The Habanero - 650GH/s - OOS

[MrTeal]

That is interesting, there wasn't any reference to an included one on the VNC webpage.

The difference is that is cut out of a piece of plate and you use a pad to allow it to be pressed against the capacitors, with the majority of the force pushing down on those delicate ceramic caps (unless they've changed it recently).

https://www.dropbox.com/s/vddqqeyg0fx5kfr/heat%20sink%20back%20plate%20pic.htm

With our design, it is much larger (almost a full 120mm square) and is in contact with the board itself to help dissipate heat from the board. That's done by milling out pockets under the ASIC to allow the decoupling caps to sit in. This also puts the stress of the mounting pressure on the board instead of on the relatively fragile ceramic caps. The backplate itself is screwed to the board using 6-32 screws with a 105mm hole spacing, so you can mount a standoff and easily install a 120mm fan blowing on the bottom side if you don't have them in case with airflow around it.

Sorry if I missed that, what are the physical dimensions of the Habanero boards?

An easy question to answer for the night. 5.5"x11"

[MrTeal]

Hey everyone,
I got back home today after being down for the first part of the build, and I'm extremely tired after a few long days and an hour of sleep last night so this update will be short.

At this point, boards are rolling off the line and making their way through program and test. The majority of the orders place through the website should be able to ship here shortly, so you should start seeing boards in the wild early next week. Right now they boards are programmed and tested at 875MHz which will correspond to a little better than 650GH/s. Like the other HF based devices there's no provision right now for changing the voltage through cgminer, but we will be putting out a tool in order to allow users to change the voltage (to each die individually, if you really want to tweak) which will allow really pushing the boards, or scaling back clocks and volts in the summer to reduce heat load.

More substance and pictures tomorrow.

[VinceSamios]

Right now they boards are programmed and tested at 875MHz which will correspond to a little better than 650GH/s.

Nice one - I've got two of the VMC produced boards - one I can't push past 850mhz, and the other I can't push past 825mhz - Both sit around 90-92 degrees C.

Looks like PepperMining is producing a very nice board here. Although I think like all HF based boards removing the heat is going to be the challenge. I think your tool is going to be a major major advantage for tweaking these boards.

Nice work. I might just have to order one.

[nexus99]

Now we need to know which PSU and cooler to purchase.

[cedivad]

Nice one - I've got two of the VMC produced boards - one I can't push past 850mhz, and the other I can't push past 825mhz - Both sit around 90-92 degrees C.

What version? The "512GH" one, right?

[VinceSamios]

Nice one - I've got two of the VMC produced boards - one I can't push past 850mhz, and the other I can't push past 825mhz - Both sit around 90-92 degrees C.

What version? The "512GH" one, right?

No, the "750gh/s" ones... although I wouldn't bank on more than 650gh/s

I've done a video on it which should be up on http://youtube.com/cryptocurrency in about 24 hours (go and subscribe :-) - there's already a video of the 512gh/s card (which clocked more like 520+gh/s)

[cedivad]

So options: 1) VMC can't follow the blueprints for the evo board, 2) There is a high % of boards that is limited in his speed in the VMC process or 3) the evo board itself sucks.

I must admit that I'm undecided.

[VinceSamios]

So options: 1) VMC can't follow the blueprints for the evo board, 2) There is a high % of boards that is limited in his speed in the VMC process or 3) the evo board itself sucks.

I must admit that I'm undecided.

Personally I think it's impractical for anyone but the most hardcore tech-head to be able to remove the amount of heat coming from these chips. I defo believe the peppermining board is a better design and their software will allow folks to get a lot more out of the chips, but IMHO the price is a little steep relatively speaking considering the plausible additional hashrate average joe could achieve.

That said, from the specs I've seen posted by MrTeal and Gateway I get the feeling the w/gh will be better from the habanero, although $250 worth of improvement? I'm not sure....

[h@shKraker]

Now we need to know which PSU and cooler to purchase.

Nexus99,

I'm going with a Corsair H100 for cooling (found at newegg or whichever getting place you use).  For PSU I'm using Dell Z750P units (http://www.ebay.com/itm/OEM-Dell-PowerEdge-2950-Z750P-00-RX833-0RX833-7001072-Y000-Server-Power-Supply-/251533148025?pt=PCA_UPS&hash=item3a908b3f79) coupled with a gekkoscience Dell PSU breakout board (i.e. sidehack's breakout board http://www.gekkoscience.com/products/D750_supply_breakout_board.html).  Right now I have a couple of those pulling between 920W and 950W at the wall.  From that you can tell that over committing the PSU is WAY possible *without* much chance of the magic smoke coming out.  On another note, does anyone know if the HashFast Minepeon image work as the miner for these boards?  Hope this helps.

H@shKraker

[VinceSamios]

Now we need to know which PSU and cooler to purchase.

Nexus99,

I'm going with a Corsair H100 for cooling (found at newegg or whichever getting place you use).  For PSU I'm using Dell Z750P units (http://www.ebay.com/itm/OEM-Dell-PowerEdge-2950-Z750P-00-RX833-0RX833-7001072-Y000-Server-Power-Supply-/251533148025?pt=PCA_UPS&hash=item3a908b3f79) coupled with a gekkoscience Dell PSU breakout board (i.e. sidehack's breakout board http://www.gekkoscience.com/products/D750_supply_breakout_board.html).  Right now I have a couple of those pulling between 920W and 950W at the wall.  From that you can tell that over committing the PSU is WAY possible *without* much chance of the magic smoke coming out.  On another note, does anyone know if the HashFast Minepeon image work as the miner for these boards?  Hope this helps.

