Author

Topic: 7850 numbers can't seem to get over... (Read 594 times)

newbie
Activity: 2
Merit: 0
May 01, 2013, 03:45:16 PM
#8
I have de same card and also get the same range... Under os x
newbie
Activity: 9
Merit: 0
Seems a tad low (but not that much).

According to https://en.bitcoin.it/wiki/Mining_hardware_comparison common range is 300-375 so you are in range.

Rick
newbie
Activity: 11
Merit: 0
Put the gpu at about 1100 and the memory at 900 there is an example that is pulling 330MHash/s at http://www.brandonorndorff.com/bitcoin/mining/radeon-hd7850-7870-cgminer-config-settings-bitcoin/
newbie
Activity: 6
Merit: 0
April 26, 2013, 05:48:25 PM
#5
getting 610 khas/s with this on Saphhire 7950:
--scrypt -I 20 -w 256 --lookup-gap 2 --thread-concurrency 24000 -g 1  --gpu-engine 1100 --gpu-memclock 1500
jr. member
Activity: 46
Merit: 10
April 26, 2013, 12:24:38 PM
#4
Well, i'm no expert, only have 5800 and 5900 series cards, but gpu-memclock seems high.

Does the 7850 need such high gpu-memclock?

Seems that people clock the memory to 800/900 for that card.
https://en.bitcoin.it/wiki/Mining_hardware_comparison#Popular_Mining_Cards (scroll or search page for 7850)

maybe give that a go.

With mine it was a case of trial and error untill I found  GPU memory and voltage settings that were stable.




member
Activity: 84
Merit: 10
Mine Litecoins.
April 26, 2013, 12:45:17 AM
#3
Win7 64 bit

Not overclocking at all.

-i 7 --auto-gpu --gpu-engine 1100 --gpu-memclock 1350

I have played with a lot of different settings.  I just cannot seem to get it over 310 range.
jr. member
Activity: 46
Merit: 10
April 26, 2013, 12:35:06 AM
#2
What overclocking settings are you using?
What OS are you using?
What custom switches are you using?
member
Activity: 84
Merit: 10
Mine Litecoins.
April 26, 2013, 12:18:49 AM
#1
310 mhash range.  No matter what setting I do.  I cannot seem to get the card over 310-315mhash range on a steady basis without crashing the rig.

Anyone else able to get better numbers?

What are you using?

I use CGMiner.
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