from my research they use the same chip (BM1382) in both the s4 and s4+ and the specs are as follows
Chip specs: BM1382

Process Node: 28nm
Package Type: FCQFN-56
Packaged Chip Size: 8mm x 8mm
Number of Cores: 63
Core Voltage: 0.75 V
Core Frequency: 250 MHz
Hash Rate: 15.75 GH/s
Power Consumption: 0.59 J/GH (chip level, and it can be lower to 0.40J/GH by lowering the core voltage)

sources:
https://www.cryptocoinsnews.com/bitmain-antminer-s4-review-2ths-bitcoin-asic-miner-psu-replacement/
 DO NOT POST SESC LINKS

I hope that helps

I am new to bit mining and I have been having a problem getting my miner to connect to my router via Ethernet in order to find the miners IP address and I have already gone through quite a few guides and forums to try to diagnose the problem and fix it. However all have failed to fix or find the problem and it appears to me that the problem is with in the miner. A blue light on the beaglebone lights up, but when I connect the ethernet cable to port neither the yellow or green light come, which makes me think that there is problem with the beaglebone. Any suggestion on what the problem is and how to fix it?