Interesting. I did a small handful of builds with the early revs of that mobo (1.0 - 1.02) and it did not have a chipset that supported a 400FSB. My further builds were with rev 2.x, which did have a supporting chipset. I didn't do any builds inbetween those revs. Looking at the BIOS release notes, and the CPU compatibility charts on Asus' site, it seems that 400FSB support started with revs 1.04 and higher.
Bartons are not supported until rev 1.04, so hopefully you have at least that rev. Here's a link to the CPU compatibility chart:
http://support.asus.com/cpusupport/c...Language=en-us
I remember all the news flak about nVidia calling the nForce 2 chipset the "400" when it did Not support 400FSB. It was the nForce 2
Ultra 400 that started supporting the 400FSB.
Here's a quote from nVidia's site:
Quote:
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NVIDIA nForce2 Ultra 400 is the only core-logic solution available for AMD Athlon XP processor-based PCs to incorporate support for the AMD advanced 400MHz frontside bus, DDR400 memory modules and a performance-boosting, dual channel memory subsystem.
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So it seems Asus started putting the Ultra 400 in there at rev 1.04 and higher, not the 2.0 like I was remembering...
PS: Asus' CPU link doesn't keep the mobo info, so you'll have to plug it in...
