Avalon Water Cooling

[crumbs]

Let me get you your daily fix of pr0n:
No pics of the illustrious cavity though

Thank you
Dollars to donuts it's a plain vanilla package, and cheap alum. video ram heatsinks would improve air cooling for almost no money/time/risk. 
*I don't own an avalon rig, perhaps due to wagering dollars against donuts too often. 

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[bitbeast]

I removed all my PCB's from the heat sinks once more and applied thermal compound

- Based on my own experience, I can only say that MX-2 is not quite effective thermal compound.

I do believe that Zalman ZM-STG2 could be a better choice for you:





But it seems I'm late with my good advice.

[el_rlee]

Did you do anything to control the thermal compound layer thickness in those tests?

No

[aTg]

What a great job you did, I thank you sincerely share the results.

A contribution, if you want to put 2 PCBs in one block, turn the pcb so that each "backplane" stay in a different side of the block.

[rudrigorc2]

And look what they changed for batch3:

[el_rlee]

What a great job you did, I thank you sincerely share the results.

Thank you for your posting. Just for you the following pictures:

[el_rlee]

Took me from 21st of May until now, almost 8 weeks later!

[turtle83]

Took me from 21st of May until now, almost 8 weeks later!

Is the plumbing to each block in serial or parallel?

[MacDschie]

Looks great!

What's your hashrate and clock speed? I'm very interested in those numbers to compare them to my own:

I have tried to cool down my Avalon with an A/C like in this thread: https://bitcointalk.org/index.php?topic=242423.0

Temps look fine: 15-19°C in the casing, 33-40°C at the blocks (Chip temp was below 50° all the time).
But the hashrates are exactly the same as without the A/C, at 29° in the case and 45° at the blocks. Even at 50° block temp I have the same maximum hashing speed of ~82-83 GH/s @ 355 MHz. If I cramp up the clock, hardware errors increase so much that the hash rate drops down.

The only difference I noticed when using the A/C is that I could run speeds like 400 MHz (with ~50% HW errors and hashrates <70 GH/s). Without the A/C, the highest clock speed is 385 MHz (also with high HW errors and lower hashing speed).

Has anyone noticed the same increase in HW error rate when cramping up the clock speed above 350-360? This seems to be a barrier, regardless of the cooling. I was thinking of a water or oil cooling myself, but now, the only reason to do this would be to reduce the noise.

[el_rlee]

Looks great!

What's your hashrate and clock speed? I'm very interested in those numbers to compare them to my own:

I have tried to cool down my Avalon with an A/C like in this thread: https://bitcointalk.org/index.php?topic=242423.0

Temps look fine: 15-19°C in the casing, 33-40°C at the blocks (Chip temp was below 50° all the time).
But the hashrates are exactly the same as without the A/C, at 29° in the case and 45° at the blocks. Even at 50° block temp I have the same maximum hashing speed of ~82-83 GH/s @ 355 MHz. If I cramp up the clock, hardware errors increase so much that the hash rate drops down.

The only difference I noticed when using the A/C is that I could run speeds like 400 MHz (with ~50% HW errors and hashrates <70 GH/s). Without the A/C, the highest clock speed is 385 MHz (also with high HW errors and lower hashing speed).

Has anyone noticed the same increase in HW error rate when cramping up the clock speed above 350-360? This seems to be a barrier, regardless of the cooling. I was thinking of a water or oil cooling myself, but now, the only reason to do this would be to reduce the noise.

I've posted this before, together with temperatures - read back on this thread.

Took me from 21st of May until now, almost 8 weeks later!

Is the plumbing to each block in serial or parallel?

3 piece (one Avalon) serial, the individual Avalon's parallel. Gotta say that all parallel would suit the pump better probably, also a bigger diameter hose would be nice. But as said before it wouldn't improve the hashrate any more so I didn't bother to change it.

Please note that the two hoses to the water bottle are short circuited near the pump, so normally there is nothing running up and down.

[tarui]

el_rlee

have u considered using fins inside the cooling loop and reducing the amount of g 1/4 openings?

[el_rlee]

el_rlee

have u considered using fins inside the cooling loop and reducing the amount of g 1/4 openings?

Yes. To be honest I wanted to do a serpentine like channel first, with a cover and a sealing but I couldn't manage the manufacturing drawing. A work colleague helped with this one and he did it in like one hour or so...
Also the fittings cost a dime a dozen and you almost have certainty that nothing will be leaking.

[tarui]

el_rlee

have u considered using fins inside the cooling loop and reducing the amount of g 1/4 openings?

Yes. To be honest I wanted to do a serpentine like channel first, with a cover and a sealing but I couldn't manage the manufacturing drawing. A work colleague helped with this one and he did it in like one hour or so...
Also the fittings cost a dime a dozen and you almost have certainty that nothing will be leaking.

do u have access to manufacturing of the waterblocks? or do u just design them then pass to some factory to mill it out?

i;m thinking of design some simple waterblocks after my exams end.

[el_rlee]

I did mine with a vendor of my company. They were not too inclined to do it for a low price because of the low quantity.

[tarui]

I did mine with a vendor of my company. They were not too inclined to do it for a low price because of the low quantity.

where are u located?

if i were to design or roughly sketch one, are u able to manufacture it?

[el_rlee]

I did mine with a vendor of my company. They were not too inclined to do it for a low price because of the low quantity.

where are u located?

if i were to design or roughly sketch one, are u able to manufacture it?

I could certainly get you a quote. Shanghai.
What would the volume be?

[tarui]

I did mine with a vendor of my company. They were not too inclined to do it for a low price because of the low quantity.

where are u located?

if i were to design or roughly sketch one, are u able to manufacture it?

I could certainly get you a quote. Shanghai.
What would the volume be?

That would depend on how many avalon owners are interested.

[tarui]

are u making this for manufacturing?

[el_rlee]

are u making this for manufacturing?

If you tell me a desired volume I can get you quote. For delivery cost I would need a location. Do you need the water blocks only or the whole system?

[tarui]

are u making this for manufacturing?

If you tell me a desired volume I can get you quote. For delivery cost I would need a location. Do you need the water blocks only or the whole system?

are those g 1/4"  threads on the fittings?