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Topic: 2.2% regected shares high ? (Read 1151 times)

member
Activity: 97
Merit: 10
August 22, 2011, 06:44:23 PM
#11
join this pool https://bitcointalk.org/index.php?topic=33586.0;topicseen
accepts rejected shares
sr. member
Activity: 265
Merit: 250
21
August 22, 2011, 09:21:27 AM
#10
So after running at 8 mhz less I have found that overclock caused the 4x+ increase in rejected shares. It is easily losing some hashing speed for a lower rejected rate.
member
Activity: 97
Merit: 10
August 21, 2011, 02:42:20 PM
#9
you should try diffrent miners and run for a day to see which one haz the lowest rejection rate
sr. member
Activity: 265
Merit: 250
21
August 21, 2011, 08:51:40 AM
#8
I dropped the core clock on my card by 8 mhz. Seemed to do the trick down to 0.3%
legendary
Activity: 1246
Merit: 1011
August 20, 2011, 12:32:13 PM
#7
I have no idea whether or not it makes a difference but you could try forwarding the appropriate port in your router.
newbie
Activity: 45
Merit: 0
August 20, 2011, 10:50:09 AM
#6
that seems very high i have never had more then .20%, make sure you're in a pool with long pooling.
sr. member
Activity: 375
Merit: 250
<3 Bitcoins
August 20, 2011, 05:17:27 AM
#5
You should be fine I think its more a streak of bad luck in my opinion.
legendary
Activity: 1246
Merit: 1011
August 19, 2011, 12:20:55 PM
#4
I think it depends a lot on the server.  I think 1-1.5% is typical but you'd have to check with your specific pool.  That said I would personally consider anything over 1% too high.  I'm using phoenix and phatk 2.2 on two 5850s and they currently read:

[355.12 Mhash/sec] [5143 Accepted] [5 Rejected] [RPC (+LP)]
[377.12 Mhash/sec] [5411 Accepted] [8 Rejected] [RPC (+LP)]

so about 0.12% rejects.

Kernel versions can affect rejects and aggression makes a small difference too but the server was the key thing for me.  I mine with simplecoin.us which has just rolled out a serious new dedicated server (pool.simplecoin.us).  Big pools use several servers so perhaps try switching between them.

Also, I don't believe phoenix discerns between shares rejected because they are old and ones rejected because they are invalid.  If your rejected shares are clustered around/after new work units are pushed then try different pools/servers; if they are scattered at random then try lowering your cards core or RAM clocks and/or trying different kernels (there's plenty of variation between all of Diapolo's and Phateus' phatk versions).
legendary
Activity: 2730
Merit: 1034
Needs more jiggawatts
August 19, 2011, 12:06:56 PM
#3
I would say over 1% is high
member
Activity: 97
Merit: 10
August 18, 2011, 03:53:58 PM
#2
well it does seem a little high because i get around 1% rejection rate on my 5830 with cgminer
but 1-3% is normal
sr. member
Activity: 265
Merit: 250
21
August 18, 2011, 01:11:14 PM
#1
So I am using 1.61 phoenix with phatk 4% increase powercolor 6850. Does this seem high?
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