Another unit up to 20gh. To minimize heat near the FTDi chip and the FETs I have been placing 5 chips as follows:

2,3,4,7,5 (use the map in the previous pages for locations). 60c temp with stock heat sink and a very warm power supply. Wish I had my darn PCIx cable from BFL....

Otherwise seems to work well. Tomorrow I should be having 4 more chips come in and the water cooler, we'll try for 7 on one jally with water cooling...