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Bitcoin Discussion Thread Part 2

You guys are still buying in?
I'm getting out now, I have 1 5830 that's on eBay now and I'm hoping to get a little profit out of it.
I made about $150 total and I have 2 BTC sitting until it gets to a price point I find acceptable.
 
No point in buying BTC at this price. If it drops down to $10-12/BTC, then I would buy. Just mining now, waiting to see what happens with the next dif increase.

Really, just waiting for the Namecoin diff to decrease in the next few weeks, which I think will bring more BTC Miners over and potentially raising the price of NMC so I can sell my hoard of coins.
 
Yea I plan to buy in, maybe 3 5830's

I mean, thats the price of a new Wii U thingy give or take, and I just got a free laptop to sell

Anyways, If it just makes a few coins thats enough for me, plus I could use some ATI cards, its been a while and sooner or later theyll fold lol
 
I'm reading that with the 11.6 drivers, it's now possible to mine with up to 8 GPUs on a single board in Windows and possibly even more in Linux. Veeeery eeeenteresting.

Now I've just got to get my hands on a pile of 6990s for a reasonable price. Ha!
 
image2iq.jpg

This is of course a joke
 
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dang i wont have a chance to update before going away for the weekend. QQ

Thanks for the update.
 
Lorien said:
New version of Guiminer released: https://github.com/downloads/Kiv/poclbm/guiminer-20110701.exe
http://forum.bitcoin.org/index.php?topic=3878.msg311551#msg311551

This has the latest versions of all miners [strike=1]plus kernel hacks rolled into it[/s]. It also includes fallback support when #n pool connection attempts fail.

Edit: You will still need to do the kernel hacks if using Phoenix w/ poclbm.
Click to expand...

I'm getting identical performance to the late June version. This is running Phoenix with phatk or poclbm on my 6950 and 6970 on 11.5b drivers.

Identical performance on my 5830s as well on 10.11 drivers.
 
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If anyone has time please try different AGGRESSION levels and set FASTLOOP to false.
I want to confirm these crazy increases I'm seeing. In previous versions neither of those settings made much of a difference so I pegged AGGRESSION to the max before it made the system too laggy (11 in my case).

Now I started a new set of tests with various levels of aggression. Levels 1-6 did nothing, and in fact decreased hash rate. When I got to 7 I saw this with nothing running but the miner:
The readout was erratic, it jumped from 460 min to 535 but stays around ~487. I have repeated this now several times across several reboots. I also tested different levels of Powertune, and 8% seems to be the most effective (for this card at least).
image6bj.jpg



If I opened a browser window with about a dozen tabs I got this:
image1le.jpg


This is with a browser open with just one tab, taken just now:
image2yn.jpg
 
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What card is that, Lorien? A 5870?

edit: Durr, just noticed...Cayman. So 6970?

Changing aggression didn't do anything on my 6950 or 6970.

However, on my 5830s, I went from a stable 310 at aggression 11 to bouncing between 314 and 335 at aggression 6! There definitely seems to be something to this. I'll let them run for a while and see what effective rate I get.

edit: Running two instances (US East and US Central on BTC Guild), I'm getting a pretty stable 160.8 on each instance, so over 320 per card!


What are the details of your setup? Driver version, APP version, card clocks, etc? I'll try to recreate what you've got there and see if I can get the same results.
 
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Cool so I'm not rambling lol. And yes, it's a 6970 @950Mhz core with Powertune at 8%
I've found another culprit to MH/s decrease, RealTemp. With it running it pegs my hash rate to 419 flat. I don't use any other CPU/GPU temp monitoring app but I bet they will have the same effect.
 
Parja said:
What card is that, Lorien? A 5870?

edit: Durr, just noticed...Cayman. So 6970?

Changing aggression didn't do anything on my 6950 or 6970.

However, on my 5830s, I went from a stable 310 at aggression 11 to bouncing between 314 and 335 at aggression 6! There definitely seems to be something to this. I'll let them run for a while and see what effective rate I get.

edit: Running two instances (US East and US Central on BTC Guild), I'm getting a pretty stable 160.8 on each instance, so over 320 per card!


What are the details of your setup? Driver version, APP version, card clocks, etc? I'll try to recreate what you've got there and see if I can get the same results.
Click to expand...

what clock speed is your card?
 
Here's another kernel hack/fix. There is a syntax error in the phatk kernel.cl file
Find this line: #define r1(x) ((rot(x],15)^rot(x,13)^((x)>>10U))) and change it to this: #define r1(x) ((rot(x,15)^rot(x,13)^((x)>>10U))). All you're doing is deleting that orphan bracket between the x and ,15.

Should give you a 2-3% boost.
 
