Try going to 1040/355 and use the phatk mod (http://forum.bitcoin.org/index.php?topic=23067.0). I'm getting a stable 329-330 MH/s out of mine the last 24hrs.
I get 329 from 1030/300 you might want to try Diapolo's update to the kernel if you use phoenix. 
Topic: How to maximize a 5830? - page 2. (Read 3470 times)
Try going to 1040/355 and use the phatk mod (http://forum.bitcoin.org/index.php?topic=23067.0). I'm getting a stable 329-330 MH/s out of mine the last 24hrs.
i used to trixx to push mine to 1025/300 cooling is very imporant though that's where i was hitting 80*c which while ok for this card is a bit uncomfortable to look at. that netted about 320mhash and might get you 330 there have been some improvements to the miners available since i swapped the card for a 5870.
go to the MSI folder located in your program files folder, and open the afterburner config file. then change the unofficial overclocking mode form 0 to 1, and copy and paste this in the EULA: I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it. save that file, and restart afterburner. your upper limit should increase past 900mhz 
EULA?
ya, did you find it? the EULA is the first line of the last paragraph in the config file. i forgot to mention that you have to open the config file with either notepad or wordpad. then copy and paste the bold text i just typed into that EULA area.
Yea got it all up and running. Yea I knew about the notepad. The system was giving me issues saving it (had to run as admin). Got it all working thanks again!
Just use trixx, it's easier to OC with it. If you set it to 970/300 it should be stable on stock voltage and get you about 310 mh/s.
go to the MSI folder located in your program files folder, and open the afterburner config file. then change the unofficial overclocking mode form 0 to 1, and copy and paste this in the EULA: I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it. save that file, and restart afterburner. your upper limit should increase past 900mhz
EULA?
ya, did you find it? the EULA is the first line of the last paragraph in the config file. i forgot to mention that you have to open the config file with either notepad or wordpad. then copy and paste the bold text i just typed into that EULA area.
go to the MSI folder located in your program files folder, and open the afterburner config file. then change the unofficial overclocking mode form 0 to 1, and copy and paste this in the EULA: I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it. save that file, and restart afterburner. your upper limit should increase past 900mhz
EULA?
edit: EULA End User License Agreement, ok but where do I find the EULA?
edit2: found it thanks!!!
go to the MSI folder located in your program files folder, and open the afterburner config file. then change the unofficial overclocking mode form 0 to 1, and copy and paste this in the EULA: I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it. save that file, and restart afterburner. your upper limit should increase past 900mhz
try to use MSI afterburner or sapphire trixx. the trixx software will allow you to change the voltage i believe. and also, most 5830's are stable with core over 900mhz, so try bumping up your core clocks a little.
I have MSI Afterburner installed and it does not let me go past 900 either, I think it may be a BIOS issue. Yet I doubt it because RIVA Tuner goes past 900 but then it f*cks with my fan settings.
try to use MSI afterburner or sapphire trixx. the trixx software will allow you to change the voltage i believe. and also, most 5830's are stable with core over 900mhz, so try bumping up your core clocks a little.
I just received my new 5830s
Their currently running at 900mhz and giving me about 250mhs each.
I read https://en.bitcoin.it/wiki/Mining_hardware_comparison
I want to try to reach the 300-310 mhs range. What combo do I need for this?!
I am currently running GUI Miner on windows 7 32 bit.
If you need more info let me know.
**PS: I tried to use RIVA Tuner to go over 900mhz but it kept dropping my fan speed down to 25% by itself so I decided not to use it. If not I would not be posting this.
Their currently running at 900mhz and giving me about 250mhs each.
I read https://en.bitcoin.it/wiki/Mining_hardware_comparison
I want to try to reach the 300-310 mhs range. What combo do I need for this?!
I am currently running GUI Miner on windows 7 32 bit.
If you need more info let me know.
**PS: I tried to use RIVA Tuner to go over 900mhz but it kept dropping my fan speed down to 25% by itself so I decided not to use it. If not I would not be posting this.
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