Skip to main content
  • In Stock
  • Sold by Newegg
  • New
Brands
Show More
Price
Show More
Type
Show More
Capacity
Show More
Speed
CAS Latency
Show More
Voltage
Show More
ECC
Buffered/Registered
Compatible System
Show More
Sold by
All Top Brands
Availability
Condition
Total Capacity
Useful Links
Customer Ratings
  • Featured Brands

    See Deals from Crucial
Sort By:
View:
Crucial 32GB Kit (16GBx2) DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT2K16G4S266M
Quick View
#1 Best Seller
in System Specific Memory
Crucial 32GB Kit (16GBx2) DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT2K16G4S266M
  • Brand: Crucial
  • Capacity: 32GB (16 x 2GB)
  • Speed: DDR4 2666 (PC4 21300)
  • Compatible System: Apple
  • Model #: CT2K16G4S266M
  •  
  • $202.49 
OWC 16GB DDR4 2666 PC4-21300 CL19 2Rx8 260-pin 1.2V ECC Unbuffered SODIMM Memory RAM Module Upgrade Compatible with Synology DiskStation DS1525+ DS1825+ DS1825xs+ DS725+ DS925+
Quick View
OWC 16GB DDR4 2666 PC4-21300 CL19 2Rx8 260-pin 1.2V ECC Unbuffered SODIMM Memory RAM Module Upgrade Compatible with Synology DiskStation DS1525+ DS1825+ DS1825xs+ DS725+ DS925+
  • Voltage: 1.2V
  • Compatible System: Synology DiskStation DS1525+ Synology DiskStation DS1825+ Synology DiskStation DS1825xs+ Synology DiskStation DS725+ Synology DiskStation DS925+
  • CAS Latency: CL19
  • Part Number: 2C6D42R816GB
  • Model #: OWC2C6D42R816GB-C328-SF
  •  
  • $157.26 
Crucial 16GB (2 x 8GB) DDR3 1600 (PC3 12800) Unbuffered Memory for Mac Model CT2K8G3S160BM
Quick View
Crucial 16GB (2 x 8GB) DDR3 1600 (PC3 12800) Unbuffered Memory for Mac Model CT2K8G3S160BM
  • Type: 204-Pin DDR3 SO-DIMM
  • Compatibility: For Apple iMac
  • CAS Latency: 11
  • Voltage: 1.35V/1.5V
  • Model #: CT2K8G3S160BM
Crucial 32GB DDR4 2666 (PC4 21300) Unbuffered Laptop Memory for Mac Model CT32G4S266M
Quick View
Crucial
Crucial 32GB DDR4 2666 (PC4 21300) Unbuffered Laptop Memory for Mac Model CT32G4S266M
  • Type: 260-Pin DDR4 SO-DIMM
  • CAS Latency: 19
  • Voltage: 1.2V
  • Model #: CT32G4S266M
  •  
  • $183.83 
CMS 16GB (1X16GB) DDR4 17000 2133MHz NON ECC DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z240 Tower/SFF NON ECC - C9
Quick View
CMS 16GB (1X16GB) DDR4 17000 2133MHz NON ECC DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z240 Tower/SFF NON ECC - C9
  • Voltage: 1.2V
  • Compatible System: HP Workstation Z240 Tower/SFF
  • CAS Latency: CL15
  • Timing: 15-15-15
  • Model #: 849005084185
  •  
  • $110.00 
  • Free Shipping
A-Tech 32GB Kit (4 x 8GB) RAM for HP Z420, Z620, Z820 | 2nd Gen. HPE Z Workstation | DDR3 1600MHz RDIMM PC3-12800R 2Rx4 1.5V 240-Pin DIMM ECC Registered Server Memory Upgrade Modules
Quick View
A-Tech 32GB Kit (4 x 8GB) RAM for HP Z420, Z620, Z820 | 2nd Gen. HPE Z Workstation | DDR3 1600MHz RDIMM PC3-12800R 2Rx4 1.5V 240-Pin DIMM ECC Registered Server Memory Upgrade Modules
