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[davecoin]

Just wanted to post about my chips on a new full rig. Results are on autotune.

Of 256 chips:

noncerate  = 0.000 = 2 chips
                < 0.250 = 2
                < 0.500 = 3
                < 1.000 = 2
                < 1.250 = 3
                < 1.500 = 1

That's 13 chips that are damn near worthless.  I have the rig stable up to 544 GH/s now, but I'm still bummed about the loss in hashrate. In contrast, my older full rig (Oct) has only 2 chips with a noncerate under 1.000 and has zero dead chips.

PSU: Corsair HX1050 Gold
Cooling: 20" Box Fan
    

[allinvain]

Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu

 I suspect this is the cause of all your problems right here That's BARELY enough to power a full rig.

 I <3 anything Corsair in the 850W range for these guys.

I don't think that's true though. According to my power meter a full rig with v2.3 h-cards (the pci ones) is consuming 450 watts at 520 gh. 450 watts is at the wall of course.

But I still think that it would likely be better to give the power supply more room to breathe. Voltage ripple on the 12V rail is likely to occur more frequently at higher loads and the h-cards may not like this.

I think another solution would be to trim down the full rig by 4 h-cards. I was told by punin (from Bitfury Strikes Back -bfsb) that 12 h-cards is a more stable config.

[klondike_bar]

Just wanted to post about my chips on a new full rig. Results are on autotune.

Of 256 chips:

noncerate  = 0.000 = 2 chips
                < 0.250 = 2
                < 0.500 = 3
                < 1.000 = 2
                < 1.250 = 3
                < 1.500 = 1

That's 13 chips that are damn near worthless.  I have the rig stable up to 544 GH/s now, but I'm still bummed about the loss in hashrate. In contrast, my older full rig (Oct) has only 2 chips with a noncerate under 1.000 and has zero dead chips.

PSU: Corsair HX1050 Gold
Cooling: 20" Box Fan
    

544GH is quite a good speed though perhaps with time and tuning the bad cjips will come back on. I had a 'dead' chip on my september starter kit that suddenly began working after a few days of runiing at a higher voltage.

also, my 6 new V1.2 cards are modded to 1.7 kOhm on R02F and are running at 34.5GH average

[bkpduke]

One thing that does suck about these rigs is that they do not run very stable when fully populated (ie all 16 cards installed).

This is very dependent upon power supplies.  You need a beefy PSU with stable 12V rails in order to keep the amperage even to all 16 cards.

Hmm, do you have any recommendations. Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu but I'm thinking of buying something more beefy. I have in mind the AX860 series.

Just pay close attention to the 12V rails.  I am using a couple older PC P&C 750W PSUs, but these are not built anymore.  I also have a 1KW Coolermaster Gold Series that I use to power two full rigs.

[bkpduke]

Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu

 I suspect this is the cause of all your problems right here That's BARELY enough to power a full rig.

 I <3 anything Corsair in the 850W range for these guys.

I don't think that's true though. According to my power meter a full rig with v2.3 h-cards (the pci ones) is consuming 450 watts at 520 gh. 450 watts is at the wall of course.

But I still think that it would likely be better to give the power supply more room to breathe. Voltage ripple on the 12V rail is likely to occur more frequently at higher loads and the h-cards may not like this.

I think another solution would be to trim down the full rig by 4 h-cards. I was told by punin (from Bitfury Strikes Back -bfsb) that 12 h-cards is a more stable config.

Keep in mind that you are asking these PSUs to push all that power over the 12V PCI-Express power leads.  They were NOT designed to do this.  They were instead designed to push about 50% of their power over the main ATX connector to a motherboard.  That is why you need PSUs that are spec'd far above what the actual power draw is on a full rig -- the 12V rails for the PCI-Express power leads were never designed with that in mind.

[Doff]

  maybe he/she meant mining s/w auto to backup pool.

You would have to use your own stratum proxy/gateway or use bfgminer. Chainminer by default does not offer failover support. On the miner's web page if you set multiple pools it just splits the workload.

Yeah this is what I mean, sucks when a pool goes down. I suppose I could move over to p2pool as well, didn't know the miner worked with it.

[bobsag3]

Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu

 I suspect this is the cause of all your problems right here That's BARELY enough to power a full rig.

 I <3 anything Corsair in the 850W range for these guys.

