|
Where are you shipping from? Might be interested.
|
|
|
|
|
I also run 4 S4s per 30A PDU.
|
|
|
|
If I owned bitmaintech I would not rush to the next chip.
If I owned bitmaintech I'd stop releasing miners until I had fixed the broken ones sold to clients. |
|
|
|
I have fourteen (14) IBM 2880W PSU's with breakout boards sitting around the house waiting to be used on something. Maybe I will get lucky and not have to worry about a stock PSU going out on my S4's. If it occurs, I will be ready.
PS - Is anyone else having issues with not being notified of a post in a forum you are "watching" and have told it to "notify" you?
I am also about to give a try to those 2880W PSU for my faulty S4 PSU's. I still have to figure things out about what plugs/connectors/wires I need. Working with 240V is not something usual for me. Hey, I thought there was no new messages in most of the thread I'm watching... Which doesn't make sense. So I guess there's something wrong with the forums right now. 30A 2 pole breaker, 10-2 wire, L6-30 R, 240V 30A PDU, C19-C20 cables for connecting PSUs to PDU. Best way to do it.  |
|
|
|
Replacement PSU's are pretty expensive... I thought the newer batches had better PSU's? Am I incorrect?
Mine was batch 2, and failed shortly after the 90 day warranty. Buyer beware, Bitmain uses low quality PSUs for their miners. M Mine are batch 2 I believe and no issues so far. *Crosses fingers*. It should not make a difference but I have only ran 110 on them. I have blown dust out of the machines twice I think since getting them. No issues so far with mine. Weird, I ran all of mine on 240v and they still died. Running on 240 vs 120 is easier on a PSU, unless these PSUs somehow prefer 120v. Either you're really lucky so far, or I'm really unlucky. The three I have at the moment were all purchased at same time. So I could have got lucky on the batch of PSU's. But 110 Volt entire life of all the miners. They do stay clean though. Getting ready for summer mining was what caused me to open them up and clean. Only 1 out of the 3 had a mild bit of dust, other 2 looked great. They were mostly ran in pretty cold weather with mining in winter, not sure if ambient conditions could play a role. Sounds like we have very similar conditions. Mine are basically dust fee, and ran between 0c-10c for most of the winter with occasional temps of 20-25c when I was working in the garage. |
|
|
|
Replacement PSU's are pretty expensive... I thought the newer batches had better PSU's? Am I incorrect?
Mine was batch 2, and failed shortly after the 90 day warranty. Buyer beware, Bitmain uses low quality PSUs for their miners. M Mine are batch 2 I believe and no issues so far. *Crosses fingers*. It should not make a difference but I have only ran 110 on them. I have blown dust out of the machines twice I think since getting them. No issues so far with mine. Weird, I ran all of mine on 240v and they still died. Running on 240 vs 120 is easier on a PSU, unless these PSUs somehow prefer 120v. Either you're really lucky so far, or I'm really unlucky. |
|
|
|
|
Very good price for superb quality PSUs. These are made by Delta, they are basically server PSUs in ATX form factor. Have one powering a Titan right now.
May I ask why the original 2 had to be RMAed?
|
|
|
|
So I'm a newb when it comes to overclocking... I'm in canada so we have 120v outlets, what's the safest max I should overclock to? (Could, maybe not should)..
You shouldn't, the stock PSU can't even handle running stock. You should also consider installing a 240V outlet if you have a few miners. This information is incorrect. I have been able to overclock to 212.5 100% of the time with no issues whatsover on stock PSU running on 110V. Yielding about a 5.5% increase in hashrate. A majority of the units I have experience with, will overclock at 225M with no problems. Just make sure your ambient temp is cool enough to keep the S4 at sub 65C temps. If you can't keep temps cool enough you will start loosing chips and they'll show up with X or completely missing from the status. And I've had more than 1 PSU fail running at 200MHz. Hard to say who's right. At 225MHz and stock voltage, the entire miner (4 hash boards + controller + fans) draws exactly 120A DC from the PSU, and the PSU is rated for 120A. If it were a quality unit, there wouldn't be any problem running 225MHz on it, but it isn't. I'm convinced that all of the S4 PSUs will have died within 6 months max. If you're going to overclock with it, make sure you have a backup ready or you'll be pissed when your S4 is a temporary paperweight and you lose all the ground you made by running overclocked. Better yet, replace it now and have peace of mind. Replacement PSU's are pretty expensive... I thought the newer batches had better PSU's? Am I incorrect? The trick is using cheap (but much better quality than ATX) server PSUs. I picked up 2x 2880w server PSUs for 90$ the other day. The batch 2 and newer PSUs were improved vs batch 1, but they're still terrible. If your PSU has a sticker on the side of it, it's the newer model. I've had failures with B1 and B2+ PSUs. |
|
|
|
So I'm a newb when it comes to overclocking... I'm in canada so we have 120v outlets, what's the safest max I should overclock to? (Could, maybe not should)..
