2015-4 Bitcoin mining Antminer S5 Rebuilt

Bitmain posting P62 Antminer S5

replacing the stock fan with a single Noctua ($24.5 on Amazon) makes it much less loud and changes the metallic banging sound of the stock fan to whooosh, although temperatures rise to ~60C and you have to hash at 325 mhz(1075 GH). I am waiting for a second fan to add pull and go back to 350mhz or even higher.
http://www.amazon.com/Bearing-NF-F12-iPPC-3000-PWM/dp/B00KFCRATC

Here's my experience with the 2 S5's (batch 2) I received yesterday.  Got it unpacked and hooked up and turned on I thought "Oh, hell no!"  No way those fans can make this a home miner unless you're talking about keeping them in the Silence of the Lambs basement.  Switched to the Silverstone 141 fans on performance mode (1,920RPM is a loud woosh over the scream of the OEM fan) and put them in the back in a pull setup.  Turned on and they quickly shot up to 79 degrees Celsius, tried at 312.5M and they stayed at 79.  Turned them off and moved the fans to the front (fits fine if you use a bootless network cable) in a push setup, turned them on and they started going up past 70 again, so set the miners at 312.5M and waited.  They settled at 70-74 degrees C according to GUI, in a room that's about 75-80 degree F with 0 HW errors.  I can handle that, each is hashing about (1,025 GH/s avg.) that's about what my C1 did (1,005 GH/s avg.).  Need to get some readings with the Kill-A-Watt today to see how much power it's drawing at 2 x 312.5M.

I bought the Delta AFB1212SHE units in bulk. Also have the Noctura Fans but will test and send back if the Deltas cut it. 

找風扇VIPER R，或14cm風扇12cm mount...，不難找的.

http://item.taobao.com/item.htm?spm=a1z09.5.0.0.d4ubEm&id=17260135350