I don't think that's true though. According to my power meter a full rig with v2.3 h-cards (the pci ones) is consuming 450 watts at 520 gh. 450 watts is at the wall of course.

But I still think that it would likely be better to give the power supply more room to breathe. Voltage ripple on the 12V rail is likely to occur more frequently at higher loads and the h-cards may not like this.

I think another solution would be to trim down the full rig by 4 h-cards. I was told by punin (from Bitfury Strikes Back -bfsb) that 12 h-cards is a more stable config.

Keep in mind that you are asking these PSUs to push all that power over the 12V PCI-Express power leads.  They were NOT designed to do this.  They were instead designed to push about 50% of their power over the main ATX connector to a motherboard.  That is why you need PSUs that are spec'd far above what the actual power draw is on a full rig -- the 12V rails for the PCI-Express power leads were never designed with that in mind.

Several PSUs- like the EVGA 1300g2, can run almost their entire Amperage over PCIe. I think the evga can do almost 110A @ 12v, or 99.7% of its rated 1300w

[xzempt]

Just wanted to post about my chips on a new full rig. Results are on autotune.

Of 256 chips:

noncerate  = 0.000 = 2 chips
                < 0.250 = 2
                < 0.500 = 3
                < 1.000 = 2
                < 1.250 = 3
                < 1.500 = 1

That's 13 chips that are damn near worthless.  I have the rig stable up to 544 GH/s now, but I'm still bummed about the loss in hashrate. In contrast, my older full rig (Oct) has only 2 chips with a noncerate under 1.000 and has zero dead chips.

PSU: Corsair HX1050 Gold
Cooling: 20" Box Fan
    

544GH is quite a good speed though perhaps with time and tuning the bad cjips will come back on. I had a 'dead' chip on my september starter kit that suddenly began working after a few days of runiing at a higher voltage.

also, my 6 new V1.2 cards are modded to 1.7 kOhm on R02F and are running at 34.5GH average

Only in the world of bitcoin can someone promise 400ghs..... and have people Complain it only gets 544ghs....    i dont get it?    Bitfury and Megabigpower rock!

[Syke]

Bitmain just dropped their prices to 2.2 BTC for 180 GH/s. Dave, don't let them get away with all the orders. Time to drop the prices again!

[americandesi]

Bitmain just dropped their prices to 2.2 BTC for 180 GH/s. Dave, don't let them get away with all the orders. Time to drop the prices again!

Where did you get this news from.?

[zurg]

Bitmain just dropped their prices to 2.2 BTC for 180 GH/s. Dave, don't let them get away with all the orders. Time to drop the prices again!

Where did you get this news from.?

On the Bitmains site. I don't know what it was before.. so...

[Xian01]

Bitmain just dropped their prices to 2.2 BTC for 180 GH/s. Dave, don't let them get away with all the orders. Time to drop the prices again!

Where did you get this news from.?

https://bitcointalk.org/index.php?topic=417159.0

 Pre-Chinese New Year sale coming up.

[davecoin]

Just wanted to post about my chips on a new full rig. Results are on autotune.

Of 256 chips:

noncerate  = 0.000 = 2 chips
                < 0.250 = 2
                < 0.500 = 3
                < 1.000 = 2
                < 1.250 = 3
                < 1.500 = 1

That's 13 chips that are damn near worthless.  I have the rig stable up to 544 GH/s now, but I'm still bummed about the loss in hashrate. In contrast, my older full rig (Oct) has only 2 chips with a noncerate under 1.000 and has zero dead chips.

PSU: Corsair HX1050 Gold
Cooling: 20" Box Fan
    

544GH is quite a good speed though perhaps with time and tuning the bad cjips will come back on. I had a 'dead' chip on my september starter kit that suddenly began working after a few days of runiing at a higher voltage.

also, my 6 new V1.2 cards are modded to 1.7 kOhm on R02F and are running at 34.5GH average

Only in the world of bitcoin can someone promise 400ghs..... and have people Complain it only gets 544ghs....    i dont get it?    Bitfury and Megabigpower rock!

Not complaining. Simply making a comparison between 2 products I was expecting to be identical (or nearly identical).  Bitfury and Megabigpower do indeed rock.  I've had nothing but amazing service from both Dave and Yvonne.

