I get 2.95 with a ref R9 290 non x

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Hi there!

So, I got 6x R9 290 spread over 2 rigs, and for a while now, when using x-11 miner (sph, drk miner or even the new one from lasybear) I have noticed that 1 random card always have those weird fluctuations more than others and as such, hashes slower. Usually the fluctuation on that specific card just get worse in time and as such, the hash drops even further.
Now, when I say random card, I really mean it, sometimes its card number 1, sometimes number 2 and sometimes number 3. Mostly 3 though and it shows like this:

 GPU 0:  71.0C  72%    | 3.662M/3.638Mh/s | R:  3.0% HW:0 WU:0.054/m I:19
 GPU 1:  65.0C  66%    | 3.613M/3.628Mh/s | R:  1.8% HW:0 WU:0.052/m I:19
 GPU 2:  66.0C  67%    | 3.222M/3.284Mh/s | R:  2.9% HW:0 WU:0.044/m I:19

As you can see, card #3 hashes at 400kh/s less than the other 2.

Here's a screen shot of the fluctuations I'm talking about:


I tried different configurations and I would try changing some hardware, but what I didn't mention is that both rigs are completely different with the exception of the cards and the PSU (1000w Corsair).
1 rig is made out 8gb ddr2 ram, asus motherboard and amd cpu while the other rig is made out of a 8gb ddr3, gigabyte motherboard and intel cpu.

*Note: When mining Scrypt or N-factor coins there's no issue whatsoever.
Oh and I forgot to mention that while using girinos miner (the 2% fee one) than half the times I manage to get the cards to run just fine while in the other half it's similar to what I wrote.
** I've tried powertune +20,+40,+50 but haven't seen any change.

Any ideas? Been at it for some time now...

So, got 2 rigs each with 3x r9 290 and the 3rd card in each one always reports lower hashrate with this miner (tried using all the versions posted here)
Here's how it shows:

 GPU 0:  71.0C  72%    | 3.662M/3.638Mh/s | R:  3.0% HW:0 WU:0.054/m I:19
 GPU 1:  65.0C  66%    | 3.613M/3.628Mh/s | R:  1.8% HW:0 WU:0.052/m I:19
 GPU 2:  66.0C  67%    | 3.222M/3.284Mh/s | R:  2.9% HW:0 WU:0.044/m I:19

It's identical in both rigs (first 2 GPUs are 3.6mh/s while 3rd one is 3.2mh/s). Tried swapping cards location, playing with configs, numerous restarts, but nothing helped.

When mining Scrypt, n-Factor or x-11 using girino's they're all stable (getting 3.6mh/s with girino's as well)

Any ideas why that is happening?

Likewise, just got it this morning.

Sounds good but will need a Windows version as well as some software guru to check the code out, see that it's clean

It's easy to compare scrypt performances between whatever, your problem, which is the difference you are seeing between rigs, is due to the amount of errors you're getting, which is a lot. In fact, everything > 1 is bad. You should have 0 HW errors.
Go over your config and readjust it to fit your cards.

And here I thought that the tradeoff is that you in fact don't know for certain when they will deliver or even if they will. 

Gridseed, although I think it's garbage as well, is at least real and can be bought immediately.

Not sure what's with all the hate here but I actually liked your reviews, because in essence you're showing that excecpt for Gridseed everything else is vaporware (for the time being) and as such should be treated with caution.
Can't blame you guys on the quite empty reviews tbh, not much to go on with all these "companies" - lots of "news" but no products.
And don't mind phzi, he's invested in Alpha-T, so it's obvious why he's irritated when he reads bad news about them.

Read up from when I made this thread and understand how forums work...

1. Your answers are wrong.
2. You necro'd a half a year old thread, congrats.

The 290 consume anywhere between 225w to 375w depending on how you under/over clock them. So yo answer your question (was it a question?): yeah, you could, so long as you're not planning on overclocking it and you make sure you undervolt it.

I'm talking about scrypt / n-factor algos. With x11 I reckon 1k PSU can hold 4 cards, but you're gonna limit yourself to only x11 coins.

I got 3 of those with a 1k PSU and its fine.
but it won't hold 4 cards unless you do some serious undervolting & underclocking.

I spoke to eXtremal and he said he'll keep it open source.

Are you using 13.12 drivers? Gotta use 14.4 drivers...

And dunno about you, but when I run the numbers, I lose an extra 10% of my coins somewhere. Either Claymore is taking more than 10% or yool just steals.
This miner gives me a higher net.

gl

This is fine.