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Topic: X6500 Custom FPGA Miner - page 14. (Read 220094 times)

sr. member
Activity: 410
Merit: 252
Watercooling the world of mining
April 30, 2012, 04:30:09 PM
My Pandaboard ES runs p2pool with mpbm without major problems.

I just invested into some 50 € SD card a that does the job well.
I consider the SD I/O crucial for the systems performance.

What's your DOA rate? It was 4-7% for me before I moved p2pool to a Core2Duo box. Now it's like 1-2%.

I was testing p2pool for ~ 12 days.
I got 3.1 % DOA. Seemed ok to me.
hero member
Activity: 504
Merit: 500
FPGA Mining LLC
April 30, 2012, 02:51:07 PM
My Pandaboard ES runs p2pool with mpbm without major problems.

I just invested into some 50 € SD card a that does the job well.
I consider the SD I/O crucial for the systems performance.

What's your DOA rate? It was 4-7% for me before I moved p2pool to a Core2Duo box. Now it's like 1-2%.
legendary
Activity: 1372
Merit: 1003
April 30, 2012, 07:29:43 AM
Sorry for not reading the thread through but how well do these boards work on P2Pool compared to a normal PPS pool.  Thanks.
x6500s work the same assuming adequate available resources on the host machine.
Would a RaspberryPi be enough computing resource's for an X6500 on P2Pool?

My experience with a pandaboard shows that p2pool doesn't really work well on these platforms.
One suspicion is that SD card access might be playing a role, but I'm not sure.

OK thanks do you think a cheap second hand PC would be OK for running a farm of X6500's on P2Pool?
sr. member
Activity: 410
Merit: 252
Watercooling the world of mining
April 30, 2012, 06:39:30 AM
My Pandaboard ES runs p2pool with mpbm without major problems.

I just invested into some 50 € SD card a that does the job well.
I consider the SD I/O crucial for the systems performance.
hero member
Activity: 504
Merit: 500
FPGA Mining LLC
April 29, 2012, 06:46:01 PM
Sorry for not reading the thread through but how well do these boards work on P2Pool compared to a normal PPS pool.  Thanks.
x6500s work the same assuming adequate available resources on the host machine.
Would a RaspberryPi be enough computing resource's for an X6500 on P2Pool?

My experience with a pandaboard shows that p2pool doesn't really work well on these platforms.
One suspicion is that SD card access might be playing a role, but I'm not sure.
full member
Activity: 281
Merit: 100
April 29, 2012, 05:19:49 PM
Hey there, quick update from the mineral oil cooling front. This is what my setup looks like now:

That board on the left is a Beagle Bone which I use to run MPBM (Beagle Bone + X6500 use 20 Watt in total). I wanted to get rid of the fan, but still keep the temperature down, so I added this water tank, which helps to dissipate the heat from the mineral oil container. This way I can even add a lid to the container and still have the heat dissipate quickly enough to have the FPGA stay at around 43 to 45 °C. The miner has been running without any problems so far. There have also not been any problems with oil running along cables or anything like that.

Now, in my chemical newbness I haven't accounted for the following effect though, that I see in the water tank:


I'm not exactly sure what that stuff is, that is floating around the water. Is some of the mineral oil evaporating and then condensing again in the colder water? But it seems a little bit much for that, as I thought that mineral oil evaporation would be pretty minimal, from what I read. Or is the mineral oil attacking some of the container material? But why would it be on the outside then, where the water is, instead of on the inside of the mineral oil container?

Does anyone have an idea what is going on here?

I am not done with my oil setup but right now with 2 boards I am at 39/40c with active convection (the oil seems to thick for good natural convection). Just a bit ago I took two heatsinks and mashed them together with epoxy and submerged 1/4 of the combined heatsink (not half due to space). So far in the past few hours it lowered the temp 1c (with the same ambient temp). I have since in my inpatience put a fan on it and now it is down 1.5c. I am working with about 4 gallons so it takes some time for results. 2 days and no invalids with the 200mhz firmware.

Maybe you don't care about temps but perhaps with two good big passive heatsinks you could ditch that outer tub.

In my mind mineral oil is a good setup for expandibility. 1 fan internaly for forced convection and when you have your setup done you can just add cards to it with no need for more fans or waterblocks (heatsinks?). I don't know if a heatsink on the chips is needed but I am going to try it and see how it works. that right there would have saved me about 40$ per card.  

