I have an old PC with this CPU:

 CPU op-mode(s):         32-bit
 Address sizes:          34 bits physical, 32 bits virtual
 Byte Order:             Little Endian

 On-line CPU(s) list:    0

 BIOS Vendor ID:         AMD                                             
 Model name:             AMD Sempron(tm) 2400+
   BIOS Model name:      AMD Sempron(tm) 2400+                             CPU @ 1.6GHz
   BIOS CPU family:      29
   CPU family:           6
   Model:                8
   Thread(s) per core:   1
   Core(s) per socket:   1
   Socket(s):            1
   Stepping:             1
   BogoMIPS:             3333.66
   Flags:                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat p
                         se36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow cpuid 3dnowprefe
                         tch vmmcall

 L1d:                    64 KiB (1 instance)
 L1i:                    64 KiB (1 instance)
 L2:                     256 KiB (1 instance)

 Gather data sampling:   Not affected
 Itlb multihit:          Not affected
 L1tf:                   Not affected
 Mds:                    Not affected
 Meltdown:               Not affected
 Mmio stale data:        Not affected
 Reg file data sampling: Not affected
 Retbleed:               Not affected
 Spec rstack overflow:   Not affected
 Spec store bypass:      Vulnerable
 Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitizatio
                         n
 Spectre v2:             Mitigation; Retpolines; STIBP disabled; RSB filling; PBRSB-eIBRS No
                         t affected; BHI Not affected
 Srbds:                  Not affected
 Tsx async abort:        Not affected

hi, I have an old PC with this CPU: Architecture: i686 CPU op-mode(s): 32-bit Address sizes: 34 bits physical, 32 bits virtual Byte Order: Little Endian CPU(s): 1 On-line CPU(s) list: 0 Vendor ID: AuthenticAMD BIOS Vendor ID: AMD Model name: AMD Sempron(tm) 2400+ BIOS Model name: AMD Sempron(tm) 2400+ CPU @ 1.6GHz BIOS CPU family: 29 CPU family: 6 Model: 8 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s): 1 Stepping: 1 BogoMIPS: 3333.66 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat p se36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow cpuid 3dnowprefe tch vmmcall Caches (sum of all): L1d: 64 KiB (1 instance) L1i: 64 KiB (1 instance) L2: 256 KiB (1 instance) Vulnerabilities: Gather data sampling: Not affected Itlb multihit: Not affected L1tf: Not affected Mds: Not affected Meltdown: Not affected Mmio stale data: Not affected Reg file data sampling: Not affected Retbleed: Not affected Spec rstack overflow: Not affected Spec store bypass: Vulnerable Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitizatio n Spectre v2: Mitigation; Retpolines; STIBP disabled; RSB filling; PBRSB-eIBRS No t affected; BHI Not affected Srbds: Not affected Tsx async abort: Not affected in some linux (arch 32 bit) I have problem executing firefox, Is there a version for CPU without request from SSE3 Flag? thanks