[quote name=“RD65” post=“45270” timestamp=“1387243134”]
Ive got two Gigabyte R9 270x’s doing 410kh/s.
[/quote]

Is that 410kh/s per card?

Also, do you think there’s a difference between the R9 270’s and the R9 270X’s…

Price wise the X’s are a fair bit more but do not seem to pull all that much more hashes according to the [url=https://litecoin.info/Mining_hardware_comparison]Litecoin Hardware Comparison List[/url]

ESCROW will be accepted!

[quote name=“aatje92” post=“44896” timestamp=“1387179484”]
Why don’t you have a backup pool?
[/quote] I’m new to mining and I should setup a backup pool, I don’t want to pool hop but I guess a backup pool for things like this is a good idea.

Thanks for the reply , i actually installing ( i try ) on my ubuntu x64 , let’s see :-)

Cheers !

[quote name=“s2 bergen” post=“45059” timestamp=“1387208154”]
Hi, check this link https://litecoin.info/Mining_hardware_comparison - they have probably all Amd gpu’s listed.
[/quote]

Thats great thanks, I will take a look :D

Should be 11MH/s though… just restarted it :-)
Will be expanding some more rigs soon.

Just expanded the p2pool with another free server and pointed all my workers to it.

Take a look at the guide i’ve wrote up in the support section.

i been looking at these for awhile for some old boards with 1 1x slot i have laying around. they where $60

Theres a chance you can flash to 290x, but you would have to be very lucky. Only the first batch or so sold in November have had high success rate.

Also its possible that the warehouse staff know which 290 cards can unlock by flashing the bios. Several online retailers such as Overclockers have found in their stock all the 290 unlockable cards and sold them at a higher price separately, as they are no longer listing them to be sold separately, inwhich case new batches may not have the 290x shaders onboard.

Best of luck though, and excited for you if you get lucky.

Make sure to follow a good guide, and dont flash to just try it, you can find out definitively before hand. Also if its not possible then dont worry, for some people its not worth the 4% performance increase (32 khash), the instability, the potential bricking and the void warranty :)

Sounds like a bad oc to me

try cgwatcher. it can autorestart your mine when things show up as sick or dead.

Yeah it’s crazy, and thirdy part sellers and ebay are selling old cards for $500+

I just got SAPPHIRE 100363TXSR Radeon R9 280X 3GB 384-bit GDDR5 for $399. checked a little after, now sold out.

wow crazy fast, there was a 2 per person limit also.

Not over the moon about the price, but better than paying $500 for a second hand 7850 lol.

^ that is a sound plan
[url=http://forum.feathercoin.com/index.php/topic,4176.msg32399.html#msg32399]http://forum.feathercoin.com/index.php/topic,4176.msg32399.html#msg32399[/url]
look into that thread, If i remember doing my calculations correctly you should be able to ROI faster optimizing for power due to your crazy $/KWh…
I run 2 settings, the first is an optimized all out setting getting me 740KH/s per 7970 and the second is my quiet power optimized setting 660KH/s that drops temps about 12c.
[/quote]
^
This is exactly what i do. Because my wife doesn’t like the fans, personally find it soothing, I work in a server room a lot. Typically run my cards at 75degrees, at 650Kh/s fans at 65 or so. Anything above that and the noise gets excessive for the spouse.

Thank for the video, i agree with you entirely.

What i’ve noticed is that as long as my engine/mem speeds have a 450-650hz difference i’ll get good hasrates. So 850/1400, 925/1475-1525, 975/1600, 1050/1750, etc.

When i want them to run cooler i use the lower rates, and when i want more hashes i run the higher rates.

OK, just wanted to follow up on this. It seems that my issue was the amount of ram in the system. Not sure why sha256 seems to work but scrypt will not. Oh well.

I had 1gb and couldn’t get any scrypt mining to work. I swapped some stuff around and with 2gb I am able to get it mining using .conf files. It still will not run if I try to launch using .bat files with flags like I originally was. Fails with the same error as is posted above.

Anyway, I am just posting this in case anyone else comes across this as I was unable to find any good info on this specific error.

[quote name=“mirrax” post=“44601” timestamp=“1387111380”]
Maybe low quality soldering?
You can test with cheap multimeter if every pin is connected to opposite side.
[/quote]

Did that, every pin works end to end. Just strange! I guess I’m the only one whos had issues? I hope to get the powered cables in soon.

[quote name=“aatje92” post=“44530” timestamp=“1387096397”]
Each card has a different optimal setting so you’ll have to search for it. Basic values for 280x can be found here: https://litecoin.info/Mining_hardware_comparison

search for 280x
[/quote]

I did find this but I was worried about translating this right, So a basic setting should be

Thread concurrency - 8192
work size 256
Vectors - ??? (cant see anything resembling a -v)
Intensity - 13
GPU threads - 2? (assuming that -g parameter on the site)
With flags blank, I’m just worried about it frying my new cards, I accidentally left it on 7970 my last cards and ran it, It went for about 5 min at ~600Khs then restarted. Any ideas what vectors to put in?

Best.

Solved!

After morning meeting with my tech. department girls, we came to conclusion that cable was no good ! (look first picture)

So what we done is :
Reinstalled windows 8.1, disabled all protection shit they offering on, by default, turned off updates and so on …
Catalyst 13.9, latest ADM SDK, Cgminer, Cgwatcher, Trixx

And since my missing Gpu happens to be in PCI-E 1 slot ,so I did research about it. Eventually there is solution to force windows to “monitor” that slot constantly, which can be achieved by “short circuit the slot”, which works as many useres confirms. But however it scares me to burn down da house, with such experiments :)
So all it came up with adding non powered riser to PCI-E 1 slots instead of powered that was there since rig beginning. And now all seems work as charm, apart that 1 gpu is Little slower than the rest four. But honestly - I don’t care atm :D

P.S. 5x Sapphire R9 280x Vapor x uses 1336W, that’s according to my socket meter readings. Its under volted by Trixx to 1112v. I believe it will take a Little less in the future after I receive more non powered risers and increase the distance between cards, and reduce heat (so fan’s will draw less).

Thanks again for all your help guys .

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