___________________________________________ Alienware 13 (late 2014) - Core i5-4510u, 12GB, 480GB PNY XLR8 SSD, nVidia 860M, Graphics Amp: PNY GTX 960 Inspiron 11-3180 (late 2018) - A6-9220e, 4GB, 32GB eMMC Inspiron Micro Desktop (mid 2015) - Celeron, 4GB, 32GB eMMC Feel free to call me Greggers Other: iPhone XR, iPad Air, Mac mini, Hisense Chromebook (ARM-powered) Retired and Donated to charity: Inspiron 530, Inspiron Mini 10, Inspiron M5030 (donated to mom, she's a charity case ), XPS 720 Red & Silver, Venue 8 Pro - Red edition, Inspiron 11-3162. ___________________________________________ Alienware 13 (late 2014) - Core i5-4510u, 12GB, 480GB PNY XLR8 SSD, nVidia 860M, Graphics Amp: PNY GTX 960 Inspiron 11-3180 (late 2018) - A6-9220e, 4GB, 32GB eMMC Inspiron Micro Desktop (mid 2015) - Celeron, 4GB, 32GB eMMC Feel free to call me Greggers Other: iPhone XR, iPad Air, Mac mini, Hisense Chromebook (ARM-powered) Retired and Donated to charity: Inspiron 530, Inspiron Mini 10, Inspiron M5030 (donated to mom, she's a charity case ), XPS 720 Red & Silver, Venue 8 Pro - Red edition, Inspiron 11-3162. ___________________________________________ Alienware 13 (late 2014) - Core i5-4510u, 12GB, 480GB PNY XLR8 SSD, nVidia 860M, Graphics Amp: PNY GTX 960 Inspiron 11-3180 (late 2018) - A6-9220e, 4GB, 32GB eMMC Inspiron Micro Desktop (mid 2015) - Celeron, 4GB, 32GB eMMC Feel free to call me Greggers Other: iPhone XR, iPad Air, Mac mini, Hisense Chromebook (ARM-powered) Retired and Donated to charity: Inspiron 530, Inspiron Mini 10, Inspiron M5030 (donated to mom, she's a charity case ), XPS 720 Red & Silver, Venue 8 Pro - Red edition, Inspiron 11-3162.

Okay, now I'm TRULY confused - you said he can use 1600 *IF* he leaves in some of the 1066 sticks, so your own answer is wrong - you said, 'No, you are correct. You will need 8GB (4 sticks of 2GB) of 1066MHz.'

Apple MacBook Air 11 Inch 1.4GHz Intel 2010 Product Description. This Apple MacBook Air 11 Inch 1.4GHz 2010 laptop has been refurbished. It has 4GB of onboard Memory 1066 MHz DDR3 SDRAM (PC3-8500) and a 128GB SSD flash storage hard drive.

But, from your earlier answer, it seems that he could have 2 x 1066 2GB sticks; and 2 x 1600 2GB sticks, for a total of 8GB, and it would down-clock to the lower memory speed - right? Use a mac monitor for photo editing. If so, then NO, he does not have to get 4 x 8GB 1066; he can get 2x1066 and 2x1600. I'm with him - I am seeing some REAL deals on the 1600 memory, and I could care less if it down-clocks, I just need the extra memory - plus, he make an excellent point about using it in future upgrades - great way of thinking ahead!