Hi all,
I'm a bit confused...
I have just bought two additional RAM modules for my desktop computer so now all of the four available slots are occupied. Each module is 2GB.
Before buying I checked my old RAM. According to Speccy they are both DDR2 PC2-8900. Then Speccy lists some JEDEC info:
#3: 555,6 MHz, CL6
#2: 400 MHz, CL5
#1: 333,3 MHz, CL4
Alright, so I thought that if I bought some 800 MHz CL5 mermory, everything would be great. The JEDEC info for the new RAM modules is as follows:
#3: 400 MHz, CL5
#2: 266,7 MHz, CL4
#2: 200 MHz, CL3
So, now the two new modules are running at 400 MHz, CL5 - I understand that with DDR2 RAM the effective frequency is the double so I guess that is OK.
The old modules are running at 555,6 MHz, CL6. That would be 1111,2 MHz when doubled.
I do not get it; why do the old modules not run at 400MHz, CL5? Would that not result in better performance?
Thanks in advance.
Mathias Brandt.
I'm a bit confused...
I have just bought two additional RAM modules for my desktop computer so now all of the four available slots are occupied. Each module is 2GB.
Before buying I checked my old RAM. According to Speccy they are both DDR2 PC2-8900. Then Speccy lists some JEDEC info:
#3: 555,6 MHz, CL6
#2: 400 MHz, CL5
#1: 333,3 MHz, CL4
Alright, so I thought that if I bought some 800 MHz CL5 mermory, everything would be great. The JEDEC info for the new RAM modules is as follows:
#3: 400 MHz, CL5
#2: 266,7 MHz, CL4
#2: 200 MHz, CL3
So, now the two new modules are running at 400 MHz, CL5 - I understand that with DDR2 RAM the effective frequency is the double so I guess that is OK.
The old modules are running at 555,6 MHz, CL6. That would be 1111,2 MHz when doubled.
I do not get it; why do the old modules not run at 400MHz, CL5? Would that not result in better performance?
Thanks in advance.
Mathias Brandt.