i recently just bought a gigabyte HD 5830. it's been running really well, but i've heard that it also overclocks quite well--unfortunately, i have achieved very poor results.
i've done the overclock so far using the catalyst control centre and the core clock will not go above 850MHz. i set it to 860 and run the CCC test and i always fail it. this seems unlike, as i've heard everybody else getting overclocks in excess of 900MHz EASSSY. furthermore, at said clocks it idles at 36 celsius and loads from 55-60. (i've enver seen it past 58)
i do not think it is a system or power limitation (specs below), but did i just get unlucky and get a card that is that bad?
any advice on other programs i can use to OC with ATI cards as well?
Since your 5830 does not have voltage control you are limited to the overclock. Don't use CCC to overclock the card. Use Afterburner and raise only in increments till it freezes, then back off a bit and you should be fine.
at 870MHz core my brother got artifacts on WOW. brought it down to 860 and it worked. that is severely depressing. i think i'll keep trying when i get a rainy day where i'm doing absolutely nothing and have hours of time.
i tried clocks at 870MHz on DOW2 and HAWX. in both games there were no artifacts but 3 times in a half hour it caused VPU Recover (CCC feature) that resets the graphics driver cause it is not responding. it never happened once at 860MHz. i really think my card can not legitimately overclock past 860MHz.
this guys seemed to have the same problem as me--his card wouldn't do more than 840/1100-- that's even weaker than mine. i'm not sure if he found a bios with a higher voltage, but i think we both just got extremely weak cards.
It's up to you, you can take psycho's advice and flash or return the card for a refund and buy something else/RMA. When you RMA you can get a new one or a refurbished, depending on where you got the card.
NCIX.com, a Canadian site. i think i'll just live with it though. i looked online there and ti said RMAs take 2-3 weeks for turnaround. problem is i'm going to Europe for 4 weeks, leaving next monday, and i don't want to be worrying about RMAing a video card. also, the card works fine, and i least a overclock i little bit. i just got a card that's a poor overclocker--i'll only be using it for 6-months to a year, then i'll be building a new rig for university. i just don't feel like going through the task of refunding/replacement, given timelines i have and the actual benefit i will gain out of it. it's still a powerful enough card to let me play any game i want until then, so i don't think i'll waste a month trying to gain that extra 100MHz