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Bitcoin => Bitcoin Technical Support => Topic started by: Mikrouwel on June 10, 2011, 03:54:47 AM



Title: More MHash/s with 5870
Post by: Mikrouwel on June 10, 2011, 03:54:47 AM
Hi All,

I recently got into this GPU mining thing and want to know how I set my memory clock to 300 like all the other guys do on here?

I am getting about 405MHash/s with - v -w 128 -f 0

Thanks in advance

Mikrouwel


Title: Re: More MHash/s with 5870
Post by: mautobu on June 10, 2011, 05:52:57 AM
I'm using -v -w 128 -f 1, sometimes -v -w 192 -f 1, haven't seen much difference. I'm getting 435-450 avg, but that's also with Ati Stream SDK 2.1 (huge upgrade) and an oc of 1040 Core, 300 Mem, and 1.22 V.


Title: Re: More MHash/s with 5870
Post by: swusc2 on June 10, 2011, 06:00:15 AM
Don't worry about down clocking your Memory Speed too much. It doesn't increase hash speed directly. What it does is it gives a little bit more overhead since Mining doesn't actually require high speed memory. But if you want to push every bit out of your card you might be able to do it by:

1) Modifying MSI Afterburner config file (google it)

2) Modify and flash your bios to allow lower bound clock speeds (google it also)


Title: Re: More MHash/s with 5870
Post by: mautobu on June 10, 2011, 06:06:21 AM
Bringing down that mem clock can give a little headroom, maybe and extra 10 MHz out of the core, but well worth it.


Title: Re: More MHash/s with 5870
Post by: Mikrouwel on June 10, 2011, 03:07:15 PM
Hey Guys,

Thanks for the help :)

I am now running at 1000/165 @ 1.35 volts (yes I figured out to down clock mem :)). My temps are on 80C and at night the fan speed is audible but during the day it goes to like 50% but im not home so I dont care :)

I am getting a water block for my card in 2 weeks time so looking forward to that :D

Any way @  1000/165 @ 1.35 volts I am getting 420Mhash/s and using the 2.4 SDK drivers

How do you guys get 450MHash/s with only 40mhz more core clock than me?

And yes, I tried putting my ram to 300 and no I dont get any higher :D :D

Thanks a mil guys :)

Mik


Title: Re: More MHash/s with 5870
Post by: mautobu on June 10, 2011, 03:14:36 PM
1. Uninstall ALL ATI Drivers.

2. Install Catalyst 11.4

3. Install ATI Stream SDK 2.1

4. Profit.


Title: Re: More MHash/s with 5870
Post by: Mikrouwel on June 10, 2011, 03:22:06 PM
Dam, another 100mb+ download :(

Will let you know once ive downloaded and installed

Thanks
Mik


Title: Re: More MHash/s with 5870
Post by: Mikrouwel on June 12, 2011, 01:47:52 PM
Okay that 11-4 driver and 2.1k thing gets me the same Mhash/s :(

Also, what flags should I use when I leave my rig Mining overnight?

Thanks for the help so far :)


Title: Re: More MHash/s with 5870
Post by: Mikrouwel on June 12, 2011, 02:50:13 PM
Okay I just tried uninstalling all ati software and reinstalling again with 11-4 and 2.1 and wen I try and run GUIMiner  it wont start :(

It just says AMD Accelerated Parallel Processing at the bottom :(

Mik