I love Dave's gear, but I have to make sound financial decisions (is there such a thing in BTC mining?), picked up some Antminer gear.

welcome to 900m diff now

V1.2 cards. I want 3-5 card for myself, and will happily reship within canada or to USA via xpresspost (2-3 day service) if anyone wants to go on the purchase with me.

I would do up to 4 if this is going to be done in the next couple days.

There was a person in this post that got it working on V3 and had a nice write-up on how he did it, I am a bit too lazy to dig it up but it was in Mid November when he posted. You may be more willing to dig back a few pages in this post than I

Did this arrangement fall through? I haven't heard back from you.

That was me.  The post is here; getting bfgminer running was pretty straightforward.  It needs to run as root to talk to the Bitfury hardware, but so does chainminer.  Action shot:



I have a couple of BFL Jalapeños and a Klondike 16 (finally arrived this week) hanging off it now; with two v3 H-boards, I'm getting a total of about 85 GH/s.  Also arriving this week: one of these open-frame cases.  Here's what the whole rig looks like now:



All of the miners run off the power supply in the Bitfury rig; the Klondike miner pulls from a modular Molex cable, while the Jalapeños pull from the ATX cable through a modified ATX extender (pulling 12V from the appropriate pins and hard-wiring PS_ON to GND).  At some point, I'd like to run the USB hub from the power supply (tapping 5V off of the ATX extender would work) to clean up the wiring a little more; it'd eliminate a wall-wart.  If I can move the rig closer to a network jack, I can get rid of the wireless bridge (I'd probably put it back on its previous duty as an 802.11a/n access point).

The biggest problems are Cooling and the Wobble caused by the cooling. You also really need the Heatsinks on the regulators.

Spotswood's Case Really Helps, stabalizes the Cards as well as allows you to get the fans right on the cards. Make sure to get high CFM fans as well.

Here are some numbers you can achieve with good cooling.

speed:13745 noncerate[GH/s]:619.377 (2.419/chip) hashrate[GH/s]:629.803 good:43263 errors:802 spi-err:7 miso-err:0 duplicates:86 jobs:262 cores:98% good:256 bad:0 off:0 (best[GH/s]:629.342) Fri Dec 13 20:09:26 2013
board-2 speed   nrate   hrate   good    errors  spi-err miso-er duplic  good    bad     off     per chip        good cores
0:      840     38.469  37.596  2687    13      1       0       0       16      0       0       (2.404/chip)    100%
1:      864     39.041  40.080  2727    27      0       0       3       16      0       0       (2.440/chip)    99%
2:      864     39.528  39.869  2761    17      2       0       3       16      0       0       (2.471/chip)    99%
3:      862     37.996  40.017  2654    68      0       0       4       16      0       0       (2.375/chip)    96%
4:      864     41.232  40.186  2880    16      0       0       8       16      0       0       (2.577/chip)    99%
5:      862     39.872  40.492  2785    72      0       0       9       16      0       0       (2.492/chip)    97%
6:      862     37.839  39.858  2643    97      0       0       10      16      0       0       (2.365/chip)    97%
7:      864     37.796  39.604  2640    17      1       0       5       16      0       0       (2.362/chip)    99%
8:      864     38.340  39.530  2678    24      0       0       6       16      0       0       (2.396/chip)    100%
9:      864     40.559  40.926  2833    11      1       0       8       16      0       0       (2.535/chip)    100%
A:      862     39.814  38.833  2781    59      0       0       4       16      0       0       (2.488/chip)    97%
B:      862     40.645  40.915  2839    23      0       0       9       16      0       0       (2.540/chip)    99%
C:      864     39.929  40.017  2789    70      1       0       2       16      0       0       (2.496/chip)    98%
D:      831     34.789  34.404  2430    42      0       0       0       16      0       0       (2.174/chip)    96%
E:      858     37.710  38.991  2634    52      0       0       7       16      0       0       (2.357/chip)    96%
F:      858     35.820  38.484  2502    194     1       0       8       16      0       0       (2.239/chip)    91%

Pictures of The case and fans below, the Box fan draws the air away from the Unit and I most likely do not need it anymore. I have all the trim pots turned slighty down since they were set a tad to high.

 Thank you for your anecdote. I thought I was going crazy there myself for a while, discovering this same behavior.