  • Voltage: 1.50V
  • Compatible System: HP Z Workstation Z420, Z620, Z820
  • CAS Latency: CL11
  • Part Number: NE-MS-0096
  • Model #: NE-MS-0096
  •  
  • $78.11 
  • Free Shipping
OWC 4GB DDR4 2666 PC4-21300 CL19 1Rx8 260-pin 1.2V SODIMM Memory RAM Module Upgrade Compatible with Synology DiskStation DS425+
Quick View
OWC 4GB DDR4 2666 PC4-21300 CL19 1Rx8 260-pin 1.2V SODIMM Memory RAM Module Upgrade Compatible with Synology DiskStation DS425+
  • Voltage: 1.2V
  • Compatible System: Synology DiskStation DS425+ Synology DiskStation DS1825+ Synology DiskStation DS1825xs+ Synology DiskStation DS725+ Synology DiskStation DS925+
  • CAS Latency: CL19
  • Part Number: 2S6D41R804GB
  • Model #: OWC2S6D41R804GB-C332-SF
  •  
  • $34.99 
NEMIX RAM 96GB (2X48GB) DDR5 5600MHZ PC5-44800 2Rx8 1.1V CL46 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory KIT Compatible with GIGABYTE B650 GamingXAX Motherboard
Quick View
NEMIX RAM 96GB (2X48GB) DDR5 5600MHZ PC5-44800 2Rx8 1.1V CL46 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory KIT Compatible with GIGABYTE B650 GamingXAX Motherboard
  • Brand: NEMIX RAM
  • Series: Gigabyte Gaming Motherboard Compatible Series Memory
  • Capacity: 96GB (2 x 48GB)
  • Speed: DDR5 5600 (PC5 44800)
  • Model #: MD44800-4828K2-GB-B650XAX
  •  
  • $1,598.49 
  • Free Shipping
NEMIX RAM 96GB (2X48GB) DDR5 5600MHZ PC5-44800 2Rx8 1.1V CL46 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory KIT Compatible with GIGABYTE B650 GamingXAX Motherboard
Quick View
NEMIX RAM 96GB (2X48GB) DDR5 5600MHZ PC5-44800 2Rx8 1.1V CL46 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory KIT Compatible with GIGABYTE B650 GamingXAX Motherboard
  • Brand: NEMIX RAM
  • Series: Gigabyte Gaming Motherboard Compatible Series Memory
  • Capacity: 96GB (2 x 48GB)
  • Speed: DDR5 5600 (PC5 44800)
  • Model #: MD44800-4828K2-GB-B650XAX
  •  
  • $1,598.49 
  • Free Shipping
CMS 4GB (1X4GB) DDR3 12800 1600MHz NON ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 3020 Mt/Sff - A73
Quick View
CMS 4GB (1X4GB) DDR3 12800 1600MHz NON ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 3020 Mt/Sff - A73
  • Voltage: 1.5V
  • Compatible System: Dell Optiplex 3020 Mt/Sff
  • CAS Latency: CL11
  • Timing: 11-11-11
  • Model #: 849005070034
  •  
  • $15.00 
  • Free Shipping
OWC 64GB (2x32GB) DDR5 5600 PC5-44800 CL46 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade Kit Compatible with Dell XPS 8960
Quick View
OWC 64GB (2x32GB) DDR5 5600 PC5-44800 CL46 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade Kit Compatible with Dell XPS 8960
  • Voltage: 1.1V
  • Compatible System: Dell XPS 8960
  • CAS Latency: CL46
  • Part Number: 5U6D52R8064P
