Power consumption of my desktop (Feb 2017)

1. CPU + Motherborad (5820K overclock + Asus X99 deluxe +16G DDR4) : maybe about 300W

https://www.bit-tech.net/hardware/2014/09/03/intel-core-i7-5930k-and-core-i7-5820k-revie/8

2. AMD Fury Nano : 약 200W at full load (peak is about 400W)

http://www.tomshardware.com/reviews/amd-radeon-r9-nano,4285-9.html

3. Intel 750 400GB + 1 SSD + 4 HDD : 15*6=about 100W at full load

http://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ssd-750-brief.pdf

4. Corsair H115i : Could be included in above test 1 

5. 140mm fan X 5EA : about 80W

==> If full load, about 700W & peak could be up to 900W.

My PSU is Corsair AX750 - got it in 2011 maybe. Seems need PSU upgrade if keeping overclocking. Ups.

http://www.corsair.com/en/professional-series-gold-ax750-80-plus-gold-certified-fully-modular-power-supply-refurbished

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Corsair candidates (KRW in Korean sites)

http://prod.danawa.com/list/popup/compareProduct.php?productCodes=3243561|3561806|2812500|2793597|1793359

(1) Ax1500i : http://www.corsair.com/en/ax1500i-digital-atx-power-supply-1500-watt-fully-modular-psu-eu

(2) Ax1200i : http://www.corsair.com/en/ax1200i-digital-atx-power-supply-1200-watt-80-plus-platinum-certified-fully-modular-psu-eu

(3) Hx1200i : http://www.corsair.com/en/hxi-series-hx1200i-high-performance-atx-power-supply-1200-watt-80-plus-platinum-certified-psu

(4) Hx1000i : http://www.corsair.com/en/hxi-series-hx1000i-high-performance-atx-power-supply-1000-watt-80-plus-platinum-certified-psu

(5) Rm1000i : http://www.corsair.com/en/rmi-series-rm1000i-1000-watt-80-plus-gold-certified-fully-modular-psu-cn

Regarding the length of power box, 225cm/200cm/180cm (1500/1200/1000).

RM 2Kg, Ax 3Kg, Hx 4kg..

Hx1200i looks good for me if considering all things including price. However, Axi series are purely digital PSU by using DSP. Additionally, the control via Link could be possible. 

Ups. Very difficult to have decision. :-(