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Bitcoin Discussion Thread Part 2

Try -k poclbm, bump up the aggression to 8 maybe, use WORKSIZE=256 and get rid of FASTLOOP cause that's only useful when you have multiple GPUs.

P.S: The hack also works for the vanilla guiminer, just edit the BitcoinMiner.cl file.
 
Try -k poclbm, bump up the aggression to 8 maybe, use WORKSIZE=256 and get rid of FASTLOOP cause that's only useful when you have multiple GPUs.

P.S: The hack also works for the vanilla guiminer, just edit the BitcoinMiner.cl file.

didn't help :(
 
I have a single 5830 in a dedicated winxp machine, stock guiminer it was 230-240mhash. With the kernel tweak and switching to the phoenix its now 241-256mhash. I'm running Agression 6, with 7 the swing only went to 250. Temps top out at 50c, course it lives in the basement and has the fan cranked to 100%

-k phatk VECTORS AGGRESSION=6 FASTLOOP=false BFI_INT WORKSIZE=128 < this is the line I'm using
 
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Try the same settings except with -k phatk?
Browsing through this thread people report a low of variance between cards of the same model even while using identical settings. http://forum.bitcoin.org/index.php?topic=4710.0;all

been trying different things, this is my best so far

m4lyN.png
 
That's more like it. You are right in line with what other users have reported at the same clocks. To go higher requires overclocking and/or voltage tweaking.
 
@Lorien - I'm using guiminer, how do I set up Phoenix with my btcguild.com userID/password?
Thanks.
 
I'm going to assume you've already created an account on the site and are logged in.

Click here:
image2vp.jpg


On the page that comes up:
- Enter a name for the worker. It can be anything you want. Notice the format of the worker name. Your acount name is already filled out in the format accountname_
- Choose a password. It can be anything you want. For security reasons it's a good idea to make it different than the password you use to login to the pool website.
- Confirm password.
- Click on Create worker.

Click on "How to connect" and choose a server that is close to you from the list:

image2cq.jpg

It doesn't really have to be a server close to you. I change servers often, depending on how loaded they are.

- Open Guiminer.
- Click on File---New Miner---New Phoenix miner.
- Name it whatever you want.
- Click the Server dropdown box and choose "other"
- Enter the address for the server you chose in the previous step.
- Enter the name of the worker (remember it will be accountname_XXXXXX where XXXXXX is whatever you chose to name it).
- Enter the password
- Fill out the extra flags as discussed in the previous posts.
- Click the start mining button.
 
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Yes, make sure you add the hack I posted earlier and tweak the extra flags settings. You will have to experiment with those. What hardware do you have?
 
Holy crap, here's a free 2-3% boost in hashing speed for anyone using Phoenix with either the phatk or poclbm kernels.

Find and edit the kernel.cl file with any text editor and replace this line: #define Ma(x, y, z) amd_bytealign((y), (x | z), (z & x)) with this line: #define Ma(x, y, z) amd_bytealign( (z^x), (y), (x) )
Stop and restart the miner once the change is done and make sure you use BFI_INT in your extra flags.
Source: http://forum.bitcoin.org/index.php?topic=22965.0 by bitless from bitcoin forums.

I went from ~411MH/s to this:

image1dpi.jpg


Enjoy!

Thanks, went from 382-385mhash to 396-397mhash on my main rig.
 
been trying different things, this is my best so far

You should change your worksize to 256 and set cpu affinity to only one core/thread. It'll reduce your cpu load if you have multiple gpus.

BTW: Thanks for the tips Lorien. I got an extra 11 mhash/s on my 5850 and 6 mhash/s on my 5770.
 
Wow nice, with the tweak I'm getting up to 415 mhash/sec on a modestly OC'd 6970 (+20 mhz so 900mhz core clock). HD5830 is up to 309 mhash!

Yup, seeing similar here. ~397 with my unlocked 6950 OCed to 880 and ~312 on each of my 5830s OCed to 975. Nice!
 
