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I have a 2009 iMac that I replaced the hard drive and upgraded the memory, now the system is freezing up. Here are the spec on the system and hard drive I put in: 2 TB Toshiba DT01ACA Series 3.5-inch SATA 6.0Gb/s (3.0Gb/s and 1.5Gb/s backwards compatible) 7200RPM Hard Drive with 64MB Cache; Toshiba My iMac’s specs: Introduction Date: March 3, 2009 Discontinued Date: October 20, 2009 Processors: 1 (2 Cores) Architecture: 64-BitProcessor Speed: 2.66 GHz Processor Type: Core 2 Duo (E8135)Turbo Boost: N/A Custom Speeds: N/AProcessor Upgrade: ZIF Socket FPU: IntegratedSystem Bus Speed: 1066 MHz Cache Bus Speed: 2.66 GHz (Built-in)ROM/Firmware Type: EFI EFI Architecture: 64-BitL1 Cache: 32k/32k L2/L3 Cache: 6 MB (on chip)RAM Type: PC3-8500 DDR3 Min. RAM Speed: 1066 MHzStandard RAM: 4 GB Maximum RAM: 8 GBMotherboard RAM: None RAM Slots: 2Video Card: GeForce 9400M VRAM Type: IntegratedStandard VRAM: 256 MB Maximum VRAM: 256 MBBuilt-in Display: 24.0" Widescreen Native Resolution: 1920x12002nd Display Support: Dual/Mirroring 2nd Max. Resolution: 2560x1600Standard Storage: 640 GB HDD Std. Storage Speed: 7200 RPMStorage Dimensions: 3.5" (26.10 mm) Geekbench 2 (32): 3680 Geekbench 2 (64): 4064Geekbench 3 (32): 1473 Geekbench 3 (32): 2589Geekbench 3 (64): 1595 Geekbench 3 (64): 2840
Could be bad ram. Try to remove the ram you installed and put the original stuff back in. Bad ram can sometimes cause freezing and other strange issues. I once had bad ram that constantly caused my pc to Bluescreen of death. Try swapping ram and let me know if it works! Hope this helps and good luck fixing!
Sorry to say your HD will not work in a SATA II (3.0 Gb/s) system. If you look at the Toshiba spec sheet it only lists SATA III (6.0 Gb/s). It does list the drive is SATA III spec compliant “Serial ATA 3.0 / ATA-8” which can be a bit confusing! As some people assumed Serial ATA 3.0 meant SATA II (3.0 Gb’s) also being 3.0. This is why I don’t use the Arabic numerals but instead use the Roman numbers to call out the interface spec and the data rate. The standard was updated that required people use the arabic number but it must include the ‘Gb/s’ suffix so as not to confuse. I’m sticking with the Roman as well as the data rate as I want to be perfectly clear. Think of it this way to, too & two all sound the same but are very different from each other ;-} Here’s an example of a auto sense drive Vs the fixed speed Toshiba drive: Seagate Desktop SSHD. Note the Interface line lists the drive as ‘SATA 6Gb/s NCQ" but the SATA Transfer Rates Supported (Gb/s) line lists “6.0/3.0/1.5” where the Toshiba lists Interface Speed as “6.0 Gbit/s Max.”