H@shKraker

Go with the h100i rather than the h100 - better pump and apparently cools much better.

For thermal paste I highly recommend going with a 100% metal option, like Coollaboratories Liquid Ultra

Power supply I'd suggest 950w+

[nexus99]

Any reason to not just go all out and use the H110?

[ssateneth]

Any reason to not just go all out and use the H110?

"going all out" is relative. Instead of using some closed loop system, why not make your own? I honestly think a 2x120mm radiator (let alone 1x120mm) is far too small for such a huge load such as the hashfast chip (600W or more). The included fans likely don't have very good air pressure either.

[Collider]

You can always go for the bigger radiator and fan upgrade, you should be able to reach even more cooling capacity.
(Fan upgrade shoud be mandatory as "silent" fans are built into these)

[nexus99]

You can always go for the bigger radiator and fan upgrade, you should be able to reach even more cooling capacity.
(Fan upgrade shoud be mandatory as "silent" fans are built into these)

I wonder about the cost. The boards are already 1100 alone. Tack on PSU and expensive cooling and things start getting iffy. Its fun... but I do want it to at least pay for itself.

[nexus99]

I hope that everyone posts up cool photos of their franken-cooling systems on these boards! That will be cool to see!

[MrTeal]

Any reason to not just go all out and use the H110?

"going all out" is relative. Instead of using some closed loop system, why not make your own? I honestly think a 2x120mm radiator (let alone 1x120mm) is far too small for such a huge load such as the hashfast chip (600W or more). The included fans likely don't have very good air pressure either.

The fans are actually a bigger issue than the radiator, to be honest. Most aren't designed to push a lot of air through a constricted spaced. While I was down there we were able to run one of the production Habaneros up to 925MHz with a non-ideal clamping and no backplate (they hadn't come in yet) using an H80i, but it had a high flow 38mm San Ace fan on it. It performs much better like that than a double radiator like the Swiftech H220, Antec Kuhler H20 or Coolermaster Nepton 280L with stock fans.

[MrTeal]

So options: 1) VMC can't follow the blueprints for the evo board, 2) There is a high % of boards that is limited in his speed in the VMC process or 3) the evo board itself sucks.

I must admit that I'm undecided.

Personally I think it's impractical for anyone but the most hardcore tech-head to be able to remove the amount of heat coming from these chips. I defo believe the peppermining board is a better design and their software will allow folks to get a lot more out of the chips, but IMHO the price is a little steep relatively speaking considering the plausible additional hashrate average joe could achieve.

That said, from the specs I've seen posted by MrTeal and Gateway I get the feeling the w/gh will be better from the habanero, although $250 worth of improvement? I'm not sure....

I've never actually seen any efficiency numbers posted for the Evo, actually. I'd be interested if you have any, especially board level ones and ideally with the cooling not plugged into the board since it can be so variable in power usage.

[nexus99]

You could take a  Corsair H110 and replace the fans with San Ace 140mmx38mm. That's like 120 bucks in fans though. So maybe 250 bucks for that cooling solution.

The H100i uses dual 120mm fans. The San Ace replacements in that size... for about 30 bucks per you can get 224 CFM (compared to 77 CFM on the stock fans).  So 200 all in?

Maybe the single fan solution with the H80i will be more than enough though. Maybe 150 bucks?

[sidehack]

I just got a car radiator and 12V fan in from eBay, total about $75, that is going on a 3KW dummy load. Should be twice the cooling I need. Just saying, jerryrig is probably not a bad idea if you're looking to go big. As for PSU, if these'll work fine with my D750 setups, it's around $90/KW including wiring.

[MrTeal]

You could take a  Corsair H110 and replace the fans with San Ace 140mmx38mm. That's like 120 bucks in fans though. So maybe 250 bucks for that cooling solution.

The H100i uses dual 120mm fans. The San Ace replacements in that size... for about 30 bucks per you can get 224 CFM (compared to 77 CFM on the stock fans).  So 200 all in?

Maybe the single fan solution with the H80i will be more than enough though. Maybe 150 bucks?

I haven't done sufficient testing with different coolers, but my gut and some experience tells me that it is better to go the double radiator route since they don't cost much more than a single wide radiator.
Another note is that it is measurably better to have the fans pulling air through the radiator as opposed to pushing it through, just swapping the direction can drop temps by a couple degrees.

Also, the rated CFM on a fan can be deceptive, even with really good brands. Take a look at these Delta ones.
http://www.delta-americas.com/products/FanUploads/Specification/QFR1212GHE-SP01%28REV01%29.pdf
http://www.delta-america.com/Products/FANUploads/Specification/AFB1212GHE-CF00%28REV00%29.pdf

The first one has a little bit higher pressure and lower CFM ratings than the second one. If you look at the graphs towards the end though, you'll see the second fan has a huge drop in airflow once you get past 0.45 inches of water on the graph, while the first one is nice and linear. Into a radiator, the first fan would probably work much better even though it's 210CFM instead of 241CFM.


I can say I really like the Nepton 280L. I really hate the Antec Kuhler H20 1250.