Two 5830 @ 280Mhash/s, can I get more out of it?

[innervisi0nn]

why you guys underclock the gpu memory?

energy, more hashes, makes up for overclocking

[PcChip]

I've speculated in the main memory lowering thread that performance increases due to either clock dividers or latencies.

Brings back memories of the old p35/p45 chipsets overclocking days, where sometimes 450 MHz FSB would be faster than 500 MHz.

[gyzer]

Thank you all for the comments. I have been able to get over 300 Mhash/sec!!

I now have two 5830's.

I tried running both of them with two separate instances of phoenix miner and I had some major issues with the monitor that was hooked up to the new card getting bars across the screen and locking up my system.

Both of my phoenix settings are as follows:
 -k poclbm Device=0(1 for the second card) BFI_INT fastloop=false Aggression=12 Worksize=256

These are both running off of separate copies of phoenix in different directories.

My overclock is as follows as well for both cards:
GPU: 985Mhz
RAM: 250Mhz or 500Mhz depending on how MSI Afterburner is working
Fan Speed: 75%
Temps are around 61-64 degrees Celsius.

So after I had that problem I decided to go back to GUIMiner until I can spend more time on getting phoenix to work on both cards.

In GUIMiner I'm getting about 250-285Mhash/sec but sometimes I notice that the second card goes down to as little as 5-20Mhash/sec for as long as a few minutes.

I am using the -v -w 256 flags in GUIMiner and I am mining at btcguild.

I was really hoping to be able to get 300Mhash/sec out of each card with everything being stable but I don't know if that's reasonable.

What are some things I can try to resolve these issues?

[innervisi0nn]

Thank you all for the comments. I have been able to get over 300 Mhash/sec!!

I now have two 5830's.

I tried running both of them with two separate instances of phoenix miner and I had some major issues with the monitor that was hooked up to the new card getting bars across the screen and locking up my system.

Both of my phoenix settings are as follows:
 -k poclbm Device=0(1 for the second card) BFI_INT fastloop=false Aggression=12 Worksize=256

These are both running off of separate copies of phoenix in different directories.

My overclock is as follows as well for both cards:
GPU: 985Mhz
RAM: 250Mhz or 500Mhz depending on how MSI Afterburner is working
Fan Speed: 75%
Temps are around 61-64 degrees Celsius.

So after I had that problem I decided to go back to GUIMiner until I can spend more time on getting phoenix to work on both cards.

In GUIMiner I'm getting about 250-285Mhash/sec but sometimes I notice that the second card goes down to as little as 5-20Mhash/sec for as long as a few minutes.

I am using the -v -w 256 flags in GUIMiner and I am mining at btcguild.

I was really hoping to be able to get 300Mhash/sec out of each card with everything being stable but I don't know if that's reasonable.

What are some things I can try to resolve these issues?

When you use MSI Afterburner, in settings, are the cards setup to be synced? Theres a little check-box for that, make sure its checked.

Im running the same setup, getting 303 for each card, total 4 cards

[gyzer]

One card is a XFX 5830, the other is a Saphire 5830. I'm seeming to have crashes when I go to do anything intensive concerning the Saphire card. Is that possibly my problem? I shouldn't have mixed cards?

[innervisi0nn]

One card is a XFX 5830, the other is a Saphire 5830. I'm seeming to have crashes when I go to do anything intensive concerning the Saphire card. Is that possibly my problem? I shouldn't have mixed cards?

It could happen, are you using MSI afterburner? I have my cards double up by brand, 2x xfx and 2x sapphire on two rigs.
Try using MSI afterburner and not syncing the settings, uncheck that in the settings box, set the core clock manually for each and apply seperately.
Just because they are the same model does not mean they work the same. Chipset = same, but some of the other features are not.

[Fakeman]

How do you go beyond 875 MHz in Afterburner with the Sapphire 5830?