# Dell Memory Upgrade - 8GB - 1Rx8 DDR4 RDIMM 2666MHz

Dell Part A9781927

Random Access Memory (RAM) is a type of hardware that your computer uses to store information. Adding memory is one of the most cost-effective ways to improve your computer's performance.

## Media

### Why should I buy a Dell Upgrades over a third-party part?

### Tested and Verified Tier-1 OEM-Grade Parts

Ensure compatibility with Dell servers, storage and networking.

### Ease of Installation

Save time with Dell Upgrades that are shipped as kits with the necessary hardware and firmware.

### Secure Supply Chain Focus

Protect system data and integrity with parts sourced from a secure supply chain.

### Dell Tech Support and Warranties

Preserve Dell technical support and warranties—which do not support systems with third-party upgrades.

### Compatibility

This product is compatible with the following systems:

- Precision Workstation R7920 XL
- PowerEdge XR2
- Precision Workstation T5820 XL
- PowerEdge T430
- Precision Workstation T7820
- PowerEdge FC630
- Precision Workstation R7920
- PowerEdge C4140
- PowerEdge R740
- PowerEdge R840
- PowerEdge T640
- PowerEdge MX740C
- PowerEdge R940
- PowerEdge R440
- PowerEdge M640
- Precision Workstation T5810 XL
- PowerEdge R640
- PowerVault NX3240
- Precision Workstation T5810
- PowerEdge R6415
- PowerEdge R630
- PowerEdge R530
- PowerEdge T440
- PowerEdge M640 VRTX
- PowerEdge R430
- PowerEdge R940xa
- PowerEdge MX840C
- PowerEdge R730
- PowerEdge M830
- PowerEdge T630
- PowerEdge C6420
- PowerEdge R930
- PowerEdge R740XD
- Precision Workstation T5820
- PowerEdge R7415
- PowerEdge FC430
- PowerEdge FC830
- PowerEdge R540
- PowerEdge R730XD
- Poweredge R830
- Precision Workstation T7920
- PowerEdge R740xd2
- Precision Workstation T7920 XL
- PowerEdge C4130
- PowerEdge R7425
- PowerEdge M630
- PowerEdge FC640
- Precision Workstation T7820 XL

### Memory DIMM Types

### With more memory, the faster that data and instructions can be read, written, and performed by the server.

There are three types of memory DIMMS for servers available. These DIMM types cannot be mixed in a single system, you must select the type of DIMM appropriate for your workload at the type of purchase.

- Unbuffered DIMM: UDIMM, an unbuffered, low density, low-latency DIMM that doesn't include a register or buffer chip. UDIMMs are generally used in applications requiring the lowest possible latency.
- Registered DIMM: RDIMM, a registered DIMM that provides high signal integrity -- performing parity checking to detect improper addresses or commands -- and increased performance for heavy workloads.
- Load reduced DIMMs: LRDIMM, uses a buffer to reduce memory loading to a single load on all DDR signals, allowing for greater density.

### Memory Tests

- Burn-in: Powered stress testing (i.e. increased temperature) to remove weak components.
- Component Test: Memory vendor-specific diagnostic tests performed at DRAM component level to ensure functionality.
- Module Test: Memory vendor-specific diagnostic tests performed at DIMM level to ensure functionality (with all DRAM components already mounted on DIMM PCB).