The description that the memory is an ECC UDIMM helps to narrow down the selection from the multitude of options available.
The ECC function is usually chosen when security and stability are a priority. This is the case, for example, when multiple users access a common system or when a workstation with memory-intensive applications cannot tolerate a crash due to a DataBit error.
The ECC function ensures that a potential memory error in the RAM can be detected and corrected. This happens without interrupting or disturbing the current process. The user does not notice this and can continue working without interruption. A system crash is avoided, a reboot is unnecessary, and no information is lost.
So why doesn’t every computer system have ECC memory? The reason lies partly in the cost. An ECC memory requires 12% more memory cells to perform its function. The production numbers compared to UDIMM memory without ECC are significantly lower, resulting in the market price for ECC memory being about 20 – 30% higher than for UDIMM memory of the same capacity. Additionally, the overall system takes more time for the ECC check in memory due to the extra clock cycles required. The overall performance of the system is slightly reduced by using the ECC function.
The information that an ECC UDIMM is required is just one of many hints to determine the right memory for your system. These memory types are available as:
| Technology | JEDEC Standard | Speeds |
|---|---|---|
| SDRAM ECC UDIMM | PC100E, PC133E | 100MHz, 133MHz |
| DDR1 ECC UDIMM | PC2100E, PC2700E, PC3200E | 266MHz, 333MHz, 400MHz |
| DDR2 ECC UDIMM | PC2-3200E, PC2-4200E, PC2-5300E, PC2-6400E | 400MHz, 533MHz, 667MHz, 800MHz |
| DDR3 ECC UDIMM | PC3-6400E, PC3-8500E, PC3-1066E, PC3-12800E | 800MHz, 1066MHz, 1333MHz, 1600MHz |
| DDR4 ECC UDIMM | PC4-17000E | 2133MHz |
The DRAM structure is designed, with few exceptions, for “x8 bit” wide DRAMs. Therefore, ECC UDIMM memory usually comes as 1Rx8 or 2Rx8 variants (R = number of memory ranks). Furthermore, the memory is available not only as ECC UDIMM but also with the registered function as ECC RDIMM. The various voltages that are possible in different technologies are also possible with ECC memory. For this reason, we offer ECC UDIMM memory specifically for devices so that you can make a safe choice to select the right ECC memory for your system… for memory search via the system designation.
DDR1 ECC UDIMM Memory 184Pin
DDR2 ECC UDIMM Memory 240Pin
DDR3 ECC UDIMM Memory 240Pin
DDR4 ECC UDIMM Memory 288Pin
