Hyper-Threading Technology // Intel Technology Journal Volume 06 Issue 01 (February 14, 2002), ISSN 1535766X p.7 « This implementation of Hyper-Threading Technology added less than 5 % to the relative chip size and maximum power requirements»
Hyper-Threading Technology // Intel Technology Journal Volume 06 Issue 01 (February 14, 2002), ISSN 1535766X p.14: "Measured performance on the Intel Xeon processor MP with Hyper-Threading Technology shows performance gains of up to 30 % on common server application benchmarks for this technology. "