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I just got my XFX 5830 last night and got it in my rig. I underclocked the ram down to 500Mhz and overclocked the GPU from 800Mhz to 980Mhz. I was getting about 290 using GUIMiner with the flags -v -w 256 but I had some odd problems staying connected to BTCGuild while using it. I decided to try the phoenix miner for the first time.

My current settings with phoenix miner are the following:

-k poclbm DEVICE=0 VECTORS BFI_INT FASTLOOP=false AGGRESSION=11

Are there any additional or different settings I can play with to get past 280Mhash/s?

I get 280Mh/s on my 5830 using only a 970 Mhz OC
poclbm with flags -v -w 128

I hear you're supposed to get more with Phoenix, so maybe you're doing something wrong.

Also, you could try mining in Linux, I hear that helps.

Getting 295 out of my sapphire 5830 @ 981/327 on Slush using poclbm 4/28


-v VECTORS BFI_INT FASTLOOP=false AGGRESSION=12 WORKSIZE=256

add "worksize=256" and maybe try "phatk" kernel

You might get more out of a linux install running hashkill or phoenix. The difference is fairly negligible at this point though.

yeah just finally switched to phoenix + phatk and now getting 307 out of my 5830 @ 990/330.

with identical flags as before
poclbm - 295
phatk - 307

975/300  (-v -w128 -f0) f0 really makes a 1% diff i think (not sure tho)

running GUIminer, getting 289 mhash/s I have four of these running :)

Hi guys, I have a few saphire 5830s poclbm -v -w256 but only getting 222Mhash/s. Do you no of any good tutorials on overclocking/underclocking memory tutorials?  Also I know people are adjusting their fan speed, but I don't understand if they are raising the speed to increase cooling or lowering the fan speed to decrease power consumtion.  Any help would be much appreciated.

Read my tutorial here:

http://forum.bitcoin.org/index.php?topic=10948.msg156921#msg156921

Drop your -w256 to -w128

If ts the sapphire card, you need to set it to 950 core clock/600 mem clock, i have my fan manually set to 80%

After you follow instructions and set what I just said above, close msi afterburner and reopen it.
Then drop your MEM clock to 330-340 (pref 340) and make sure you see no artifacts on your screen or buzzing anywhere.

You should get 288 mhash/s - just make sure to keep the card cool (hence why I have it at 80%
runs 64-68 celcius which is fine.

Thanks innervisi0nn for the quick response.  I'm running linux.  Linuxcoin live to be specific.  Any advice?  What are you keeping your temps at?

Sorry not running Linux. I can keep 60 celcius if I have my home fan on it, if not, its about 65-68 celcius with stock fans + 2 extra 140mm fans at 80%

I've got my 5830's up to about 320 Mhash/s each... That's around 1025/320 and 80% fan I think, no voltmods only RBE.  280 is right around where they are naturally stable, takes a fair bit of babysitting to get over 1000.

thanks guys, I'm gonna dig into the RBE tutorial this weekend :)

That is quite impressive.  Glad you bumped you thread.

Going to try phatk any time soon?

sorry for the noob questions, but can someone tell me what the "1025/320" numbers are and why lowering the memory clock would increase the hash speed?

thats 1025MHz gpu core clock and  320MHz mem clock. lower mem clock helps to keep temps down enabling to bump up core clock

thank you so much for clearing that up.

how hot are the cards running?

Bottom one runs around 80c (hotter than I'd like, need to get a mobo that allows better spacing).  Top one hovers around 70c generally.  Am thinking of investing in an improved cooling / power / mobo solution rather than just a random desktop I had lying about.

why you guys underclock the gpu memory?

energy, more hashes, makes up for overclocking

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.

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

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.

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