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OWC 16GB (2 x 8GB) PC19200 DDR4 2400MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Mid 2017) and Compatible PCs (OWC2400DDR4S16P)

31.99

OWC 16GB (2 x 8GB) PC19200 DDR4 2400MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Mid 2017) and Compatible PCs (OWC2400DDR4S16P)

4.6

Highest ranking 101

13 comments

$31.99

· OWC 16.0GB UPGRADE: Consists of Two 8GB PC19200 DDR4 2400MHz SO-DIMM Memory, 260-Pin, 1.2 Volts, Non-registered, Non-ECC, Fully compliant with JEDEC specifications, ROHS compliant, warranty safe upgrade; Backed by OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program · COMPATIBLE WITH: 2017 iMac: iMac w/Retina 5K display (27 inch mid 2017) Model ID: iMac18,3 (3.4GHz & 3.5GHz & 3.8GHz Core i5 & 4.2GHz Core i7) · COMPATIBLE WITH: 2017 iMac 21.5-inch: Model ID: iMac18,2 iMac w/Retina 4K display, 21.5-inch Mid 2017, (3.0GHz & 3.4GHz Core i5 & 3.6GHz Core i7); Model ID: iMac18,1 iMac Mid 2017 2.3GHz Core i5 · COMPATIBLE WITH: Select PC Laptop, PC Notebook, All in One Computers, NAS, Synology, POS systems · INCREASED PERFORMANCE: Memory Upgrades are the Most Effective and Easy Way to Boost the Performance in Your Mac Pro · COMPATIBLE PART NUMBERS: CT8G4S24AM, CT2K8G4S24AM, KVR24S17S8/8, CT8G4SFS824A, CT2K8G4SFS824A, KCP424SS8/8, HMA81GS6AFR8N-UH, M471A1K43BB1-CRC, M471A1K43CB1-CRC, M474A1G43DB1‐CRC, HMA81GS6AFR8N‐UH · INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing

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Lee RutterReviewed in the United States on November 20, 2024

I have a mid-2017 iMac 27 inch Retina with the 4.2 GHz Intel i7 with 2TB Fusion Drive INITIAL PROBLEMS (All Resolved): FiIRST PROBLEM: Replacing the 32gb memory with 64gb, the Mac initially didn't boot.I had to put my old memory back, boot it up, then try different configurations where I would keep original 16gb memory and place new 32gb making a total of 48gb. First time didn't work. Put the two sticks aside, and put the other two sticks in. Success! I now had 48gb. But, the system was slow as snot and took a long time after logging in. Now, I shut it down, removed original memory and moved 32gb upgraded memory to position 1 and 2 and put the sticks that weren't working in position 3 and 4. Finally, booted up! 64gb memory! SECOND PROBLEM: As mentioned everything was slow. I now had 64gb memory, but everything was slow but not as slow. Once I had mouse movement, I immediately removed the cache files in the library folder. Then I started opening up the apps that I use the most, first. With Fusion Drive, it uses a large cache to make opening apps a lot faster. The Fusion Drive is a mix of Flash or SSD and HDD. After using it for 4 hours and rebooting once everything became quite snappy and by the second day, I can finally see the payoff of having 64gb of memory. I have experienced issues with memory not allowing computer to boot up before, even in Windows. Sometimes memory sticks just have to be put in a specific order and no one knows that until they try. Most of the time, no issue. The GOOD So far, I am no longer needing a swap file. The responsiveness of apps and loading data is noticeably faster. This is a cheap upgrade that adds immediate benefits and well worth the money. More memory gives the system more headroom to work with. I was considering buying an M4 MacMini to replace this 2017 iMac because I felt it was important to have the speed and memory to tackle whatever tasks I need to plow through. Adding the memory changed that decision and helped to extend the life of this machine for another few years. I would rather save the money and use what I have. If you are on the fence, just do the upgrade. You will notice a difference and it will give your Mac new life. I only feel bad that I didn't make this choice years ago, or when I first bought the Mac. Of course, back then, the cost was double than what it is now.

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JuanReviewed in the United States on May 21, 2025

Justo lo que necesitaba, quiero resaltar lo rápido que llegó este producto a Colombia. Excelente!

