EPoX claims that the EP-8NPA SLI is an ethusiast's motherboard for owners of Socket 754 processors. I should have noticed that their website stressed that you didn't need a fast processor in order to maintain great SLi based performance.
My personal system was based on a Chaintech VNF3-250 motherboard with a fully unlocked 6800LE videocard (leadtek) and depending on what settings I was using in BIOS I used HyperX memory of either DDR33, DDR400, or DDR500 speed (I have at least one 512MB strip of each). Installed in this system was an Athlon 64 2800+ mobile processor (which worked perfectly). In combination this system flew, but the mobile 2800+ is clocked slightly slower than the desktop version. It overclocks well but runs surprising warm (even with good air cooling).
To make a long story shorter, I purchased the first A64 4000+ mobile processor I could get my hands on. This processor involves a die shrink, it run cooler, has SSE3 instructions, and an improved memory controller. AND it works flawlessly in the Chaintech VNF2-250.
When combined with the parts from above system, what flew before blasted past the sound barrier a when the 4000+ mobile processor was added. Adding an Audigy sound card further spped up the system to the point where my benchmarks were significantly hirger than many Socket 939 system (and ALL socket 754 systems).
Then I decided I' d like to try a PCI-e graphics card. While there were many Socket 754 Motherboard on the market that would have worked with my existing components (except, of course, for the video card) I chose the EPoX EP-8NPA SLI because in addition to PCI-e it offers SLi support, SATA2capability, and gigabyte ethernet networking. Sounded like heaven.
WELL, next time I'll do a little more reasearch. The EPox motherboard DOES NOT support mobile processors in any fashion. My 2800+ and 4000+ processor REFUSE to post on this board. EPoX techical support claims they will not be adding this feature to future BIOS revisions (as they state that there are significant differences btween the DTR line and the standard desktop line).
As we all know, currently there are only minor diiferences between the DTR's and the current desktop units - usually requiring a few minor BIOS tweaks to recognize these units (Chaintech has had NO problem supporting DTR processors - in fact I didn't even need a BIOS upgrade to move from the 2800+ processor to the 4000+).
I had resort to obtaining an A64 3000+ desktop processor (Newark core - surprisingly similar to to core in the new DTRs) to test the EPoX MB for functionality. It works fine, good overclocking feature in BIOS, and a nice combination of harware features (however, obviously, it won't rcognize the DTRs). In addition, it soon became apparent that the fastest processor that this MB can support is a 3700+ desktop processor.
This is a shame for several reasons. First, I already have the DTR 4000+. Second, EPoX is not supporting the fastest processor their MB COULD support (with minor BIOS revisions). Third, I already had the 4000+ clocked up to 2880 GHz aircooled with only an minor upgrade to the processor cooling fan/heatsink. I don't think (without exotic cooling) that the 3700+ is nearly a cabable an overclocker. In fact, I'msure that in the long run I could have gotten even more performance out of the 4000+ (I have watercooling equipment I have as yet to try). Finally, the whole sistuation places EPoX in a less competitive position than their rivals. While I would like to retain the features offered by the EP-8NPA SLI I intend to continue using the mobile 4000+ (which probably means returning it to the Chaintech MB).
Pity, EPox may change its mind (on supporting the DTR), but I doubt it. A third party may be able to revise their BIOS (and that is my next area of exploration). Or, I may just wait for the Socket M2 to perform another upgrade. Only, time will tell.
IN THE MEANWHILE, IT IS IMPORTANT FOR T.H. READERS TO BE AWARE THAT THIS MOTHERBOARD IS COMPLETELY INCOMPATIBLE WITH DTR PROCESSORS (and that there are plenty of alternatives to choose from that will work fine with said processors).
I'd like apologize for the overly long post and I wish you all well in this matter.
PEACE
JRI