OWC - 8GB DDR3 1600 PC3-12800 CL11 2Rx8 240-pin 1.5V Non-ECC UDIMM Memory RAM Module - Black Chips

G.SKILL 8GB DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C16S-8GVKB

4GB PC10600 DDR3 1333MHz SO-DIMM Memory Compatible With 2011 MacBook Pro, Mid 2010/2011 21.5" & 27" iMac models, 2011 Mac mini Product Specs: Technology: DDR3 SO-DIMM Density: 2GB (2048MB) RoHS: Yes Comp Count: 16 Op. Depth: 256Mb Width: x64 Pin Count: 204-pin Temp.: 0C to +85C Data Rate: DDR3-1333 Speed: PC3-10600 CL: CAS 9-9-9-24 Cycle Time: 1.875ns Voltage: 1.5V Comp Config: 128Meg x 8 ECC: Non ECC Module Ranks: Dual Rank Register: Non Parity. Low Noise 8-Layer PCB. Fully Compliant with JEDEC specification. RoHS Certified Warranty Safe Upgrade. OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program. Compatible with: iMac: 27-inch Mid 2011 (May, 2011) Model ID: iMac12,2 (2.7GHz i5, 3.1GHz i5, 3.4GHz i7);iMac: 27-inch Mid 2010 (July, 2010) Model ID: iMac11,3 (2.8GHz, 2.93GHz, 3.2GHz, 3.6GHz);iMac: 21.5-inch Late 2011 (August, 2011) Model ID: iMac12,1 (3.1GHz i3);iMac: 21.5-inch Mid 2011 (May, 2011) Model ID: iMac12,1 (2.5GHz i5, 2.7GHz i5, 2.8GHz i7);iMac: 21.5-inch Mid 2010 (July, 2010) Model ID: iMac11,2 (3.06GHz, 3.2GHz, 3.6GHz);Mac mini: Mid 2011 (July, 2011) Model ID: Macmini5,1 & Macmini5,2 (2.3GHz, 2.5GHz, 2.7GHz); Mac mini: Mid 2011 Server (July, 2011) Model ID: Macmini5,3 (2.0GHz); MacBook Pro: 17-inch 2011 (October, 2011) Model ID: MacBookPro8,3 (2.4GHz, 2.5GHz); MacBook Pro: 17-inch Early 2011 (February, 2011) Model ID: MacBookPro8,3 (2.2GHz, 2.3GHz); MacBook Pro (15-inch 2011)(October, 2011)Model ID: MacBookPro8,2 (2.2GHz, 2.4GHz, 2.5GHz); MacBook Pro: 15-inch Early 2011 (February, 2011) Model ID: MacBookPro8,2 (2.0GHz, 2.2GHz, 2.3GHz); MacBook Pro: 13-inch 2011 (October, 2011) Model ID: MacBookPro8,1 (2.4GHz, 2.8GHz); MacBook Pro: 13-inch Early 2011 (February, 2011) Model ID: MacBookPro8,1 (2.3GHz, 2.7GHz); PC Laptops: Compatible with certain PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Capacity: 4GB --- Technology: DDR3 --- Speed: PC3-12800 1600MHz CL11 --- ECC Type: Non-ECC Unbuffered --- Form Factor: 240-Pin Non-ECC DIMM (UDIMM) --- Voltage: 1.5V --- Backward Compatibility: Also compatible with 1333MHz and 1066MHz --- Replacement For: ASUSTOR AS7R-RAM4G --- OWC DDR3 memory is Fully compliant with JEDEC specifications, ROHS compliant, providing a warranty safe upgrade. OWC Memory is the most cost effective and simple DIY upgrade you can install to unleash your Mac or PC's full potential and speed up overall responsiveness. Become a multitasking maven when you upgrade your Mac or PC with OWC Memory. Open more apps. Open larger files. Plus, work with multiple files all at the same time. We test every OWC memory module at our in house lab so you can upgrade with the confidence that your memory is built to last. We built your OWC Memory upgrade to meet or exceed the toughest industry specs to provide years of worry-free service. OWC recommends that all DIMMs be the same capacity, speed, and manufacturer to ensure optimal memory performance.