How do you determine what memory speed to get to match a cpu? Does it even have to match?
Some time ago I got an Asrock 970 Extreme4 motherboard. I got a cheap Athlon II X2 250 (3ghz, dual core, no L3) and somehow determined that ddr3-1066 was the right speed for it.
Now looking, I'm guessing to match the cpu's memory controller speed (533) and the memory's i/o bus clock. Is this necessary?
The reason I'm asking is because I decided to upgrade to an FX 4320 (4.2ghz, quad, has L3). I put in some ddr3-1866 memory in due to the following 2 notes from Asrock's motherboard page:.
Note5: The mainboard supports DDR3-2000 MHz DIMMs only when you install a 6-core cpu to the mainboard.
Note7: AMD FX series CPU on this motherboard support up to DDR3 1866 MHz as its standard memory frequency.
wth? okay.... well the cpu memory controller speed (2k) doesnt match the ddr3-1866...
so anyways, everything ran slower. *MUCH* slower. So much that I took the cpu and memory back. So is the mismatched speed to blame?
I'm considering OC'ing the 250 instead of an upgrade (people have gotten it to 3.9ghz). Any thoughts on this vs. actual upgrade?
Some time ago I got an Asrock 970 Extreme4 motherboard. I got a cheap Athlon II X2 250 (3ghz, dual core, no L3) and somehow determined that ddr3-1066 was the right speed for it.
Now looking, I'm guessing to match the cpu's memory controller speed (533) and the memory's i/o bus clock. Is this necessary?
The reason I'm asking is because I decided to upgrade to an FX 4320 (4.2ghz, quad, has L3). I put in some ddr3-1866 memory in due to the following 2 notes from Asrock's motherboard page:.
Note5: The mainboard supports DDR3-2000 MHz DIMMs only when you install a 6-core cpu to the mainboard.
Note7: AMD FX series CPU on this motherboard support up to DDR3 1866 MHz as its standard memory frequency.
wth? okay.... well the cpu memory controller speed (2k) doesnt match the ddr3-1866...
so anyways, everything ran slower. *MUCH* slower. So much that I took the cpu and memory back. So is the mismatched speed to blame?
I'm considering OC'ing the 250 instead of an upgrade (people have gotten it to 3.9ghz). Any thoughts on this vs. actual upgrade?
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