I took a couple of images of my ZTEX 1.15x. The images were taken with FLIR Systems InfraCam.
The ZTEX-board in question had an extra heat sink in the bottom and bit more powerful non-stock fan; SUNON MB40201V2-0000-A99 running at 12V. Board had been mining for a couple of hours with 1.26V on V_CCINT. Ambient temperature was about 23°C, air-conditioned room.

There is really no point in this, I just wanted to see how hot the board was running and I thought to share these.


Non-IR images of the board are available for example on the ZTEX homepage.

The component radiating the most heat (about 70°C) is MOSFET IRF8714PbF next to the buck regulator AOZ1025D. The MOSFET is rated -55°C to +150°C so it should be fine, but on a long run it might be a good idea to perhaps use a small heat sink for the sake of the other components next to the MOSFET...

What voltages have you guys ended up using on long term? Have you experienced any hardware failures or performance degradation?

Xilinx suggests (in the Spartan-6 FPGA Data Sheet: DC and Switching Characteristics -document) using 1.14-1.26V for V_CCINT and lists the 1.32V as absolute maximum.
I suspect that 1.26V would probably be the safest maximum for long-term use, but I would love to hear more about your experiences.

Hello!

I'm requesting to be whitelisted, because I'm using Ztex boards for mining and I would like to make a query about the voltages people actually ended using on long term in this topic: https://bitcointalk.org/index.php?topic=90370.0
I would also like to share some cool images of my Ztex, taken with a FLIR camera. Here is a sample


Best regards,
Andows