Update: No heatsink doesn't seem like an option. The temps were going up extremly fast so I pulled the plug after about 30 seconds @ 42c (highist I have ever been). 
legendary
Activity: 1372
Merit: 1003
April 29, 2012, 12:51:50 PM
Sorry for not reading the thread through but how well do these boards work on P2Pool compared to a normal PPS pool.  Thanks.
x6500s work the same assuming adequate available resources on the host machine.
Would a RaspberryPi be enough computing resource's for an X6500 on P2Pool?
hero member
Activity: 504
Merit: 500
FPGA Mining LLC
April 29, 2012, 04:36:36 AM
When will you have more of the x6500? Or will there be a new board  Shocked

There should be a small amount of boards in stock next week, and this should start improving in about 2-3 weeks when the next production run finishes.
jav
sr. member
Activity: 249
Merit: 251
April 29, 2012, 04:26:44 AM
Very cool to see this! I'm wondering, do you have some type of metal container you could use instead of the plastic one? That would do much more to dissipate the heat from the oil to the environment. Also helpful would be a larger mass of oil.

I don't have a metal one handy at the moment but yes, I might try that in the future. It might also help with the ooze stuff.

Although:

Definitely use a metal container with a larger volume.

I don't see why I should "definitely" use a larger volume. The setup produces zero invalids as it is already, so I don't really see the need for temperature related improvements. Or why did you suggest this?

How long has that water been in there?

A couple of weeks now. But I did change the water once before, because I was also thinking that it might just be some oil that I spilled from when I was filling the inner container. I will change the water again a couple of times and see if the effect goes away over time, but at the moment it seems very consistent. Although I don't think it is anything biological. As you said, it doesn't really fit the consistency of the stuff.
legendary
Activity: 938
Merit: 1000
What's a GPU?
April 28, 2012, 09:03:59 PM
Does anyone have an idea what is going on here?
Definitely use a metal container with a larger volume. But no, unless the mineral oil is reacting with that plastic in a very odd way...

Sorry for not reading the thread through but how well do these boards work on P2Pool compared to a normal PPS pool.  Thanks.
x6500s work the same assuming adequate available resources on the host machine.

legendary
Activity: 1372
Merit: 1003
April 28, 2012, 08:26:16 PM
Sorry for not reading the thread through but how well do these boards work on P2Pool compared to a normal PPS pool.  Thanks.
sr. member
Activity: 423
Merit: 250
April 28, 2012, 07:06:07 PM
When will you have more of the x6500? Or will there be a new board  Shocked
hero member
Activity: 504
Merit: 500
FPGA Mining LLC
April 28, 2012, 06:21:29 PM
How long has that water been in there?

I'm not an expert on that area, but I could think of three possibilities:
  • Perfect temperature for some micro-organisms to populate the outside of the oil tank
  • Some dirt that was in the water (or water tank) from the beginning relocating itself to the outside of the oil tank due to thermal effects
  • The plastic tank "sweating" something wax-ish that is frozen by the cold water on the outside

The first option seems most likely to me, but the consistency of that ooze seems weird for that.
hero member
Activity: 720
Merit: 528
April 28, 2012, 06:12:11 PM
Hey there, quick update from the mineral oil cooling front. This is what my setup looks like now:



That board on the left is a Beagle Bone which I use to run MPBM (Beagle Bone + X6500 use 20 Watt in total). I wanted to get rid of the fan, but still keep the temperature down, so I added this water tank, which helps to dissipate the heat from the mineral oil container. This way I can even add a lid to the container and still have the heat dissipate quickly enough to have the FPGA stay at around 43 to 45 °C. The miner has been running without any problems so far. There have also not been any problems with oil running along cables or anything like that.

Very cool to see this! I'm wondering, do you have some type of metal container you could use instead of the plastic one? That would do much more to dissipate the heat from the oil to the environment. Also helpful would be a larger mass of oil.
jav
sr. member
Activity: 249
Merit: 251
April 28, 2012, 05:51:16 PM
Hey there, quick update from the mineral oil cooling front. This is what my setup looks like now:



That board on the left is a Beagle Bone which I use to run MPBM (Beagle Bone + X6500 use 20 Watt in total). I wanted to get rid of the fan, but still keep the temperature down, so I added this water tank, which helps to dissipate the heat from the mineral oil container. This way I can even add a lid to the container and still have the heat dissipate quickly enough to have the FPGA stay at around 43 to 45 °C. The miner has been running without any problems so far. There have also not been any problems with oil running along cables or anything like that.

