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Author Topic: Radeon HD 58XX Series users get in here!  (Read 24546 times)
iMiner
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June 12, 2011, 04:58:31 PM
 #81

So how much does OC'ing cost in terms of lifetime?  Seems to yield an extra 10% in hash rate,  is it worth it?
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June 12, 2011, 05:39:36 PM
 #82

So how much does OC'ing cost in terms of lifetime?  Seems to yield an extra 10% in hash rate,  is it worth it?

It can be significantly more than 10%....

Stock I was at 292 MHs with poclbm.  OC'd I'm at 392 MHs with phoenix.

That's some 30%!

Over-time-damage can be a gamble and often you can damage more than just your videocard.  Cheap components on motherboards and PSUs will go up in smoke sometimes as well as getting a general life reduction.

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June 12, 2011, 05:50:03 PM
 #83

So how much does OC'ing cost in terms of lifetime?  Seems to yield an extra 10% in hash rate,  is it worth it?

It can be significantly more than 10%....

Stock I was at 292 MHs with poclbm.  OC'd I'm at 392 MHs with phoenix.

That's some 30%!

Over-time-damage can be a gamble and often you can damage more than just your videocard.  Cheap components on motherboards and PSUs will go up in smoke sometimes as well as getting a general life reduction.


Yeah, the 5870 does around 350 Mh/s without overclocking and 445Mh/s OC (maybe others get even more). If you lower the memory speed, keep the voltage low (I have 1'080 while maximum non-OC is 1'136) and the heat is low, why should it be a problem?
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June 12, 2011, 07:03:49 PM
 #84

I'm running on LinuxCoin v0.2a

Sapphire HD5850 Xtreme 1GB | 360 MHash/s | OC @ 900/300 | Phoenix w/ phatk |
Sapphire HD5970 1GB | 375 Mhash/s (Per Core) | OC @ 850/300 | Phoenix w/phatk |

5970 are after market, didn't come with box so I don't know what edition. Not really into GPU.

Not sure of my CC, SDK, Phoenix & phatk versions. All came with LinuxCoin. Still trying to migrate to Ubuntu.
Would appreciate some input from others too Smiley

BTW, seems to run more stable on poclbm although gets 330 Mhash/s on 5850 & 350 Mhash/s on 5970. phatk gives better Mhash/s.

I have quite a couple of those so the +30 & +25 Mhash/s adds up to a lot. (2x5970 = +100Mhash/s, 6x5850=+180Mhash/s) More 5850 coming in next week.

Never owned 5830 nor 5870. Might move onto them once the supply of 5850 runs out. Which doesn't seem likely yet.

OP can you let me know what are you doing to your HD4850 to get 80 Mhash/s? I can't seem to get a stable OC on Linux. I used to just Overdrive max core clock w/o messing around with mem clock on Windows.

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June 12, 2011, 07:09:17 PM
 #85

On my 5870s, I get close to 400 at 900/300Mhz (see my post above). With overclocking I meant going above 900MHz and at higher voltages than AMDOverdriveCtrl allows me to. For me it seems to be not much more than 10% gain, and I doubt I want to risk my hardware for that. It would also require a BIOS flash, which may not be entirely without risk either.
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June 12, 2011, 07:20:55 PM
 #86

Lifetime might be decreased by temperature, keep below 80C.

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June 12, 2011, 07:37:33 PM
 #87

I have significant experience mining with these cards so let me help you out and save you some time.


The 5870 is an awesome card. You can mine stable at 415-420mh/s
use MSI Afterburner and overlcock it to 980 core and 180 mem
set the fan at 75%

I have two that have been hashing for months without a crash or a reboot.

The 5830's are a little slower but you can get around 280-300 mh/s stable
clock these also at 1000 core but they like the 300 mem clock sweet spot
also set fans to 75%


I have two of each.

I also mine with two 6870's
they love to run with high core clocks
get em both at 1025 core and 180 mem
give me 295-305 mh/s all day


Hope I could help.
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June 12, 2011, 07:47:31 PM
 #88

I have significant experience mining with these cards so let me help you out and save you some time.


The 5870 is an awesome card. You can mine stable at 415-420mh/s
use MSI Afterburner and overlcock it to 980 core and 180 mem
set the fan at 75%

I have two that have been hashing for months without a crash or a reboot.

The 5830's are a little slower but you can get around 280-300 mh/s stable
clock these also at 1000 core but they like the 300 mem clock sweet spot
also set fans to 75%


I have two of each.

I also mine with two 6870's
they love to run with high core clocks
get em both at 1025 core and 180 mem
give me 295-305 mh/s all day


Hope I could help.

What about power consumption?
Notrem
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June 12, 2011, 08:05:20 PM
 #89

5870 950/300 420 MH/S SDK 2.4 Phoenix phatk agggresion 14
Uhrenknecht
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June 12, 2011, 08:07:40 PM
 #90

Hey there,

just ordered a returned Gigabyte 5870 for 177€ at computeruniverse.net .

Actually got a Nvidia 8800GTS running with a bequiet 430W power supply.

Wondered if I'd need a new power supply and fan(s) for the 5870? I'm running an Athlon Dual 6000+ with 2GB DDR2 Ram.

If so, what power supply would you suggest, and how much power/fans do I need if I wanna OC the 5870?

Thanks for help, Uhren

kcobra
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June 12, 2011, 09:24:25 PM
 #91

I have significant experience mining with these cards so let me help you out and save you some time.

...

I also mine with two 6870's
they love to run with high core clocks
get em both at 1025 core and 180 mem
give me 295-305 mh/s all day


Hope I could help.

When I set the memory so low (180mhz) on my two 6870's it has a big negative impact on the hash rate:

1025mhz/180mhz: ~270 mh/s
1025mhz/300mhz: ~310 mh/s

I run the following phatk kernel flags under phoenix on Win 7 with the latest CC drivers, SDK, etc:

DEVICE=X VECTORS BFI_INT FASTLOOP=false WORKSIZE=256 AGGRESSION=11

I was running with aggression=13 but I found it made my systems less stable.
willphase
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June 12, 2011, 10:05:46 PM
 #92

probably a good place to ask...

I'm getting 100% CPU (main CPU) on my 2x5870s and just want to check that this is what I'm supposed to see... it's not a huge deal for me since I have a dedicated mining rig but I heard something about SDK versions affecting main CPU.

My details are:

AMD Athlon(tm) II X2 250 Processor (2 cores)
2 x XFX ATI Radeon HD 5870
OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10) FULL_PROFILE
8.850.0.0 - Catalyst 11.5 (4-19-2011) - GL:atig6pxx.dll
Windows 7 x64
phoenix miner with phatk kernel

Only asking because I presume running 100% CPU uses more power...?  Also dropping the CPU would allow me to use it as a reliable fileserver as well.

Will

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