My 2010 iMac came with 4GB.
It has 4 slots with 2 GB SIMMS.
I recently upgraded to 16GB. using 2 8GB DIMMS.
Filling slot's 2 with both DIMMS.
About Mac shows 16GB.
It periodically reboots. Do I need to have the SIMMS replaced or place the simms in slots 1 and 1?
v/r
Eugene
iMac, Mac OS X (10.7), had mini output through HDMI
There is a very good chance you have failing RAM. This is not uncommon. It could be that the RAM vendor delivered broken RAM (not on purpose, but stuff happens), or you got the wrong specifications and the RAM is not keeping up with the Mac. Or some other issue.
You should most likely get your RAM vendor to replace them, or return them for a full refund and choose another RAM vendor (only you can decide which would be better).
Bad RAM does happen, even from the best RAM suppliers. How they treat you when you have an issue is sometimes more important than anything else.
Long term forum responders seem to like Crucial.com and MacSales.com for RAM. Both very reliable vendors and they do stand behind their products and are prompt with repair/replacement.
If you want to run some tests, you could use Rember
<http://www.kelleycomputing.net/rember/>
You should boot your mac into Safe Mode and NOT start any other apps so that Rember has the maximum amount of RAM available for testing.
<http://support.apple.com/kb/ht1564>
When you run Rember, set the repeat count to a very high value so that it will run overnight. Single pass testing is never enough for RAM testing. Sometimes it takes hours and hours for a RAM failure to make itself known.
There is a very good chance you have failing RAM. This is not uncommon. It could be that the RAM vendor delivered broken RAM (not on purpose, but stuff happens), or you got the wrong specifications and the RAM is not keeping up with the Mac. Or some other issue.
You should most likely get your RAM vendor to replace them, or return them for a full refund and choose another RAM vendor (only you can decide which would be better).
Bad RAM does happen, even from the best RAM suppliers. How they treat you when you have an issue is sometimes more important than anything else.
Long term forum responders seem to like Crucial.com and MacSales.com for RAM. Both very reliable vendors and they do stand behind their products and are prompt with repair/replacement.
If you want to run some tests, you could use Rember
<http://www.kelleycomputing.net/rember/>
You should boot your mac into Safe Mode and NOT start any other apps so that Rember has the maximum amount of RAM available for testing.
<http://support.apple.com/kb/ht1564>
When you run Rember, set the repeat count to a very high value so that it will run overnight. Single pass testing is never enough for RAM testing. Sometimes it takes hours and hours for a RAM failure to make itself known.
Thanks Bob.
I did replace the RAM. Went back to the vendor and they issues me the wrong RAM again.
They sold me 8GB of RAM versus the 4GB x 4 that I wanted.
v/r
Eugene
My Mid 2010 Imac reboots after a 16GB upgrade. No beeps or error messages on bootup.
