RDRAM® Frequently Asked Questions
Q: What is ECC?
A: ECC stands for Error Correction Code. This is a function for capable for correcting errors while checking for data errors in memory.
Correctly, ECC is " send data" that includes redundant bits for capable for detecting the existence of errors that occur during transfer at the side that receives the data, and it is capable for correcting back the data to the original correct data based on giving rules.
Q: Can I mix RIMM modules of different frequencies, or ECC/non-ECC into my system?
A: When mixing module frequency or error-correction code (ECC), most RDRAM systems will default to lowest frequency among the inserted modules. In addition, if any of the modules do not support ECC, then most system disables the ECC function.
Q: Can I install a PC800 RIMM in my system that already has a PC1066 RIMM module installed?
A: You can mix speed grades of RIMMS in most systems. However the system will run at the lowest speed grade of RIMM module installed. So for this instance your memory sub system would only run at 800 Mhz.
Q: Can I mix RIMM modules with different memory bit densities in the same system?
A: When mixing module frequency or error-correction code (ECC), most RDRAM systems will default to lowest frequency among the inserted modules. In addition, if any of the modules do not support ECC, then the system will usually disable the ECC function. Refer to the adding in pairs answer above.
Q: What is the difference between RDRAM™, DDR, and SDRAM memories?
A: RDRAM is used in the highest-performance PC systems. RDRAM memory operates at high-frequency for increased throughput from each component. Current mainstream RDRAM memory operates at transfer speeds of 1200MHz. DDR is targeted towards mainstream applications and typically operate at transfer speeds of 400MHz, and SDRAM is used in low-performance systems and operate at transfer speeds of 133MHz.
RDRAM is performance memory for users seeking to the highest performance from their PC RDRAM-enabled PCs excel at graphics, multimedia, CAD, content creation, and office applications.
Q: Would my applications benefit from RDRAM?
A: RDRAM-enabled computers offers the highest performance in graphics, multimedia, gaming CAD, content creation applications.
Q: Which is the difference in memory bandwidth of RDRAM, DDR, SDRAM?
A: On memory bandwidth:
1200MHz RIMM modules delivers 4.8 Gbyte per second
DDR400 modules: 3.2Gbyte per second
SDRAM PC133 modules: 1.1 Gbyte per second