I know that its good for at least 24 hours (I've been playing with clock speeds on the cards in the rig, stopping mining, starting again, etc), and I'm fairly certain it uses <300W, but I don't have any concrete measurements yet.

Hello everyone! I'm looking to sell my original iPad1 in light of my iPad2 purchase.



Photo Collection: http://imgur.com/a/DcGSd#kfZZH

It's a 64GB, WiFi + 3G model, and it includes the Dodocase I bought for it way back when, as well as another case, all the original contents of the iPad1 box + box, and the Apple wireless bluetooth keyboard + box. The iPad is in fantastic condition, and shows extremely minimal signs of wear -- you actually have to sit down and really look for signs of wear to find them. They're virtually unnoticeable on a day-to-day basis. I've always taken good care of the iPad, I'm not a smoker, I haven't spilled anything on it, I've always kept it clean, and the screen is in **perfect** condition. The Dodocase is in used condition, it shows some signs of use, but it feels very natural in the hand, very smooth.. a good kind of "worn", like holding an old book, which is what the Dodocase designers were going for in the first place. The keyboard is in perfect condition, just never had a chance to use it as much as I would have liked.

The iPad works perfectly, no screen cracks or issues of any kind, the bluetooth keyboard works perfectly, and price of shipping for everything is included in the price. I have no qualms with jailbreaking, but keep in mind that the iPad will arrive completely wiped of software and will be essentially factory fresh.

I'd like to try to sell here instead of eBay only because eBay = Paypal, and they charge ~$25 each for listing the auction/receiving payment, which I think is absurd. Having said that though, my price is going by the typical eBay selling prices for these (with all the accessories). Check me out on eBay:

http://myworld.ebay.com/starmenet

I'm a 100% seller on eBay, so feel free to send me a message to check that it's really me. Everyone I've ever dealt with on eBay has always come away happy.

Price: 122BTC

I think this is very fair considering all the accessories and the included shipping. For an additional 6BTC, I will ship priority internationally to anywhere in the world. Domestic or international, the package will be fully insured.

Thanks for reading! Let me know if you have any questions.

I think it's interesting that there is a thread for posting pictures of mining rigs, but no thread for posting (read: bragging) about highest core clocks managed on cards, and the configuration that went into it, etc. What works for one person with one card might help another person with the same card, etc. I'll start.



GFX Card: Sapphire 6970
Core: 1030MHz
Mem: 150MHz
VCore: 1225mV
Fan Speed: 100%
Consistent Mining Temp: 69.5C
Stable for at least: 24 hours

This card is an absolute champ, has always run cooler than the others no matter what slot I put it in. (I have one of these, http://www.drillspot.com/pimages/213/21333_300.jpg, directly blowing into the case.) Looking to up its VCore a bit further so I can increase the core clock a bit more and get the temperature in line with the others. My philosophy: push it as hard as possible until the temps are about the same for all cards, and stay below 80C if possible!

So what other pools would CherryPicking work best with? When I think of pools that CherryPicking should have, I look through

https://github.com/c00w/bitHopper/blob/master/pools.cfg

and see pools like Deepbit, Swepool (which is down right now?), RFCPool, BTCWorld, BTCGuild, BitMinersUnion, and others, and I'm not sure which ones I should make a config for, and which ones are most compatible, etc.

You can probably just barely fit 5 6970's comfortably with a 1500W PS if you flash the BIOS on all the cards so that the mem is at something low, like 150-300MHz, and don't overvolt the cards at all. Lowering the mem clock significantly reduces power consumption (and heat levels for GPU!) for me without hindering performance in the slightest, so I recommend it.

I mean, the 6970's with the modded BIOS run fine when they're running the modded BIOS in Ubuntu, its just the 6990 that borks the whole thing up when its running the modded BIOS as Ubuntu starts up. If I start up the system with the 6990 in backup BIOS mode and load Ubuntu, it works fine. So its a BIOS issue specific to the 6990 in some way.

Not sure about what driver version, will check when I boot back into Ubuntu. I literally just installed Ubuntu, then followed this guide: https://bitcointalk.org/index.php?topic=7514.msg110334#msg110334 with the 2.4 APP SDK.


I edited both: dumped the Master/Slave with GPU-Z, modified the clocks in the Master bios, modified the clocks in the Slave bios, then flashed each to the Master/Slave BIOS of the 6990. I'm definitely doing this right. Its just that Ubuntu really doesn't want me to boot with this modded BIOS, which is so strange. :/

EDIT:

[SOLVED] AND JUST LIKE THAT, I FIGURED IT OUT. OK, here's the deal: when I was modding the BIOS for my 6970's, I changed voltages and memory clocks for all 'modes' of the 6970 (boot, performance, etc), so no matter what, the same voltage and memory underclock would run all the time. Apparently you can't do that with the 6990 Master and Slave BIOS: you have to just edit the memory speed in the column with the 880core, and just edit the 1175mV voltage (to something else) in the GPU register -- leave everything else alone! I hope this helps anyone else out there that has been having trouble with this, as no one else on the internet apparently has had this problem. The 6990 BIOS is apparently more sensitive to changes than the 6970.

