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Overclocking the 5850?

reflux

reflux

reflux

Soldato
Joined
15 Nov 2007
Posts
13,177
Location
Hertfordshire
What are people using to clock their 5850s? Mine's maxed out in CCC (775/1125 mhz) and won't go higher in anything else other than AMD GPU Clock Tool. But that seems to break PowerPlay and runs it at the overclocked frequency the whole time, which I don't want to do.

I've heard about people flashing another vendor's bios to their cards to raise the CCC overclock limits...is this still the only way to go about getting higher clocks and PowerPlay together?
 
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am also interested in this, cranked it up in ccc and it laughed at me and carried on... I have been hearing good things about msi afterburner, mind you ive only had mine for 2 days so not had loads of time to play yet.

Edit: I also hear that the Asus card has higher ccc values... is it really worth flashing?
 
all ya need is msi afterburner to overclock ya card once you have installed it edit the CFG file with notepad and change enableunofficaloverclocking from 0 to 1 then that unlocks it for you hope that helps.
 
dan7777 said:
all ya need is msi afterburner to overclock ya card once you have installed it edit the CFG file with notepad and change enableunofficaloverclocking from 0 to 1 then that unlocks it for you hope that helps.
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Ah thanks, found a guide here:

http://www.overclock.net/ati/641299-guide-enabling-unofficial-overclocking-msi-afterburner.html

Unfortunately I still can't get the card's 2D speeds working - even when I create a 2D profile in Afterburner and assign it with the lowest clocks it provides - 545/750 - it still runs at full overclocked speed :(
 
ive never overclocked a gpu before, but using ccc it looks stupidly easy, what sort of temps are on the high side for a 5850? and what sore of core / memory speeds are easy to obtain, also how do you work out what the speeds will be in game from the idle speeds?
 
will0812 said:
ive never overclocked a gpu before, but using ccc it looks stupidly easy, what sort of temps are on the high side for a 5850? and what sore of core / memory speeds are easy to obtain, also how do you work out what the speeds will be in game from the idle speeds?
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I just clocked mine to the max CCC allows - 775/1125. Idles at 30-40c and loads at 70-80c.
 
will0812 said:
ive never overclocked a gpu before, but using ccc it looks stupidly easy, what sort of temps are on the high side for a 5850? and what sore of core / memory speeds are easy to obtain, also how do you work out what the speeds will be in game from the idle speeds?
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should be easy get 1000 core memory 1200-1300 maybe.
 
It's easy because it's an easy tool for beginners, if you want to go extreme, get the AMD GPU Clock tool.
 
I overclocked my card using dirt 2 benchmark to check performance, my card managed 1030/1225 @1.225v. With the fan fixed at 50% which is a little loud to be fair, but card temps never went over 65c.

Although the overclocking is fun and all to see what it can do, in all the games i play, at my native resolution of 1680x1050 there is no need for anything above the max ccc overclock.

This thing really is a powerful card, ive only had it a few days but in the games ive played, fallout 3, borderlands, l4d2 and Dirt2 it feels so much nicer than my previous cards.

No issues so far either which is also good, The driver still has some issues when you rdp into the machine then log back in locally but thats just the nature of the beast.
 
I'm running at 850/1150. Cba taking it higher than that because I'll have to up the fan speed and it's noisy enough atm. Bit disappointed with the performance; whilst I am running a load of visual mods in GTA 4 it still chugs. DiRT2 is only just over what I would consider playable too, and then there's Crysis which ain't brilliant.

Maybe I'll buy another and have some CrossFire fun. Been a while.
 
What res are you running?

I'm at 900/1200 at the mo and it's running Dirt2 and Crysis really well at 1920x1080. Dirt2 looks the nuts on the projector. :)
 
whats interesting is I ran a bench of dirt at stock and then at each interval all the way up to 1030 where i then decided that I didn't want to break my new toy.

To give an idea, at stock 1680x1050 with high settings (not ultra) and 4xAA I was getting low fps count of 44, and highs of 54, with the card at its max overclock those figures were lows of 68fps and highs of 74. To get an idea these are similar if not slightly quicker results than a stock 5870

I noticed that on the memory side of things even a step over 1225 would cause jumping in the graphics and slow downs in fps, I guess the ECC code is whats causing this. Without any voltage increase on the vram I don't think it will go any further, I guess 1225 is the max overclock on the memory for me. Either way overclocks on the memory don't seem to relate to much in terms of real world performance.
 
VinceB1 said:
Either way overclocks on the memory don't seem to relate to much in terms of real world performance.
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I'm glad you think that as any kind of memory overclock seems to make my 5850 unstable, causing MW2 to crash/freeze after playing for half an hour or so. Drop it back to 1000 and all is fine.

I'm seriously thinking about changing my PSU. I had to increase the vcore from 1.15v to 1.175v to get it to pass a run of the unigine bench when going from 900/1100 to 900/1200. It shouldn't affect the memory clock so I wondered if the PSU was struggling to supply enough power to the card when overclocking. My CPU overclock, that was stable for months at 3.8ghz, has started to become unstable and I've had to drop that back too.
 
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