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RyanReviewed in the United States on January 24, 2025

This was a direct install for a 2017 iMAC 27" (18,3) computer. I had 8GB installed from the factory and i've noticed that the computer has been going slower each year. When i ran the activity monitor on the OS, i saw that the computer was doing memory swapping (having to actively "put data back to the HD to free up space to run current processes) the system said that 6 of the 8 GB were always being consumed. This is an inexpensive upgrade. it still starts up slow (because it still have to pull data from the HD during Startup) but now once its up and running, all my programs perform faster. the system shows that im using about 10GB constantly so it still has plenty of room to keep lots of applications running without having to swap to the slower IO's of a hard drive.

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Edgar HamielReviewed in the United States on April 1, 2025

Worked just as advertised ...

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MrFre3zeReviewed in the United States on March 8, 2025

Great price on a great product. iMac recognized the modules and everything works wonderfully. Highly recommended.

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Oswaldo MartinezReviewed in the United States on March 6, 2025

Llegó a tiempo y en excelente estado.

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MMReviewed in the United States on July 19, 2022

Since I installed 2 more rams of memory in my iMac (Retina 5K, 27-inch, 2017), it now periodically just crashes. I have the error report but it means nothing to me. I assume my issue is related to this installation. Would anyone have any suggestions? panic(cpu 1 caller 0xffffff801d7198aa): [iokit.IODMACommand]: element modified after free (off:24, val:0x0000010000000000, sz:120, ptr:0xffffffa4c5c14e10) 24: 0x0000010000000000 Panicked task 0xffffffa991ae79f0: 7 threads: pid 2319: com.apple.WebKit Backtrace (CPU 1), panicked thread: 0xffffffae57bf2000, Frame : Return Address 0xffffff80c9a3abd0 : 0xffffff801ce81c8d 0xffffff80c9a3ac20 : 0xffffff801cfe1596 0xffffff80c9a3ac60 : 0xffffff801cfd0963 0xffffff80c9a3acb0 : 0xffffff801ce21a70 0xffffff80c9a3acd0 : 0xffffff801ce8205d 0xffffff80c9a3adf0 : 0xffffff801ce81816 0xffffff80c9a3ae50 : 0xffffff801d715163 0xffffff80c9a3af40 : 0xffffff801d7198aa 0xffffff80c9a3b3b0 : 0xffffff801ceeb8a9 0xffffff80c9a3b410 : 0xffffff801d64f497 0xffffff80c9a3b440 : 0xffffff801d64cc51 0xffffff80c9a3b4a0 : 0xffffff7fb5dea857 0xffffff80c9a3b4c0 : 0xffffff7fb5dfc9fb 0xffffff80c9a3b510 : 0xffffff7fb5da92bd 0xffffff80c9a3b530 : 0xffffff7fb5dfa00b 0xffffff80c9a3b550 : 0xffffff7f9dc66f3f 0xffffff80c9a3b5b0 : 0xffffff7f9dc30d31 0xffffff80c9a3b5e0 : 0xffffff7f9dc434ac 0xffffff80c9a3b630 : 0xffffff7f9dc437e5 0xffffff80c9a3b6d0 : 0xffffff7fb5ded368 0xffffff80c9a3b710 : 0xffffff7fb5ded719 0xffffff80c9a3b9b0 : 0xffffff7f9dc34252 0xffffff80c9a3b9e0 : 0xffffff7fb5dee8f1 0xffffff80c9a3ba70 : 0xffffff7fb5dec94b 0xffffff80c9a3bad0 : 0xffffff7fb5dec741 0xffffff80c9a3bb20 : 0xffffff7fb5deb81d 0xffffff80c9a3bb60 : 0xffffff801d683a8c 0xffffff80c9a3bcc0 : 0xffffff801cf872e6 0xffffff80c9a3bdd0 : 0xffffff801ce5c9ab 0xffffff80c9a3be60 : 0xffffff801ce731f9 0xffffff80c9a3bef0 : 0xffffff801cfb35aa 0xffffff80c9a3bfa0 : 0xffffff801ce22256 Kernel Extensions in backtrace: com.apple.iokit.IOAcceleratorFamily2(462.8)[F0D1B5AF-356A-3F86-8829-8F00218602CB]@0xffffff7fb5da6000->0xffffff7fb5e10fff dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[2B96E04B-E2A5-3296-AF14-6A766880A652]@0xffffff801e5a1000->0xffffff801e5c2fff dependency: com.apple.iokit.IOGraphicsFamily(597)[BBEE13AB-2291-37D9-AAE4-9E565E8950A5]@0xffffff7fb5f3f000->0xffffff7fb5f6dfff dependency: com.apple.iokit.IOPCIFamily(2.9)[654ABF9D-EB24-3B64-AB1C-EC2AC8357192]@0xffffff801fa24000->0xffffff801fa4ffff dependency: com.apple.iokit.IOReportFamily(47)[5578189C-7C1D-3158-B357-F8D6A216DCE1]@0xffffff801fa61000->0xffffff801fa63fff dependency: com.apple.iokit.IOSurface(302.14)[F0BF8EFA-AA35-37B5-B3AB-A8BCF5E62024]@0xffffff801fb94000->0xffffff801fbb0fff com.apple.kext.AMDRadeonX4000(4.0.8)[B7BDCB57-0EF9-37E9-B724-29D96491A4FB]@0xffffff7f9dc2b000->0xffffff7f9e07dfff dependency: com.apple.iokit.IOAcceleratorFamily2(462.8)[F0D1B5AF-356A-3F86-8829-8F00218602CB]@0xffffff7fb5da6000->0xffffff7fb5e10fff dependency: com.apple.iokit.IOGraphicsFamily(597)[BBEE13AB-2291-37D9-AAE4-9E565E8950A5]@0xffffff7fb5f3f000->0xffffff7fb5f6dfff dependency: com.apple.iokit.IOPCIFamily(2.9)[654ABF9D-EB24-3B64-AB1C-EC2AC8357192]@0xffffff801fa24000->0xffffff801fa4ffff dependency: com.apple.iokit.IOSurface(302.14)[F0BF8EFA-AA35-37B5-B3AB-A8BCF5E62024]@0xffffff801fb94000->0xffffff801fbb0fff Process name corresponding to current thread (0xffffffae57bf2000): com.apple.WebKit.WebContent Mac OS version: 21F79 Kernel version: Darwin Kernel Version 21.5.0: Tue Apr 26 21:08:22 PDT 2022; root:xnu-8020.121.3~4/RELEASE_X86_64 Kernel UUID: 3C587984-4004-3C76-8ADF-997822977184 KernelCache slide: 0x000000001cc00000 KernelCache base: 0xffffff801ce00000 Kernel slide: 0x000000001cc10000 Kernel text base: 0xffffff801ce10000 __HIB text base: 0xffffff801cd00000 System model name: iMac18,3 (Mac-BE088AF8C5EB4FA2) System shutdown begun: NO Panic diags file available: YES (0x0) Hibernation exit count: 0 System uptime in nanoseconds: 340686258085148 Last Sleep: absolute base_tsc base_nano Uptime : 0x000135da33649f64 Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000 Wake : 0x0000000000000000 0x000000107080ddae 0x0000000000000000 Compressor Info: 5% of compressed pages limit (OK) and 18% of segments limit (OK) with 16 swapfiles and OK swap space Zone info: Zone map: 0xffffff99901f0000 - 0xffffffb9901f0000 . PGZ : 0xffffff99901f0000 - 0xffffff99951f1000 . VM : 0xffffff99951f1000 - 0xffffff9e612bd000 . RO : 0xffffff9e612bd000 - 0xffffff9ffa856000 . GEN0 : 0xffffff9ffa856000 - 0xffffffa4c6922000 . GEN1 : 0xffffffa4c6922000 - 0xffffffa9929ef000 . GEN2 : 0xffffffa9929ef000 - 0xffffffae5eabc000 . GEN3 : 0xffffffae5eabc000 - 0xffffffb32ab89000 . DATA : 0xffffffb32ab89000 - 0xffffffb9901f0000 Metadata: 0xffffff805b6df000 - 0xffffff807b6df000 Bitmaps : 0xffffff807b6df000 - 0xffffff808a6df000 last started kext at 217245416091: @filesystems.smbfs 4.0 (addr 0xffffff7fb6338000, size 483328) last stopped kext at 335917090967: >!AThunderboltEDMSink 5.0.3 (addr 0xffffff7fb5bc7000, size 32768) loaded kexts: @filesystems.smbfs 4.0 >!ATopCaseHIDEventDriver 5450.8 >AudioAUUC 1.70 >!APlatformEnabler 2.7.0d0 >X86PlatformShim 1.0.0 >AGPM 129 >!AUpstreamUserClient 3.6.9 @kext.AMDFramebuffer 4.0.8 @filesystems.autofs 3.0 @kext.AMDRadeonX4000 4.0.8 >!AHDA 340.2 @kext.AMDRadeonServiceManager 4.0.8 >!AGraphicsDevicePolicy 6.5.7 >eficheck 1 >!A!IKBLGraphics 18.0.7 @AGDCPluginDisplayMetrics 6.5.7 >!A!IKBLGraphicsFramebuffer 18.0.7 >pmtelemetry 1 |IOUserEthernet 1.0.1 >usb.!UUserHCI 1 >!AHV 1 >!ADiskImages2 126.100.13 @kext.AMD9500!C 4.0.8 >!A!ISlowAdaptiveClocking 4.0.0 >!ASMCLMU 212 >!A!IPCHPMC 2.0.1 >!AGFXHDA 140.3 >!AThunderboltIP 4.0.3 >!AMCCSControl 1.16 >!AFileSystemDriver 3.0.1 @filesystems.tmpfs 1 @filesystems.lifs 1 @filesystems.hfs.kext 583.100.10 @BootCache 40 @!AFSCompression.!AFSCompressionTypeZlib 1.0.0 @!