If you spent a long time searching through Google for a solution and my troubles helped you, consider tossing some BTC's my way.. 1HayA42ajEr19iEaeJbLLkPyKYMve2U4T2

Yeah, runs just fine, perfectly stable. And I mean it will obviously work fine since the 2D mode for all AMD cards is like 250core 150mem, so 300mem should be just fine. I just don't understand how voltmodding the 6990 through RBE is OK with the drivers (from what I've read.. I haven't tried yet), and yet underclocking the mem to 300 causes the Ubuntu ATI drivers to freeze up and refuse to boot. It's just total crap. :/

In Linux, though? So the drivers are fine with me BIOS flashing my 6970's as I please, but there's some special case for 6990's? wtf.

I thought this only affected Windows users? Right now I'm running with 3 6970's and 1 6990 in the case, and I've already BIOS flashed the 6970's to run @ 300MHz memory speeds, and there's no problems with them.. only the 6990 is causing a problem with booting into Ubuntu.

Seems to be a problem with either the pool or the miner or CherryPicking.. the other night Miner0 was running just fine, and the other 4 miners were running @ 0MH/s with lots of connection errors. A little while later, the pools were updated, and all the miners were back up and working again at full blast, submitting shares to the various pools.

I also monitored the temperatures while this was happening.. during the time that all but Miner0 were idling, they were running at a low temperature, and when the pools were updated, they increased in temperature again and returned to mining. This suggests to me that the clocks and GPU loads weren't the problem.

If you spent a long time searching through Google for a solution and my troubles helped you, consider tossing some BTC's my way.. 1HayA42ajEr19iEaeJbLLkPyKYMve2U4T2

So yesterday I decided it'd be a good idea to reduce the amount of electricity I pull from the wall when mining by flashing the BIOS of my 6990 (master and slave BIOS) such that the memory clocks are always at 300MHz. I flashed through Windows with the ATI BIOS flash utility (winflash? atiwinflash?) and the utility reported that the flashing was successful. Upon rebooting into Linux, I ended up at a blank screen and the OS was unresponsive.

Keep in mind that NOTHING had changed in the mean time with Ubuntu -- it was working fine, I switched to Windows and flashed the BIOS, rebooted to Ubuntu, frozen at black screen. So after backing up all my files and such, I completely re-installed Ubuntu, re-installed all the necessary files for bitcoin mining, and updated the rig, and then rebooted. BLANK SCREEN. So just now, I toggled the BIOS switch back to the backup BIOS, and voila I'm back into Ubuntu just fine.

Anyone else have this issue with BIOS flashing? Has anyone managed to flash the BIOS of a 6990 and have it work just fine? Is there something special I need to do to flash properly? Literally all I did with RBE was adjust the memory clocks to be 300MHz across the board on the master and slave BIOS, and I ran into problems.

Halp plox.

EDIT: My problems are similar to https://bitcointalk.org/index.php?topic=8447.0, but I have my master/slave BIOS backed up. My problem has to do with Ubuntu not wanting to boot with my modified BIOS on the 6990.
EDIT2: Took me a while, but I actually found someone that has been messing around with BIOS flashing the 6990.. http://www.overclock.net/13034600-post601.html.. he only covers volt modding through RBE and doesn't mention underclocking the mem, and he mentions to only adjust voltage on the VID4 GPU register entry.. Hm..
EDIT3: Just reflashed to a slightly different modified master/slave BIOS (underclocked mem, voltage bumped to 1200mV instead of 1175mV) and same problem, Fgsfds. Has anyone managed to BIOS flash their 6990 properly?

Still open to suggestions/thoughts/advice!

k, and as such I will remove my configs. It's a shame they're not hopable. :/

Also, bloodred, every now and then CherryPicking will just spend a long with just one GPU doing mining while the others idle @ 0 (making me think they've crashed) while the console log spits out "Failed to connect, retrying..." messages. Is it possible you could implement some feature that when a minute or so goes by and there's problems connecting, the miner switches to a backup pool (which is very reliable) and mines with that pool, checking back on the original pool every few minutes or so? During this time that no mining is taking place, no money is being made, and my 2150MH/s machine is being reduced to a 400MH/s drop-in-the-bucket.

Made a config for BTCGuild since bloodred is off twiddling his thumbs somewhere..

CONFIG FILES REMOVED BECAUSE THESE TWO POOLS DELAY STATS, PLEASE DON'T USE THEM.

Edit: Also, I've set ArsBitcoin as type BACKUP in the config, which I thought would mean it would ONLY hop to Ars if nothing else was available, or the other stuff was REALLY bad, but I seem to be hopping to Ars on a regular basis. Is this normal?