You shouldn't, the stock PSU can't even handle running stock. You should also consider installing a 240V outlet if you have a few miners. This information is incorrect. I have been able to overclock to 212.5 100% of the time with no issues whatsover on stock PSU running on 110V. Yielding about a 5.5% increase in hashrate. A majority of the units I have experience with, will overclock at 225M with no problems. Just make sure your ambient temp is cool enough to keep the S4 at sub 65C temps. If you can't keep temps cool enough you will start loosing chips and they'll show up with X or completely missing from the status. And I've had more than 1 PSU fail running at 200MHz. Hard to say who's right. At 225MHz and stock voltage, the entire miner (4 hash boards + controller + fans) draws exactly 120A DC from the PSU, and the PSU is rated for 120A. If it were a quality unit, there wouldn't be any problem running 225MHz on it, but it isn't. I'm convinced that all of the S4 PSUs will have died within 6 months max. If you're going to overclock with it, make sure you have a backup ready or you'll be pissed when your S4 is a temporary paperweight and you lose all the ground you made by running overclocked. Better yet, replace it now and have peace of mind. |
|
|
|
I have some stupid questions. I havent mined anything in a long time. However, I wanted to fire up a rig to see how it does...
But I have seem to gone full retard. I cant get sgminer to 1) show the mining console once it starts and 2) get valid shares. Right now my invalid shares (using LTCRabbit as a test) are hovering around 90%. Something is very wrong
Both rigs that Im testing are Windows (and I literally know almost nothing about Windows). But here are the specs:
Rig 1# - Windows 8.1
2x R9 290x
Catalyst 13.12
SGMiner v5
and BFGMiner
Rig 2 - Windows 7
2x MSI 7950
SGMiner v5
Is there a breakdown for people like me who dont know how to use Windows to get one of these running? I dont care which one. Just want to get it working properly so I can make adjustments, add cards, etc...you know, all the fun stuff that I [can] handle on Linux without help
Why bother with Windows if you're a Linux guy? Get this: http://www.getpimp.org/ |
|
|
|
So I'm a newb when it comes to overclocking... I'm in canada so we have 120v outlets, what's the safest max I should overclock to? (Could, maybe not should)..
You shouldn't, the stock PSU can't even handle running stock. You should also consider installing a 240V outlet if you have a few miners. |
|
|
|
Is there a way to prevent the display card from running slower than it should while mining qubit?  The slower running card is a 290x. |
|
|
|
|
Can't connect to solo LTC through miningrigrentals.
Any plans on creating a westhash solo pool for us North American folk?
|
|
|
|
I solved my low fan/hash rate issue by putting the miner on 240V
the S4s seem to like the higer voltage and even at 60c I get over 2100GH now for 1.45KW
By chance do you have a kill-a-watt you can put on it? I'm happy you fixed it just curious of how many watts it's pulling. theres no killowatt I know of that has a 240V plug.. I have a metered PDU http://www.nextwarehouse.com/item/?326761_g10eeach side has its own amp mesurement so i have each s4 on a sepratate side. Right now it shows 6 amps used for each s4 for a total of 1440 watts There's no Kill-A-Watt but there's definitely knockoffs available for 220/240V receptacles. Might want to consider an amp clamp instead for measuring 240v AC. Also handy for measuring DC amperage from the PSU and calculating a PSU's efficiency. Most commonly available clamp ammeter do not allow you to measure DC using the clamp. True, you'd need a higher end amp clamp. |
|
|
|
No problem guys. One thing to note is that not all K-A-W will display the proper voltage. I have 3, and only 1 shows the proper voltage when running on 240v. Double check with a multimeter to be sure. If it doesn't read the voltage properly, the watt reading will be incorrect. They always read amperage properly, so you'll need to multiply A x V (actual volts measured with multimeter) to get your true watts.
BitmainWarranty, any news from the higher ups on what is going to be done about the S4 problems?
This won't work for the type of outlets i have I have a PDU with the femaie outlets. The metered PDU i have works fine I replaced the C13 side of a PDU cable with a 5-15 R to be able to use the K-A-W when needed. |
|
|
|
I'm getting only 5.4MH/s on Qubit with a 290x @ 1000/1375. Can anyone suggest better settings?
That actually sounds close to right. Alright, thanks. I was expecting better since a 280X can get me ~5.1MH/s @ 1060/1500. Ah well. Thanks for posting your settings, smokiepot. |
|
|
|
|
I'm getting only 5.4MH/s on Qubit with a 290x @ 1000/1375. Can anyone suggest better settings?
|
|
|
|
|
No problem. I'll leave it up for a few days in case you have issues again, and remove it by the end of this weekend.
|
|
|
|
|
Show Posts