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1 @filesystems.apfs 1934.121.2 >AirPort.BrcmNIC 1400.1.1 >!ASDXC 3.2.1 |!ABCM5701Ethernet 11.0.0 >!AAHCIPort 351.100.4 @private.KextAudit 1.0 >!AACPIButtons 6.1 >!ARTC 2.0.1 >!ASMBIOS 2.1 >!AACPIEC 6.1 >!AAPIC 1.7 @!ASystemPolicy 2.0.0 @nke.applicationfirewall 402 |IOKitRegistryCompatibility 1 |EndpointSecurity 1 @Dont_Steal_Mac_OS_X 7.0.0 @kec.!AEncryptedArchive 1 >driverkit.serial 6.0.0 |IOSerial!F 11 >!AHIDKeyboard 228.2 >!AMultitouchDriver 5450.14 >!AInputDeviceSupport 5450.4 >!AHS!BDriver 5450.8 >IO!BHIDDriver 9.0.0 @kext.triggers 1.0 @kext.AMDRadeonX4200HWLibs 1.0 >DspFuncLib 340.2 @kext.OSvKernDSPLib 529 @kext.AMDRadeonX4000HWServices 4.0.8 >!AGraphicsControl 6.5.7 >!ASMBusPCI 1.0.14d1 |IOAccelerator!F2 462.8 |IO!BSerialManager 9.0.0 |IO!BPacketLogger 9.0.0 |IO!BHost!CUSBTransport 9.0.0 |IO!BHost!CUARTTransport 9.0.0 |IO!BHost!CTransport 9.0.0 >IO!BHost!CPCIeTransport 9.0.0 |IOAVB!F 1040.6 @plugin.IOgPTPPlugin 1040.3 |IOEthernetAVB!C 1.1.0 |CSR!BHost!CUSBTransport 9.0.0 |Broadcom!BHost!CUSBTransport 9.0.0 |Broadcom!B20703USBTransport 9.0.0 >!AIPAppender 1.0 @kext.AMDSupport 4.0.8 @!AGPUWrangler 6.5.7 |IOSlowAdaptiveClocking!F 1.0.0 @!AGraphicsDeviceControl 6.5.7 >X86PlatformPlugin 1.0.0 >IOPlatformPlugin!F 6.0.0d8 >!AHDA!C 340.2 |IOHDA!F 340.2 |IONDRVSupport 597 |IOAudio!F 340.2 @vecLib.kext 1.2.0 >!AThunderboltDPOutAdapter 8.5.1 |IOGraphics!F 597 >!ASMBus!C 1.0.18d1 |IOAHCIBlock!S 333.100.3 >usb.IOUSBHostHIDDevice 1.2 >usb.cdc 5.0.0 >usb.networking 5.0.0 >usb.!UHostCompositeDevice 1.2 >!AThunderboltPCIUpAdapter 4.1.1 >!AThunderboltPCIDownAdapter 4.1.1 >!AThunderboltDPInAdapter 8.5.1 >!AThunderboltDPAdapter!F 8.5.1 >!AHPM 3.4.4 >!A!ILpssI2C!C 3.0.60 >!A!ILpssDmac 3.0.60 >!ABSDKextStarter 3 |IOSurface 302.14 @filesystems.hfs.encodings.kext 1 >!AXsanScheme 3 >!AThunderboltNHI 7.2.81 |IOThunderbolt!F 9.3.3 |IO80211!FLegacy 1200.12.2b1 |IOSkywalk!F 1.0 >corecapture 1.0.4 |IONVMe!F 2.1.0 >mDNSOffloadUserClient 1.0.1b8 >!A!ILpssI2C 3.0.60 >!A!ILpssGspi 3.0.60 >usb.!UXHCIPCI 1.2 >usb.!UXHCI 1.2 |IOAHCI!F 297 >usb.!UHostPacketFilter 1.0 |IOUSB!F 900.4.2 >!AEFINVRAM 2.1 >!AEFIRuntime 2.1 |IOSMBus!F 1.1 |IOHID!F 2.0.0 |IOTimeSync!F 1040.3 |IONetworking!F 3.4 >DiskImages 493.0.0 |IO!B!F 9.0.0 |IOReport!F 47 $quarantine 4 $sandbox 300.0 @kext.!AMatch 1.0.0d1 |CoreAnalytics!F 1 >!ASSE 1.0 >!AKeyStore 2 >!UTDM 533.120.2 |IOUSBMass!SDriver 210.120.3 |IOSCSIBlockCommandsDevice 456.121.3 |IO!S!F 2.1 |IOSCSIArchitectureModel!F 456.121.3 >!AMobileFileIntegrity 1.0.5 $!AImage4 4.2.0 @kext.CoreTrust 1 >!AFDEKeyStore 28.30 >!AEffaceable!S 1.0 >!ACredentialManager 1.0 >KernelRelayHost 1 |IOUSBHost!F 1.2 >!UHostMergeProperties 1.2 >usb.!UCommon 1.0 >!ABusPower!C 1.0 >!ASEPManager 1.0.1 >IOSlaveProcessor 1 >!AACPIPlatform 6.1 >!ASMC 3.1.9 |IOPCI!F 2.9 |IOACPI!F 1.4 >watchdog 1 @kec.pthread 1 @kec.Libm 1 @kec.corecrypto 12.0