Would be nice if someone could piece together a config for btcmp~

So what are some of the better pools for hopping to use? I'm hopping between 18 pools right now, and I'm looking for more (PROP) pools to get with -- or whatever pool seems to work best and dole out the most BTC. Looking at my SSH console right now, it looks like Eligius is feeding off of the 2100MH/s brute strength of my rig, and I'm wondering if my time would be better spent elsewhere (Ozco.in, Mtred).. I started making a DeepBit config file this afternoon but I dropped it half-way through because I wasn't sure if reading the *average* shares from the stats page was the proper value to input for the shares computation in CherryPicking.

Recommendations? Advice?

Hi. Then please explain how the two cards sandwiched between the top card and the bottom 6990 are cooler then the top card.

I've been over this before, and you can see in the pictures I posted of the rig, they're not just a solid brick of video cards.



I already told you many posts back that I have some erasers that I cut down to size and placed between the cards to provide space for fan airflow. And apparently yes I can wave air across the outside of the GPU body and expect it to stay cool because thats what I'm doing. Its ~15-20C cooler with the big fan in place. I've intentionally put space between the cards. You can see the spacing in the pictures. That blue thing there is an eraser in between the cards, forcing some clearance.

Even with the spacing in-between all the cards and all the airflow going on with the GPUs, which are running at 100% fan speed, the top card is still running much warmer than the others. It runs hot at stock temps, stock voltages, and stock BIOS, no matter what, and that was my point.

Its a shame not too many cases out there are built for riser cards (making riser cards useless for most people), otherwise I'd put a slot of space in-between each card and go to town. It also doesn't help that the stock fans on this Lian-Li case barely move any air at all.

For anyone curious about the reality of differences between identical graphics cards, here's an example to take to heart: my top 6970, which has the most GPU core exposure to moving air (on the non-fan side), runs hotter than the cards sandwiched in-between it. It's running at stock frequencies, with the stock BIOS, and it hits 82-83C after a while even with the gigantic fan blowing on it, and its fan running @ 100%. No matter what position I put it in inside the rig, it always seems to run too hot. Before I had the big fan in place, it'd easily hit 97C after a few minutes. I'd RMA it and take a chance at getting a card that would run cooler and clock higher if I could have it by tomorrow. The card below it on the other hand, the best 6970 I have, hits 1000MHz with full stability @ stock voltage and stock BIOS settings, only hitting 77C. Card below it is somewhere in the middle of these two cards in terms of max stable clock, but temperature wise it runs cool.

Bit of a small update as to where I am right now:

The BIG (like, XBOX HUEG) Lian-Li case arrived. I transferred over all the components, got everything set up, and closed up the case. After testing out things at stock frequencies, here's what I figured out: the sheer massive size of the case solved two of my problems -- the top-mounted PSU now has plenty of airflow and no antagonistic airflow currents to fight against, so it outputs exactly what its supposed to and doesn't overheat; the 6990, in the absence of the low-clearance with the PSU, now has plenty of airflow and stays at lower temperatures, even running at higher frequencies -- and unfortunately, introduced a new problem.. the 6970's are getting much hotter than they were in the smaller case. So the new case solved two problems and caused a new one. Well, s***.

Then out of desperation, I took off the side of the case and mounted up a cheap window-mount fan that I have (http://www.drillspot.com/pimages/213/21333_300.jpg), set it to max speed, and tried mining again. LOW AND BEHOLD, the temperatures are consistently, over the course of 30-45 minutes of mining, almost 20C cooler. It is spectacular how much cooler the temperatures were.

So since then, I've upped the core clocks of all the GPU's quite a bit, up to ~920-980MHz, and temperatures are hovering around the mid-70's low-80's. Power usage isn't too bad either (for whats in this rig), floating around 1350W according to the Kill-A-Watt. Current combined mining speed: ~2100MH/s, and by looking at the temperatures it looks like I might be able to hit just a little higher.

So? I thought PROP > PPS anyway.

Sure. The way I see it, the sooner that everyone who is a part of bitcoin realizes that all that panic and FUD does is 1.) lower the exchange rate of the bitcoin and 2.) lead to topics like BITCOIN IS CRASHING SEND ME ALL YOUR BITCOINS WHILE YOU CAN!!, the sooner everyone will get back to investing in bitcoins (read: buying 2-3 bitcoins every now and then) and the sooner the exchange rate will go back up to what it used to be. Bitcoin is a currency, and the value of currency is directly tied to people's confidence in it. More confidence, more profit to be had.

Also, a quick update: have been running the top 3 6970's for 24 hours now doing some pooled bitcoin mining, temperatures are stable in the low-80's. Sounds good to me! Can't wait for this case to arrive so I can get some proper cooling and I can finally get this horse running at full gallop!

Oh, I see. Well, I'll remove them from the pools to consider for hopping, which moves the number of pools I'm set up with from 18 to 14.. I guess its time to register with more pools.


Ah, I see! That clears things up. Actually about 15 minutes after I posted, I noticed the difference @ the btcserv page. Silly me.

Any chance we can get more config's generated for all the worth-while pools out there in the Pools forum (https://bitcointalk.org/index.php?board=41.0?)