Spexx provided estimation of the CPU performance by looking up a specific CPU in
https://www.cpubenchmark.net/cpu_list.php; then divide "Passmark CPU Mark figure" by 1000 and multiply by 3.6, which comes to a number in hash rate. 2 kh/s is a bit strange, are they running in same conditions, no other programs hanging around?...
thx, it's an AMD Athlon 64 X2 Dual Core 5600+, so according the calculation it should make 5.2 Khs. But since it's my everyday puter it's always multitasking. Now it's making more like 3.3 Khs (multiplying by 2 what I get in the autominer, since it's two threads), so I guess that's fine.
Something is wrong here. My oldest 64 bit AMD processor is an Athlon 64 3000+ single core CPU which is giving around 1.8 Kh/s with my latest generic minerd. I also have a very old Pentium 4 3.2 Ghz single core 32 bit CPU which gives 1.5 Kh/s with the 32 bit minerd. Your CPU should be able to give around 2.8 Kh/s per thread when otherwise idle. My latest generic minerd is a bit quicker than my earlier minerd for the new algorithm so the multiplying factor is now more like 3.9 for regular desktop type CPUs.
I have known some antivirus software to interfere with coin mining and/or peer-to-peer activity, particularly Malwarebytes. Try turning your antivirus shields off to see if it makes a difference. Also, turn off any performance monitoring software you may have running - even just the Task Manager running has a measurable impact on minerd performance. Disable any screensaver programs - blank screen will do just fine thank you - and kill-off anything else that steals CPU time like automatic update schedulers for Google, Java, Adobe etc. The older the CPU, the more sensitive they become to "time stealers". Remember also that if you have the XMG Magi wallet open and staking that it will use CPU time too. Make sure the CPU is not getting too hot! Keep your CPU heatsink and cooling fan clean and free of dust.
Hope this helps