Corsair warranty goes by serial number, rather than any receipts - like almost every computer component company. While officially it has to be from an authorized retailer, in practice second-hand Corsair items and refurbs will be fully covered under warranty.
As for the 1 year warranty, again, Corsair does not ask for a receipt so you will be covered. They are also known as some of the best support in the industry, so it'd be extremely unlikely they'd reject your RMA because it's a day over a year, much less it's a year over a year.
I've RMA'd components from basically every single computer company, Corsair stands as one of the best in terms of support, though pretty much every company except NZXT is completely painless, and only a few companies are strict about requiring an official proof of purchase (of the few companies that actually insist on proof of purchase, most of them will accept an Ebay invoice or a forum PM from a forum trade). The less than a handful of companies that insist on an official proof of purchase have a reputation for being quite strict, like OCZ and EVGA. Or only OCZ and EVGA, really (however EVGA is known for some above and beyond provided you have an official receipt).
As to how Corsair's support is so amazing when almost every company will honor used RMAs and do it painlessly, etc, is that they'll often:
* Pay for shipping (have to talk to them, of course)
* Quick response on questions and support tickets
* Faster than average RMA turn-around (less than a month, usually an extremely fast 2-3 weeks)
* Additional Service Options like Advanced RMAs and Cross-shipping (take your credit card info, sends you replacement immediately and gives a generous time frame to expect your unit before charging, or charges and then refunds upon original item arrival).
* Often will upgrade your unit (ie 2nd RMA in a month for same model PSU, offers free upgrade to avoid future issues)
* Often no questions asked about reason for RMA
* Will pay-out on insurance claims from leaking closed loops (multiple $1000+ rigs have been fully covered after leaks with no problem, never heard of a rejection).
Many companies offer some of these, but Corsair is one of the few that does all of this. Most companies will do used/secondhand RMAs with no receipt, respond quickly, RMA done within a month, but very few do all of this, like Advanced RMAs or service in 2 weeks. NZXT has a reputation for awful service, MSI's support is hit or miss and often will charge for the RMA and needs a good reason, but otherwise pretty much every single company out there is awesome, with the exception of low-brands like Powercolor or Apevia, of course.
You can see my list of Companies by RMA and Support here: http://www.overclock.net/t/1371138/belials-comprehensive-list-of-companies-by-rma-support/0_100
Finally, let me remind everyone that leaking closed loops is definitely a thing of the past, ie Asetek Gen1 and Coolit Eco 1 days (ie Kuhler 620, H40, Asetek LCLCs). Even outdated, old gen closed loops like the H50 and H100, which did leak from time to time, weren't common. Nowadays, with 4th gen Aseteks and 2nd gen Coolit's, leaks are pretty much unheard of. And if it does happen, you can usually expect complete reimbursement of damaged parts.TLDR: Yes, buy that refurb'd Corsair unit with the full confidence you will have support should something happen
. Unofficially, of course, but speaking from experience of RMAing a good 50+ components, many from Corsair too.
ps: pre-sleeved kits always look pretty.. crappy, using regular sleeving. Go with heatshrinkless paracord, much better (ensourced@ebay will do all 4 main cables for ~$40, or do it yourself for ~$25 for parts for a single color, that's not including additional colors or tools like wire-stripper, atx pin tool, not to mention it takes about a week of labor for non-professional sleever). Or even MPDC, plenty of artisans on ebay and OCN that are great and do it for dirt cheap.
sorry for poor pics:Edited by Belial - 11/25/13 at 9:36pm