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The 21.5 and 27-inch iMacs come standard with SSDs, and the SSDs in the 27-inch iMac offer fast performance up to 3.4GB/s.
Ultimately, both machines are slow, and both machines are slow because they use old-fashioned spinning hard drives, not solid-state drives. They do, however, make booting up and other disk-intensive tasks much quicker. The odd thing is that Apple still sells iMacs without one.
Here are the top ways to speed up a Mac:
Click the Apple icon in the top-left corner of your Mac. This will bring up a drop-down menu. Pick the top option: About This Mac. The resulting window should show you the information you need including processor speed, memory, and graphics card information.
View CPU activity in Activity Monitor on Mac
You can check the memory on a Mac computer in its Activity Monitor. The memory pressure graph will let you check your memory. In basic terms, if the graph appears green, you have a lot of memory left; if it appears red, your memory is low. Yellow means it’s somewhere in the middle.
How to Check RAM size and RAM speed on your Mac
Only 40 – 60% usage? That is good! In fact, the lower a game uses your CPU, the better the gaming experience will be. It also means your CPU is ridiculously powerful.
If your CPU usage is around 50 percent while nothing is running then you may have an app that’s running in the background, or Windows 10 is updating or doing post-update checks.
If your GPU usage is at 60%, but CPU usage is 100% while gaming, you have a bottleneck. If framerates are acceptable at your chosen resolution and settings, then no need to worry. If, however, things get choppy at times and you see frequent dips in framerates, you should consider revising your hardware.
Now, how hot should your CPU be? The CPU temp depends entirely on the CPU used. In general, anything between 40°C and 65°C (or 104°F – 149°F) is considered a safe heat range during a normal workload.
Some CPUs will never shut off because of temperatures whereas some shut off anywhere from 80-100 degrees. Also, 55 degrees is a very respectable CPU temperature, You’ll be fine anywhere until around 75 degrees.
60–70°C is still good, even 70–75°C can still be acceptable. Temperature 80°C is a bit suspicious (probably there is something wrong with an airflow in your computer case), but CPU or GPU can still work fine without being destroyed. Temperature 90°C is considered dangerous and can cause automatic shut down.
It wont damage the cpu unless you go above 100. Those temps are not great. CPUz for example uses about 20% less than a x264 encode, so it’s not particularly hungry.