Thanks for the kernel tweak, it seems to be working here. On aggression 11 im getinnging ~340 mhash/sec and on agrression 7 a bit lower than that. I'm only using 840 core right now, I dropped the clocks down from 900 and was reading up on the unlocking stuff ;) Also thanks for the tip on using diff. btc guild servers-- I've been meaning to try that. Keep in mind that the worker password you set... guiminer does not seem to like question marks in the password. Any idea what the default btcguild selection from the dropdown box uses as far as the server it connects to?
 
Any idea what the default btcguild selection from the dropdown box uses as far as the server it connects to?

the default btcguild selection links to the old btcguild server. open up server.ini in your guiminer folder and manually add the new servers
 
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BTCguild gained like another 2000 workers this weekend. I hope it's from people switching pools and not the network still growing this fast. Pretty soon my 3200mhash is going to be getting me 1 coin a day lol
 
Thanks, I added the servers.

I'm trying to downclock the memory in afterburner as per the suggestions here; however, while it will let me lower the slider and hit apply... it doesn't seem to actually be lowering the memory clocks below the default 1250.
 
BTCguild gained like another 2000 workers this weekend. I hope it's from people switching pools and not the network still growing this fast. Pretty soon my 3200mhash is going to be getting me 1 coin a day lol

with all the DDoS'ing lately, i would bet on pool hoppers
 
Thanks, I added the servers.

I'm trying to downclock the memory in afterburner as per the suggestions here; however, while it will let me lower the slider and hit apply... it doesn't seem to actually be lowering the memory clocks below the default 1250.

did you edit the MSIafterburner.cfg file...?
 
with all the DDoS'ing lately, i would bet on pool hoppers

I believe there is a site that charts the growth.. I will see if I can find it. It would be nice to get SOME idea of what we have in store for the next difficulty increase.
 
did you edit the MSIafterburner.cfg file...?

Ive added the changes (that sentence and enabling unofficial overclocking) that's allowed me to overclock core, memory, and voltage. Is there something specific to allow me to underclock the memory below stock?
 
Hey, just found out about bitcoin today and spent all day reading about it lol, but I've got some questions.

First and foremost can I even do it? I'm in Iraq right now and the internet we buy is slow as dog shit, and I tried doing this test here
http://www.alloscomp.com/bitcoin/portStatus.php
and it failed. does that mean that I can't even do bitcoin? I was hoping to get into this quick and get a small foothold in the door just for fun but I'm not sure I can even do it now. I'm just worried by the time I get back to the states that a farm wouldnt be worth a shit.

Am I screwed? Do you have to be online the whole time to do these or can I run in spurts? Most the how to's and FAQ's I've found don't cover much for network requirements

thanks!

I wish I found this stuff earlier when I was still stateside and I had my 19 GPU farm, so would have mined my ass off lol
 
Would difficulty decrease if the computational speed ever decreased.. or will it always remain at least as high as it ever was?

Interestingly, GPU-Z shows that the memory is clocked lower but the monitoring of MSI Afterburner shows no change..
 
Would difficulty decrease if the computational speed ever decreased.. or will it always remain at least as high as it ever was?

Interestingly, GPU-Z shows that the memory is clocked lower but the monitoring of MSI Afterburner shows no change..

if the network speed were to decrease difficulty would also decrease.
 
Hey, just found out about bitcoin today and spent all day reading about it lol, but I've got some questions.

First and foremost can I even do it? I'm in Iraq right now and the internet we buy is slow as dog shit, and I tried doing this test here
http://www.alloscomp.com/bitcoin/portStatus.php
and it failed. does that mean that I can't even do bitcoin? I was hoping to get into this quick and get a small foothold in the door just for fun but I'm not sure I can even do it now. I'm just worried by the time I get back to the states that a farm wouldnt be worth a shit.

Am I screwed? Do you have to be online the whole time to do these or can I run in spurts? Most the how to's and FAQ's I've found don't cover much for network requirements

thanks!

I wish I found this stuff earlier when I was still stateside and I had my 19 GPU farm, so would have mined my ass off lol

I'm not sure to be honest with you. The port shows as closed for me too but my bit coin mining is working just fine. You could try running it on any machine just to make sure there are no network problems.

Your wallet doesn't need to be able to connect to the web at all times but your miners will have to.

