is this true of the 5850 and 6850s OC potential?

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daRkKon

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Dec 12, 2005
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i just looked at two overclocking reviews of both the 6850, and the 5850

both ooverclock to around the same ~1ghz core... but only 1200mhz memory on the 5850, while the 6850 was able to go 1400mhz memory with the bios unlocker plus voltage tweak

card owners: is this true of their overclocking potential?
 
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RavenSEAL

Diamond Member
Jan 4, 2010
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The HD6850 is relatively new and the few people that have it don't seem relatively interested in the OCing capabilities. I myself just ordered one and was hoping to read some overclocking reviews but there are very few.
 
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RavenSEAL

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Jan 4, 2010
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RavenSEAL

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Jan 4, 2010
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I would go with the HD5850, performance is higher at stock speeds and you have a decent potential to overclock.
 
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RavenSEAL

Diamond Member
Jan 4, 2010
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The only problem i see with the HD5850 is the brand, PowerColor isn't necessarily a brand i would trust with my money...
 
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Kenmitch

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Oct 10, 1999
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Can only speak for the 5850 but I came to the conclusion temps on core and vregs limit the overclock. Those vregs get very hot once juiced up!

Mine has full water block and has no issues running at 1025 core 1300 memory. Mine is ref design flashed with hacked 5870 bios. I think I'm able to do 1300 mem due to the xtra little bit of voltage the 5870 feeds the mem.
 
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Rifter

Lifer
Oct 9, 1999
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RavenSEAL said:
The only problem i see with the HD5850 is the brand, PowerColor isn't necessarily a brand i would trust with my money...
Click to expand...

I have used a few powercolor cards for builds over the last year or so and i think their quality has improved over the crap they produced 10 years ago. That said i cant comment specifically on their 5850 model. Havent had to RMA a card to them so cant comment on customer service.
 
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Jhatfie

Senior member
Jan 20, 2004
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Earlier reference model 5850's were well known to overclock very well, often into the 1000+ mhz range with added voltage. However the 5850's sold mostly these days are non reference designs that cannot increase voltage. However, I personally have 3 such later models and all three come close to or slightly exceed 900mhz on the core, which still is a good boost over the stock 725Mhz and above stock clocks of a 5870.
 
GaiaHunter

GaiaHunter

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Jul 13, 2008
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Rifterut said:
I have used a few powercolor cards for builds over the last year or so and i think their quality has improved over the crap they produced 10 years ago. That said i cant comment specifically on their 5850 model. Havent had to RMA a card to them so cant comment on customer service.
Click to expand...

+1.

Their PCS+ series are pretty decent.
 
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bmadd89

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Sep 22, 2010
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Im running a gigabyte 6850 and im currently running it at 1000/1150. Temps get to about 65c at load gaming and a bit higher under furmark.

I can comment on the 5850 but so far my 6850 is powering along well.
 
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Deanodarlo

Senior member
Dec 14, 2000
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As previously mention, good chance of getting 1000 on the core.

1400 on the mem sounds way too high - more like 1150, 1250 if you're very lucky. If anyone did get to 1400 and thinks its stable, I bet it's slower due to error correction.
 
flopper

flopper

Senior member
Dec 16, 2005
739
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one of my 6850 did 970mhz the other 1ghz.
draw of luck.
did run them at 940mhz and smoked the games I played.

waiting game for software tools for 6950 ;)
 
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daRkKon

Member
Dec 12, 2005
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Deanodarlo said:
As previously mention, good chance of getting 1000 on the core.

1400 on the mem sounds way too high - more like 1150, 1250 if you're very lucky. If anyone did get to 1400 and thinks its stable, I bet it's slower due to error correction.
Click to expand...

a couple review sites that overclocked the 6850 got it to 1400 with the voltage tweak.
 
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RavenSEAL

Diamond Member
Jan 4, 2010
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bmadd89 said:
Im running a gigabyte 6850 and im currently running it at 1000/1150. Temps get to about 65c at load gaming and a bit higher under furmark.

I can comment on the 5850 but so far my 6850 is powering along well.
Click to expand...
Is that stock voltage?
 
MrK6

MrK6

Diamond Member
Aug 9, 2004
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See sig, both cards overclock well. The 5850, however, will be much faster at 1GHz+.
 
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Deanodarlo

Senior member
Dec 14, 2000
680
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daRkKon said:
a couple review sites that overclocked the 6850 got it to 1400 with the voltage tweak.
Click to expand...

Fair enough, I may be wrong. Review sites sometimes get specially selected models with higher spec memory, or a 6870 card with stream procerssors disabled.

The general findings on the web suggest 1150-1250, including myself. It may make your decision a little easier, as the 5850 is still an awesome card.
 
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bmadd89

Member
Sep 22, 2010
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Is that stock voltage?
Click to expand...

No. Its at 1.23V. I only got 910 on stock voltage but it has responded well to the voltage. I cant change the memory voltage but i have lowed it a bit to 1100 cause i have been hearing that pushing to to hard can wear the mem controller out particularly fast.
 
StinkyPinky

StinkyPinky

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Jul 6, 2002
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Rifterut said:
I have used a few powercolor cards for builds over the last year or so and i think their quality has improved over the crap they produced 10 years ago. That said i cant comment specifically on their 5850 model. Havent had to RMA a card to them so cant comment on customer service.
Click to expand...

I've got a PC 5850 and it seems fine. Then again, these were reference boards that AMD designed and they stuck a sticker on.....
 
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