Topic: Sapphire 5830 Memory clock < 550 Issue (Read 2974 times)

close to the same setup running here, 230Mhash/s per GPU, no OC. first attempted to turn Mem speed down on one card resulted in the same issues between 400-550MHz using MSI Afterburner.
i was stable at 600MHz and then after dropping to 550MHz i lost 4hrs troubleshooting and reconfiguring to isolate the issue to a single card and then getting it reset to the factory defaults. Will i was having the issue the video on the card that was turned down to 550MHz would allow login to Windows and then crash to a blue or sometimes blue with lines screen. (not BSOD tho) which i could only resolve with a hard reboot.

fyi - now using the solution here http://forum.bitcoin.org/?topic=6575.0 for the DVI solution on the 2nd card!!

Monitored the temps for 30minutes

Sitting at

Top Card 57C
Bottom Card 58C

Little sooner then 1hr, realizing that my ugly boxfan was on medium, I turned it to high

Top Card is sitting at 58C
Bottom Card is sitting at 60C

Both have remained at those temps for about 10-15minutes



How long have you ran your 5830's at those clock speeds? I was bit afraid of frying the cards.

Keeping in mind that I have both fans on the Cards running at 100% and a High RPM Box Fan running at full speed pointed to the open side of the case.

I will monitor for an hour and let you know. Its floating between 59-60C at the moment.

58C ?? How long are you holding that temperature at 1000mhz?

Oh okay, I'm going to try dropping the clock right down to 300 and see how it goes.

So I got it down to 300 no problem, but with my flags for POCLBM -v -w64 -r2 -f1 I dropped my Hash rate down to 273-277

Switched it to -v -w128 -r2 -f1 and Its sitting at 304-306 on both cards.

Current Temperature 58C
Fan 100%
Core Clock 1000MHz
Memory Clock 300MHz

Avoid from 400 to 600, I've been using sapphire trixx which lets me jump to 300 without issue. With msi afterburner I have to set it around 600 and then restart the program to be able to set the 300 range. I switched back to afterburner for its multi-gpu monitoring.
I hope that helps, it works for me at least. I have the same cards.

I'm getting 308mh/s at 1000/350 using the phatk kernel & 2.1 sdk, I can't get above 290mh/s with the normal kernel.

After a couple days of reading, and messing around mining with my nVidia Refference 8800GT and MSI Twin-Frozr 250GTS I decided to make a small investment into mining bitcoins.

I found a dam good deal on Newegg for Sapphire Radeon HD 5830 and tired of seeing my crappy 70MHash/s out of my overclocked nVidia Cards, I took the plunge and got 2 of the 5830's.
Link: http://www.newegg.ca/Product/Product.aspx?Item=N82E16814102878&cm_re=5830-_-14-102-878-_-Product

Figured may as well, even if I don't make anything back, I still got a decent pair of cards to run in XFire.

Current Setup
=================================
GA P55-USB3 Motherboard
Intel i5 720
2x Sapphire Radeon 5830's ( not x-fired )
2x Craptastic 550W PSU's

GuiMiner (poclbm)
Deepbit.net's MinerPool
=================================

Installation of the cards running stock, gave me about 200-216 MHash/s each
   - POCLBM Flags ( -v -w128 )

I tuned the cards using ATITrayTool
http://downloads.guru3d.com/download.php?det=733

I have been running the cards stable at 985/600 for 3 Days, using POCLBM Flags ( -v -w64 -r2 -f1 ) and getting 300-306MHash/sec
The fans are running at 100%, and I have a box fan blowing into the open case ** Yes sounds like a jet engine **

GPU Temps sit around 60-63C

I'm trying to figure out how on earth some of the 5830 users are getting their memory clocks down to 300. As soon as I go lower then 550MHZ Memory clock, the card crashes.

Any thoughts on why I can't lower my memory clock speeds, or suggestions.

Thanks