Now, in my chemical newbness I haven't accounted for the following effect though, that I see in the water tank:





I'm not exactly sure what that stuff is, that is floating around the water. Is some of the mineral oil evaporating and then condensing again in the colder water? But it seems a little bit much for that, as I thought that mineral oil evaporation would be pretty minimal, from what I read. Or is the mineral oil attacking some of the container material? But why would it be on the outside then, where the water is, instead of on the inside of the mineral oil container?

Does anyone have an idea what is going on here?
sr. member
Activity: 447
Merit: 250
April 25, 2012, 11:05:32 PM
This actually looks like the board aren't powered properly. (They USB interface logic is powered by the USB bus, however the FPGAs aren't.)

Ah, I think you just helped me figure it out.  I was trying to use the modified molex connectors with the 12V/5V swapped that worked on the rev 2 boards but it looks like the rev 3 boards are only connected on the 12v so it was not probably not getting any power!

Yes, the Rev3 boards use the 12V rail of the molex connector.

power is not my issue as they work properly using the old x6500 miner software. not really sure what is up, but in the process of building a dedicated ubuntu machine to control all of mine instead of my shitty mac.
hero member
Activity: 784
Merit: 500
April 23, 2012, 05:47:34 PM
http://www.caseking.de/shop/catalog/Watercooling/Chipset-Coolers/Watercool/Watercool-Heatkiller-NB-MICRO::4374.html

This watercooler could fit too and do the job (Its a block of Chopper and no fancy cooling technicis inside)Smiley

I have one here and it looks like it fits onto Ztex boards so it could fit onto x6500 aswell?. One odd thing is the tubing (6/8) and you need T-Adapters for normal Watercooling integration.

hero member
Activity: 504
Merit: 500
FPGA Mining LLC
April 23, 2012, 09:51:52 AM
This actually looks like the board aren't powered properly. (They USB interface logic is powered by the USB bus, however the FPGAs aren't.)

Ah, I think you just helped me figure it out.  I was trying to use the modified molex connectors with the 12V/5V swapped that worked on the rev 2 boards but it looks like the rev 3 boards are only connected on the 12v so it was not probably not getting any power!

Yes, the Rev3 boards use the 12V rail of the molex connector.
donator
Activity: 362
Merit: 250
April 23, 2012, 09:27:41 AM
This actually looks like the board aren't powered properly. (They USB interface logic is powered by the USB bus, however the FPGAs aren't.)

Ah, I think you just helped me figure it out.  I was trying to use the modified molex connectors with the 12V/5V swapped that worked on the rev 2 boards but it looks like the rev 3 boards are only connected on the 12v so it was not probably not getting any power!


hero member
Activity: 504
Merit: 500
FPGA Mining LLC
April 23, 2012, 06:03:09 AM
So does program.py not work to program the new rev of boards? I get this error on both

Code:
2012-04-16 21:45:07 | Device 3 opened (A4014PHJ)
Traceback (most recent call last):
  File "program.py", line 91, in
    fpga.detect()
  File "/Users/christian/x6500-6/fpga.py", line 82, in detect
    with self.ft232r.lock: self.jtag.detect()
  File "/Users/christian/x6500-6/jtag.py", line 81, in detect
    raise NoDevicesDetected

Shows up in listDevices.py fine though?


Did you ever get this working?  I'm trying to run some rev 3 boards and I'm having the exact same problem, but in Linux.  The rev 2 boards work fine but the rev 3s report the NoDevicesDetected error when attempting to load the bitstream even though the hotplug manager worker is able to detect them.  I'm running the latest MPBM testing branch and have checked all the cables.  I'm manually disabling ftdi_sio prior to running MPBM but I'm going to try blacklisting it again next, however that will cause problems with other boards.

This actually looks like the board aren't powered properly. (They USB interface logic is powered by the USB bus, however the FPGAs aren't.)
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