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Lorien said:
Cool so I'm not rambling lol. And yes, it's a 6970 @950Mhz core with Powertune at 8%
I've found another culprit to MH/s decrease, RealTemp. With it running it pegs my hash rate to 419 flat. I don't use any other CPU/GPU temp monitoring app but I bet they will have the same effect.
Click to expand...

I use a program called Process Lasso to isolate my miners on one core of my CPU. You could also set any other process can use anything but that core. Give that a try and you might be able to eliminate the issue of losing performance when something hits your CPU. I'm sure the issue is, with the aggression set that low, it's losing priority to other programs.

Does running a lower Powertune actually help? My understanding of Powertune is that it just adjusts the maximum power that your card can draw. I don't see how a lower setting could help. Maybe you've got some thermal throttling going on at higher power levels.
 
Lorien said:
Here's another kernel hack/fix. There is a syntax error in the phatk kernel.cl file
Find this line: #define r1(x) ((rot(x],15)^rot(x,13)^((x)>>10U))) and change it to this: #define r1(x) ((rot(x,15)^rot(x,13)^((x)>>10U))). All you're doing is deleting that orphan bracket between the x and ,15.

Should give you a 2-3% boost.
Click to expand...

No change for me on that one.
 
Parja said:
What are the details of your setup?
Click to expand...

Driver version: 11.6 WHQL
APP version: Don't remember how to look it up but it the one that came with the driver. I tested all of them from 2.1 to this latest one. No difference except with 2.1 which was slower.
Card clocks: 950 Core, 1375 Memory. I should tweak the memory clocks down a bit but I don't want to waste any major hashing time doing that lol. I'm just overclocking via CCC.

P.S: Another thing I noticed is the updated software no longer ties any of the CPU cores like it did before.
 
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Lorien how did you get those mhashes? I can only get max 420 on my 5870. I'm using your same flags and have changed my aggression and still on 420 mhashes.
 
Did you update to the latest Guiminer which was released today? And did you reapply all the kernel.cl tweaks I posted earlier?
 
Lorien said:
Did you update to the latest Guiminer which was released today? And did you reapply all the kernel.cl tweaks I posted earlier?
Click to expand...

Can you edit your post with the tweaks again? Your post is the first post on this page. They're slightly scattered.

O and should I delete my old guiminer folder and start fresh or can I just extract over the existing folder?
 
EdGaRRRRR said:
Can you edit your post with the tweaks again? Your post is the first post on this page. They're slightly scattered.

O and should I delete my old guiminer folder and start fresh or can I just extract over the existing folder?
Click to expand...

This^^

Thanks!
 
applied the tweaks and still getting 420 mhash like I was before updating guiminer.
 
These are all outdated. I have updated them in the following post: http://hardforum.com/showpost.php?p=1037542892&postcount=832

Consolidated list of updates and tweaks:
[strike=1]Guiminer 20110701 released: https://github.com/downloads/Kiv/poclbm/guiminer-20110701.exe
http://forum.bitcoin.org/index.php?topic=3878.msg311551#msg311551

This has the latest versions of all miners. It also includes fallback support when #n pool connection attempts fail.
Click to expand...
[/s]
[strike=1]POCLBM and Phatk kernel optimization by bitless: http://forum.bitcoin.org/index.php?topic=22965.0

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) )
- Quit and restart the miner once the change is done.
- Make sure you use BFI_INT in your extra flags.
Click to expand...
[/s]
[strike=1]POCLBM kernel optimization by goxed: http://forum.bitcoin.org/index.php?topic=23309.0
- Edit BitcoinMiner.cl if using vanilla guiminer without -k flag
- Edit kernel.cl if using -k poclbm flag.

Find the line: u W0, W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11, W12, W13, W14, W15; and replace it with __local u W0, W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11, W12, W13, W14, W15;
- Quit and restart your miner after the change is done.
- This does not work when using the phatk kernel.
Click to expand...
[/s]
[strike=1]Phatk kernel syntax error correction.
Find this line: #define r1(x) ((rot(x],15)^rot(x,13)^((x)>>10U))) and change it to this: #define r1(x) ((rot(x,15)^rot(x,13)^((x)>>10U))). All you're doing is deleting that orphan bracket between the x and ,15.
Click to expand...
[/s]
 
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Anyone else getting a "problem communicating with bitcoin RPC" error using poclbm and BTCGuild? I have been down completely for over 24 hours now, and both clients are showing this error. They worked before, and I haven't changed anything. The bitcoin app is running in server mode. Did something recently change with the app itself?
 
There's been a few issues with the pool lately. Eleuthria installed some patches among other things which seemed to be running fine but caused connection issues and eventually crashed. I switched to Slush's pool for the night because of that.
 
