R6 and R7, 8, 9 oem motherboard proprietary LED controller header may use different pinout for the power switch.  Dell is notorious of this surreptitious change of multi pinout from model to model.   e.g., Front panel pwr sw connector on white 12 pin motherboard header pins 4 and 5 on the R8, pins 3 and 4 on the R7 R6 user reported pin 3 and 4 of led controller white connector are the pwr sw. R9 user reports pin 3 and 4. R10 user reports pins 4 and 5 (from the left) on the led controller header enabled the case power switch R11 pin 4 and 8. Although some Aurora models use same power button or led cable, it is the motherboard LED controller pinout that could vary among models. DP/N 29F15 = R5 and R6 power button  Dell part 0JNP2 = power button cable Aurora R9/R10/R11/R12 if one believes these user reports, R6 and R7 use pin 3-4, R8 and R10 use pin 4-5. another issue:  R5-7 do not have a rear I/O shield that's removable.   [IMAGE]   you need to make sure R7-9 board back IO aligns with R6.   below are back panel of R6 vs R8. [IMAGE] [IMAGE] and R9  [IMAGE]  
Hello everyone! I got a hand-me-down Aurora R6 from my buddy. I've been looking on these forums for a little bit, but I can't find anything that specifically targets what I'm trying to do. Lots of close things, but not exactly. Sticking with the Alienware motherboards, which ones will fit perfectly or at least almost perfectly into my R6 case? Several of the case designs look completely identical. Like from the outside, I couldn't tell the R6 from the r7 or 8. Even looking at photos of the raw motherboards themselves outside of a case, they look identical, unless there's some really minute subtle differences that aren't evident from a picture. Does anyone know specifically if the R7, R8, or even R9 mobos will pop in my R6 case with little to no issue?
Aurora R6, case options