[SOLVED] HP Z800 Workstation - - - Xeon CPUs not correctly detected by Operating System ?

[mephisto0704]

Hello!

Recently, I acquired an old HP Z800 Workstation from a friend. I plan on using it as an Unraid Server, so I bought two Xeon X5670 CPUs and installed them, but now they are not correctly recognized by Unraid itself or a different Linux Distro I tried (EndeavourOS).
My BIOS is on the latest version (3.61 Rev.A) and recognizes both CPUs without a problem.
Here's what is said on the System Information Window:

Processor Type
Intel(R) Xeon(R) CPU X5670 @ 2.93GHz

Processor Speed
2933/6400 MHz

Processor Stepping
000206C2 0000001E

Cache Size (L1/L2/L3)
384KB / 1536KB / 12MB

Processor Type
Intel(R) Xeon(R) CPU X5670 @ 2.93GHz

Processor Speed
2933/6400 MHz

Processor Stepping
000206C2 0000001E

Cache Size (L1/L2/L3)
384KB / 1536KB / 12MB

But when I boot into Unraid or EndeavourOS only one of two CPUs with only a single core (should be six) are recognized ?
Here's the Output from lscpu:

Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 40 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 1
On-line CPU(s) list: 0
Vendor ID: GenuineIntel
Model name: Intel(R) Xeon(R) CPU X5670 @ 2.93GHz
CPU family: 6
Model: 44
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 1
Stepping: 2
Frequency boost: enabled
CPU(s) scaling MHz: 109%
CPU max MHz: 2927.0000
CPU min MHz: 1596.0000
BogoMIPS: 5863.08
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 popcnt aes lahf_lm epb pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid dtherm ida arat flush_l1d
Virtualization: VT-x
L1d cache: 32 KiB (1 instance)
L1i cache: 32 KiB (1 instance)
L2 cache: 256 KiB (1 instance)
L3 cache: 12 MiB (1 instance)
NUMA node(s): 2
NUMA node0 CPU(s): 0
NUMA node1 CPU(s):
Vulnerability Itlb multihit: KVM: Mitigation: VMX disabled
Vulnerability L1tf: Mitigation; PTE Inversion; VMX conditional cache flushes, SMT disabled
Vulnerability Mds: Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled
Vulnerability Meltdown: Mitigation; PTI
Vulnerability Mmio stale data: Unknown: No mitigations
Vulnerability Retbleed: Not affected
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Retpolines, IBPB conditional, IBRS_FW, RSB filling, PBRSB-eIBRS Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected

What could be the issue here?

Thanks in advantage for any suggestions and your help!

Full Specs:

• Device: HP Z800 Workstation
• Processors: 2x Intel® Xeon® Processor X5670
• Memory: 64 GB Registered ECC RAM (4x8 GB 1600 MHz, 8x4 GB 1333 MHz)
• Graphics: Nvidia Quadro 6000

 

[mephisto0704]

Problem resolved: When comparing my BIOS Setting-Tabs with the ones in a YouTube Video I noticed that some entrys (Hyperthreading and Enabled CPU Cored to be precise) where completely missing from my BIOS Setup-Page.
I then reset the BIOS Settings to factory defaults and for some reason they appeared again so I could edit them accordingly. Now everything works just fine and UnRaid shows every Core available.