The last update to the excellent memconf utility (V2.5 22-Feb-2008) support properly recent Solaris Express releases, and my recent change from the stock AMD Opteron Processor 148 to an AMD Athlon 64 X2 Dual Core Processor 3800+. (I mostly did that change just to be able to access two run queues separately, not to gain more power per se.)

So, here is the new and appropriate memconf report:

# memconf -d
memconf:  V2.5 22-Feb-2008 http://www.4schmidts.com/unix.html
hostname: unic
manufacturer: Sun Microsystems, Inc.
model:    Sun Ultra 20 Workstation (AMD Athlon(tm) 64 X2 Dual Core \
 Processor 3800+ Socket 939 2010MHz)
Sun Family Part Number: A63
Solaris Express Community Edition snv_87 X86, 64-bit kernel, SunOS 5.11
1 AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ Socket 939 2010MHz cpu
diagbanner = Sun Ultra 20 Workstation
cpubanner = AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ Socket 939 2010MHz
model = Sun Ultra 20 Workstation
machine = i86pc
platform = i86pc
perl version: 5.008004
CPU Units:
==== Processor Sockets ====================================
Version                          Location Tag
-------------------------------- --------------------------
AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ Socket 939
AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ Socket 939
Memory Units:
Type    Status Set Device Locator      Bank Locator
------- ------ --- ------------------- --------------------
unknown in use 0   A0                  Bank0/1
unknown in use 0   A1                  Bank2/3
unknown in use 0   A2                  Bank4/5
unknown in use 0   A3                  Bank6/7
total memory = 2048MB (2GB)

You can check and compare with the previous report on my blog.