[Trongersoll]

Once again I've proven that they shouldn't let this Software guy play with hardware. I plugged in an H board backwards and got smoke.  One of these days I'll learn. 

[Powell]

Would be pretty sweet if they ran a sale also! 

[klondike_bar]

Bitmain just dropped their prices to 2.2 BTC for 180 GH/s. Dave, don't let them get away with all the orders. Time to drop the prices again!

to be competitive, an H-board (lets assume it CAN go 30GH without much trouble) will have to be around 2.2/6 = 0.4 BTC (assume a little extra because of the power efficiency)

right now at ~0.5BTC each they could use a slight drop further

[Swimmer63]

Received my new 1/2 kit yesterday and got it working today.  My first one is a v1 with 16 boards at 460 Gh/s.  It has one bad port and some of the boards are EOL's that don't hash much.
But this new kit out of the box is going 240 Gh/s.  No tuning or anything.  So once I set up decent cooling I should be able to get 300 Gh/s out of it.

Has anyone heard from Spotwood???  I sent him an email and posted on his thread that I wanted a new case.  But it's been days with no reply.

[pixl8tr]

Received my new 1/2 kit yesterday and got it working today.  My first one is a v1 with 16 boards at 460 Gh/s.  It has one bad port and some of the boards are EOL's that don't hash much.
But this new kit out of the box is going 240 Gh/s.  No tuning or anything.  So once I set up decent cooling I should be able to get 300 Gh/s out of it.

Has anyone heard from Spotwood???  I sent him an email and posted on his thread that I wanted a new case.  But it's been days with no reply.

Might want to send him another email.  I know he has an 11 week backorder on cases.   So I assume he is busy in his shop.  ;-)

[tom99]

Received my new 1/2 kit yesterday and got it working today.  My first one is a v1 with 16 boards at 460 Gh/s.  It has one bad port and some of the boards are EOL's that don't hash much.
But this new kit out of the box is going 240 Gh/s.  No tuning or anything.  So once I set up decent cooling I should be able to get 300 Gh/s out of it.

Has anyone heard from Spotwood???  I sent him an email and posted on his thread that I wanted a new case.  But it's been days with no reply.

  wait time is going to be like 5 or 6 week and long waiting list.

[allinvain]

Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu

 I suspect this is the cause of all your problems right here That's BARELY enough to power a full rig.

 I <3 anything Corsair in the 850W range for these guys.

I don't think that's true though. According to my power meter a full rig with v2.3 h-cards (the pci ones) is consuming 450 watts at 520 gh. 450 watts is at the wall of course.

But I still think that it would likely be better to give the power supply more room to breathe. Voltage ripple on the 12V rail is likely to occur more frequently at higher loads and the h-cards may not like this.

I think another solution would be to trim down the full rig by 4 h-cards. I was told by punin (from Bitfury Strikes Back -bfsb) that 12 h-cards is a more stable config.

Keep in mind that you are asking these PSUs to push all that power over the 12V PCI-Express power leads.  They were NOT designed to do this.  They were instead designed to push about 50% of their power over the main ATX connector to a motherboard.  That is why you need PSUs that are spec'd far above what the actual power draw is on a full rig -- the 12V rails for the PCI-Express power leads were never designed with that in mind.

Well you may be right or not, but personally I'm not so sure if PSU are designed to push 50% of their power to the mobo. That would be a LOT of power to serve the needs of the motherboard and cpu. From my understanding with a single rail design it should not matter which connectors are being used as they are all drawing from the same rail. Also these days GPUs are the biggest power hogs so the PCIE express connectors usually draw the most power by a long shot.

What a horrible flaky design these bitfury rigs are. Why could they not have included more PCIE connectors to spread the load more evenly or even make use of the mobo CPU connector - anything to ensure that the m-boards and thus the cards get reliable power.

Right now one v3 m-board rig is being powered by an AX860 PSU and another v2.3 m-board rig is being powered by a 1000W OCZ EliteXtreme PSU. I wish I know if these were adequate.

However even with a 1000w supply (single rail) the rig is not stable. I think the main cause of instability is running all 16 cards at once. I am going to look into splitting up my rigs as I'm tired of constantly having to mess with these miners. I may as well just give up and buy a KNCMiner Jupiter.

lol, anyone want to swap hardware ?