I have a 4 core Phenom in another box that works just fine.

This box was just built from scratch with the latest stage 3 tarball.

Let me know if there is anything else you need.  It's been years since I have reported a bug.


This is a 6 Core Phenom:

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 16
model           : 10
model name      : AMD Phenom(tm) II X6 1055T Processor
stepping        : 0
cpu MHz         : 2800.000
cache size      : 512 KB
physical id     : 0
siblings        : 6
core id         : 0
cpu cores       : 6
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 6
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb npt lbrv svm_lock nrip_save pausefilter
bogomips        : 5599.92
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate [9]



Portage 2.2.0_alpha30 (default/linux/amd64/10.0, gcc-4.4.5, libc-0-r0, 2.6.38-gentoo-r1-Workstation-Pre-4 x86_64)
=================================================================
System uname: Linux-2.6.38-gentoo-r1-Workstation-Pre-4-x86_64-AMD_Phenom-tm-_II_X6_1055T_Processor-with-gentoo-1.12.14
Timestamp of tree: Tue, 26 Apr 2011 08:45:01 +0000
app-shells/bash:     4.1_p9
dev-java/java-config: 2.1.11-r3
dev-lang/python:     2.7.1-r1, 3.1.3-r1
dev-util/cmake:      2.8.4
sys-apps/baselayout: 1.12.14-r1
sys-apps/sandbox:    2.4
sys-devel/autoconf:  2.13, 2.65-r1
sys-devel/automake:  1.9.6-r3, 1.10.3, 1.11.1
sys-devel/binutils:  2.20.1-r1
sys-devel/gcc:       4.4.5
sys-devel/gcc-config: 1.4.1
sys-devel/libtool:   2.2.10
sys-devel/make:      3.81-r2
sys-kernel/linux-headers: 2.6.38
virtual/os-headers:  0
Repositories: gentoo
Installed sets: 
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=amdfam10 -O2 -pipe -msse3"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=amdfam10 -O2 -pipe -msse3"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=4 --load-average=10 --keep-going"
FEATURES="assume-digests binpkg-logs distlocks fixlafiles fixpackages metadata-transfer news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS=""
GENTOO_MIRRORS="http://gentoo.osuosl.org/ ftp://mirrors.tds.net/gentoo http://mirror.datapipe.net/gentoo"
LANG="en_US"
LC_ALL="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="en_US en"
MAKEOPTS="-j16"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://gensync.jgsystems.net/gentoo-portage"
USE="X a52 aac acl acpi alsa amarok amd64 ao aotuv apm asf audiofile automount avahi avi bash_completion berkdb bitmap-fonts bluetooth bzip2 cairo caps cdda cddb cdio cdparanoia cdr cdrom clearpasswd cli cracklib crypt css cups curl curlwrappers cxx dbase dbus directfb divx4linux djvu dlloader dri dts dv dvb dvd dvdr dvdread encode esd extensions fbcon ffmpeg firefox flac foomaticdb fortran ftp fuse gdbm gif gimp gimpprint gnome gnutls gpm gs gstreamer gtk gtk2 gtkhtml guile iconv id3 imagemagick imap isdnlog jack java jpeg jpeg2k kde kpathsea lame lash libcaca libg++ libnotify libsamplerate lm_sensors mad matroska mbox mixer mjpeg mmx mng modules mp3 mp4 mpeg mpeg2 mplayer mudflap multilib mysql nas ncurses nfs njb nls nptl nptlonly nsplugin ntfs ntplonly ogg oggvorbis openal opengl openmp osc oss pam pcre pdf perl png portaudio ppds pppd pulseaudio python qt3 qt3support qt4 quicktime rdesktop readline reflection reports samba scanner sdl semantic-desktop server session sound sox spell spl sqlite sse sse2 ssl stream svg swat sysfs tcpd theora threads thunderbird tiff tk truetype truetype-fonts twolame type1-fonts udev unicode usb userlocales v4l v4l2 vcd vnc vorbis wma wmf x264 xine xinerama xinetd xml xorg xprint xulrunner xv xvid zip zlib" ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en_US en" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="dummy fbdev fglrx radeon vesa" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" 
Unset:  CPPFLAGS, CTARGET, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS