Cisco 16GB DDR3-1600 RDIMM PC3-12800R Dual Rank x4 Replacement

Product Overview

Dramatically improve performance and handle larger user and application workloads in your mission critical workstations and servers with this 16GB (1x 16GB) DDR4 1600 MT/s 288-pin RDIMM RAM module. This Dual rank, x4 configuration RAM module is for use in DDR5 Cisco systems and operates at 1600 MT/s with an overall transfer rate of PC3-12800R.

This RAM module also operates at a standard voltage of 1.1V and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing experience.

Compatibility

You can verify the compatibility of this RAM module in a number of ways:

• Use the RamCity Finder to see all guaranteed compatible RAM upgrades for your brand and model system or motherboard
• Search online to see if this product is on the QVL (Qualified Vendor List) for your system or motherboard
• Contact one of our Upgrade Evangelists for an expert opinion

Memory backwards compatibility in DDR4 and DDR5

This information comes from Micron, one of the largest memory manufacturers in the world. 

Did you know that within the same memory technology (DDR4/DDR5), higher speed memory can downclock when system specifications only support lower speed grades? For example: DDR5 5,200MT/s memory can downclock if system specification only supports DDR5 4,800MT/s. Similarly, DDR5 5,600MT/s memory can downclock if system specification only supports DDR5 5,200 or 4,800MT/s.

What is more important in compatibility is no longer speed. It is how the module is made. Please call our sales team to check your server compatibility.

Why is the speed of this RAM module shown as 1600MT/s instead of  1600Mhz?

When it comes to measuring DDR RAM speed, MT/s and MHz are used interchangeably, which is not actually correct.

DDR stands for double data rate which means data is transfers on both the rising and falling edges of the clock signal. Meaning that the transfer rate is roughly twice the speed of the I/O bus clock. This RAM module runs at 800 MHz per second, but the effective rate is 1600 megatransfers per second (MT/s) because there are 800 million rising edges per second and 800 million falling edges per second of a clock signal running at 800 MHz.

Save 25% and more over buying a pre-configured server or workstation

Memory and storage account for over half of a typical server’s bill of materials (BOM) cost. Your CTO wants to keep a lid on spending but you need hardware that delivers the performance that your users need. By purchasing servers or workstations with minimal preinstalled components and then installing Crucial server memory, you can save 25% or more on your RAM costs – and maintain your OEM server warranties.

But don't I need to buy RAM and Storage components from my OEM to maintain the warranty?

Similar to how you can upgrade a system’s preinstalled processor or graphics card and choose whichever brand you want, you can also do the same with memory and storage. Laws in Australia, U.S. and all over the world protect comsumers and businesses so that you can swap out manufacturer pre-installed components for more cost-effective third-party components and still retain your product’s warranty. In practical terms, this means you can upgrade to Crucial brand memory without voiding your system’s original warranty. Don’t just take our word for it though, here’s what the manufacturer warranties say:

• HP Warranty Statement
• Dell Warranty Statement
• IBM/Lenovo Warranty Statement
• Apple Warranty Statement
• Cisco Warranty Statement