Insane3D,
If you take a look at MWave's description of the 8K5A2 board at
http://direct.mwave.com/mwave/doc2/a16116.html you will see the earlier 5 PCI slot version of the board. MWave has since corrected their description (but not the photo), while a few days ago NewEgg's photo showed the updated board, but the description said 5 PCI slots (I just checked and the 2 version is no longer even listed on their site). Bunta.Com also shows the previous 5 slot version at
http://www.bunta.com/products/prodspec.asp?item=MOEP8K5A2 .
I actually prefer the spacing around the CPU socket better on the 5 slot version because everything is moved to the left side of the board, which appears to allow the space between the northbridge and the cpu socket to be to be an additional 3/16" (5 mm). It appears that the airflow would also benefit from the agp slot being moved to the left by one slot position.
As for the northbridge heatsink itself, I wish EPoX would have retained either the square one, or the rectangular one, because the newer "fancy" looking one cuts down further on the space between itself and the CPU socket due to the curved overhang portion (compared to a flat edge).
As for the different board layouts, my guess is that at some point EPoX decided to consolidate board layouts and just add/remove or disable features. Where there were 4 differences between the 5A and 5A+ (RAID, LAN, 6 channel vs 2 channel sound, 6th PCI socket), there are now just 3. The insignificant price difference makes the decision a no-brainer for most buyers. I also wish all board manufacturers would show a dimensional diagram of the socket area so buyers who purchase online/mail order will know what heat sink fan assemblies will fit, instead having to email the manufacturer, or guessing and finding out by trial and error.
It would help if the HSF manufacturers likewise fully speced (including a drawing) the dimensions of their fan assemblies. A good example of that is ThermalTake. The spec for the Volcano 7 shows the fan at 80mmx80mm while the heatsink is 70mm(latch edge) x 68mm. Their spec for the upgraded Volcano 9 says the fan and heatsink are both 80mm x 80mm, when in fact it is the same size heatsink as the V7 (70mm x 68mm). I wonder how many passed on the affordable, controllable speed Volcano 9 because they actually thought the heatsink was 80x80 (I received this info from ThermalTake support and was told they will be updating the specs on their site soon).
Lastly, I prefer to buy OEM CPUs from MWave since they are the only ones to offer 1 year warranty (I believe NewEgg and Krex are 30 days, and Bunta is 15 days). As for the retail versions, I don't think most read AMD's warranty specs because it clearly states that the Retail version 3 year warranty ONLY applies if you use it as is with their HSF and thermal solution... meaning no Artic Silver, etc.). From what I have read, the AMD supplied HSF's are average performers and on the noisy side.
AMD's warranty states: This Limited Warranty shall be null and void if the AMD microprocessor which is the subject of this Limited Warranty is used with any heatsink/fan other than the one provided herewith. See http://www.amd.com/us-en/Corporate/AboutAMD/0,,51_52_502_3210^3243^2139,00.html .
Thanks for posting all the info and links for the EPoX boards.
Jim