Question 1

Ok ima noon. What's the mini usb used for. I read about it doing something woth power usage. Is that what it is for?

Accepted Answer

The mini usb is for corsair link. It comes with a mini usb to usb header. With the corsair link software you can pull additional info about the psu. Not required but it can be useful.

Question 2

I'm considering this as a separate power supply for GPUs. Can I simply plug only the necessary cables, or do I still need to 'jump' the motherboard connection to get it to power up?

Accepted Answer

I would suggest you not use a power supply just for a gpu.
It needs the MB connected to respond to power demand so yes you would have to "jump" it to make it power on.
But again I highly suggest you not do this. 
I am a computer systems engineer.

Question 3

physical dimensions?

Accepted Answer

150mm x 86mm x 150mm

Question 4

is it crossfire ready?

Accepted Answer

No psu is "crossfire ready" or "sli ready". It either has enough Watts to power your system or it doesn't. 
You need to add up your system requirements and judge that way. For example if your cpu uses ~120W and  you have 3 graphics cards each pulling 200W. So (200×3) + 120 = 720W. You would be fine this is a 850W psu.

Question 5

Will this be enough juice for dual Xeon E5-4627v2 3.3Ghz , 128GB Ram and 8 2.5'' 1 TB SAS drives?

Accepted Answer

you can go to websites to calculate power needs. Just build a mock system of parts you are using and then check power requirements. E.G. "PCpartpicker"

Question 6

is this enough for crossfire fury x and 6700k ?

Accepted Answer

Fury Load power consumption on Furmark (and other benchmarks) is around 400 watts. Cross fire will make it 800. Though real world scenarios will be lesser than that.

This PSU might work for crossfire Fury X, but i will personally suggest getting a 1000W psu for high end SLI/Crossfire rigs.

Question 7

what is the length of this? the Maximum PSU Length im looking for is – 180mm is this more then that ?

Accepted Answer

Hey Miguel.... sry about that.  I'm a bit dyslexic and got it scrambled.  I agree with you, psu's can be so bloody big.  I have a 1000 watt corsair, which is large, and I was afraid the HX850 would be big too. I can't give it to you in mm, but the hx850 is 3.5" x 6".

The XH850 has a usb2 connection for monitoring the psu usage.  I had to buy two extra usb headers because my mobo came with only 1 usb2 header.

Question 8

I don't have the cables that come with the set.... does anyone know where I can find a compatible cable for this hx850i ?  I tried buying some but they're not fitting into the modular slots. Its heavily stalling the completion of my cpu. PLEASE HELPP

Accepted Answer

I would contact Corsair directly.

Question 9

Does the HX860i support SLI?

Accepted Answer

Absolutely, or quad.... whatev you can afford.  Of course, you have to have the bridge between the two cards, and set up the sli in the geforce experience so your puter recognizes both gpus

Question 10

Please list the physical measurements of the actual power supply itself, the write up does not list them.  Will this power supply properly fit within the Cooler Master HAF XB EVO case?

Accepted Answer

According to Corsairs website the Dimension are 150mm x 86mm x 180mm

Brand	CORSAIR
Series	HXi Series
Model	CP-9020073-NA

Type	ATX12V / EPS12V
Maximum Power	850 W
Fans	1 x 140mm Thermally Controlled Fluid Dynamic Bearing Fan
PFC	Active
Main Connector	20+4Pin
+12V Rails	Single or 7
PCI-Express Connector	6 x 6+2-Pin
SATA Power Connector	12
SLI	SLI Ready
Haswell Support	Yes
CrossFire	CrossFire Ready
Max PSU Length	180 mm
Modular	Full Modular
Efficiency	92%
Energy-Efficient	80 PLUS PLATINUM Certified
Over Voltage Protection	Yes
Input Voltage	100 - 240 V
Input Frequency Range	47 - 63 Hz
Input Current	12 - 6 A
Output	Single +12V Rail Mode: +3.3V@25A, +5V@25A, [email protected], [email protected], +5VSB@3A Multiple +12V Rail Mode: +3.3V@25A, +5V@25A, +12V1@40A, +12V2@40A, -12V3@40A, +12V4@40A, +12V5@40A, +12V6@40A, +12V7@40A, [email protected], +5VSB@3A
Approvals	FCC, ICES, CE, UL / CUL, CSA, C-Tick / RCM, TUV, CB, CU, KC Mark, RoHS, WEEE, RoHS (China), REACH.
Connectors	1 x ATX Connector 2 x EPS Connector 2 x Floppy Connector 12 x 4-Pin Peripheral Connector 6 x PCI-E Connector 12 x SATA Connector

Dimensions	3.39" x 5.91" x 7.09"
Weight	7.44 lbs.

CORSAIR HXi Series HX850i 850W 80 PLUS PLATINUM Haswell Ready Full Modular ATX12V & EPS12V SLI and Crossfire Ready Power Supply with C-Link Monitoring and Control

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Item#: N82E16817139083