Summary: It's so close to being flawless. I bought an ocz z850 that started making loud coil whine... This psu mostly solved that problem as there is still some whine, just much less. The corsair link software leaves ALOT to be desired. Also it'd be nice if all my USB headers weren't taken by corsair link as I already have an h100i. That said when the software does work it's quite nice. It tells my current wattage and allows me to setup multi-rail modes.
Summary: I never go to over 800 Watts with my system. If you run a similar system or less, def stick with the AX860i, much better deal for what you need and what you get. I only got a 1200 because I plan to run my next setup from this PSU which will include a high power water pump, a few more fans, a couple more drives and some extra usb peripherals.
Pros: Always runs 93% efficient and up. I have an overclocked 920 u 3.8, 200 blck, and 2x gtx 680 lightnings with all the usual hardware. The Fan never turns on, even when stress testing to the max. Never runs above 50 Degrees C Max. Really cool to get a real time monitor of how much power is being drawn from the socket and how much is being converted to usable power to the system, as well
Cons: If the fan is turned on manually above 40 Degrees, its a bit loud...though I see no reason to do so. Initial software setup was a bit annoying since the application first had a hard time detecting the Link Dongle. After a few restarts and software setup though everything runs silky. Last CON is that although the cables are protected with a very dense wire cover, they seem a bit cheap. My cables fro my recently blown (5 year old) thermaltake 1200W had very nice shieldi...
Looks good. Seems to work fine. I do however get alerts that the powersupply has droppped below the threshold..
Epic Data Recovery Labs, Amazon
30 April 2013
Summary: Make sure to wire it up before installing it. Trying to figure out what port you plug the cables to may be difficult depending on the visibility after installation. Make sure you plugged in the right cable in the right port before you plug power to devices. You can and will kill your drives/card if you make that mistake. The rest of it is just fine. Far better than others I've seen. Very expensive if you ask me. But what can you do? Gotta buy something that is solid.
Summary: SATA and 8-pin are too short for my 800D, so a word of caution to anyone planning to use this PSU in a full tower case, where as the 24-pin is quite long... Got an RMA for my first 1200i for severe coil-whine, replacement has some intermittent coil-whine, but I wont be bothered to replace this PSU a second time. Some videos on Youtube and posts on Toms seem to suggest that this is not an uncommon problem.
Pros: Efficient, all black cables, quiet, clean power
Summary: I've had this PSU for a couple months, and so far, so good. It's much more than adequate for any home machine, and it looks/feels very sturdy and well built. The only issue is that the software which is a primary component of the unit is not Windows 8 compatible. In raising this with Corsair, they do not have an ETA on Win 8 compatible software. This is a little disappointing, given how long Win 8 has been available to developers.
Summary: I love the separate cables and the 2 CPU connectors worked really well with my advanced motherboard. There is a USB connector which causes it not to work when connected so not sure of the point of it but it works fine without.
Summary: I have the AX1200 not AX1200i, but both PSU share the same cooling fan, a Yateloon 140mm cooling. This fan is a simple ball bearing fan, running around 1700 RPM. All the sound you hear, coming out the PSU, is made by this fan. I recently ripped it out and replaced with a Akasa AK-FN063 14cm Viper High Performance S-Flow Fan , now myself build is running near silent, apart from some air noise. I agree it's a great PSU, let down by awful cheap Chinese made fan.