Bitcoin Forum

Just taking a poll as to see what people are running..

Currently I have C 12.8, which I believe comes with sdk 2.8

I'm running cgminer on a sapphire 7970 oc'ed

settings:
gpu = 1183
mem = 1040
v = 1243
boost 20

temp is around 72, with fan speed of about 83

pulling in 702-698~

13.1 which comes with 2.8

Stock 1100MHz, with 950 memory, 1.256V, Powertune set to default, and 80% fan, 66C @ 661MH/s.

nice on the temp.. what card are you using and do you recommend it..

At that voltage you should be able to push to 1040 maybe.. not sure what settings you tried.

I'm using the Gigabyte TriForce one. Giant heatsink, with 3 fans. The VRM temps are a lil higher than a stock, but that's to be expected, and not bad. I can OC to ~1200MHz for 700+MH/s, but it uses a lot more power. I used to undervolt at 1050mV for 1050MHz, and the temps were like 50C @ 50% fan. It was nice.

Default Powertune?

My 7970s really like +20.

Ya I've always left the powertune alone. I think the Gigabyte I have runs with a little higher voltage to accommodate the stock 1100Mhz, so I've never had any issues. Should I try upping it to 20?

Yes, depending on your local conditions (temp and $/kwh).  It will run hotter and draw more power but give you a nice bump in MH/s.

Ya I don't notice any difference using CGMiner to change the PowerTune anywhere from -20 to +20. I have it at 1100/950/1.256V/80% fan. Stays the same 661MH/s.

Catalyst 13.3 Beta 3
OpenCL: 10.0.1124.2

7970
1000/300 (1.050v) ~ 601 MH/s
Max temp: 37°C

1010/300 (0.987v) ~ 608 MH/s
Max temp: 37°C

1050/300 (1.010v) ~ 635 MH/s
Max temp: 38°C

7950
1100/300 (1.024v) ~ 577 MH/s
Max temp: 38°C

Win 7 x64 SP1, no updates.  Catalyst 12.8 with all the crap installed and default SDK

Pair of Diamond 7970 voltage unlocked but running stock voltage
1175 Core/200 mem/1.112 v (stock) - 703MH/s per card - cards range 68C to 86C.

The rooms runs between 80F-105F depending on if AC is running - we can't all live inside a fridge like Tacotime  :P

1070/1200
stock volt
max temp 72
700MH/s steady

1200 memclock seemed to be the sweet spot, uses slightly more power but seems worth it for the extra hash rate. Cards are happy.

You either need to post your OS, driver, SDK, miner version, and all of your command line arguments/settings, or I'm gonna call BS. Everyone else needs close to a 1200 core speed to get to 700MH/s.

Ah! You found a typo - well spotted..... ;)

1170/1200, not 1070

As for the rest:

Xubuntu 12.04
Driver 12.3
SDK 2.6
cgminer 2.11.3

Has anyone done tests between windows and ubuntu.. as to whats more stable or better hash rates.. obviously windows is easier to set up.

I'm also seeing people using the latest cat drivers 13.1 reporting good results.

So also whats the deal with memory..

some people say to keep mem 150 lower than gpu clock.. see memdiff setting in cgminer..

My by default has a gpu clock at 1000 and memory at 1450.. just sorta kinda trying to figure out a good combo.. of course this requires some serious babysitting to see when it goes down.

Lower memory is better for temps and power usage. Higher memory does not affect hashrate. CGMiner uses the standard ADL, which cannot clock the memory more than 150 below the core engine speed. Other tools like MSI AB can. I ran my 7970 at 1050/310 for quite a while, when undervolting was more profitable.

Where can I get the "non-standard" ADL ? (for linux)

Sorry, I may not have been clear. There is no "non-standard" ADL. The only reason why windows users can clock their memory lower is through program like MSI AB, which use custom and unofficial overclocking methods. IDK if these methods can even be duplicated in Linux, but even if they are, there are no programs out there that do it. You will just have to stick with memory at the medium speeds.

For example: My 7970 stock is 1100/1500. I used to run it at 1100:310, but I hated MSI AB, so now I'm running clocking it thru CGMiner, and it's at 1100/950. It's running fine, and there are no real side effects besides slightly higher power and temps, but nothing crazy. I still consider it worth it.

When I try to lower my memory on my 7970 XFX Ghost cgminer freezes my whole System and I have to reboot. Even a "even underclock (1000/1000) is not possible.. It fails immediately when I try it on startup with cgminer but works *sometimes* when I do it out of a running instance ... very odd.

Linux ubuntu 12.10 with latest beta driver and SDK 2.8 ..

Never had so much trouble than with these 7970 cards and I'm mining quite long :/ They're really not worth the hassle.. I'll probably stick to some 5870/5970 .. but they are starting to become really rare..

