Topic: Good Speeds on Sapphire 5830's 311.4MHash/s (Read 24161 times)

The stable core clock is i think by luck. I have 6 of them and not everyone runs at the same speed. For example

1015/325 - 323M#/s 74C Fan 60% - unstable for 1020+ (freezes the PC)
975/325 - 311M#/s 76C Fan 66% - unstable for longer period of time from 985+ (The drivers turn off and the card is not mining. stays on 0% GPU load)
965/325 - 308M#/s 78C Fan 69% - above 965 it gets unstable

These above are in one case. From top - the cards have better air flow. Space between is one pci/pcie slot. Two 120mm fans blowing out the hot air from the back end of the cards. If there is one 120mm fan blowing in the air on a side of a card to the fans on the cards it gets - 2/4 C depends on card (the first cards temp stays the same)

The other rig is

930@275 - 298M#/s 77 - 80 C (depends on the outside temperature) Fan 76% - Can't really tell whats the stable core clock (its running at low core clock because the heat is killing the card, its in close position to another cards so the temps are very high)
1006@315 - 319-321 M#/s 76 - 78C Fan at 66% (Its stable above these settings but the efficiency is poor (it gets less accepted and many rejected)
1015@315 - 321 - 324 M#/s 72 - 74 C Fan 54% ( unstable for 1020 +)

For this configuration there is only one 120mm fan blowing out the heat from the first and second card. ( i found that blowing out air is better than blowing in - of course best combination is blowing out and blowing in - but I dont have a fan for that jet.

Anyway if someone would be interested in software settings they are the same for all rigs:

Win7 64x
Phoenix 1.5 with phatk kernel 2011-07-17

-a 5 -k phatk VECTORS BFI_INT AGGRESSION=13 FASTLOOP=false (for phoenix worksize is default for the cards witch is 256)

catalyst 11.6 SDK 2,4 (tryed 11,7 sdk2,5 but one of my card didnt worked and the speed was poor for my settings)


PS. ohh and the voltage is stock

It's very likely. I bought 5 cards. One is good to 1025MHz stock volts, other is only good to 955MHz, regardless of voltage.

I'm getting about 311.6 to 312.2 or so sustained on one of my 5830's.
975mhz gpu, 320mhz ram, stock voltage.

My other two are in the same box and I have trouble with them past 960mhz.. so those I get 305ish on.
I'm sure if I was willing to up the voltage and push the clock harder, I could get 320mhashes... but I'm not really into frying video cards.

That's weird maybe I just got a good batch?

Stock voltage 1.163v, maximum stable core is 985 at same temperature. I needed the bump to get it stable.

You shouldn't have to change voltages in order to get that speed. I have 1030/350 for the same card as yours with no overvolt and I'm getting 333.88. If I go with your speed no overvolt I get 327.36. Try these settings:
phoenix 1.5
phatk from Phateus(7-29)

325.2 MHash/sec
Sapphire 5830 Extreme
1010/370/1.175v
70c
GUIMiner v2011-07-01 / phoenix / diapolo modded phatk 7-17
VECTORS BFI_INT WORKSIZE=256 FASTLOOP=false AGGRESSION=14

I have 2 5830's running at 311~mhash as well now, thanks

I made a quick guide to MSI Afterburner unlocking extra OC features ... very simple :

http://vivithemage.com/2011/03/enabling-unofficial-overclocking-in-msi-afterburner-2-1/

Thanks, i'll play with it when I get home ... i'll have 4 cards in one rig, so we'll see what happens .

I run my Sapphire 5830 core at 966 MHz and the Memory art 325 MHz.   I actually get faster hashing speed when the memory runs between 300 and 350 MHz than the default but it crashes if I launch a game.   I think that the sweet spot is tightly related to your core speed.  Some people are obtaining better performance at other mem speed but 325 works best for me.

I haven't changed the voltage, MSI afterburner won't let me do it on this card.

Yup, but what should I clock down to save power, but keep up mhash?

Vivi : you can use msi afterburner.  Follow this guide : http://bitclockers.com/forums/index.php?topic=5.0

It requires you to install msi afterburner and then edit a couple of lines of the cfg file.  To get the memory clock below 500 you may have to move it to 500 and then close the program and open it back up to get it to lets say 300 or below.

how does one downclock the memory, to save on power consumption but keeping output high?

I do not want to flash em, I have 4 running in a rig.

You should really try using poclbm.  With 930 core and 190 mem I can get 297mhash.  By the time I bump it up to 960 core, I'm just over 300mhash.  I just use the standard settings for a 5xxx card on the GUI miner.  For whatever reason, 180-190 mem was a sweet spot on my card.  If the card isn't next to another one, I can get it up to 970 core, getting 312mhash.

bring the memory clocks down to 300-350Mhz. Saves a lot of power and the card stays cooler. You should also apply the phoenix tweaks to speeze out more MH/s or try playing around with agression and worksize. My cards are giving me 285MH/s @ 900Mhz core.

MSI Afterburner. Enable unofficial overclocking by editing the config file. Afterburner will appear to only let you take the memory so low, around 525 Mhz at first. Close it down then reopen it. Now you can take it down even lower, to around 260 MHz. Close it down, reopen it, set to 225 Mhz.

Thanks for the info. My 2 5830's are in about the same ambient temp and setup (they are in a case, but I've got external fans going on them).

I wrote a little monitor that will help tell ya the info in a screen session (http://forum.bitcoin.org/index.php?topic=13855.msg188817#msg188817), or if you you have access to a terminal:


Up to you if you're in the mood to do it

The HIS sounds nice. I'm going to try to replicate your results on my Sapphires next chance I get.

On the one running at 1040/340: 70-75deg F. Open comp case with a big fan blowing air in and the card's fan on 80%. By stock voltage I mean it's factory default (not exactly sure and i'm too lazy to reopen the remote session to check). This HIS card is a champ. Chip stays below 70c.

On the two sapphires, they are in a regular pc case and run a little warmer. They are running at about 80c with 65% fan.

How did you get your mem down that low on the 6870?  Did you flash the bios?

If I may ask, what's your ambient room temp for this mine, and how hot are the chips getting? Is your 'stock' voltage 1.163?