ltron Posted June 19, 2015 Share Posted June 19, 2015 Hi, on the specs page for the HX1000i I see no mention of over-current protection yet the techpowerup review clearly states that the PSU has this protection in multi-rail mode and points out some components that enable this: http://www.techpowerup.com/reviews/Corsair/HX1000i/2.html and http://www.techpowerup.com/reviews/Corsair/HX1000i/4.html is this correct, and if it is, why isn't it mentioned on Corsair's website? Only the AXi and RM(non i) have OCP according to the website. If the above is the case, is the PSU a true multi-rail PSU i.e. there are separate "shunts" (current sensors) for each 12V rail? see: http://www.hardwaresecrets.com/article/Everything-You-Need-to-Know-About-Power-Supply-Protections/905/4 I'm looking to buy this power supply in preference to an EVGA P2 due to superior acoustics among other features and true OCP would be a nice optional feature to have. Link to comment Share on other sites More sharing options...
SpDFrek Posted June 25, 2015 Share Posted June 25, 2015 The HXi series and the new RMi series are multi rail on the 12v by default. They have 40 amp OCP set point for the multiple 12v rails. When that is turned off it does not remove the OCP completely it just combines it into one massive 12v rail when it comes to OCP. Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted June 25, 2015 Corsair Employee Share Posted June 25, 2015 What he said. Sounds like you might want to read up on how "multiple +12V rails" actually works: http://www.jonnyguru.com/forums/showthread.php?t=3990 Link to comment Share on other sites More sharing options...
ltron Posted July 11, 2015 Author Share Posted July 11, 2015 Many thanks for the replies and thanks jonnyguru for the very informative link. My original confusion was due to the omission of "Over-current protection" in the specs page for the both the HXi and RMi series on the Corsair website (a mistake I think). However, the manual clearly states that it has OCP on the 3.3v, 5v and 12v rails. Out of interest, do you know if the RMi 1000w PSU has one 12v source or two? According to the techpowerup review it has 8 rails in default mode which is why I was wondering whether two sources were split into two lots of four or one source into 8. Techpowerup's review is confusing as they say that disabling multi-rail mode disables OCP: "A Weltrend WT7502 supervisor IC is installed on the mainboard. There are also two WT7518 supervisor ICs on the modular PCB; these probably provide OCP for the +12V rail once you enable multi-rail mode through Corsair Link." and "The Corsair Link software provides interesting options as it can be used to monitor and log fan speed and current or +3.3V, +5V, and +12V voltages. You can also monitor power-out, check power-in and efficiency or enable and disable OCP on the +12V rails." http://www.techpowerup.com/reviews/Corsair/RM1000i/4.html Lastly, I assume the PSU doesn't fall into this category: "is it true that some PSU's that claim to be multiple +12V rails don't have the +12V rail split at all?". Link to comment Share on other sites More sharing options...
Corsair Employee jonnyguru Posted July 11, 2015 Corsair Employee Share Posted July 11, 2015 The RM1000i has a single +12V rail source that is then split up into multiple +12V rails. Link to comment Share on other sites More sharing options...
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