  • Model #: OWC5U6D52R8064P-C127-SF
  •  
  • $1,136.56 
OWC 64GB DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC Registered RDIMM Memory RAM Module Upgrade Compatible with Lenovo ThinkAgile HX630 V3 HX650 V3 MX630 V3 MX650 V3 VX630 V3
Quick View
  •  
  • $2,249.99 
OWC 8GB DDR4 RAM Compatible with Synology DiskStation DS923+ 2666MHz PC4-21300 CL19 ECC Unbuffered SODIMM 2Rx8 1.2V Memory Upgrade
Quick View
OWC 8GB DDR4 RAM Compatible with Synology DiskStation DS923+ 2666MHz PC4-21300 CL19 ECC Unbuffered SODIMM 2Rx8 1.2V Memory Upgrade
  • Voltage: 1.2V
  • Compatible System: Synology DiskStationDS923+
  • CAS Latency: CL19
  • Part Number: 2C6D41R808GB
  • Model #: OWC2C6D41R808GB-ZAD-SF
  •  
  • $74.99 
CMS 64GB (4X16GB) DDR4 21300 2666MHZ ECC REGISTERED DIMM Memory Ram Upgrade Compatible with Dell® PowerEdge R440, PowerEdge R540, PowerEdge T440 ECC Register - D61
Quick View
CMS 64GB (4X16GB) DDR4 21300 2666MHZ ECC REGISTERED DIMM Memory Ram Upgrade Compatible with Dell® PowerEdge R440, PowerEdge R540, PowerEdge T440 ECC Register - D61
  • Voltage: 1.2V
  • Compatible System: Dell Poweredge R440, Poweredge R540, Poweredge T440
  • CAS Latency: CL19
  • Timing: 19-19-19
  • Model #: 840055541666
  •  
  • $460.00 
A-Tech 64GB Kit (2x32GB) RAM for Apple iMac (2019, 2020), Mac mini (Late 2018, Early 2020) | DDR4 2666MHz PC4-21300 SODIMM 260-Pin Memory Upgrade
Quick View
  •  
  • $387.01 
A-Tech 16GB Kit (2x8GB) RAM for Apple iMac (Late 2015) | DDR3 1866MHz PC3-14900 SODIMM 204-Pin Memory Upgrade
Quick View
A-Tech 16GB Kit (2x8GB) RAM for Apple iMac (Late 2015) | DDR3 1866MHz PC3-14900 SODIMM 204-Pin Memory Upgrade
  • Voltage: 1.35V
  • Compatible System: Apple Mac Systems
  • Rank: 2Rx8
  • Parts: Lifetime
  • Model #: NE-MAC-0049
  •  
  • $57.88 
CMS 2GB (1X2GB) DDR2 5300 667MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Acer® Aspire One Netbook Kav50, Kav60, Nav50, Nav60, Z68 - A38
Quick View
CMS 2GB (1X2GB) DDR2 5300 667MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Acer® Aspire One Netbook Kav50, Kav60, Nav50, Nav60, Z68 - A38
  • Voltage: 1.8V
  • Compatible System: Acer Aspire One Netbook Kav50, Kav60, Nav50, Nav60, Z68
  • CAS Latency: CL5
  • Timing: 5-5-5
  • Model #: 817025014215
  •  
  • $13.00 
  • Free Shipping
A-Tech 32GB Kit (2x16GB) RAM for Apple iMac (2019, 2020), Mac mini (Late 2018, Early 2020) | DDR4 2666MHz PC4-21300 SODIMM 260-Pin Memory Upgrade
Quick View
  •  
  • $213.77 
CMS 16GB (1X16GB) DDR4 21300 2666MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® ThinkPad P52, ThinkPad P53, ThinkPad P72, ThinkPad P73 - D35
Quick View
CMS 16GB (1X16GB) DDR4 21300 2666MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® ThinkPad P52, ThinkPad P53, ThinkPad P72, ThinkPad P73 - D35
  • Voltage: 1.2V
