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Overclock.net - Overclocking.net > Graphics Cards > ATI | |
HD4850 Memory past 1100? Here's how.
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LinkBack | Thread Tools |
08-05-08
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#1 (permalink) | ||||
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4.0ghz
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HD4850 Memory past 1100? Here's how.
When I first got my HD4850 - I couldn't Overclock the memory past 1100Mhz.
Well now I know how - and I will let you in on a secret that will add 10-12Gb/s to your memory  [Note- Apparently this works well for the HD4870 too.] First things first - Open CCC [Right click on your desktop]  Once In Catalyst Control Center - Unlock your card's overdrive and proceed to Auto-Tune.  Select HD4850 and click "run" - You should see this:  Let Auto-Tune take its time making sure everything is stable. My resulting clock - 690/1180  With GPU.Z in the shot  Now let me show you how much you have gained - STOCK  Auto-Tuned  63.6Gb/s to 75.5Gb/s. Quite an improvement Conclusion - NCspecV81 and I have confirmed that CCC slightly bumps the voltage up on the memory when it autotunes. This works out well for us - as little effort leads to big gains. Note that your card may clock higher or lower than mine and If it is unstable at what CCC Auto-Tunes - Take it down by 10MHz increments until it is stable. Happy overclocking 
Last edited by Kamikaze127 : 08-06-08 at 07:32 PM Reason: New information. |
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08-05-08
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#2 (permalink) |
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4.0ghz
Join Date: Mar 2007
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According to my DMM voltage is slightly bumped when using autotune on the memory. Mine finally settled at around 2.0v's up from 1.85v's.
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08-05-08
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#3 (permalink) | ||||||||||||
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AMD Overclocker
 
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awsome, i shall let it autotune me card too
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08-05-08
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#4 (permalink) | |||||
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4.0ghz
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Quote:
Let me know how it goes.
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08-05-08
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#5 (permalink) | |||||||||||||
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AMD Overclocker
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Quote:
 yeah autotune works http://www.techpowerup.com/gpuz/72hme/ (PROOF) 
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08-05-08
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#6 (permalink) | ||||||||||||
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Overclocker
 
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I am guessing it does the same for the 4870 as well? I can't get my memory past 1050 with artifacting.
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08-05-08
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#7 (permalink) | ||||||||||
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ATI Enthusiast
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Quote:
nice find,repped
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there are only 10 kind of people in this world, those who understand ternary, those who don't, and then those who don't give a damn. I see in Fight Club the strongest and smartest men who've ever lived. I see all this potential, and I see squandering... old man look at my life, I'm a lot like you. Ati Tray Tools vs CCC
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08-05-08
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#8 (permalink) | |||||||||||||
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PC Gamer
 
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This is mine...
GPU-Z Validation 690/1138 Something that interests me about the voltage is, when you change the fan speed in the xml file, there are voltage targets in there.. I wonder if changing those changes the voltage to your card, or if they're just there for the sake of being there
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Last edited by adam144 : 08-05-08 at 12:28 PM |
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08-05-08
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#9 (permalink) | |||||
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4.0ghz
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Quote:
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08-05-08
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#10 (permalink) | |||||||||||||
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PC Gamer
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Rofl, I artifact tested mine in ATI Tool and as soon as I clicked the button, kablam, dozens of artifacts on the cube
Gonna have to step back a little 
__________________
[center][FONT="Verdana"]Upgrades - Team Elite 4GB PC-6400 - installed! - Sapphire HD4850 512mb - installed! - 500gb 7200.10 - installed!
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