Installed these in an imac (21.5-inch, 2017) model identifier: imac18,1 and they didn’t work (black screen) can you tell me which chips will work?

Go to Apple's web site and in the support section you can find a spreadsheet that will match up your computer with the proper memory chip(s).

I'm confused, are these 2-8gb modules or just one 16gb module?

This is a single 16GB DDR4 2400Mhz SODIMM RAM. If you need to find the right memory for your system, please feel free to contact us via Amazon messages with detailed information about your system. Best regards, MY Timetec International Inc.

Is it compatible with a lenovo thinkpad t470s (4Gb soldered)?

Yes, it is compatible with your Yes, it is compatible with your thinkpad t470s. If you have any further questions, please feel free to contact support@timetecinc.com. Thank you, I.F. Timetec Inc.

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- 8GB RAM Compatible with Apple 2017 iMac (27-inch 5K Retina, 21.5-inch 4K or Non-Retina) DDR4 2400MHz PC4-19200 CL17 SODIMM Mac Memory Upgrade for 18,1/18,2/18,3

- 8GB RAM Compatible with Apple 2017 iMac (27-inch 5K Retina, 21.5-inch 4K or Non-Retina) DDR4 2400MHz PC4-19200 CL17 SODIMM Mac Memory Upgrade for 18,1/18,2/18,3

Product ID: 90311204

⚡2400MHz speed

💻8GB DDR4 RAM

🔒Lifetime warranty

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€ 97.74

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate Your iMac Experience!

UPGRADE YOUR I MAC - Transform your 2017 iMac with a powerful 8GB DDR4 RAM boost!
TAILORED FOR APPLE - Perfectly compatible with 27-inch Retina 5K and 21.5-inch Retina 4K models.
UNMATCHED RELIABILITY - Enjoy peace of mind with a guaranteed lifetime warranty.
LIGHTNING FAST PERFORMANCE - Experience seamless multitasking with 2400MHz speed.
EXPERT SUPPORT AT YOUR FINGERTIPS - Access free technical support from the USA whenever you need it.

The Timetec 8GB DDR4 RAM upgrade is designed specifically for 2017 iMac models, enhancing performance with lightning-fast 2400MHz speed. This unbuffered, non-ECC memory module is compatible with both Retina and Non-Retina displays, ensuring a seamless upgrade experience. With a lifetime warranty and dedicated technical support, it's the perfect choice for professionals seeking reliability and efficiency.

Specifications

ASIN	B07DS9YJKV
Additional Features	Lightweight
Best Sellers Rank	#824 in Computer Memory
Brand	Timetec
Column Address Strobe Latency	17
Compatible Devices	Desktop
Computer Memory Size	8 GB
Customer Reviews	4.5 out of 5 stars 121 Reviews
Data Transfer Rate	2400 MHz
Form Factor	SO-DIMM
Item Weight	13.61 g
Manufacturer	Timetec
Memory Form Factor	UDIMM
Memory Generation	DDR4
Memory Speed	2400 MHz
Mfr Part Number	78
Model Name	DDR4 2400MHz PC4-19200 CL17
Model Number	78
Number of Pins	260
RAM Memory Technology	DDR4
RAM Size	8 GB
Special Feature	Lightweight
UPC	765441338913
Unit Count	1.0 Count
Voltage	1.2 Volts

Reviews

W**S

saved me a small fortune!!!

Saved me $4,000!!!! What a difference this made! I have a 2017 27" 5K Mac it had 8gb of ram and was a doggg! I love the giant display that would cost me a fortune to replace. I added this 16gb to it and now everything loads super fast... google chrome, adobe suite, etc..... Thinking of adding another one just for poops and giggles because it made such a big difference. So happy I did this instead of a new computer!!!

10.01.2026

C**.

Excelente compra

Funciono súper bien y súper fácil de poner en mi IMac 2017, llego en menos de una semana

4.06.2026

G**B

Very good

Works perfect on iMac 27 inch 5k 2017

8.02.2024

S**O

It works but you may wind cheaper options

It works well, but not clear why costs 13 dollars more than the regular “not for mac” memory drive they sell. Its the same.

13.10.2021

L**R

Perfect for iMac

This is easy to install and once installed it has worked well and sped up the iMac.

10.07.2023

M**L

Premium Ram

Since installing my computer can now take heavy loads. A major upgrade for my computer. If you do heavy lifting like video editing or music you’ll need to make sure your computer has enough ram to run your program and This is a Great Brand and also a Great Price..

29.08.2023

D**.

Functions well but costs a lot to install

If I'd known what a bear is was to install this in a 2017 small iMac, I might have passed. I had to pay a hundred bucks over my mac guy's estimate to compensate him for the extra time. But that's the fault of Apple's design.

14.03.2024

E**R

Funciona perfecto

Necesitaba darle un nuevo empujón a mi iMac. Apenas recibí mi pedido agregué por primera vez una RAM a un equipo de Apple. No me funcionó, la pantalla se quedaba en negro. Volví a instalar de nuevo y ahora sí funcionó perfecto al poner primero la de 8GB y luego las 2 de 4GB.

26.11.2018

A**O

Excelente calidad

Le quedaron perfecto a mi Mac. Las especificaciones fueron las correctas. Muy buen producto.

8.05.2024

N**N

Speedy Delivery, quality product

Speedy speedy processing and delivery, works without a hitch on my 2017 iMac that initially only had a measly 8gb ram and kept crashing trying to process 4K video. Now works so smooth and fast. All my crashing issues now solved. THANK YOU 🙏🌈

31.08.2020

A**R

installation was simple and quick!

Upgraded the memory in my iMac 2017. Just had to disconnect the power cable, push a release button to open the slot and install the memory. Booted up right away with no issues.

14.09.2023

A**S

NO LO COMPREN!

Compre 2 de 8gb c/u y ESTROPERON mi iMac ...al día de hoy jamas volvió a prender y sigue en servicio. Por desgracia sali de la ciudad al siguiente día y no tuve el tiempo de regresarlo por mi dinero (y venció el periodo) ... pésima experiencia, no lo compren!!! … no comprendo como Amazon sigue teniéndolo en catálogo YO PERDÍ MÁS DE 2MIL DOLARES en equipo por este pésimo proveedor acabo de visitar la página y veo que sigue ofreciéndola . Valoren su equipo y busquen otras opciones.

7.12.2021

N**A

Good product👍

Easy to install all A1 highly recommended 🎉

26.06.2022

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€ 97.74

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

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