Strange, they run brilliantly on 12.04. Sounds like a driver/sdk problem though tbh, not sure what the best combo is for 12.10 as I've not used it much, sorry. I presume you've tried a few different combos?

Have an update. Figured I'd bump.

Reference OEM 7970, 13.3 beta, SDK that came with it. CGMiner 2.11.4, Diablo kernel, Worksize 256, Default vectors (1), intensity 11, 2 GPU Threads (default). Don't need to specify any other options aside from pool and GPU speeds. 1185 Core, 300 memory.

713.2 MHash/sec, or ~0.60186 MHash/MHz.

Running with 1 GPU thread was about 700 on the nose. Also, I have not experimented with all the combinations quite yet.

Edit: On another 7970, I was able to get slightly different core clocks, namely 1220/300, and I tested other kernel combinations and let them hash out for about 4-8 hours to get a good average that wouldn't fluctuate. Increasing vectors decreased hashrate significantly. Increasing threads beyond 2 either decreased hashrate significantly or caused a driver crash and recover. The default GPU threads (2) and default vectors (1) seem to be optimal.

730.1 MHash/sec (0.59844 MHash/MHz) with poclbm kernel and worksize=256
731.3 MHash/sec (0.59943 MHash/MHz) with poclbm kernel and worksize=128
728.1 MHash/sec (0.59680 MHash/MHz) with poclbm kernel and worksize=64 (This is the default setting.)
730.8 MHash/sec (0.59902 MHash/MHz) with diablo kernel and worksize=256
731.7 MHash/sec (0.59975 MHash/MHz) with diablo kernel and worksize=128
726.6 MHash/sec (0.59557 MHash/MHz) with diablo kernel and worksize=64

The hashrate per MHz seems to be slightly lower, probably because of a lower RAM:Core ratio. I will increase it slightly to see if I can eek out a slightly better MHash/MHz.

Can you post your card and cgminer command line please?

I gave you all the information you needed.

Pretty much.

i have a xfx 7970 black oced by factory i didnt want an oced model as i really dont like the idea can anyone help me get it et to original 7970 settings

I have XFX cards from the 6 series and the Double Ds are nice.  The 7 series XFX really skimped out on parts and quality control.  Everybody agrees they're thermal nightmares.

well that sucks ill keep an eye on temps but since i aim to underclock rather then over im hoping it will be ok, currently its running at near full load at 73 deg C

How fast are you running your fans to keep the temp that low? What is the ambient temp?

Hi guys, I am new to mining and just trying to catch up with all those technicalities so forgive me if I am talking nonsense :)

I put my AMD Radeon HD 7970 into just normal DELL Win 7 64 bit and I am using GUIMiner wtih -v -w 128 flags

My worry is that my card is running too high temperatures with fen working at about 100%. I underclocked it even but still the temps worry me. In Catalist I see

Activity: 98%
GPU clock: 895 MHz
mem clock: 1240 MHz
Power: 0%
Temp: 76 C
Fan Speed: 98 %

When I set to default (not using any tuning) my card hits t0 80+ C so I underclocked. But again, I don't know how to properly tune all those parameters, so any pointers would be awesome.

Thanks!

Ambient: 67-71°F

I don't use the stock cooling. Instead, I water cool most of my cards.  My 7970's have EK-FC7970 blocks and my 7950's have Thermaltake and Corsair AIO liquid cooled units modded to them.

For BTC, right? BTC mining does not use hardly any RAM, so feel free to underclock the RAM as far as it will let you, which is 150MHz below your core clock. This will save you a few deg.

Anything in the 80Cs is OK for mining for 1 year.  After 3 years at 80C it may be a problem.  Try undervolting it or clocking the memory down, that should help temps a lot.   I try to keep the fan under 65% if possible.

And I thought it was hot where I lived!!!  :o

great update, thanks for your info..

May I ask if you've done anything with your voltage? Or just left it be?

 :P

I left it alone, and getting about the same (5-10 variance) with just clocking the engine to 1200 and using diablo core and worksize 128, running at 75% fan at 74 degrees. (fan is variable from 50-95) Note this is a single card setup, if you run dual cards... you'll see almost 10 degrees higher on your top card depending on your cooling.

never messed with overclocking or under clocking much, never had the need

if i post my current info can someone help me improve on the hash rate while lowering temps?

win 7 64
gui miner
catalyst 13.1

gpu is xfx 7970 black double d.
current settings
core 925
memory 1325
vddc 1.175
temp 73deg c
hashrate 536mhash/s
fans speed 62%
load 98%
any help would be appreciated

Jered can't you lower the memory any further?

i tried lowering it to 1275 and lower and it crashes the pc
i dont know how to alter voltage or anything fancy help would be usefull
as would a target