Topic: [ANN][TAG] TAGMining.Com is now the official pool of Tagcoin! - page 10. (Read 45653 times)

Well the house deal fell through on a bad inspection.

FML.

I'm going to be drinking tonight if anyone is trying to get a hold of me 

-Fuse

The pool? Yeah..

Hey, is this still working?

Might sell or trade my 5 ASUS 270X CU/TOP cards, I'll be figuring that out tonight.

Nothing wrong with them, I just don't like how hard it's been to get them to hash the way I want, and it fluctuates a smidge more than I like (+/- 10kh).

They and the MSI's are the quietest of the bunch, they're great cards.

If I do decide to sell or trade, I will let this thread know first. For trade, I want MSI 270/270X cards, new or used/like-new. If you can't find any, this thread has them, and I would accept a shipment from him as well.

I'll keep you guys updated.

24kilo, this doesn't affect what I'm doing for you, I'm still going to tune yours! Like I said before, I'll do the work on my units, then make sure your units have good settings based on mine.

I think some of my rigs have it set to like 60 and some don't specify it at all, but all the rigs have the fans set to 100 I believe--I run aftermarket coolers on almost every card, so my situation may be different. In a thread on litecoinforum somewhere, I noted that there seemed to be a relationship between temperature and increased rejects on the tahiti cards. I'm sure it's plausible to see all sorts of varying results based on temperature.


Almost all the brands use the same chip and PCB layout, with some minor differences. My MSI 7950's performed better than my Sapphire, even with the same settings. I've found that sometimes underclocking the engine will give more performance, especially if it seems performance degrades with overclocking. Just have to toy with it sometimes. A good example would be ASUS 270X cards. I've got 3 or 4 brands of 270X cards, and all of them work like a champ on the same settings, except the ASUS. If I underclock the engine on that brand, then it springs to life. It's weird.

Also it's nice to be able to monitor wattage usage at the wall, because if you see wattage increasing but your hashrate isn't, then you know you're going wrong with the settings.


Thanks. Definitely didn't want to spend what little BTC I had left on repairs.. ugh.

@vesperwillow, do you have all your rigs at temp target 65?  Mine seem to randomly reboot after a few days when I have them under 70... they seem more stable at 75 target.  To protect from heat soaking the cards, I have the overtemp set at 83.  The fans also run about 10% slower at 75 than 70.

I really need to research and understand more about how scrypt works to better understand the relationship between TC, core clock, and mem clock.  I've been using TC 21712 with the optimized bin, mem 1600 and core up to 1105... somehow I found a ratio of .69 being optimal for my 6x7950 rig with the cards averaging 665 kh and efficiency of about 2.6 kh/w... now, is that ratio ideal because of the TC I am using?  or the cards?  I'd love to eek out more efficiency over more hashes but without sacrificing overall hashrate.  

Sucks about your hardware   Wishing you a quick turnaround on repairs.

I got my hardware already. Still in boxes. I will unpack them tomorrow. I don't have risers yet, so I can only set up the rig with 2 GPUs for now.

Gigabyte 970A DS3P (can support 5 GPUs, but I only got 4)
Seasonic 1050 watts
AMD Sempron 145
2 GB RAM Zeppelin
Veggie Crate
AData USB 3.0 Flash Drive 16 GB, imaged with litecoinbamt 1.3 R9
4 Sapphire R9 270 Dual-X

All I need now are the risers and to set this all up.

Dabs First GPU Rig


More pics when this is all assembled. I have an idea to do a vertical orientation on the GPUs, and I'll flatten the profile or something.

So this weekend has just been the pits for me for mining hardware. I lose one motherboard with no spares on hand, and it'll be all week before I get another one. So there goes 2.5Mh. Then lastnight prior to bed, I smell some electric burning in the air. It's coming from the new MSI 270 rig. Not sure if it's the PSU, any of the GPUs, the USB risers or the motherboard, but after rebooting it, only 2 cards are being recognized. So there goes another 1.5mh. I'm down 4mh

C'est la vie.

If you want to push the card halfway over the cliff's egde, try these:

-I 20 -w 256 --thread-concurrency 24000 --gpu-engine 1130 --gpu-memclock 1250 --target-temp 65

I dunno if this will work for the windows version of cgminer but you could try this out, for 20-30kh more:

* Grab this file: http://goatpc.com/scrypt130511Tahitiglg2tc24000w256l4.bin
* Put it in the cgminer folder where the other .bin files are. If you get a warning that you're going to overwrite a file, that's fine--this replaces it.

Those 2 things combined usually result in 700-710kh from Tahiti 7950's.

Sure, Why not? (not likely to happen, because the best I can do is 10x my 1 bitcoin, so that becomes 10 BTC.) Unless it really goes to the moon.

Check this video out: http://www.youtube.com/watch?v=QmacHzVKpyM

300 block erupters.

If you make a million dollars, can I borrow the BTC then? 

I wish I had 11 BTC too. hehe. I spent all of my one bitcoin to buy a few billion moon coins, and I think that might have been a mistake. Well, here's hoping it goes to the moon this week.

Dabs, can I borrow... um... 11BTC.  I promise to pay you back one day.  I wish I was that kind of baller, mate.  God, I wish I was that kind of baller.

-Fuse

Cheapest I can get them is 0.11 BTC shipped from China to me, if I order 300 units. So let's pretend that Fuse orders 100, Vesper 100, me 50, and you 50, we meet the minimum 300 units to get that price. I prefer to deal with as few buyers as possible, because it's a royal headache to package 300 individual units to 300 different people.

The -g switch would probably work with a lower TC.  I couldn't guarantee you would see a difference though.  Vesper is the magician with this stuff.  I'm not sure how, but he always seems to pull some extra hashes out of his hat.  But 650kh is pretty respectable.  If the temps are good, I would leave it, but that's just me.

-Fuse

Sapphire 7950 Vapor-x was really bogging me down, at stock clocks it was at best around 350 kh/s, but I finally got it up to around 650 kh/s

-I 20 -w 256 --thread-concurrency 40960 --gpu-engine 1100 --gpu-memclock 1500 --target-temp 65

You guys see anywhere you think I could grab a few more hashes? Any attemp at using -g resulted in a crash.

Gonna let this run for the night and then on to the next cards!

using sgminer btw 

Chicken, yeah I stack them into tall racks of hash and warmth. Hehe. Aluminum sounds diesel! Mine isn't diesel, but I'd say it's about $10-$15 in material per rig, the majority of it being the PVC fittings.

@vesperwillow, Nice PVC frame.  Do you arrange them on shelves?  I went with aluminum to make them self contained and stackable.  After a few iterations, I have it down to about $50 in material for a 5/6 card rig.  The time involved is still high though, but getting better.

@Dabs, thanks for the review of the dual miner.  Interesting little device.  I am assuming the manufacturer has them priced at the absolute max the market will bear.  If they were about 25% cheaper, I'd consider some, but since my winter/summer electric rates are around $0.14/$0.17, the benefit just isn't there yet.  Certainly watching.

@Fuse, congrats on the cards   Glad they shipped faster than expected.  Good luck with assembly.

A side note from my efforts today in case anyone needs to balance dual power supplies, a 7950 pulls about 60W from the powered riser and about 150W from the PCIe plugs when running around 630kh/s.  I am wondering if the ratio is similar for other cards?

If there was one 270 card I could get to replace my other 270's with, it would probably be the MSI 270.

Anyone wanna trade cards? Haha. I love the stability, and how easy it is to get high hash out of them. I'm going to see if I can source more and sell off my other 270's.

Sweet! Keep us updated.

-Fuse