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Author Topic: 5850, low temp but still seeing artifacts?  (Read 3688 times)
nazgulnarsil
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June 03, 2011, 04:49:16 AM
 #1

OC'd to 950 I see artifacts pop up but it can still hash and the temp is rock steady at 67 after stabilizing (checked with MSI afterburner and GPU-Z)

Artifact free at 925, which is what I'm running right now.

if it is a VRAM issue at higher OCs am i going to damage my card running it that fast?  like I said it still hashes and temps are low.

getting 342Mh at 925 core 310 memory

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June 03, 2011, 04:53:43 AM
 #2

iirc stock speeds for a 5850 is 725. Just because temps are low doesn't mean the card is happy, and 225MHz (31%) overclock is quite large. Overclocking stresses hardware even at lower temps, but it shouldn't kill it in the next few days if that's what you're worried about.
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June 03, 2011, 05:04:12 AM
 #3

I was kind of wondering the same thing - this 5850 seems to clock up to whatever you set it at and work.  So whats the "safer" bet.

Also anyone who has the quick and easy way to underclock the memory on the card please let me know

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June 03, 2011, 05:07:33 AM
 #4

MSI afterburner underclocked it for me. 

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warrensgun
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June 03, 2011, 05:15:00 AM
 #5

I was hoping for a command line program - not an msi board

nazgulnarsil
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June 03, 2011, 05:20:57 AM
 #6

don't need an msi board.

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pokermon919
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June 03, 2011, 05:52:01 AM
 #7

I was hoping for a command line program - not an msi board

MSI Afterburner is what the clocking software is called.
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June 03, 2011, 07:00:04 AM
 #8

MSI AB download http://event.msi.com/vga/afterburner/download.htm

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June 03, 2011, 07:22:21 AM
 #9

Running a 31% overclock 24/7 for mining is not sustainable over the long term. You will lose out financially in the end when the VRM & hardware fails faster than it would have at a mere 0 to 10% OC at stock voltage.

1f3gHNoBodYw1LLs3ndY0UanYB1tC0lnsBec4USeYoU9AREaCH34PBeGgAR67fx
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June 03, 2011, 09:36:39 AM
 #10

5850 is fine/stable at 900+ core.  Lots of people on oC related forums have hit higher numbers messing with the voltages.  I'm running stock voltage.

OC causes damage is overblown.  Every serious hardware person I've asked says the wear difference is negligible.

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June 15, 2011, 08:30:46 PM
Last edit: June 15, 2011, 09:36:00 PM by supermine
 #11

Don't listen to nazgulnarsil, xonar. They are probably undercover evangelists, read: Astroturfers for ATI, the company probably responsibly for this whole BitCoin thing.. lol. Just kidding, but wanting to make you think about the enourmous waste of resources of this project and who is the real benefitor; at the moment at least it is the hardware companies, foremost Foxconn ( https://secure.wikimedia.org/wikipedia/en/wiki/Foxconn#Controversies ).

I have the Sapphire Xtreme 5850 since 3 days now with Artefacts all over my Desktop, both in Linux Fedora Core 15, with or without Compiz and in Windows. I plugged the powercable of my high-end Enermax PSU and gave it a 15 minute rest, still seeing artefacts, a lot of them. I mean it's really really ugly, I can't see anymore.

This is all it took to destroy my poor Sapphire (RIP)  Cry

Clock to 890 (core),1000 (mem)
Agression=11
Fan=60
Temps: 60°C

Let it run 24h on that settings.

The card is now longing for the trashbin. The damaged VRAMs probably will cause damage to my not-so-cheap-either 1155 board, too.

Underclocked the card now to 300 (mem) and overclocked exactly 10% to 797MhZ (core). This gives me 15% less hash rate return, however a 100% return on my $199 investment in the 5850.
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June 17, 2011, 09:59:43 PM
 #12

Clock to 890 (core),1000 (mem)
Agression=11
Fan=60
Temps: 60°C

Let it run 24h on that settings.



Send the card back, clearly defective from the start if what you are saying is true.
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June 17, 2011, 10:51:58 PM
 #13

I was hoping for a command line program - not an msi board
cough, errrrm, sig, cough

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PcChip
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June 19, 2011, 04:27:08 AM
 #14

Send the card back, clearly defective from the start if what you are saying is true.

Agreed.  98% of other overclockers here run their cards at the very ragged edge of stability for months at a time without issues.  If the card was defective or borderline from the beginning, overclocking will expose it quickly.

RMA it.

Legacy signature from 2011: 
All rates with Phoenix 1.50 / PhatK
5850 - 400 MH/s  |  5850 - 355 MH/s | 5830 - 310 MH/s  |  GTX570 - 115 MH/s | 5770 - 210 MH/s | 5770 - 200 MH/s
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