I ended up buying an 9D64 and paired it up with an
H14-SSL-NT motherboard and 2 sticks of RAM. Here are my findings so far:
BIOS showed this CPU has no L3 cache but
lscpu shows 176MB,
The CPU runs cool because the base frequency is 1 GHz and it doesn't boost very high.
Processor family is 19H.
I ran stress-ng on all cores for an hour and it handled it with ease and temps on my AIO didn't rise that much.
A general stress-ng caused an immediate freeze.
Neither of the 2 M.2 slots worked.
PCIe slots 1 and 3 - both Gen 5 x16 slots worked.
Here's
lscpu output:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 52 bits physical, 57 bits virtual
Byte Order: Little Endian
CPU(s): 176
On-line CPU(s) list: 0-175
Vendor ID: AuthenticAMD
Model name: AMD EPYC 9D64 88-Core Processor
CPU family: 25
Model: 160
Thread(s) per core: 2
Core(s) per socket: 88
Socket(s): 1
Stepping: 1
Frequency boost: enabled
CPU(s) scaling MHz: 34%
CPU max MHz: 2973.1780
CPU min MHz: 1000.0000
BogoMIPS: 2396.44
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 fx
sr_opt pdpe1gb rdtscp lm constant_tsc rep_good amd_lbr_v2 nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf rapl pn
i pclmulqdq monitor ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy sv
m extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext pe
rfctr_llc mwaitx cpuid_fault cpb cat_l3 cdp_l3 hw_pstate ssbd mba perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsba
se bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni
avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local user_shstk avx512_bf1
6 clzero irperf xsaveerptr rdpru wbnoinvd amd_ppin cppc arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid
decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku ospke avx512
_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq la57 rdpid overflow_recov succor smca fsrm flush_l
1d debug_swap
Virtualization features:
Virtualization: AMD-V
Caches (sum of all):
L1d: 2.8 MiB (88 instances)
L1i: 2.8 MiB (88 instances)
L2: 88 MiB (88 instances)
L3: 176 MiB (11 instances)
NUMA:
NUMA node(s): 1
NUMA node0 CPU(s): 0-175
Vulnerabilities:
Gather data sampling: Not affected
Ghostwrite: Not affected
Indirect target selection: Not affected
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Old microcode: Not affected
Reg file data sampling: Not affected
Retbleed: Not affected
Spec rstack overflow: Mitigation; Safe RET
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Spectre v2: Mitigation; Enhanced / Automatic IBRS; IBPB conditional; STIBP always-on; PBRSB-eIBRS Not affected; BHI Not affected
Srbds: Not affected
Tsa: Vulnerable: No microcode
Tsx async abort: Not affected
Vmscape: Mitigation; IBPB before exit to userspace