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W. ParkReviewed in the United States on December 23, 2024

Works without a hitch in a Thinkpad T580 bought used with minimal 2018 specs. Now can have near infinite browser tabs, multiple programs, and processes with little fuss. 64gB a bit of overkill for Linux, but the Windows appreciate the extra room.

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Emanuel PicazzoReviewed in Mexico on June 10, 2020

Excelente producto. Lo recomiendo ampliamente. Tengo un iMac de 27 pulgadas 5k, 2017. Y es totalmente compatible. Funciona sin problema con las memorias que ya traía de fábrica el iMac, por lo que me quedo un total de 40 gb de ram. Cómprenla, vale la pena. Además el envío tarda mucho menos de lo indicado. A mi me llegó súper rápido.

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Alessandro ReffoReviewed in Italy on December 30, 2024

Installate facilmente e riconosciute immediatamente dal sistema

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TomtypeReviewed in the United Kingdom on July 29, 2020

Superb. Fitted easily and working so well I purchased another 16gb. Previously I bought Crucial from Amazon but not sure they sent me the right memory as although it fitted ok I kept getting start-up problems. Amazon quickly processed my return and credited my account.

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SravanReviewed in India on July 23, 2020

Good

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Jos VanbaelenReviewed in Belgium on December 20, 2024

Eenvoudig geïnstalleerd en werkt onmiddellijk perfekt.