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Author Topic: 5850 core clock.  (Read 3490 times)
PcChip
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August 08, 2011, 04:33:49 PM
 #21

Usually for me, if Afterburner won't work, TriXX will.  The combination of both usually will let me tackle any problem (except my third dedicated rig, which has crossfired 5770's... for that I'm experimenting with BarelyClocked, and it seems to be a VERY powerful commandline tool, possibly written by a bitcoin forum member)

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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mike678
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August 08, 2011, 04:46:11 PM
 #22

I'm curious what would cause afterburner to not work but trixx to work perfectly fine?
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August 08, 2011, 09:24:05 PM
 #23

^me too, but I never have much success with Afterburner, at least not for multiple GPU systems.  Trixx on the other hand seems to work well for me, it's cleaner and simpler too, which I like....
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August 08, 2011, 10:08:51 PM
 #24

The only thing I don't like about Trixx is the fact that it keeps setting the fan speed back to default every time I restart my computer instead of using the custom fan profile I setup.

It saves my fan profile, but I have to manually click the custom fan profile setting because otherwise my card overheats on the stock fan profile. That's the only reason why I don't use Trixx.
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August 08, 2011, 10:13:49 PM
 #25

I have my 3x5880 at 950/300/1088 giving 389 Mhash/s with Linux (using atitweak) and perfectly stable.

I have the feeling that I can go more far away with them, they are only at 69ºC with the fan at 70% but I care for the PS. It is a Corsair GS 800. Do you think I can go higher with it ?

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August 08, 2011, 10:28:32 PM
 #26

I found my old post about my personal best MH/s for a 5850.  461.1 MH/s at 1110 MHz core clock, 3 hours continuous with very few stales.

Higher clocks such as 1140 MHz were fine for a short time but after 30 seconds or so the cards cut out due to high temperatures.  I couldn't find a way to circumvent this so I guess (I have no water-cooling).

As I said before, I don't run at these speeds normally - this is just a bit of fun.  The same card is now running at 377.5 MH/s (899MHz/327MHz@0.9875V) and I'm trying to get my miner up to 2.5 MH/J.
PcChip
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August 08, 2011, 11:11:15 PM
 #27

I wonder if the cards were cutting out due to GPU temps or VRM temps?

If it's not a reference cooler (in which the heatsink contacts the VRM's via thermal pads), maybe try using arctic cermique (sp?) to glue on some small heatsinks to the VRM's

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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August 08, 2011, 11:23:37 PM
 #28

I found my old post about my personal best MH/s for a 5850.  461.1 MH/s at 1110 MHz core clock, 3 hours continuous with very few stales.

Higher clocks such as 1140 MHz were fine for a short time but after 30 seconds or so the cards cut out due to high temperatures.  I couldn't find a way to circumvent this so I guess (I have no water-cooling).

As I said before, I don't run at these speeds normally - this is just a bit of fun.  The same card is now running at 377.5 MH/s (899MHz/327MHz@0.9875V) and I'm trying to get my miner up to 2.5 MH/J.

0.9875?
whoa.
that's quite an undervoltage. what's the temperature?


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Milkshanks
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August 09, 2011, 02:21:53 AM
 #29

Right now OC'd at 900/600/1.125 with TRIX. My 5850 is a XFX. I was trying out this new OC setup and my card crashed while I was typing this. Idk what's wrong with my card but it seems that it just can't stand having a 900mhz clock at 1.125 voltage, I need to pump it up to 1.150 so my card won't crash. Also, it hashes around 350mh/s @ 900. Yeah, I think I just got a god damn crappy batch.

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mike678
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August 09, 2011, 03:52:18 AM
 #30

Right now OC'd at 900/600/1.125 with TRIX. My 5850 is a XFX. I was trying out this new OC setup and my card crashed while I was typing this. Idk what's wrong with my card but it seems that it just can't stand having a 900mhz clock at 1.125 voltage, I need to pump it up to 1.150 so my card won't crash. Also, it hashes around 350mh/s @ 900. Yeah, I think I just got a god damn crappy batch.
Lowering the mem clock to around 300 should help. If it becomes unstable below 600 try a different version of its drivers. I switch from 11.6 to 11.7 and from afterburner to trixx and that fixed all my problems.
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August 09, 2011, 04:17:23 AM
 #31

The problem is that I can't lower Memory Clock too much cause I use my comp for other stuff other than mining too. So I try to leave it at 900 mem clock togheter with 900 gpu clock @ 1.125 voltage, but that ocasionally crashes my gpu.

Was my post useful? Tips accepted Smiley
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teukon
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August 09, 2011, 06:31:40 AM
 #32

I wonder if the cards were cutting out due to GPU temps or VRM temps?

If it's not a reference cooler (in which the heatsink contacts the VRM's via thermal pads), maybe try using arctic cermique (sp?) to glue on some small heatsinks to the VRM's

Good question, I've wondered this myself.  I'm guessing it was the GPU rather than the VRM that was suffering simply because everything was fine for 3 hours at 1110 MHz and consistently died in seconds at 1140 MHz (same voltage).  When I replaced the stock cooling I was not able to improve the VRM cooling and the sticky pads and stock heatsink remain in place.  For the testing I had a fan-heater turned to cold and focusing a blast of cool air on the VRMs.  I have no way of measuring the temperature of the VRMs and can only assume they were roasting.

Thanks for the tip but I'd rather take good care of my cards by running at lower settings. Smiley
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August 09, 2011, 06:51:45 AM
 #33

I found my old post about my personal best MH/s for a 5850.  461.1 MH/s at 1110 MHz core clock, 3 hours continuous with very few stales.

