Topic: 5870 - 470 mhash 24/7 & Rig Advice (Read 2495 times)

clocks? volts? your ss is blocking stuff

Just added a watercooled 5970 to my rig.

 

1 GHash/s on a 5970, F**k yeah

<60c is excellent temps, you shouldnt worry about 100% fan at those clocks either, that card is purrrring.

clock isnt "under" 1000, but i get 460-461mhash at 1000/199 @ 1.163v (stock voltage for performance level 3 on non-ref gigabyte card)

That may just -barely- be possibleActually, it is. Heres a screenshot, and config used. Win7 x64, 12.1 driver, 2.1 SDK, Phoenix 2 miner. 5870 @ 990/365/1.187v in my main PC, ran for a short time to confirm its possible. I have previously ran it at 1035 core, but only when its headless.



BTW, OP, you shouldn't need so many volts. Start at stock volts + underclocked memory (350 is fine considering your target. May need a little higher) and start at say 950 core. Bump by 10 (or 5 for finer tuning) every time its stable for about 2 minutes until it crashes. Increase voltage by 0.0125, and repeat. I really wouldn't go much higher than 1.2v. You shouldn't see much of an improvement, if any, unless your ambient temperatures are subzero since the increased temperatures will just cause failures earlier. I have personal experience with this (northern wisconsin, outside rigs). The mian driving facotr is you have to keep it COOL.

Heres a picture where it must've been about -30C outside. You'll note one of my 5870's is running "hot", because the heatpipes literally froze and was unable to carry heat away from the GPU core effectively. The super fast 5870 was using a reference cooler. The "hot" 5870 was using a Zalman VF-3000A cooler, but also note  I only needed 1.175v for 1035 core speed. You may be overvolting your 5870 too hard and needlessly.

I want that magic set of tweaks which would give me more than 460 Mhash per 5870 with the clocks under 1000

975/195 yields me 445mhash/s with phoenix and phatk2

sdk 2.4


oh, for my stock cards, i always run my fans at 100% now too.. since i have 3 replacements just sitting here waiting to be used.. would be a shame for them to go to waste

I have 12.1 drivers SDK 2.1 with 970 core and 300 mem clocks, my 5870 gets only 429 MH\s with diablo and 400 MH\s with phatk. I use CGminer 2.4.3

I have 3X6970  1 X 5870

All have been running with 100% fan for 12 months.  No problems, smooth as a baby's butt.

Running a fan at 100% shouldn't matter as long as it's running consistently and not stopping and starting frequently.

I'd be more worried about a fan at 50% that stops and starts several times a week than a fan at 100% that runs 24/7.

thanx! Any CGminer flags or stock config? Phatk or diablo?

Driver version is 11.12
SDK version is 2.1

I installed the SDK by unzipping the EXE and only installing the one .msi file.

EDIT: I changed the OC on the 5870 to 1000 MHz now just to be safe. It's getting ~ 465 MHash/s now.

Hi! Nice performance for 5870! Could you please tell what are your Catalyst and AMD App versions/ Any flags for CGminer, what kernel or stock settings?

Thanx

All my warranty has basically ran out.
What is the best setting to run my fan on?
Or should I just by a backup fan for the reference card (only the 5870)?

Thanks.

EDIT: For the reference 5870 I've set the fans to run at 80% now.
That should be safer shouldn't it? I really don't want any fans to fail.

Not really. There are people with like heaps better rigs.

But do you think I am pushing my 5870 to hard to run 24/7?

Hey guys.
I've just added a 5870 about 3 days ago, and been playing around with the overclocks on it.
I am using the following settings on the 5870:
Core: 1020 MHz
Memory: 350 MHz
Voltage: 1.250

Fans are ALWAYS at 100%. Yes it is a reference card also.
Ambient temp is usually below 10C. I live in Melbourne and this rig is in my garage.

This basically gets around 470 Mhash.

Also here is the rest of my rig, I have another 5970, so I was wondering if the 5970 is going alright.
I am using the following settings on the 5970:
Core: 840 MHz
Memory: 300 MHz
Voltage: 1.062

This card is reference, but with an AC Accelero Xtreme, hence the bad vrm temps.

Here is a screeny of the rig:


Also the PC specs if anyone wants to know:
MOBO: Gigabyte 990FXA-UD7
CPU: AMD Sempron
MEMORY: 4GB - Some red G.Skill, not Ripjaws

PSU: Seasonic X-1250W

Driver: 11.12
SDK: 2.1

I will be adding another 5970 in about 1 week, but it will be watercooled, so I was thinking about pushing that puppy hard.

Don't worry about electricity, it is not a problem.