I actually replaced the power supplies on two of mine as well, very similarly to yours. I used the EVGA 1300's, but they're the same size as the AX1200i, so same deal basically. The power draw at 1200 for the A2 Mega is about 1060w at 110v using the EVGA, so if you use the normal logic of 80% utilization, then 1200w or more would be ideal. I've got a bunch of A2's, and I've seen probably 3 different power supplies - one with a bitcoin logo on it, one that has "Game" in the name (don't remember the rest), and one that is completely black with no markings. Some are listed as 1100w, some 1000w, and some 1300w, but to be honest I think the only difference is the silk screening on them, I would put very little faith in them.
The 6-pin PCIe connectors on your blades indicate that it's one of the newer A2 Mega's (like the ones I got from Zoomhash). The older have an 8-pin PCIe connector - but once again in classic form, some of the power connectors on the stock machines have 6-pin connectors plugged in, so basically not using 2 of the pins, so they must just be bridging all the power together on the board or something similar.
The EVGA works fine with the case, you don't need to bend the corner when screwing it in, which is nice.
On the power breakout on the A2, there appears to be two mounting options - the newer one is like yours, where it mounts to the top (side?) of the case and it's a tight fit with the larger PSU. With the older units, their power breakout sits on a metal bracket that docks onto the first blade - this actually makes for an even tighter fit and using the power supply even more difficult.
In terms of operation of the unit - mine wouldn't run at 1200Mhz on 110v (worked fine at 240v) with the stock power supply, but it works fine with the EVGA. So is it worth replacing? I'll probably replace mine all with PC PSU's as they fail, but if it works, then wouldn't bother. I will say that the machine runs infinitely happier on 240v than 110v with the stock power supplies, so if it's an option, then definitely do it.
Personally I like the A2's, I think they're a great scrypt miner, although my experience with any other scrypt ones is zero (I primarily do BTC). If you haven't checked out my custom A2 image, then you definitely should, as it adds some nice features to the unit:
https://bitcointalksearch.org/topic/custom-innosilicon-a2-terminator-image-anx-edition-1141802
Topic: My A2 Mega Terminator AX1200i Power Supply Transplant - page 2. (Read 3723 times)
Hey, just wondering if the power supply fixed your problem. Im having a similar problem because my machine runs for about 10 minutes then shuts the fans down. Thanks
Reserved...misc...future plans...plug the built-in monitoring capabilities of the AX1200i (CorsairLink) into the Pi?
Power results with the AX1200i:
I keep it running at 1100 freq. That is already over the 80% rule and I would be uncomfortable running at 1200 freq since that is pushing the AX1200i to its max rating. Thoughts?
The surprising part is that the Mh/W and W/Mh both get better as I get closer to the power supplies max rating?
I keep it running at 1100 freq. That is already over the 80% rule and I would be uncomfortable running at 1200 freq since that is pushing the AX1200i to its max rating. Thoughts?
The surprising part is that the Mh/W and W/Mh both get better as I get closer to the power supplies max rating?
(sorry for the size of the pictures)
Previous projects:
My Custom Case Build
My Custom Gridseed Case Build
Proud owner of a new A2 Mega Terminator (110 Mh/s). As with all my stuff I bought it just for fun and am not interested in ROI. I have an older A2 Terminator that runs well other than it occasionally turns off on its own. I suspect the power supply.
My new A2 Mega Terminator started right up and would mine as advertised for about 10 minutes and then turn off. The Pi controller would still be running but all the blades would shut down. After speaking to Innosilicon support we discovered that the power supply was the culprit. It would run great with 5 out of the 6 blades attached but with the 6th one it would turn off after about 10 minutes. Most likely due to it drawing more power than it could consistently provide.
This was my first direct experience with Innosilicon and I do have to say they were pleasant and professional to deal with. It can be difficult due to the time and language barrier but they did their best to ensure I was a satisfied customer.
After we determined it was the power supply they sourced a new vendor/model and shipped me a replacement. This took about a week to accomplish and during the wait I decided to use one of the AX1200i power supplies from my old GPU rig since I had just recently (finally) shut it down for good. Is this overkill? Most definitely. I would not go out and purchase one for use in an A2 Mega Terminator but since it was literally laying around with no plans for use and I wanted to start mining I decided to go for it.
If you are familiar with the AX1200i you know it is a rather long power supply but it fit! (barely)
For reference here is a picture of what it looked like with the stock power supply. Note that this power supply has exactly six Eight-Pin +12 V CPU Power Connectors with cable lengths perfectly spaced for the location of the blades. In order to use them with the blades which have standard 6 pin PCIe connectors they had to reverse the direction and FORCE them in to fit!
(the replacement power supply I eventually received from Innosilicon had the appropriate PCIe connectors)
First thing I had to do was carefully bend the housing to accommodate the different power plug location. I suppose I could have cut it off but it was easy enough just to bend it with pliers.
I tried to capture exactly how close the AX1200i fit inside the case. There is about 2-3mm of space. Barely enough to plug in the PCIe cables but it fit!
All done...not sure it looks much better but in the next post I will document how efficient it runs.
To be continued....
Previous projects:
My Custom Case Build
My Custom Gridseed Case Build
Proud owner of a new A2 Mega Terminator (110 Mh/s). As with all my stuff I bought it just for fun and am not interested in ROI. I have an older A2 Terminator that runs well other than it occasionally turns off on its own. I suspect the power supply.
My new A2 Mega Terminator started right up and would mine as advertised for about 10 minutes and then turn off. The Pi controller would still be running but all the blades would shut down. After speaking to Innosilicon support we discovered that the power supply was the culprit. It would run great with 5 out of the 6 blades attached but with the 6th one it would turn off after about 10 minutes. Most likely due to it drawing more power than it could consistently provide.
This was my first direct experience with Innosilicon and I do have to say they were pleasant and professional to deal with. It can be difficult due to the time and language barrier but they did their best to ensure I was a satisfied customer.
After we determined it was the power supply they sourced a new vendor/model and shipped me a replacement. This took about a week to accomplish and during the wait I decided to use one of the AX1200i power supplies from my old GPU rig since I had just recently (finally) shut it down for good. Is this overkill? Most definitely. I would not go out and purchase one for use in an A2 Mega Terminator but since it was literally laying around with no plans for use and I wanted to start mining I decided to go for it.
If you are familiar with the AX1200i you know it is a rather long power supply but it fit! (barely)
For reference here is a picture of what it looked like with the stock power supply. Note that this power supply has exactly six Eight-Pin +12 V CPU Power Connectors with cable lengths perfectly spaced for the location of the blades. In order to use them with the blades which have standard 6 pin PCIe connectors they had to reverse the direction and FORCE them in to fit!
(the replacement power supply I eventually received from Innosilicon had the appropriate PCIe connectors)First thing I had to do was carefully bend the housing to accommodate the different power plug location. I suppose I could have cut it off but it was easy enough just to bend it with pliers.
I tried to capture exactly how close the AX1200i fit inside the case. There is about 2-3mm of space. Barely enough to plug in the PCIe cables but it fit!
All done...not sure it looks much better but in the next post I will document how efficient it runs.
To be continued....
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