here is some comments from me. My asus z87-plus has ram compatability issues, stability wise. Does also have a possible broken dimm port(s) but I cannot confirm this due to inconsistent testing results. I went to a local large pc vendor who told me they returned 196 asus/gigabyte z87 boards to asus and gigabyte within the past 3 months and have suspended sales of asus boards due to high fault rates which mainly are related to ram performance but not exclusive to ram performance, they also had issues with gigabyte but were not as bad and were resolved via a bios update so the gigabyte sales are not suspended. I told them about my findings and about corsaig vengeance pro and they said they will do some testing with vengeance pro dimms and ring me back. Basically right now I am testing 2 8 gig dimms on the 2 black dimm slots, at my expense I decided to go dual dimm instead of using my existing 4x4gig as I think returning my board is too costly in terms of my time, buying new cooler etc. With my 4gig dimms I have the following issues. all 4 slots used all speeds including underclocked 1066 hci memtest errors. 3 slots with all 4 dimms (yes I did 12 tests) one at a time no errors. sadly I couldnt test one of the slots on its own as the system wont post. the slot that I couldnt test on its when tested with its pair fails hci memtest. however that slot works alongside the other pair in a 3 slot combo and has no errors when testing. using the other slot of the possibly damaged slot pair in a 3 slot combo causes errors (but same slot tests fine on its own). There is newer bios updates which 2 have a very vague "improve system stability" - of course such bios updates shouldnt really be happening as it implies boards were shipped unstable and testers on the internet have held back problem reports from the public or been incompetant. If the asus rep or anyone else comes on and says upgrade your bios dude, the problem is asus stupid policy of blocking bios downgrades is preventing me from upgrading incase I get a regression. The shop told me when they upgraded bios versions on asus z87 boards they did not get an improvement with ram. It turns out various people on the net have managed to get all 4 slots working with corsair vengenace pro ram, this pro ram in the description states is made for haswell and optimised for haswell, why would ram need optimising for haswell? is there some ram incompatability the industry doesnt want us to know about? The problem is corsair vengeance pro has no low profile models. So I had to buy low profile vengeance 2x8gig for now. The shop also told me they not seeing the issues with asus special branded boards like republic of gamer boards, the issues are on the z87 branded boards including the z87-deluxe. With ram issues aside here is a quick review. The bios is amazing, lots of options. However I would like to see better help descriptions as well as some fail safes added. eg. I disabled my channel A (to test channel B only without removing ram) I then disabled the first dimm on channel B, this made the system not post as that was the same dimm slot that wouldnt post on its own when was only physical dimm installed. I hit the memok button which failed to recover, I assume memok will reset timings but not adjust disabled channels/dimms. I had to do a cmos reset. The post screen needs to display hit f8 for boot overide, as it does seem f8 does bring a boot overide menu up, I assumed was removed since there was no indication of it. But I accidently found out its still there when I was hitting f8 for windows safe mode. XMP doesnt fully set timings, I found I had to set some manually (which sadly didnt make my failed tests pass). New ram is XMP 1.3 tho vs old ram been XMP 1.2 so will see if that helps. (still on SPD). Adaptive offset is brilliant. A great way to overclock. However asus need to put in all voltage boxes the default as a reference. A big niggle here and people picked this up on newegg reviews also. What the hell are asus playing at by chipping a bit of the board so it cannot use all 9 standoffs? eg. I may have damaged my board plugging in the psu cable as it bends the board due to it having no support, the cost saving will have been very low, this is just poor product design and decision making from a supposed premium brand, I suspect asus think they only need to worry about their ROG boards as most enthusiasts get those boards and reviewers seem to like ignoring issues like this. This board only uses 6 standoffs, the 3rd row the board doesnt reach. Also a big thumbs down for the new policy of shipping new boards like used boards to hide RMAs in with new stock. In addition all cpuid software does not work properly with this board, as a result any asus z87 owners may be getting misleading data. cpu-z reports the VID not the VCORE in its vcore box. hwmonitor misses various fans and has VCORE in its VIN4 box. I reported to cpuid, and no reply whatsoever, either its deliberate from them or they dont care as the z87-plus isnt a top end board.