Mining speed on a 5830

[Gladamas]

I have a Reference model Dell Radeon HD 5870 and a Sapphire 5830. The hash rate of the 5870, when overclocked to 1.212 V and 950 MHz, is fine, about 425 Mhash/s. The 5830, on the other hand, is not a reference model (there are no reference model 5830s), and I only get about 250 M/s on that. I see from my research that I should be getting about 300Mh/s on that card.

The stock clock/voltage setting on the 5830 is 1.162 V and 800 MHz (I have not changed that.) I use CGMiner with these flags on the 5870:

Code:

-w 128 --gpu-memclock 500 -g 3 -I 9

And this on the 5830:

Code:

-w 64 --gpu-memclock 750 -g 3 -I 7

Is it safe to OC the 5830? If so, what voltage/clock setting would you recommend?

[pekv2]

For the 5830, the maximum with good cooling is don't go over 1.3v, safe, i'd say is 1.225v.

So, depending on which 5830 you have, 1000/300/1.225v. Just keep the temps below 80c. We all usually try to keep it at around 74c.
                                                      core/mem/voltage
If your running an A/C unit, of course, this provides better cooling for all your hardware.

I try to keep my room ambient temps around 76f/24c. As it has been hitting the mid 90's outside. Use circulating fans, box fans and/or other fans to keep air circulating.

http://www.overclock.net/t/1022517/safe-voltage-level-for-5850-and-5830

By all means, if anyone does this, they risk ruining hardware. < That just needs to be said so I don't take responsibility, etc.

[Gladamas]

For the 5830, the maximum with good cooling is don't go over 1.3v, safe, i'd say is 1.225v.

So, depending on which 5830 you have, 1000/300/1.225v. Just keep the temps below 80c. We all usually try to keep it at around 74c.
                                                      core/mem/voltage
If your running an A/C unit, of course, this provides better cooling for all your hardware.

I try to keep my room ambient temps around 76f/24c. As it has been hitting the mid 90's outside. Use circulating fans, box fans and/or other fans to keep air circulating.

http://www.overclock.net/t/1022517/safe-voltage-level-for-5850-and-5830

By all means, if anyone does this, they risk ruining hardware. < That just needs to be said so I don't take responsibility, etc.

Thank you! That worked!

[pekv2]

For the 5830, the maximum with good cooling is don't go over 1.3v, safe, i'd say is 1.225v.

So, depending on which 5830 you have, 1000/300/1.225v. Just keep the temps below 80c. We all usually try to keep it at around 74c.
                                                      core/mem/voltage
If your running an A/C unit, of course, this provides better cooling for all your hardware.

I try to keep my room ambient temps around 76f/24c. As it has been hitting the mid 90's outside. Use circulating fans, box fans and/or other fans to keep air circulating.

http://www.overclock.net/t/1022517/safe-voltage-level-for-5850-and-5830

By all means, if anyone does this, they risk ruining hardware. < That just needs to be said so I don't take responsibility, etc.

Thank you! That worked!

You're welcomed.

[ssateneth]

You must not pay for electricity. Pretty sure overvolting that huge amount is just making you lose any money gained from overclocking it.

[Gladamas]

You must not pay for electricity. Pretty sure overvolting that huge amount is just making you lose any money gained from overclocking it.

How many more watts does this overvolt need compared to stock speed? Electricity is relatively cheap here, about $0.09/kWh during the summer anyway.

[pekv2]

How many more watts does this overvolt need compared to stock speed? Electricity is relatively cheap here, about $0.09/kWh during the summer anyway.

Probably best to get a killawatt meter to get exact readings.

[Aseras]

every 5830 I have ( 15 of them ) will do 1000 mhz on 1.1V no need to go any higher, it just makes more heat. 1000 mhz is good for ~320mhash on 2.1 sdk and phatk kernel.

Watch the temps in gpu z each temp is a different spot on the gpu die. If one is higher by a significant degree it's time to reapply heatsink TIM.

[zvs]

my old sapphire xtreme's i swapped between 930/195 @ 1.063v for 295mhash and 1000/195 @ 1.163v for 330mhash

[ChanceCoats123]

From what you posted, I take it you're running cgminer? If so, I've found that cgminer typically chooses the best settings. So you have the workload set to 64, I keep it on auto and I get 290mhash/sec @900/300. I would try to remove the manual workload size and see how that affects the hash rate.

[Gladamas]

From what you posted, I take it you're running cgminer? If so, I've found that cgminer typically chooses the best settings. So you have the workload set to 64, I keep it on auto and I get 290mhash/sec @900/300. I would try to remove the manual workload size and see how that affects the hash rate.

I am running CGMiner. I will try that suggestion.

One more thing, for some reason CGMiner isn't using all of the clock speed that I set in either TRIXX/AfterBurner or in the command line argument. I set it to 1200 mV, 950/300 but I get only ~250 mh/s. GPU CAPS viewer shows that the Max clock is indeed 1200 mV and 950/300, but the Current clock is back to default, 1163 mV and 800/1000. I have Catalyst 12.1, so I'll upgrade and see if that helps.

EDIT: Upgraded to Catalyst 12.6, everything seems to be working great now. Getting 305 mh/s on my 5830 at 1200mV, 975/300!