How much of an improvement is expected when moving from stock ethminer/catalyst 15.8 to Claymores 3.3/catalyst 15.12 ?

Has anyone encountered the following problem?

I am unable to use PCI-e 16x to 16x (powered) riser cables on a motherboard. The MB in question is Asus Striker 2 Extreme (with latest BIOS). I tried all three PCIe 16x slots with two working riser cables and three different graphic cards, all that happens is card fans spin up to max. There is no picture (if used in Slot 1) or the card won't be recognized in Windows. The PCIe slots do work without riser cables.

What difference there is between using a riser cable and not using one, from MB's perspective?

Is there anything I can try to fix this?

Is it really necessary to use 16x cables on 16x PCI-e slots?

How many coins would you get a day on 280x?

How many coins would you get in a day on a single 280x?

Edit: Nevermind

You people who have to pay much for electricity, have you tried extreme undervolting these cards? I tried this briefly on a single r9 290 setup, pulling just 229 watts from wall under mining (55 watts idle). The performance hit wasn't too bad (something like 30% decrease of performance for 100% decrease in power consumption):

Is it just me or did the introduction of scrypt asics actually make scrypt coins less valuable

I guess so.

No immature coins whatso ever. I'm giving up on solo mining, made 0 profit in almost 3 days.

Ok im seeing Total/Valid blocks 1 / 1 now. So I found a block?

Still no change in wallet balance though, maybe it takes a while to update?

Edit: i'm using Claymore solo edition wallet but in readme it now says: 1. Use official Primecoin wallet with this miner. Should I switch?

49h solo 3x 290.. no blocks with combined average CPD 8.

Trying the 3.1b for couple days, going back to pooled mining if I'll find no blocks.

Edit: I'm getting TRT values of about 245 per card (1150mhz core) is this normal?

9911, the one most used by primecoin network.

Ok I'm seeing 21 active connections now on my wallet, here's how:

Keeping the port closed when starting the wallet, open it after 5 mins or so. In couple hours, the connections shoot up.

Bah I'm confused with the nodes thing.

Started solo mining, reached 8 connections in an instant. Read the guide, says having 8 connections is bad and I need more. Couple hours of tinkering with my linux router and opening port 9911 for both TCP and UDP => getting 6 connections now. Tried adding some nodes to the primecoin.conf file, doesn't seem to help. Keeping the port closed gets me more connections, any tips?

Here's the peerinfo from debug window: http://tny.cz/ce42f425

I find it strange that from all the peers I'm connected to, none has "IPV4address:9911"

Edit: here's the getpeerinfo with port closed, very different looking peers: http://tny.cz/2ecf7789

Wow, version 2 really improved performance.

3x 290 version 1.4 = 256k ch/h (4chain)
3x 290 version 2 = 470k ch/h (4chain)
=83,6% increase in mining hashrate

And lower cpu usage as well Def. keeping the fee on.

Ok I just increased the core clock to 1200 mhz, im getting 95k ch/h (4ch) and round times of around 490. The nice thing is im still using less electricity than mining scrypt on stock clocks.

This information is not correct. I am seeing an increase of 16% in mining speed. My 290s now mine at 80k each.

Edit: Getting total round time of 570-580, varies a little card by card, cards running stock clocks. Using I7 4770k.

jam3zs you should increase voltage or lower engine, simple as that.

Btw, we have reached moon it seems 

http://middlecoin2.s3-website-us-west-2.amazonaws.com/

Wow, thanks! The pools seem to be quite unstable at the moment, since my miners are switching between eu and us servers every few minutes. The script seems to work fine though. Btw, what's the function of that "timeout /t 30" at beginning?

Is it possible to do this without editing the .conf file? I wouldn't want to bother doing that. Would I have to change the startup command if I did edit the .conf file?