  • Compatible System: Lenovo ThinkPad P52, ThinkPad P53, ThinkPad P72, ThinkPad P73
  • CAS Latency: CL19
  • Timing: 19-19-19
  • Model #: 840055535085
  •  
  • $110.00 
  • Free Shipping
Samsung ram memory 16GB kit (2 x 8GB) DDR3 PC3L-12800,1600MHz, 204 PIN SODIMM for laptops
Quick View
  •  
  • $49.99 
  • Free Shipping
Black Diamond 8GB DDR5 5600 SODIMM Memory  BD8G5600MCN28
Quick View
Black Diamond 8GB DDR5 5600 SODIMM Memory BD8G5600MCN28
  • Part Number: BD8G5600MCN28
  • Type: 262-Pin DDR5
  • Model #: BD8G5600MCN28
  •  
  • $140.99 
  • Free Shipping
4XEM USB-C AKG Earphones with Mic and Volume Control White 4XSAMEARAKGCW
Quick View
  • $24.99
  •  
  • $23.99 
  • Free Shipping
NEMIX RAM 16GB (1X16GB) DDR4 3200MHZ PC4-25600 2Rx8 1.2V CL22 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory Compatible with Samsung M378A2K43EB1-CWE
Quick View
NEMIX RAM 16GB (1X16GB) DDR4 3200MHZ PC4-25600 2Rx8 1.2V CL22 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory Compatible with Samsung M378A2K43EB1-CWE
  • Brand: NEMIX RAM
  • Series: Samsung Desktop PC Compatible Series Memory
  • Capacity: 16GB
  • Speed: DDR4 3200 (PC4 25600)
  • Model #: MD25600-628K1-M378A2K43EB1-CWE
  •  
  • $124.98 
  • Free Shipping
2X32GB DDR4 NON ECC DIMM 3200MHZ
Quick View
2X32GB DDR4 NON ECC DIMM 3200MHZ
  • Capacity: 32GB
  • Speed: DDR4 3200 (PC4 25600)
  • Buffered/Registered: Unbuffered
  • Chipset: Major Brand Chipset
  • Model #: 840055586940
  •  
  • $235.00 
OWC 8GB DDR4 2666 PC4-21300 CL19 2Rx8 260-pin 1.2V Non-ECC SODIMM Memory RAM Module Upgrade Compatible with Synology DiskStation DS220+ DS420+ DS423+ DS720+ DS920+
Quick View
OWC 8GB DDR4 2666 PC4-21300 CL19 2Rx8 260-pin 1.2V Non-ECC SODIMM Memory RAM Module Upgrade Compatible with Synology DiskStation DS220+ DS420+ DS423+ DS720+ DS920+
  • Voltage: 1.2V
  • Compatible System: Synology DiskStation DS220+ Synology DiskStation DS420+ Synology DiskStation DS423+ Synology DiskStation DS720+ Synology DiskStation DS920+
  • CAS Latency: CL19
  • Part Number: 2S6D42R808GB
  • Model #: OWC2S6D42R808GB-B767-SF
  •  
  • $59.99 
CMS 8GB (1X8GB) DDR4 19200 2400MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Dell® Latitude 12 (E7270), Latitude 13 (3379), Latitude 14 (E7470) - C106
Quick View
CMS 8GB (1X8GB) DDR4 19200 2400MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Dell® Latitude 12 (E7270), Latitude 13 (3379), Latitude 14 (E7470) - C106
  • Voltage: 1.2V
  • Compatible System: Dell Latitude 12 (E7270), Latitude 13 (3379), Latitude 14 (E7470)
  • CAS Latency: CL17
  • Timing: 17-17-17
  • Model #: 849005090438
  •  
  • $49.00 
  • Free Shipping
OWC 8GB DDR4 2666 PC4-21300 CL19 1Rx8 288-pin 1.2V ECC Unbuffered UDIMM Memory RAM Module Upgrade Compatible with PowerEdge R240 T140 T40
Quick View