On a side note if you already have a gpu farm I assume it was for folding and nvidia based? Nvidia cards aren't very good at mining.
 
Using that site shows my port is closed as well; however, my miner has been getting work through w/out issues.

Thanks, I wasn't sure if it was a matter of always increasing difficulty or if it scaled both down and up.
 
get rid of FASTLOOP cause that's only useful when you have multiple GPUs.

Oddly, if I remove FASTLOOP from the "extra flags", my MH/s drops from ~430 to 390, using a single 5870.

At 430 MH/s about 1% of my shares are stale/invalid over the last 12 hours.
 
It was Nvidia yea, but I've since moved to MultiCPU systems for folding to keep up with the times, but I still had the farm back when they added GPU's it seems, and even tho they were Nvidia I had 4x 9800GX2's, 3x 8800's, and 3x 295's, with the rest being GTX 260's. Would still have been a good farm, paired with a Q66 and a few E83's I could have mined pretty hard for a few weeks then got back to folding once the SR2 came out and I sold everything for that (or my octo-socket nightmare lol)
 
Also, anyone know what kind of network usage takes place during mining? What am I looking at bandwidth wise? Ping play any role? (god I wish atleast one FAQ or guide covered the network side, everyone just assumes that you got full time cable internet these days) What happens if all of a sudden we lose internet? Dust storms or enemy attacks knock us offline quite often, and even on good days we have an 8 hour time limit we can be online. What if I'm mining for 8 hours then all of a sudden my connection drops?

Sorry for the barage of questions, I've just been really liking what I'm seeing with this bitcoin stuff, seems kinda fun. Not exactly a good cause like folding, but hey, if I run a GPU or two 24/7 and mine who know, maybe the coin will be worth something and I can make a few bucks off it lol (plus it gives me other nummbers to stare at so I'm not staring at my SR2's TPF all day lol)

and what pool do yall recomend? I wouldnt mind being in the same pool as some [H] guys, make it more like a team effort lol
 
I'm liking Slush's pool... have not had to deal with ddos since switching from bitcoinpool, which was pretty much unconnectable for days at a time
 
and what pool do yall recomend? I wouldnt mind being in the same pool as some [H] guys, make it more like a team effort lol
You're obviously used to folding.

This is bitcoin. We are here for personal gains only. ;)
 
Yea, a few grand in the hole for folding I'm kinda stuck on a one track mind. Wouldnt mind playing around with this coin stuff tho, seems fun lol

any word on what happens if my laptop suddenly loses the internet? Do I get credit for what I've already done?
 
I'm just worried by the time I get back to the states that a farm wouldnt be worth a shit.

The truth of the matter is, even now starting a farm is risky at BEST. Unless you already own the hardware or able to pick up a cheap video that you can throw into existing hardware I would be pretty hesitant to start a new mining only rig.

Basically, anyone who started a new mining rig this month from as early as June 1st has a pretty high chance of not recouping the cost of the rig back if that was their only goal. If you only bought good priced videos or have the supporting hardware already, you're in a much better position.

Things can/will change but right now, I wouldn't recommend anyone starting a new rig for the sole purpose of mining imo.

Bandwidth is small in terms of mining. The block chain that the client first downloads is pretty hefty tho. That's not required if you're just mining. If you're not connected, your mining is basically dead (if in a pool). I guess solo, you can do it offline but even if you do find the 'winner' it won't be confirmed til you get back online. And it's basically first announce = winner. So if someone else finds it while you off even if you were first, too bad for you. Realistically the chances of finding a block solo is so far below the scale with the current difficulty tho I wouldn't even bother. Just fyi: current difficulty = 0.0000000000000001688140899042556847264862085467029828578 or a single hash solving a block.

Nvidia just sucks compared to ati for mining. Your 19 nvidia cards, I would be surprised if it can even push 1GHash/sec (sub 900M imo) on them combined. A low ati estimate would be pushing 4GHash/sec conservatively and upwards 6GHash/sec for a good OC on equivalent hardware.
 
I finally installed my two 6990s which I found after much heartache and hassle, and It looks like its a no go in my case... If you guys are looking for some mining hardware (5830,5870,6990)I started a FS thread...

sad day :(
 
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