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Author Topic: Guiminer flags for 4830/5750?  (Read 3836 times)
Aost
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June 16, 2011, 05:05:34 AM
 #1

Hi,
Are there any particular recommended flags for either the ATI 4830 or 5750 under guiminer? I don't intend to overclock either of them so as to not lower their life expectancy too much.
Also if possible could someone explain what the flags do? (ie. "-v", "-w128", "-k", etc.)

Thanks
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kylegates
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June 18, 2011, 08:57:13 AM
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Heck, i wouldnt mind an answer to this either.  Searching around I cant seem to find a good answer as to what the purpose of the flags is.
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June 18, 2011, 10:30:03 AM
 #3

-w is the worksize and as far as I know related to the memory.

you should try

-w128
-w192
-w256

and see which works best for you.

I have found that -v -w256 seems to work best on cards with unclocked memory.

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June 18, 2011, 10:31:49 AM
 #4

Hi,
Are there any particular recommended flags for either the ATI 4830 or 5750 under guiminer? I don't intend to overclock either of them so as to not lower their life expectancy too much.
Also if possible could someone explain what the flags do? (ie. "-v", "-w128", "-k", etc.)

Thanks

(The guiminer readme is available here: https://github.com/Kiv/poclbm)

-v enables vectors, which is faster on some cards.
-w is for worksize, and varies by card.

In general, you should look at the flags listed for the highest performing entry for your card on the wiki here:

https://en.bitcoin.it/wiki/Mining_hardware_comparison

where it appears that "-v -w 128" yields good performance on a 5750.

http://wallstreetcrypto.net
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June 21, 2011, 01:27:20 PM
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I would really like to know what the -f and -k flags are for. Thanks

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August 18, 2011, 05:55:31 PM
 #6

i just started playing around with an old 4830 i have laying around.i found the best is -v  -w128  -f1.i also found that underclocking the memory below 700  cuts the hash rate.At 750/700 i get 75 Mhash.The latest version of sapphire Trixx works with the 4830
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