AMD A10-7800 Windows 10 says 2 cores 4 Threads but it is a quad core CPU, underclocked memory and underclocked intergrated GPU

[jaccogo]

Already sorry for my english and maybe my knowledge of computers, because i am 14 and live in The Netherlands

I have a few Problem's about my system:

I bought a PC 3 years ago (Pre built) it is an medion akoya e4015 (md 8321) and it has a AMD A10-7800 APU with an R7 Graphics, with 2X 2gb ddr3 1866 MHz, 1TB 5400 RPM or 7200 RPM i don't know (it doesn't matter for the problem) and a 350 Wat psu. Motherboard is a random American Megatrends Inc. board (CPU-Z says that). My problem 1 is that because it's a prebuild i don't know how but my CPU is an official 4 core 4 Thread Prossesor but windows 10 says it is an 2 core 4 thread CPU But CPU-Z and other websiteds say it is a 4 cores 4 threads CPU is that normal or a problem. Problem 2 is that CPU-Z says that my R7 Graphics core speed is 351 MHz but websites say it is a 720 MHz chip. Problem 3 is that CPU-Z says that my ram is clocked at 1197.6 MHz but they are 1866 MHz sticks, is the 1197.6 the speed or something different? in the bios is the 1866 MHz Ram speed selected.
My 4'th Problem is that my CPU should turbo boost up to 3.9 GHz but it never does that, it stops at 3.75 GHz. My 5'th and last question is that my tubo boost last for a very short time, maybe 5 min and then it stops my CPU temps are normal not super hot (CoreTemp says it stays at 30 Celsius but that seems very low for a normal sized air cooler)

I hope anyone can help me solve my problems but i think the people that made my computer just changed things so the computer would run cool and quiet.

Another question is: What cpu core multiplier should i pick for the best performands?

 

[ragnar-gd]

I cannot answer all your questions, and i'm not a CPU-engineer, but i'll start with this, well, opinions:
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4-cores or not four cores...
If you read Windows 10 Taskmanager again, it will say "2 Cores, 4 logical Processors", right?
Microsoft does not follow the dictum of AMD saying "These are 4 Cores, because I, AMD, say so", and that is just correct.
The A10 has two Modules with 2 integer cores each, which AMD counts as 4 cores - but this is not exactly the same as 4 cores at an intel-4-core or a Ryzen-4-core.
It is, technically, between two-cores-four-threads (as in a i3-7xxx) and four-cores (as in a i5-7xxxx), a hybrid, so to say. Or call if a different concept in its entirety, if you will.
It was, by the way, never very good, and for Ryzen, AMD dropped that concept alltogether, and now they have the same as Intel, that is, true cores, and multithreading.
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Turbo-Speed never reaching 3.9:
If you read the specification, the turbo-speed is only reached in certain situations, which are, to my taste, a bit opaque. In effect,only when just one core is used (like by old single-thread games from 1999, as i.e. Stalker), the speed is set. If more threads are used (when i.e. additionally Antivirus is doing a scheduled scan while gaming), only a reduced turbo is used.
All this is meant to protect the CPU from overheating "locally" (within the CPU) in a way the cooler cannot handle.
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Ram-speed
CPU-Z is not a system tool by AMD or Intel or Microsoft, but freeware (and a very good one at that!). It thus has limits. Very often RAM-Speeds can be changed by the operating system on-the-fly, to reduce the use of power. CPU-Z shows just that, the actual used value. What you see in BIOS is the maximum value, which the Operating system or the MoBo may use, or may not, as it sees fit.
And what you see on the advertisment on the package of your RAM is just a... welll... rough estimation, rather than an exact description. I don't call it a blatant lie, as very often it turns out it is true, but depending on MoBo and situation, and magic influence of the stars and planets and the opinion of your dog, it is not.
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Temperatures:
Getting the correct temperatur displayed, is a mystic art, and AMD with its location of the sensors makes it extra-difficult. Assume it is an approximation. Additionally, when CPUs get too warm nowadays, they throttle, so instead of getting (too) hot, they become slower. So, temperature is not, as before, a reliable indicator of high load, but one indicator among two, and then some. You always have to watch the performance at the same time, to see if the CPU is at its thermal limit.
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Overclocking:
I don't do that, as this voids the warranty, and usually reduces the lifetime of MoBos, so you will have to ask that someone else.

 

[TerryLaze]

The CPU has two modules each module has two cores,so it's 2 modules and 4 cores,it's just a different way to say the same thing.
For the rest you have to look at clocks while gaming or doing something heavy since the CPU and GPU clock down when they don't do anything to save power.

 

[jaccogo]

Sorry i replyed so late here in Europe it was night so i was asleep.

Thank you both for the anwsers it realy helpt me. I tryed gaming while having CPU-Z open and my ram speed did go up to close the max speed so thanks for that, and my graphics chip did go to 720 MHz so i just didn't test well.
but i do want to overclock because my pc is 3 years old so i don't have the warranty anymore and i am not so concernt about its lifetime.

still thanks and i am going to look for the overclock in different threads.