So that you don't have to stick a fork into your rig every time you have to reset it or power it on, try out these front panel connector button replacements.

They have saved me a ton of effort!

Ensure you have fully wiped out your current driver platform using the AMD CP uninstall program. 

Lots of problems occur when a new installation conflicts with artifacts from the old driver platform.

I will tell you right now: that HD6450 is a worthless card as a miner and is mucking everything up.  You need the newest drivers for that 270x, and they do not like that 6450 at all.   I had a 5450 (which is basically a 6450) a while back and had a hell of a time getting it to work with some 7950s, and that was even with older drivers.

I would take out the 6450, uninstall your AMD drivers from the CP to clear out the platform, and reinstall the 13.12 Catalyst + 2.9 SDK.

Your first bat file sample looks good, except -i20 will give too many rejects - try -i 19.


A question though: You are using --gpu-platform 1.  Are your Radeon cards behind an intel integrated GPU or an NVidia card?

Try the Catalyst 12.6 drivers + 2.7 APP SDK.

I've attempted 2 6 card 270 rigs in Win8.1 x64, and none of the drivers would initialize all 6 cards into sgminer for mining.

The 6th card was always error 43'd out, no matter what i tried.

Sorry, got off track by the FUD.  My appologies 

If you mean, mining while gaming...then no.

If you mean mining while not gaming, sure.  Even during daily non-gaming use, you could set your intensity low and when not using you could set your intensity high.

 

Investing in mining gear = hedging your risk.  If BTC goes south, you can always sell your hardware off and recoup at least something.

Investing in coins via fiat = going in nekkid.  If BTC goes south, you're completely screwed and out the whole bit with no recourse.

Parameter is the value assigned to the flag.

i.e. --shaders 2048, 2048 is the parameter.  

Remove the entire --shaders 20481 part.

I have no issues with law enforcement oversight. Law enforcement oversight != regulation.  I have no problems with law enforcement knocking out SR type sights / people on them.

I do have issues with financial oversight (regulation) by governments that are hypocritical and motivated by corruption.  Eliminate the conflict of interest, and i'll happily pay my bitcoin tax.

The 2 forces of government and law enforcement cannot be disjointed, as law enforcement is a subdivision of the authority vested by God into governments, but the conflict of interest must and will be eliminated...and bitcoin will be that tool which does it.

That being said: bitcoin will survive.

This latest chain of events highlights the 3 worst things that could ever go wrong with the currency:
#1 Protocol issue: Being fixed, and once fixed.. will demonstrate just how "simple" it is to "fix" the protocol: try that with a fiat system.
#2 Major exchanges going down:  Will obviously be coming back up.  See what happens to fiat when the 2 largest banks in the world go offline for days.
#3 DDoS: is being mitigated: See what happens to fiat when the global banking system is hit by DDoS over a period of days.

In SGMiner:

setx GPU_MAX_ALLOC_PERCENT 100
+

Need your mining config...but:

I doubt it's a miner config issue or a hardware issue: The miner does start up and run for 10-15 minutes as you specify.  If it was either a miner config issue it would error out immediately, or if it was a hardware issue, it would freeze up automatically or within seconds of mining commencement.  Still need your miner config though.


Very good chance it is your driver pack.

I would try out the Catalyst 13.4 drivers + 2.9 SDK.  I had great luck with that specific combination for all my 7950s / 7850s.

Uninstall your latest driver pack through the Control Panel add/remove program.  

Remove the --shaders parameter.  --Thread-concurrency overwrites it when specified.

A very interesting card to me!

It is a 7850 with better ram.  Same texture units / ROPs / memory bus, but 1400mhz ram.

I could hit 400khs on both of my old 7850s but it took nothing short of 1200+ on the core @ 1250 ram.  Seeing how well the 270 does with the quicker ram, i would dare say this thing will do 425-450khs without too much trouble.

Expect this card to be the new performance / watt king.   I would ever hazard a prediction that many will get this card to around 100w (stock is 150w) pumping out 400khs+.

MSRP is one thing, current retail prices are another.

280xs are going for 400+ easily, closer to 500.. at least over here in the USA.

Even the 270s are 220-240.

I've found TC 10240 up through 24000 to work well on my 270s.  Anything less and it was HW city.

My reject rate on MC has been unacceptable high.  And i am running all 7950s / 270s @ -g 1.

Trying out the -E 10 -s 5 -Q 0 settings.  I'll post the results after a 24 hour sample period.

For one thing, remove the --shaders line.  --Thread-Concurrency when specified overwrites the --shaders parameter.

May wanna up the volts in small increments on the card that goes sick immediately. 

That's basically the card telling you it will work, but needs a little more powar.

Sick usually means the card can't handle the load. 

Are your cards running stock?

CGMiner has known issues running -g 2 thread cards with -g 1 cards, aka 7970s with 7950s.

Try SGMiner with the same parameters, less the --scrypt option.

SGMiner link is in my sig.