Higher clocks such as 1140 MHz were fine for a short time but after 30 seconds or so the cards cut out due to high temperatures.  I couldn't find a way to circumvent this so I guess (I have no water-cooling).

As I said before, I don't run at these speeds normally - this is just a bit of fun.  The same card is now running at 377.5 MH/s (899MHz/327MHz@0.9875V) and I'm trying to get my miner up to 2.5 MH/J.

0.9875?
whoa.
that's quite an undervoltage. what's the temperature?

Right now my temps are 57*C and 43*C respectively (one card is sucking in air being heated by the back of the other).  The miner is in a pretty small room and if I cut off all ventilation for 12 hours or so the temperatures can reach as high as 62*C and 48*C (peak from the last two weeks).  This is with all fans turned down to minimum to reduce noise as much as possible.  If I turn up all the fans and keep the room reasonably well ventilated the temps sit at about 44*C and 36*C.

I've been through a phase of maintaining high clock rates but I much prefer having a cooler and very quiet miner achieving more than 2.4 Mh/J and I certainly don't mind sacrificing around 100 Mh/s (from 828 Mh/s to 733 Mh/s) for this.
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August 09, 2011, 06:55:45 AM
 #34

The problem is that I can't lower Memory Clock too much cause I use my comp for other stuff other than mining too. So I try to leave it at 900 mem clock togheter with 900 gpu clock @ 1.125 voltage, but that ocasionally crashes my gpu.

Have you tried using phatk 2.1 or phatk 2.2?  It has an option "VECTORS4" which you could give instead of "VECTORS" which might improve your hash-rate.  "VECTORS4" is basically for people with high RAM clocks.  Don't forget to lower your WORKSIZE too.  Here's the main thread.
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August 11, 2011, 12:31:09 PM
 #35

I'm getting 406mhash/s with my sapphire xtreme 5850 @ 975/300 no voltage change, operates around 68 degrees C
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August 14, 2011, 03:25:53 AM
 #36

The problem is that I can't lower Memory Clock too much cause I use my comp for other stuff other than mining too. So I try to leave it at 900 mem clock togheter with 900 gpu clock @ 1.125 voltage, but that ocasionally crashes my gpu.

Have you tried using phatk 2.1 or phatk 2.2?  It has an option "VECTORS4" which you could give instead of "VECTORS" which might improve your hash-rate.  "VECTORS4" is basically for people with high RAM clocks.  Don't forget to lower your WORKSIZE too.  Here's the main thread.


I see, thanks for letting me know, but sadly I'm using poclbm.

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August 15, 2011, 05:10:32 PM
 #37

I have a HIS Radeon HD 5850 that I cannot OC past 775Mhz, 600 Mem .  If I raise it just by 1 to 776 the card crashes and the rig needs a cold reboot.  I have a 2 card rig (6950 ref and the HIS 5850).   The 6950 pushes 430 Mh/s but I cannot get the 5850 to break 303 M/hs.  I clearly must be doing something wrong.

Setup:
ASrock 970 Extreme4
PSU: Thermaltake TR2 RX 850
GPU0: HD 6950 Ref
GPU1: HIS HD 5850
OS: Debian via BAMT

Anyone have the same card and success in OC w/ aticonfig or atitweak?

mike678
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August 15, 2011, 05:55:55 PM
 #38

I have a HIS Radeon HD 5850 that I cannot OC past 775Mhz, 600 Mem .  If I raise it just by 1 to 776 the card crashes and the rig needs a cold reboot.  I have a 2 card rig (6950 ref and the HIS 5850).   The 6950 pushes 430 Mh/s but I cannot get the 5850 to break 303 M/hs.  I clearly must be doing something wrong.

Setup:
ASrock 970 Extreme4
PSU: Thermaltake TR2 RX 850
GPU0: HD 6950 Ref
GPU1: HIS HD 5850
OS: Debian via BAMT

Anyone have the same card and success in OC w/ aticonfig or atitweak?


I think I've heard mixing 6xxx cards with 5xxx cards can cause some issue. I don't know the solution though since I have never tried to mix the series.
fcmatt
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August 16, 2011, 05:09:19 AM
 #39

I have a HIS Radeon HD 5850 that I cannot OC past 775Mhz, 600 Mem .  If I raise it just by 1 to 776 the card crashes and the rig needs a cold reboot.  I have a 2 card rig (6950 ref and the HIS 5850).   The 6950 pushes 430 Mh/s but I cannot get the 5850 to break 303 M/hs.  I clearly must be doing something wrong.

Setup:
ASrock 970 Extreme4
PSU: Thermaltake TR2 RX 850
GPU0: HD 6950 Ref
GPU1: HIS HD 5850
OS: Debian via BAMT

Anyone have the same card and success in OC w/ aticonfig or atitweak?


I think I've heard mixing 6xxx cards with 5xxx cards can cause some issue. I don't know the solution though since I have never tried to mix the series.

mixing is not an issue on win7 64bit proffessional. two ref 6950s with a non-ref 5850. 6950s at 430mh/s with the 5850 at 390 mh/s.
but perhaps linux is different? just throwing my windows exp out there.
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August 16, 2011, 02:21:16 PM
 #40

I'm getting 406mhash/s with my sapphire xtreme 5850 @ 975/300 no voltage change, operates around 68 degrees C
Do you have 1 card only?
I have 6 sapphire xtreme 5850 and the best card works stable @ 875/300 (the worst works @ 800/300), how did you made it work @ 975MHz ?
What OS do you use (Linux/Windows 32/64bits)?
What PSU do you use?
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