No 400Mhz will not burn out the board unless the components are out of spec but greater than that starts to push the VRM's and that could cause one to occur.

I run ant's at 400Mhz @ 50c in 23c ambient @2200-2500 rpm on a single fan. As spring turns to summer I will drop to 375Mhz or add cheap 130CFM fans, by the summer and assuming that the difficulty has not increased to make them unprofitable I will drop to 350MHz or below and add cheap 130CFM fans.

They are very similar figures to the ones I have using a Cooler Master 1050w @ 230v.

On newer PSU's the limit when overclocked seems to be 400W. So whilst a 450W 80PLUS would just do the job for an overclocked ant it will not last long, a 500W or better would be needed.



As and aside, I was pulling 450W at the wall on stock clocks on a very old PSU that frankly I should have put that in the bin ages ago.

It has same effect and as much use as you just driving your car in first gear so you can see the RPM counter near the red.  It would be a great way to help burn out you fan faster.

Ant's are happy at 50c and below, the fan is set to work hardest at 60c and the unit shuts down at 70c.

Wedel, the advice above is good but also remember that virtual currency mining is an arms race. To keep mining at £100 a day profit you need to also factor in buying new equipment as part of the costs to keep up with the difficulty increases, that greatly increases the amount of money you need to begin with.

Start simple and cheap to understand mining before you throw cash at it. Get a AMD 7950 graphics card or better and mine alternative currencies for a couple of weeks to understand just what it is about. If you don't like it you have something of value to sell, if you do like it then you can empty your savings account.

Windows Start Button and enter CMD in the search programs and files box, press return or click on the CMD program icon after the search is complete. You will get a CMD box with a black background  and in white a C:\Users\your-user-name> prompt.

Open Windows Explorer and file the folder with the cgminer program in it so that you can see the program in the right hand side. Click the white space to the right of the folder name in the folder address box right at the top of Windows Explorer, the name of the folder will have changed slightly and will being with a C:\. Copy the whole of the string using cut and paste commands into the CMD box by copying the string from Windows Explorer by selecting it to turn it blue and then right clicking the selected string and left clicking copy in the drop down menu. Type the letters CD followed by space into the CMD box and then right click the CMD box background and left click paste in the drop down box. It should look like this before you press the next return key but with your username instead of mine
 

Left click inside the CMD box and press the return key, then you should get a new prompt that will be similar to C:\Users\ian\Desktop\cgminer> in white. Then enter cgminer -n and press the return key

First the script /etc/init.d/cgminer does not allow the use of any --api-* cgminer options except for api-allow so you have to use port 4028 or re-write the /etc/init.d/cgminer script

I am assuming that you do not want to re-write the script and the IP 89.212.242.33 is not your network but some service on the Internet.

You will need to either setup your monitoring software to use port 4028 and forward incoming connections on that port to or set up your router to port forward 7777 to your ant miner on port 4028. The 'how to' do this is dependent on your router model and should be in its documentation. You will have to know if your router does port forwarding via NAT or just plain port forwarding for the next steps.

For NAT: Assuming the network your ant is on is either 192.168.1.0/24 or 192.168.2.0/24 and then change the antminer cgminer config to option api_allow 'P:192.168.*.*,W:127.0.0.1' and remove the api-groups and api-port lines.

For Plain Port Forwarding: Change the antminer cgminer config to option api_allow 'P:89.212.242.33,W:127.0.0.1' and remove the api-groups and api-port lines. In the antminer web gui go to the Network -> Firewall -> Traffic Rules and click the Edit button on the cgminer rule. Select the 'Any zone' radio button and click save and apply.

Now reboot your ant and test.

You do not say if the riser is plugged into a PCIe x1 or x16 slot but it is most likely a bad powered riser that has solder creating a short from the first two pins which are +12v to either the third (which is unused on x1) or the fourth which is -12v. Clean the pins and plug the card into a good motherboard to see if the card has survived.

It is unlikely that the motherboard has been damaged as cables that could feed power back should have been cut but do a visual check of the PCIe connector and components to see if there is any damage.

Hmmmm...I have just checked all my ant's, I have at least 1 from each batch and they all report "memory: 04000000" regardless of the build date on the boards. I suspect you have a bad wrt module

You need to change the firewall rules to suit as well.

Right hand side of the first line in the kernel log tab is the firmware release date

[    0.000000] Linux version 3.10.12 (xxl@ubuntu) (gcc version 4.6.4 (OpenWrt/Linaro GCC 4.6-2013.05 r38031) ) #10 Thu Dec 26 09:03:53 CST 2013

They are later versions of the fans, they do not start turning until the miner starts hashing and the chips warm up.

Ignore them it is just a display bug.

There are two types of thermal paste or grease, electrically non-conductive thermal grease that includes silicone and zinc or electrically conductive that includes silver, copper, and aluminium. Bitmain uses a non-conductive thermal grease, you do not need to even need to remove it, it just looks prettier if you do 

Oh if but that was only true, perhaps yours are not up long enough or my piece of string to the Internet is just too slow 

Some of my ant's do not have any DiffS but some do when you leave them running

You are missing the DiffS giletto, the little buggers sneak in slowly over days whilst your back is turned 

HW / (HW + DiffA + DiffR + DiffS) = %

Heat soak on electronics normally works the other way, the device is run over temperature for an extended period to ensure heat induced breakdown of electrolytic material in a capacitor, the corrosive effect of any contaminants, the deterioration of plastics, the oxidation of contacts, joints and solders does not occur.

Just powering them off is good enough.

You do not need to reboot on seeing an 'x', it is a display bug, just watch the share rate on the pool of your choice.

What are your full stats?

The calculation is HW / (HW + + DiffA + DiffR + DiffS) = % not just accepted

Add an image of your complete stats to the thread and tell us what PSU you are using and how it is connected e.g. molex, 2 x PCI-e from different cables, etc

I have one that doesn't flash green but check the number of asic's on the status page & check the GH/s because if it is like mine it will still be hashing.