512x4 VS 1024x2
- Thread starter sthavorn
- Start date
I should have done my homework: http://www.computerforum.com/showthread.php?t=27770
Thanks
Thanks
suprasteve
New Member
yeah, the 4x has better timings, so for actual performance it is better, and I don't see anybody needing more than 2GB in their home computers for a while so you're not gonna hold yourself back either
Then I'm confused with this
Section 5 -- Addendum
Number of Sticks?
Whether to get 1x1024 or 2x512 ... the choice is dependent on the platform. Assuming the sticks are all comparable, if you are using a dual-channel capable system the 2x512 allows the system to actually use the second memory controller so it would be adviseable there. If on the other hand you are using a single channel system (i.e., an older system or a S754 setup) then a 1x1024 will give you slightly (albeit almost nonnoticeable) performance improvement (because the command rate, CR, will be 1 instead of 2) and allows for future upgrading.
What Happens When I Run a System with 4 DIMMs Filled?
What happens when you have all 4 DIMMS populated with RAM? In many cases, your memory clock will drop to the second highest clock speed (provided the memory was able to run at the highest supported clock speed natively). Just look at any older motherboard manual for evidence of this.
With respect to the Athlon64 with on-die memory controlers, those running with "Venice/SanDiego" cores (or newer) will be able to run with all DIMM slots populated at the full speed. With the exception of Athlon64-based processors (i.e., on-die memory controllers), this isnt a concrete rule in that some memory controllers will only drop the speed depending on the type of DDR (and i would imagine DDR2) memory installed (i.e., double sided or single sided).
Generally double-sided (DS) memory is a bit more finicky than single-sided (SS) meaning DS memory will tend to downclock (i.e., 4 sticks of PC3200 will run at PC2700). How do servers, which require craploads of memory ... deal with this? They [generally] use something called Registered Memory which, to simply state, improves signal stability (thus allowing the memory to run at the higher clock)
Section 5 -- Addendum
Number of Sticks?
Whether to get 1x1024 or 2x512 ... the choice is dependent on the platform. Assuming the sticks are all comparable, if you are using a dual-channel capable system the 2x512 allows the system to actually use the second memory controller so it would be adviseable there. If on the other hand you are using a single channel system (i.e., an older system or a S754 setup) then a 1x1024 will give you slightly (albeit almost nonnoticeable) performance improvement (because the command rate, CR, will be 1 instead of 2) and allows for future upgrading.
What Happens When I Run a System with 4 DIMMs Filled?
What happens when you have all 4 DIMMS populated with RAM? In many cases, your memory clock will drop to the second highest clock speed (provided the memory was able to run at the highest supported clock speed natively). Just look at any older motherboard manual for evidence of this.
With respect to the Athlon64 with on-die memory controlers, those running with "Venice/SanDiego" cores (or newer) will be able to run with all DIMM slots populated at the full speed. With the exception of Athlon64-based processors (i.e., on-die memory controllers), this isnt a concrete rule in that some memory controllers will only drop the speed depending on the type of DDR (and i would imagine DDR2) memory installed (i.e., double sided or single sided).
Generally double-sided (DS) memory is a bit more finicky than single-sided (SS) meaning DS memory will tend to downclock (i.e., 4 sticks of PC3200 will run at PC2700). How do servers, which require craploads of memory ... deal with this? They [generally] use something called Registered Memory which, to simply state, improves signal stability (thus allowing the memory to run at the higher clock)
drunkbum222
New Member
Ummm I thought 1gbx2 is better then 512x4
drunkbum222
New Member
Thats not what you said beforegeoff5093 said:
geoff5093 said:
If the same class of memory, 2x1024 because you definitely avoid running 2T command rate, with 4 dimms you damn near have to run 2T.
Your reasoning?
2-2-2-5-2T vs -3-3-2-8-1T might be better off the bat but add 0.1-0.2v and that 3-3-2-8 get's dropped real fast
Whats there to be confused over?
2 DIMMS (when roughly equal) are better than four. In this case the dimms arent equal (CAS2 vs CAS3) but a bit of voltage will easily fix that I love how he racks the post count by randomly regurgiating things
Ot just a bit of voltage really
