The 4GB DDR3 1066 MHz DIMM Memory Module from OWC features a total capacity of 4GB, a clock speed of 1066 MHz, a bus speed of PC-8500, and a 240-pin DIMM form factor. It operates using 1.5V, has 7-7-7-20 timings, a component configuration of 512M x 72, a module bandwidth of 8.5 GB/s, and is equipped with ECC technology. Additionally, this memory module is equipped with an Apple-specified thermal sensor, which ensures that the RAM maintains a safe thermal operating range.

Model ID: MacPro5.1

2.4 GHz

Model ID: MacPro5.1

2.8 GHz, 3.2 GHz, 3.33 GHz

Model ID: MacPro4.1

2.26 GHz, 2.66 GHz, 2.93 GHz

Model ID: MacPro4.1

2.66 GHz, 2.93 GHz, 3.33 GHz

Model ID: Xserve3.1

2.26 GHz, 2.66 GHz, 2.93 GHz

Model ID: Xserve3.1

2.26 GHz

Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Compatible with Intel / AMD Process based servers capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Related Questions and Answers

Q: 1. I was actually wondering if this RAM still works with the newly refreshed late 2019 5K IMac? From what I gather it should anyone know for sure?

A: Yes, this ram will work on the latest version of the 2019 5K Imac

Q: 2. Is it comaptible with Acer Predator Helios 300 Core i7 9th Gen???

A: Yes.

Q: 3. Is it compatible with iMac 5K which has been manufactured in 2016?

A: I purchased this memory from my new Apple 27 iMac with Retina 5K Display (Late 2015) and it works perfectly. This is the correct spec for the Retina 5K Mac.

Q: 4. What's the performance difference between this and the Crucial kit "CT2K16G4TFD8266" for almost double the price? The only difference I see is the more expensive one has "x8-Based Chips" "Error Correction (ECC)"

A: The more expensive memory listed is ECC RAM for servers and workstations with Xeon processors.

Q: 5. Why is this product/package prized so high or so differently? Say, with other OCW 32GB package? I'm talking about the OWC / Other World Computing 32GB DDR3 1867 MHz SO-DIMM Memory Kit (2 x 16GB, Late 2015 iMac Retina 5K) which is prized at $508, while the other package is just around $200.

A: What is the item code for the other 32GB kit that you are comparing this one to?

Q: 6. is it compatible with lenovo ideapad 330s?

A: Yes, this ram is compatible with the IdeaPad 330s.

Q: 7. will it work in Synology DS920+ ?

A: Yes, it is compatible.

Q: 8. Is this RAM still good for the late 2019 IMac that has recently been refreshed?

A: This RAM should work perfectly with the late 2019 iMac (27" only).

Q: 9. Will this RAM (32GB) work on the 5K iMac Late 2015?

A: Yes, this is for the iMac w/Retina 5K display (27 inch Late 2015)Model ID: iMac 17,1

Q: 10. Will this work in a Asus M5A78L-M/USB3 Motherboard?

A: From the limited specifications I can find on that motherboard, I believe the memory will work, but I cannot make any guarantee, as we have not tested this RAM with that motherboard.