Bitcoin Forum

Hi guys!

I'm currently mining LTC at coinotron - getting around 550 khash out of that card. I'm not really too satisfied. before I went to bed last night I was mining at givemeltc, with intensity at 20. that got it around 610 khash according to CGwatcher. but It would seem it crashed shortly after I went to bed..

my settings for mining atm:
cgminer.exe -o stratum+tcp://coinotron.com:3334 -u user.1 -p pass --thread-concurrency 8192 -I 13 -g 2 -w 256 --shaders 2048 --scrypt

What would you suggest?

mmh how much you get now?

overclock it at 1100, ram the same, and same string configuration

Overclocking didn't make any change at all. topping around 570 kh atm.

I have some Saphire R9 280x Vapour-x cards using these CGMiner settings, they give me 740Kh per card and run at 70 degrees.

cgminer --scrypt -o http://wdc.coinmine.pl:9090 -u username.1 -p x --lookup-gap 2 --thread-concurrency 11200 -g 2 -I 13 -w 256 --auto-fan --gpu-fan 30-75 --temp-cutoff 90 --temp-overheat 85 --temp-target 72 --gpu-memclock 1500 --gpu-engine 1080 --gpu-powertune -20 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

Thanks, I will test this when I go to bed! I get around 650 atm, after I disabled Aero and changed to XP skin.

mmh, i'm starting to think you are in cpu bottleneck

Does your sapphire card have one or two 8 pin PCIe plugs?

I have several of each. The ones with 1 6 pin and one 8 pin do 750kh/s on these settings.

tc8192
lookup gap 2
worksize 256
engine 1050-1080
-g 2
-powertune -20

The ones with two 8 pin power plugs like settings similar to what MisO69 posted, namely the 11200 TC but my cards manage ~715kh/s at 1025-1040 engine. Anything higher devastates my hashrate.

These cards are kinda picky, no two cards of mine run the same at the same engine clock. Most of mine are within 5-10 Mhz of each other.

I shouldn't. I'm running I7-3770k at 3.9 ghz.

Am I really?

No. Absolutely hilarious to suggest that though. I have 6 cards running 715kh each on a $40 G1610

I have even some worse AMD CPUs that cost 15-20$ each.

OP, you should get at least 700.

ah yeah forgot, that this is mining not gaming   ;D

Aren't you guys having trouble with VRM overheating ? Right now I can't push Intensity over 13 or else VRMs get over 110°C and GPU gets throttled to 500Mhz.

I'm getting 1060 KH/s @ intensity 13 with 2 of these.
I tried everything to cool the VRMs down but even with 4 120mm fans pointing directly at the cards intensity 13 leaves the VRMs at a steady 106°C so i guess it's my limit for now.

(Temps from GPUZ)

You shouldn't push past I13 anyway, every single 7970/280x I've worked with does best on two threads. When using two running more than I13 is nothing but hardware errors.

The VRMs are HOT! I think anything under 125c is OK.

I'm now getting 720 khash! Thanks boys!!

With what parameters?

cgminer.exe -o stratum+tcp://coinotron.com:3334 -u user.1 -p x --thread-concurrency 8192 -I 13 -g 2 -w 256 --shaders 2048 --scrypt --lookup-gap 2 --gpu-engine 1050
-powertune -20

Are my parameters. Using CGWatcher to make sure I'm not getting hardware errors. and this seems to be THE setting for me.

--lookup-gap 2 did it for you, try to rise the clock to 1100, you should get 750

Good, now do more optimizing and OC to get 750.

Hi,
my configuration file for Sapphire R9 280x Vapor-x (720kh/s):

"intensity" : "13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "0",
"thread-concurrency" : "8192",
"shaders" : "0",
"gpu-engine" : "1050",
"gpu-fan" : "0-85",
"gpu-memclock" : "1500",
"gpu-memdiff" : "0",
"gpu-powertune" : "5",
"temp-cutoff" : "85",
"temp-overheat" : "77",
"temp-target" : "63",
"api-mcast-port" : "4028",
"api-port" : "4028",
"auto-fan" : true,
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"

Can someone help me how to pick up a little more speed? When I go to increase the gpu-memclock or  "gpu-engine"  speed go down,
Can you recommend something else?
Thank you in advance.

As you can see below I prefer a quiet machine above a high hash rate..

http://i57.tinypic.com/2whfdki.png

Between the 2 cards I installed 2x - be quiet!- Silent wings 2 for some airflow..

http://i59.tinypic.com/hs8k7o.png

And this is my config in combination with Sapphire trixx vddc:1137 (what I need to set every restart)..

"intensity" : "13",
"gpu-engine" : "1025",
"gpu-fan" : "39-85",
"gpu-memclock" : "1500",
"gpu-powertune" : "-20",
"temp-cutoff" : "90",
"temp-overheat" : "85",
"temp-target" : "71",
"thread-concurrency" : "8191",
"auto-fan" : true,
"expiry" : "120",
"failover-only" : true,
"gpu-threads" : "2",
"log" : "5",
"queue" : "1",
"scan-time" : "60",
"temp-hysteresis" : "3",
"scrypt" : true,

I have some new info, well old for me. I should have posted here earlier.

I got a few more of these cards and found that they had different memory manufacturers, thus needing different params to run. The 8192 tc and 2 threads seems to be the correct setting but the VRMs were running at 110 degrees! hot as hell. You guys need to load GPU-Z and check the VRM temps of your cards. If you haven't flashed them with optimized bioses from the litecoin forums you may be burning up your cards.

After identifying the memory as Elpida I found modded bioses by a user named Stilt. You can find them here : https://litecointalk.org/index.php?topic=12369.msg93754#msg93754

That thread has all the information you need to know to correct this problem. With the modded bios my VRMS (voltage regulators) are running at 60 degrees. The memory settings are also tweaked nicely for 1500/1044 allowing for undervolting 1.088 or less. The cards run quiet, cool, efficient and produce 725Kh/s with these settings.

--lookup-gap 2 --thread-concurrency 11280 -g 2 -I 13 -w 256 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

Memory 1500
Core 1044
VDDC 1.088

http://s27.postimg.org/sq8r4xo9v/Untitled.jpg
 +
disable ulps settings.

(this is the r9 280 sapphire toxic card)

You're a superhero man these settings are awesome! I'm getting 720Kh consistently. For some reason though auto-fan is messed up for me. It actually goes down as the temp goes up. All good though since Sapphire Trixx maintains fan speed just fine. Mine is the 7970 Vapor-X which is the same card. I've had it for a while but I just started mining. Only 1 card though but it's still fun. Thanks again!