OWC 8GB DDR4 2666 PC4-21300 CL19 1Rx8 288-pin 1.2V ECC Unbuffered UDIMM Memory RAM Module Upgrade Compatible with PowerEdge R240 T140 T40
  • Voltage: 1.2V
  • Compatible System: PowerEdge R240 PowerEdge T140 PowerEdge T40
  • CAS Latency: CL19
  • Part Number: 2E6D41R808GB
  • Model #: OWC2E6D41R808GB-C067-SF
  •  
  • $74.99 
NEMIX RAM 128GB (4X32GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory KIT Compatible with Dell Precision 3930 Rack Workstation
Quick View
NEMIX RAM 128GB (4X32GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 288-PIN Non-ECC Unbuffered UDIMM Desktop PC Memory KIT Compatible with Dell Precision 3930 Rack Workstation
  • Brand: NEMIX RAM
  • Series: Dell Server/Workstation Compatible Series Memory
  • Capacity: 128GB (4 x 32GB)
  • Speed: DDR4 2666 (PC4 21300)
  • Model #: MD21300-328K4-P3930RW
  •  
  • $798.89 
  • Free Shipping
OWC 16GB DDR4 RAM Compatible with Synology DiskStation DS1522+ 2666MHz PC4-21300 CL19 ECC Unbuffered SODIMM 2Rx8 1.2V Memory Upgrade
Quick View
OWC 16GB DDR4 RAM Compatible with Synology DiskStation DS1522+ 2666MHz PC4-21300 CL19 ECC Unbuffered SODIMM 2Rx8 1.2V Memory Upgrade
  • Voltage: 1.2V
  • Compatible System: Synology DiskStationDS1522+
  • CAS Latency: CL19
  • Part Number: 2C6D42R816GB
  • Model #: OWC2C6D42R816GB-ZAB-SF
  •  
  • $157.26 
OWC 16GB DDR4 3200MHz PC4-25600 CL22 1.2V 288pin Non-ECC UDIMM Memory RAM Compatible with Dell Inspiron 3020 3020S 3880 3891 3910
Quick View
OWC 16GB DDR4 3200MHz PC4-25600 CL22 1.2V 288pin Non-ECC UDIMM Memory RAM Compatible with Dell Inspiron 3020 3020S 3880 3891 3910
  • Voltage: 1.2V
  • Compatible System: Dell Inspiron 3020 Dell Inspiron 3020S Dell Inspiron 3880 Dell Inspiron 3891 Dell Inspiron 3910
  • CAS Latency: CL22
  • Part Number: 3U2D42R816GB
  • Model #: OWC3U2D42R816GB-A544-SF
  •  
  • $109.99 
OWC 16GB DDR4 3200MHz PC4-25600 CL22 1.2V 260pin Non-ECC SODIMM Memory RAM Compatible with Dell Inspiron 15 3501 3511 3520 3525 3530
Quick View
OWC 16GB DDR4 3200MHz PC4-25600 CL22 1.2V 260pin Non-ECC SODIMM Memory RAM Compatible with Dell Inspiron 15 3501 3511 3520 3525 3530
  • Voltage: 1.2V
  • Compatible System: Dell Inspiron 15 3501 Dell Inspiron 15 3511 Dell Inspiron 15 3520 Dell Inspiron 15 3525 Dell Inspiron 15 3530
  • CAS Latency: CL22
  • Part Number: 3S2D42R816GB
  • Model #: OWC3S2D42R816GB-A485-SF
  •  
  • $109.99 
OWC 8GB DDR4 3200MHz PC4-25600 CL22 1.2V 260pin Non-ECC SODIMM Memory RAM Compatible with Alienware M15 R5 R6
Quick View
OWC 8GB DDR4 3200MHz PC4-25600 CL22 1.2V 260pin Non-ECC SODIMM Memory RAM Compatible with Alienware M15 R5 R6
  • Voltage: 1.2V
  • Compatible System: Alienware M15 R5 Alienware M15 R6
  • CAS Latency: CL22
  • Part Number: 3S2D41R808GB
  • Model #: OWC3S2D41R808GB-A473-SF
  •  
  • $59.99 

