lol Has anyone else experienced this? Is there a fix? Tx. Never heard of any Mac taking 30 sec to just chime in. I didn't wait 30 sec to see if it would boot. Can anyone confirm this?Īlso, I've read a couple of people had to wait 30 seconds for the chime when they installed new ram in their iMacs. To my understanding, you have to use 1 and 3 first. I'm wondering if slot 2 and 4 are maybe damaged? I haven't tried using just slot 2 and 4. I've even heard the new iMacs don't have to have ram installed in pairs. As long as I install ram in pairs, it runs like a charm. My Mac Pro has different speed ram modules, with different sizes in it.

Which is strange, because I've never heard of this. I just got off the phone with Apple, and they are saying all modules have to be the same size. But when I put all 4 together, the iMac doesn't boot up. Same goes with just using the original ram. I've tested the new ones on their own in the iMac, and the system boots up fine. New ram is exact same specs as original that came with the iMac. It's clear the engineers at Apple did a great job at designing the 2012 iMac to run tough stuff without 'sweating.For some reason, my iMac late 2013 3.4Ghz quad core i5 won't boot with new ram modules added.

We had to put our ear against the top of the iMac to hear it. The fan RPMs were near idle speed at all times.

'upper limit' = Maximum temperature recommended and maximum possible fan speed Geekbench Stress = Ran the Geekbench Stress Test for one hour. Portal 2 = Steam's Portal 2 timedemo (run several times) at 2560x1440, best settings, 8x AA, and 16x Anisotropy. X-Plane = X-Plane 10 take off and flight of F4 Phantom jet at best settings and 2560x1440. WoW = Blizzard's World of Warcraft: Pandaria run at Ultra preset at 2560x1440. Heaven Bench = Unigine's OpenGL Heaven Benchmark run at 2560x1440, best settingsĭirt 2 = Feral Interactive's Dirt 2 run at Ultra settings at 2560x1440. AE raytrace 3D = 40 minute render of Ray Trace 3D project with Adobe After Effects CS6ĪE CPU crunch = render of Total Training's sample project in After Effects CS6

Buy imac ram test