Re: Which memory is faster?
The 8x8 will be much faster because that allowed each Xeon to have 4 modules. When you switched to 4x16, each Xeon only had 2 modules which cut bandwidth in half.
Re: Which memory is faster?
Well dang. I thought I was starting to understand memory, but I guess not. I thought that 4xN is faster than 8x(N*.5)?
Re: Which memory is faster?
Quote:
Originally Posted by
zombie67
Well dang. I thought I was starting to understand memory, but I guess not. I thought that 4xN is faster than 8x(N*.5)?
4x is faster per cpu than 8x. But it's per cpu.
For mainstream cpus, 2x is faster.
Re: Which memory is faster?
Ah. Per CPU. I thought 4 channels meant 4 DIMMs. But the rule is "one DIMM channel, per CPU"? So in this case, the CPU has 4 channels x 2 CPUs = 8 DIMMs?
Any chance I could have known your answer from the numbers in the images I posted? What would have told me what you summarized? Or was the info from CPU-Z not sufficient to make a decision?
Re: Which memory is faster?
Quote:
Originally Posted by
zombie67
Ah. Per CPU. I thought 4 channels meant 4 DIMMs. But the rule is "one DIMM channel, per CPU"? So in this case, the CPU has 4 channels x 2 CPUs = 8 DIMMs?
Any chance I could have known your answer from the numbers in the images I posted? What would have told me what you summarized? Or was the info from CPU-Z not sufficient to make a decision?
Yes, 4 channels x 2 CPUs = 8 DIMMs is the right way to look at it.
CPU-Z shows in the upper righthand corner the "Channel #". With 8x8 it says quad and with 4x16 it says dual.