Quote from: chromosoma on January 24, 2014, 06:08:08 AM

Quote from: twindragon6 on January 24, 2014, 12:07:58 AM

These help on the back of the chips. Also where did you solder the cap? It's hard to make out in the image.

http://www.frozencpu.com/products/14952/vid-178/ModMyToys_Solid_Copper_Passive_Micro-Heatsink_-_8mm_x_8mm_x_8mm_Pack_of_4_-_Nickel_Plated-MMT-HS-8X8-CU-NK.html

The capacitor is soldered between GND and +5V

Ahh, thanks! I was looking at the schematic for the aoz1021 and it looks like there are two 22µF caps on the board. One on the input side and another on the output. I'll have to see if I have some caps laying around. Putting one inline like that should stabilize the power from the usb. I'm getting a stable 2.0 Gh/s with the stock resistor. I grabbed an old P4 heatsink and a 12V 500mAh transformer and wired it up to the fan to setup active cooling, then mounted the Antminer to the CPU side with some thermal tape. I should be able to mount four of them onto the sink. I can run at 2.2Gh/s right now but the clock fluctuates wildly. No hardware errors in Bfgminer 3.10.0 though. The temp is good at 32.23°C/90°F (20°C/68°F ambient) measured at the hottest point which is the edge of Antminer sink where the thermal pad is. That's a 50Mhz overclock above the stock 200Mhz just buy adding cooling which isn't too shabby. At this point it needs more voltage and a capacitor. I'm going to just add the 10K resistor and cap first which should give 0.88V and see how hard I can push it then I'm going to swap out the 1K for a 2.49K and go for the full volt. I think less voltage is more in this case. Voltage=Heat and Heat=Bad. It looks like 4.0Gh/s will require some LN2. That's a 250% Overclock at 500Mhz and as such is unrealistic.

http://i1211.photobucket.com/albums/cc431/twindragon6/DSCF7357_zpsc964b66e.jpg