Well stated question for a late Saturday night.
Let me address the hard drive issue first, you have several questions here and I may go to sleep before addressing them. The 2010 iMac used a Apple proprietary hard drive with special heat sensors. There are three different sensors for the three major brands of hard drives, Using the wrong drive or matching with the wrong sensor will cause the fans to run away and burn up the hard dive. OWC offers a fix for the drives without the custom sensor port, but it's about $40.
The Apple Hard drive sensors are:
Apple Part #'s
- 922-9215 - Hitachi
- 922-9216 - Seagate
- 922-9622 - Western digital
I do like the Seagate SSHD drives, I've had one failure in the last 100 drives I've installed and it was bad from the git-go.
Here's the info on the OWC solution: http://eshop.macsales.com/item/OWC/DIDIM...
- RAM Type: PC3-10600 DDR3 Min. RAM Speed: 1333 MHz
- Details: Supports 1333 MHz PC3-10600 DDR3 SO-DIMMs (204-pin).
- Standard RAM: 4 GB Maximum RAM: 16 GB
Details: By default, 4 GB of RAM is installed as two 2 GB SO-DIMM modules. Two slots free.
To max out use 4X4 to get to 16.
Better is to just add 2 - 4 MB sticks and take it to 12MB. Just my opinion.
The iMac "Core i5" 3.6 21.5-Inch (Mid-2010) technically is a "configure-to-order" configuration of the iMac "Core i3" 3.2 21.5-Inch (Mid-2010), The iMac "Core i5" 3.6 21.5-Inch Aluminum (Mid-2010) is powered by a dual core 3.6 GHz Intel "Core i5" I5-680 (Clarkdale) processor with a dedicated 256k level 2 cache for each core and a 4 MB shared level 3 cache. In lieu of a system bus, it has a "Direct Media Interface" (DMI) that "connects between the processor and chipset" at 2.5 GT/s.
That's all I will give you for tonight as It's past my bed time and they don't pay me for overtime. In fact they don't pay me at all, I'm just a volunteer here.
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