweak my fan speed setting and keep it maintain at the desire clock. XD

I follow this instruction of tweaking the fan speed without playing with the 'blue-wire' brows.gif

*taken from http://forums.guru3d.com/showthread.php?p=...569#post2751569

» Click to show Spoiler - click again to hide... «


675/1020

» Click to show Spoiler - click again to hide... «


Hope this helps other HD4850 users out there!

This post has been edited by leezhunkeat: Aug 14 2008, 07:39 PM
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fesick
post Aug 15 2008, 08:58 AM
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bro leezhunkeat ,is ur gcard use stock cooler?the fan run at turbo speed orr..
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leezhunkeat
post Aug 15 2008, 12:42 PM
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yes, it's a stock cooler fan from Gigabyte HD4850. (3 years warranty) rclxm9.gif

i set the fan speed at 60%. a bit noisy. so i reduce to 55%. sounds pretty quiet.

i've tried 100%, it sounds like my HD4850 cooler is gonna explode anytime. haha

Added on August 18, 2008, 12:29 pmI've found a better software than CCC

It's call ATI tools tray. It's much more sophiscated and more tweaks can be done.

Here's the link http://forums.guru3d.com/showthread.php?t=270486

This post has been edited by leezhunkeat: Aug 18 2008, 12:29 PM
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uzairi
post Aug 19 2008, 05:14 PM
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QUOTE(^KamilskaZ^ @ Aug 13 2008, 04:13 PM)
the better is using atiflash in dos mode.low risky than using in windows or if it's doesn't boot in display.boot using onboard vga or pci vga and return flash using atiflash command follow by ur id card in dos
*


better in windows env because if u messed it up u can always reflash it back wink.gif

QUOTE(ben3003 @ Aug 14 2008, 09:24 AM)
anyone tried flashing with sapphire toxic one?
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how about if u try it first ? brows.gif

QUOTE(ben3003 @ Aug 14 2008, 07:06 PM)
y u download clock ur GPU clock to 600?
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That's Ati Powerplay in action.. If the card is idle, the clock speed will be throttled down, or in other words 2D mode.
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leezhunkeat
post Aug 19 2008, 11:29 PM
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This is base on Gigabyte HD4850 stock cooler. rclxms.gif

» Click to show Spoiler - click again to hide... «


This is my final result of OC with Ati Tools Tray.
rclxm9.gif
Stress GPU for 45 minutes sharp. No ARTIFACTS detected during the stressing period.

OC at GPU/MEM : 700/1125 with voltage of 1.120 thumbup.gif thumbup.gif

Hope this would be able to share my OC result with others. whistling.gif
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uzairi
post Aug 20 2008, 12:50 AM
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No screenies of the stressing period ?

Me myself managed to get 725/1120 stable with 1.2v bios soft voltmod.

Stress test done with AtiTool 0.27 and artifacts detected process were put at very sensitive scanning.
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leezhunkeat
post Aug 20 2008, 01:15 AM
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nice, are you using stock or aftermarket cooler?
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uzairi
post Aug 20 2008, 01:23 AM
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Aftermarket cooler and ive modded my pwm area too for better cooling smile.gif

how about u ?
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leezhunkeat
post Aug 20 2008, 07:18 AM
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i'm still using stock cooler as always. haha.....

if i honestly wants to use aftermarket cooler, i would rather get HD4870. xD
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ben3003
post Aug 20 2008, 08:58 AM
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uzairi wat card r u using? Mine at 720/1050 will give me screen turn into black and signal not detected plus sound looping prob.
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uzairi
post Aug 20 2008, 10:12 AM
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QUOTE(leezhunkeat @ Aug 20 2008, 07:18 AM)
i'm still using stock cooler as always. haha.....

if i honestly wants to use aftermarket cooler, i would rather get HD4870. xD
*


Im using watercooling on it brows.gif 4870 is just overkill with the DDR5 unless u have too much money to spend.

QUOTE(ben3003 @ Aug 20 2008, 08:58 AM)
uzairi wat card r u using? Mine at 720/1050 will give me  screen turn into black and signal not detected plus sound looping prob.
*


Im using gecube, 725/1125 mhz is the max i can do with it at 1.2v
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ben3003
post Aug 20 2008, 01:42 PM
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725mhz on core is ok, but 1125 on mem is like wow..

Added on August 20, 2008, 1:44 pmuzairi, u use rbe to change clock?

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uzairi
post Aug 20 2008, 02:42 PM
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Yea, at first i can only do 1050 on the mem, slowly i burn in them and increase it slowly with folding.

I use AMD GPU Clock Tool to change the clocks after i reached the 700mhz limit on the core, mem i use Ati's own overdrive.
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celciuz
post Aug 21 2008, 12:40 AM
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Guys, want ask ar, when i'm doing artifact scanning, I can hear my PSu making some weird noise.. like whistling or whinning? What does it mean? PSU overloaded? I'm using this huntkey 550w (ya i know.. not a branded or whatsoever). and running a gainward 4850 golden sample.

the sound only comes when I start the artifact scanning, happens in both ati tray tool and ati tool.
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anep
post Aug 21 2008, 12:49 AM
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able to OC my gc at 690/1183 using twin turbo.. but donno stable or not.. OC using CCC auto tuner.. how to test stability? i play GRID ok je..
so can i be on the list???

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uzairi
post Aug 21 2008, 01:18 AM
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QUOTE(celciuz @ Aug 21 2008, 12:40 AM)
Guys, want ask ar, when i'm doing artifact scanning, I can hear my PSu making some weird noise.. like whistling or whinning? What does it mean? PSU overloaded? I'm using this huntkey 550w (ya i know.. not a branded or whatsoever). and running a gainward 4850 golden sample.

the sound only comes when I start the artifact scanning, happens in both ati tray tool and ati tool.
*


That's the sound from ur gc if iinm.

QUOTE(anep @ Aug 21 2008, 12:49 AM)
able to OC my gc at 690/1183 using twin turbo.. but donno stable or not.. OC using CCC auto tuner.. how to test stability? i play GRID ok je..
so can i be on the list???
*


Use AtiTool 0.27 to check if its stable or not with the artifact scanner.
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celciuz
post Aug 21 2008, 07:07 AM
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QUOTE(uzairi @ Aug 21 2008, 01:18 AM)
That's the sound from ur gc if iinm.
*


From GC? err, I'm new to overclocking.. and my card is factory overclocked.. so this is normal? or abnormal? though it sounded like it was coming from the psu instead... hmm...
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ben3003
post Aug 21 2008, 07:56 AM
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i think if u say its from ur PSU, probably ur psu not good edi, becos at load, it stresses ur PSU also.
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