System-specific memory has a significant effect on your device's performance. Memory is also called Random Access Memory (RAM), and selecting the correct type is important, as it needs to match the specifications of your device. The Double Data Rate (DDR) generation, for example, needs to match your motherboard. DDR 2 is what older computers use, and DDR 3 goes with motherboards created after 2007, with the latest motherboards being designed to work with DDR 4. Determine how much RAM you can install by checking your operating system. If you are using Windows®, it will vary between the 32-bit version, which can handle 4GB of RAM at most, and the 64-bit version, which can handle up to 3TB of RAM. Also check to see if the version is Pro or Home. When choosing system-specific RAM, first double-check the specifications of both your motherboard and your operating system.

Run Programs, Applications, and Games Efficiently With System-Specific Memory

Reduce latency and prevent programs from crashing due to overload with sufficient system-specific memory. Gamers need a minimum of 8GB of RAM, and creative professionals require at least 16GB to run programs that use a lot of processing power. RAM modules are available from as little as 128MB up to 64GB. The number of RAM modules you can purchase depends on how many Dual In-Line Memory Module (DIMM) slots your motherboard has. Bear in mind that smaller motherboards (mITX- Mini-ITX and mATX- Micro-ATX) only have two slots, whereas the larger ATX and Extended-ATX (eATX) models have four or more. Get around limited space issues by purchasing a RAM module with a higher amount of memory. DIMM is specifically designed for use as desktop RAM, as these modules fit into the available slots of a desktop computer.

Speed Up Your Laptop and Run More Applications at Once With RAM

Upgrade your laptop by increasing the amount of RAM. Small Outline Dual Inline Memory Module (SO-DIMM) options are the correct choice for laptop RAM. SO-DIMM slots accommodate the smaller and slimmer case of laptops. As with a desktop, check what your operating system and motherboard can handle. Use Unbuffered Non-Error Correction Code memory, abbreviated as unbuffered non-ECC registered RAM and also known as Static RAM (SRAM), for personal computers and laptops for work, entertainment, or gaming purposes. This type of RAM is faster, which is especially important for gamers and creative professionals.

Keep Your Server Processing and Data Safe With RAM

Because servers run constantly and process so much data, it is best to purchase dedicated server memory. Unlike desktop computers and laptops, servers require ECC registered RAM, also known as Dynamic Random Access Memory or DRAM. ECC registered memory finds errors and corrects them, which helps prevent data corruption without needing manual input. This lets your servers transfer data faster, keeps your data safe and places a smaller electrical load on your computer without requiring input from the user.

Bestselling System Specific Memory Reviews:

Anonymous
3/16/2026 6:03:37 PM
The memory is good

“ The memory is good, shipping was fast, and delivery was quick. ”

A-Tech 64GB Kit (2x32GB) RAM for Apple iMac (2019, 2020), Mac mini (Late 2018, Early 2020) | DDR4 2666MHz PC4-21300 SODIMM 260-Pin Memory Upgrade
Anonymous
2/6/2026 9:23:17 PM
Reliable SK Hynix-Based ECC Memory for Professional Workstations

“ Uses genuine SK Hynix memory chips - a top-tier manufacturer known for quality and reliability ”

NEMIX RAM 16GB (1X16GB) DDR5 4800MHZ PC5-38400 1Rx8 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT Compatible with Micron KSM48R40BS8KMM-16HMR
Langdon S.
12/13/2024 7:58:38 AM
Works great in iMac 2011 21.5" and Dell XPS 17 L702X!

“ It is dual-rank RAM. ”

Crucial 16GB (2 x 8GB) DDR3 1600 (PC3 12800) Unbuffered Memory for Mac Model CT2K8G3S160BM
Ej
4/11/2023 7:54:10 AM
For older laptop

“ The existing 4GB memory was causing too much hard disk paging. ”

Crucial 8GB Kit (2 x 4GB) DDR3L 1600 MT/s (PC3L-12800) SODIMM 204-Pin 1.35V Laptop Memory - CT2KIT51264BF160B
Anonymous
2/23/2023 7:38:14 AM
Very pleased

“ Show up in system info as two 8GB sticks for 16GB. ”

Crucial 16GB (2 x 8GB) DDR3 1600 (PC3 12800) Unbuffered Memory for Mac Model CT2K8G3S160BM