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How to overclock a 7850 past 1050MHz?

Alright!

The MSI wasn't on stock, oh well. I picked the Club 3D at a discount as a compentsation for having it on stock.

So far I haven't had any problems oveclocking past the 1050 and still have catalyst installed. Remeber to tick the Advanced option. :)

No problems with 1200 Mzh so far!
 
tuffluck said:
will the underclock be noticeable in something like GPU-Z. i.e. if you have it clocked at 1200/1450, will it stutter at times of a game and drop from that clock? or is the underclock more a voltage question than anything?

how many of you have the power settings set to anything beyond 0%? anyway to find out if it is needed?
Click to expand...

Sorry, I don't know. I just put it at 20% to be safe.
 
Prozel said:
Alright!

The MSI wasn't on stock, oh well. I picked the Club 3D at a discount as a compentsation for having it on stock.

So far I haven't had any problems oveclocking past the 1050 and still have catalyst installed. Remeber to tick the Advanced option. :)

No problems with 1200 Mzh so far!
Click to expand...

You're lucky. :) What voltage is that on?
 
Actually, I was a bit too fast. Right after I sat it to 1200 it crashed when I ran Lost Planet 2 benchmark. So now it's on 1100 to see how that goes. :)

MyUsualOnesUsed: Same as #11 on first page. :)
 
Well going by that voltage settings, you've got plenty of scope available. I'd say leave it at 1200 for the time being, and up the voltage in small increments at a time, say 0.02v, and see if you can get it stable benching heaven. A lot of ppl here , me included, have to set about 1.185v just to get 1150-1175 on the core. If you can get 1200 stable at around 1.15v-1.17v, I'd say you've got a goodun.

Don't forget to keep an eye on you temps, try to keep them from going higher than 70c on load, they'll probably go higher than that when gaming believe it or not. :)
 
Thanks. This my first time ever doing overclocks so I'll try to get as many observations as possible. Hopyfully getting it up to 1200 in time.

No problem with 1100mzh so far after an hour with Skyrim (Everything maxed + texture packs).
 
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Well, chuffed so far! Had it running stable for a few hours at stock volts at 1100/5800
Started at 1050 which gave an extra 200 in unigine 3
1100 gave an extra 90
What voltage do you think is a very safe 24/7 volt?
 
Anything up to 1.225V is fine as long as you can keep it cool enough. Most folks try and keep it at 1.2V or less.
 
Mirmo said:
Well, chuffed so far! Had it running stable for a few hours at stock volts at 1100/5800
Started at 1050 which gave an extra 200 in unigine 3
1100 gave an extra 90
What voltage do you think is a very safe 24/7 volt?
Click to expand...

Loadsa ppl have asked the same question and unfortunately theres no definitive answer regarding voltage. I would hazard a guess that as long as the voltage is below 1.2v and temps are good, you're ok, BUT this is only speculation on my part, 1.3V might be fine or no higher than 1.175 might be the limit.
The other aspect of this that you'll only using 1.2v (if thats what you've selected) when gaming, when in 2d mode the voltage drops right down, so effectively you're not gonna be using the high voltage 24/7, just in game.;)

Edit: Beaten to it.
 
pieman109 said:
Well going by that voltage settings, you've got plenty of scope available. I'd say leave it at 1200 for the time being, and up the voltage in small increments at a time, say 0.02v, and see if you can get it stable benching heaven. A lot of ppl here , me included, have to set about 1.185v just to get 1150-1175 on the core. If you can get 1200 stable at around 1.15v-1.17v, I'd say you've got a goodun.

Don't forget to keep an eye on you temps, try to keep them from going higher than 70c on load, they'll probably go higher than that when gaming believe it or not. :)
Click to expand...

This.
 
Well it seems pretty stable at 1200/5800 with 1.155 volts but to be honest I don't see the difference between 1100 and 1200 core being worth it. Still, a brilliant card for the price. Around 30% clock increase with only .02 volt increase at the price OcUk were selling? Bargain.

Might push it out of curiosity at some point though lol.
 
1200 is worth it if you can run it stable, really helps in GPU intensive games like BF3.
 
Mirmo said:
Well it seems pretty stable at 1200/5800 with 1.155 volts but to be honest I don't see the difference between 1100 and 1200 core being worth it. Still, a brilliant card for the price. Around 30% clock increase with only .02 volt increase at the price OcUk were selling? Bargain.

Might push it out of curiosity at some point though lol.
Click to expand...

Sounds like you have an excellent chip. I reckon it would be fine at 1250.
 
So further testing with 1100 mhz resulted in a freeze while playing Skyrim (with Texture packs) so now I'm back to 1050. I honestly dont mind if that's limit, as longs as it performs well I'm happy.
 
Prozel said:
So further testing with 1100 mhz resulted in a freeze while playing Skyrim (with Texture packs) so now I'm back to 1050. I honestly dont mind if that's limit, as longs as it performs well I'm happy.
Click to expand...

Just add a touch more voltage. It must have been pretty close to stable, add an extra 0.01V and give it another go at 1100. I'd honestly be suprised if you can't get 1100 stable at reasonable volts, and i'd imagine you can get 1150 at under 1.2

You're fine all the way up to 1.2V really as long as you can keep it cool enough.
 
Dave777 said:
Is there a consensus on which brand does best. Looks like Sapphire does well?
Click to expand...

Luck of the draw really, there have been great and duff cards from all brands.

What helps is having a better cooler so you can put more volts through without the heat getting too much.

The VTX/Club3D's have problems there as their stock coolers aren't up to the task of lots of extra volts.

The Sapphire and MSI's handle it better as they have big uprated coolers, so people can put more volts through to get higher OC's without the cards getting too hot.

Right now if I were buying I'd go for the HIS card on special for £185, improved cooler, and a great price and you've just as much chance as hitting a high OC as any of the other brands.
 
HeX said:
Just add a touch more voltage. It must have been pretty close to stable, add an extra 0.01V and give it another go at 1100. I'd honestly be suprised if you can't get 1100 stable at reasonable volts, and i'd imagine you can get 1150 at under 1.2

You're fine all the way up to 1.2V really as long as you can keep it cool enough.
Click to expand...

Aight, I'll give it another go. But my rig is tucked pretty good away so the air ventilation isn't the best. :)

And second that regarding Club3D noise. At least it isn't any worse compared to my 5850 card.
 
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Hey have you guys figured out the optimal memory speed for these cards yet?

Here are the results of my testing:

- with my memory at 4400mhz, I get 29.2fps in Heaven at 1280x1024 maxed out with 8xAA

- with my memory at 5000mhz, I get 30.5fps at the same settings

- with my memory at 5600mhz, I get 31fps at the same settings

I will confirm this with more benchmarks when I can.

For now I am lowering my memory clock, especially if there is a power threshold that is holding back my core overclock.

What's interesting is that there is a 5% performance improvement from 4400-->5000, but then a 1% improvement from 5000-->5600.

My core is at 1200mhz.
 
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