Just a quick question:Should i continue the mining since the difficulty would likely go up even more?My rig is only capable of 95 Mhash/s now,i'm planning on getting a 6870 and 5770 (end up in roughly 500 Mhash/s).But many guys told me that i need at least 1 Ghash/s to gain more than lose.So what should i do?
 
The next difficulty change is not going to be that great. Under the current difficulty you are making about a dollar every 24 hours with 95MH/s. Next difficulty you'll be making ~90 cents. 500MH/s will certainly bring you up considerably to about ~$4.50+ per day. This is all assuming the value of the coins stays static.
All I can tell you is plug in your numbers including electricity costs + hardware expenses here, to see what timeframe is required for you to truly recoup those costs: http://98.200.247.249:81/btc_calc.php
 
Thanks Lorien.I've only received .42 BTC since June 17 so i'm going to get the new video card then.

My only fear is that the BTC will collapse right after i buy these new video cards and i'll be in big trouble lol.
 
Would any of you guys be interested in joining a minipool on triplemining.com?

https://www.triplemining.com/
http://forum.bitcoin.org/index.php?topic=23663.0

It's a small pool now, but they offer some interesting incentives for creating a minipool, a sort of sub-pool within the pool.

They've also got a block party going on right now for finding their first block, so even more incentives to be made.

http://forum.bitcoin.org/index.php?topic=25412.0

I figure with the hashing power we've got, we should be able to take one of the top 5 spots.

I created a [H]ardPool minipool. I'm switching my miners over to it, at least until the end of the block party. Come on, 50 GH/s! Post here, PM me, or just join the minipool if you want in.

Link to join the minipool is: https://Parja1.triplemining.com/register
 
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Parja said:
Would any of you guys be interested in joining a minipool on triplemining.com?

https://www.triplemining.com/
http://forum.bitcoin.org/index.php?topic=23663.0

It's a small pool now, but they offer some interesting incentives for creating a minipool, a sort of sub-pool within the pool.

They've also got a block party going on right now for finding their first block, so even more incentives to be made.

http://forum.bitcoin.org/index.php?topic=25412.0

I figure with the hashing power we've got, we should be able to take one of the top 5 spots.

I created a [H]ardPool minipool. I'm switching my miners over to it, at least until the end of the block party. Come on, 50 GH/s! Post here, PM me, or just join the minipool if you want in.

Link to join the minipool is: https://Parja.triplemining.com/register
Click to expand...

Using that last link you would gain all the benefit from us joining your pool and all we would get is slow block generating.
 
traderj said:
Using that last link you would gain all the benefit from us joining your pool and all we would get is slow block generating.
Click to expand...

Hmm, yeah, looks like the1% is only paid out to the minipool owners. I read it wrong and thought it was split among the minipool that found the block. That would be a lot cooler.

I guess if we don't have a ton of members, it would be easy enough to just send everyone their portion of that 1% as a percentage of their relative hashing power.

And anyway, it's only .5 BTC split among all of the minipool owners when a block is found, so it's not really going to be all that much. I'm more interested in all of the bonuses they're giving out for the next week.
 
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Parja said:
Hmm, yeah, looks like the1% is only paid out to the minipool owners. I read it wrong and thought it was split among the minipool that found the block. That would be a lot cooler.

I guess if we don't have a ton of members, it would be easy enough to just send everyone their portion of that 1% as a percentage of their relative hashing power.

And anyway, it's only .5 BTC split among all of the minipool owners when a block is found, so it's not really going to be all that much. I'm more interested in all of the bonuses they're giving out for the next week.
Click to expand...
if it makes sense for me to move my 6870 from Slush to somewhere else I'd do it.

I'm just casually mining on it in hope to recoup some of the cost of the GPU.
 
rocketr2 said:
Hmm, theres around 50 gtx580s, thats gives you around 7ghash.
9 ati 6990s would give you more. Also 50 gtx580s would cost you around $20,000. and the 9 radeons would be $7200
Click to expand...

yeah, that pic was already debunked as a joke, the earlier pic with the 100+ 5770s would've cost $10,000 and given 3x the production of those 50 gtx580s...
 
jebo_4jc said:
if it makes sense for me to move my 6870 from Slush to somewhere else I'd do it.

I'm just casually mining on it in hope to recoup some of the cost of the GPU.
Click to expand...

Well, decide for yourself, but there's a lot of good bonuses to be had from now until the 8th. Any bonuses I would get as the pool leader, I'll split among everyone as a proportion of the hashing power you contribute to the minipool.
 
Well, using the latest GUIminer (with all the listed tweaks) and the latest AMD Catalyst 11.7 preview with APP 2.5, I'm now getting 890Mhash/s out of my 6970s at 1GHz.

:D
 
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