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[Official] AMD Radeon HD 6850/6870 Owners Thread - Page 501

post #5001 of 6939
Im not a expert and cant see what ur clock n mem are coz im on my phone but I dont think that is normal im pretty sure I read domewhere that these cards are good for 80-90c but obviously the lower that temp the better I got my 6850 to 950/1225 when my ati tool tray worked no artifacts and max temp 69c but im sure ull get some more fact from some1 else that knows alot more than me smile.gif
post #5002 of 6939
Quote:
Originally Posted by Ninja10R View Post

Sapphire HD 6850 owner
337
Don't know if it's been answered somewhere in 500 pages, but i am going to ask anyway. My 6850 starts producing artifacts and eventualy crashes when temps rise above 73-74 Celsius running furmark stress test. Is that normal ?

At stock clocks these cards will go over 100c with-out stability problems.But with a heavy overclock its perfectly normal to run into issues at those temps.
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post #5003 of 6939
The default clock for core and memory is 775 and 1000 Mhz, i have oc them at 810 and 1150 Mhz. Is that too much ?

I think i will try the tests again with stock clocks to find out.
post #5004 of 6939
Quote:
Originally Posted by Ninja10R View Post

The default clock for core and memory is 775 and 1000 Mhz, i have oc them at 810 and 1150 Mhz. Is that too much ?
I think i will try the tests again with stock clocks to find out.

Its possible, luck of the draw in all..but I doubt it.even with stock voltage you should be able to push it more.Try lowering your v-ram, lots of people get stable above 1200 but I cant go over 1125..Lower your v-ram to 1100 and slowly increase your core and see how high you can get it.
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post #5005 of 6939
At stock voltage, I can hit about 1010 MHz on the core and it's folding stable and will play any game, as soon as I touch the memory though and bring it away form its stock 1050, crashes randomly to desktop, sometimes even during VLC playback. VRM's never exceed 70 C though at stock voltage.

With a voltage bump to 1.21 V I can hit 1060 MHz but heat sky rockets, and my VRM's don't have heat sinks and hit 100 C and I still can't move memory past 1100 MHz.



So some people have good memory chips, some have good GPU's themselves.

I have passive heat sinks on my memory and it doesn't make it more stable to overclock so I don't think the heat affects the memory too much on these cards, as previously stated, more of just luck of the draw,
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post #5006 of 6939
I have recently OC'd my xfx 6870 dual fan for the first time, i just used the sliders in ccc, voltage is obviously stock.

It's now on 980core, 1125mem. Is that decent? I tested it with OCCT for 25minutes, no errors, temps 77c. I also played BF3 for a few hours(temp 71c), no issues, so i guess it's stable then.
post #5007 of 6939
980/1125 is a pretty good overclock and 77 C is pretty good as well biggrin.gif
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CANARY - Main Rig
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CADILLAC - HTPC
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Intel i5-4570s Asus H97M-Plus AMD R9 280 G.Skill RipjawsX 16 GB (2x8) 
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post #5008 of 6939
Quote:
Originally Posted by Matt-Matt View Post

Theres two reasons for this..
The extra 160 shaders make the card run hotter and put more stress on the core/components.. (at least i'm guessing for the last part).
And the fact that sapphire may not bin their chips/cores/boards. Nor might AMD, they probably don't care to be honest. (It'd cost them alot more to bin them, rather then just test the ones that work and ones that don't)
All in all a 6850 is a better buy, uses less power, only needs 1x six pin. Runs cooler, overclocks more. 6850 to 6870 see's little to no difference in most games. It's also cheaper..
And not to forget when overclocked (if you get a decent one) a 6850 blows a 6870 away in the benchies.
Plus 6850 is easier to run in Crossfire, less heat, cheaper, less power connectors. More overclocking! thumb.gif
^Not word for word but a statement like this is what caused me to buy it in the first place. Plus it was on sale at around $150 which was the same as the HD5770 at the time of purchase.
Quote:
Originally Posted by Ninja10R View Post

Sapphire HD 6850 owner
337
Don't know if it's been answered somewhere in 500 pages, but i am going to ask anyway. My 6850 starts producing artifacts and eventualy crashes when temps rise above 73-74 Celsius running furmark stress test. Is that normal ?

EXACTLY what I was seeing too. The card is ok physically over those temps but emotionally they don't like it. lol Everytime over 65 it was artifacting a little bit. Over 75 it would crash. No problems when at stock and over those temps. But when overclocked, it has it problems.

I have found after putting a watercooler on mine and at the same clocks but lower temps, no artifacts or crashes.
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OCZ Vertex 460 WD 1TB Blue Koolance 380A EK-FC R9-290X 
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AMD A10 7850K ASUS A88X-Pro Sapphire 280x Sapphire 280x 
RAMHard DriveHard DriveCooling
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post #5009 of 6939
I backed down mem to stock 1000 Mhz and uped core to 850 Mhz (maximum allowed by ccc). No problems at all.

The strange thing is, that running furmark 15 min 1080 burn test, temp did not rise over 75 C. When memory was clocked at 1150 Mhz temp would rise quickly (after 1,5 min) to 74-75 C and the card crashed. The artifacts started after 65 C with the higher memory clock, no artfacts at all with stock clocks.

Thank you all.
post #5010 of 6939
Yeah that is pretty weird. I think that may have been what I was experiencing till I put ram sinks on the memory chips.
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OCZ Vertex 460 WD 1TB Blue Koolance 380A EK-FC R9-290X 
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Windows 8.1 64-bit Monoprice 27" IPS-Glass Pro Panel DUCKY! Antec HCP 850W 
CaseMouse
Hand built wooden desk Logitech G700S 
CPUMotherboardGraphicsGraphics
AMD A10 7850K ASUS A88X-Pro Sapphire 280x Sapphire 280x 
RAMHard DriveHard DriveCooling
Patriot Viper Xtreme Div4 1866mhz 60GB Vertex2 WD Caviar 500AAKS XSPC Rasa 
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My gaming desk
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Miner
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CPUMotherboardGraphicsRAM
AMD FX-8350 ASUS Sabertooth 990FX Sapphire 290x Patriot Viper Extreme Division 4 
Hard DriveHard DriveCoolingCooling
OCZ Vertex 460 WD 1TB Blue Koolance 380A EK-FC R9-290X 
OSMonitorKeyboardPower
Windows 8.1 64-bit Monoprice 27" IPS-Glass Pro Panel DUCKY! Antec HCP 850W 
CaseMouse
Hand built wooden desk Logitech G700S 
CPUMotherboardGraphicsGraphics
AMD A10 7850K ASUS A88X-Pro Sapphire 280x Sapphire 280x 
RAMHard DriveHard DriveCooling
Patriot Viper Xtreme Div4 1866mhz 60GB Vertex2 WD Caviar 500AAKS XSPC Rasa 
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Windows 7 64 bit EVGA 1000W G2 Thermaltake Level 10 GTS 
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