A64 CPU and RAM interaction question

[JBird7986]

Does my DDR RAM clock of 166MHz (CBID and CPUZ confirmed) mean that my 4 sticks of RAM are running at the max for 4 DIMMs in a Newcastle A64 (333MHz [i.e. 166x2])? Or are they running at half speed?

 

[JBird7986]

bump

 

[JBird7986]

bump

 

[RichUK]

yes unfortunately if you are using four sticks of RAM then the mem controllers on the old A64 cores revert the speed back to DDR333- 166Mhz over the standard DDR400M - 200Mhz, and to top that off it also runs a 2T command rate 🙁 ..

i would recommend that you scrap the 4x512Mb and go for 2x1Gb sticks that will give you 1T and DDR 400 speeds

 

[n7]

Originally posted by: RichUK
yes unfortunately if you are using four sticks of RAM then the mem controllers on the old A64 cores revert the speed back to DDR333- 166Mhz over the standard DDR400M - 200Mhz, and to top that off it also runs a 2T command rate 🙁 ..

i would recommend that you scrap the 4x512Mb and go for 2x1Gb sticks that will give you 1T and DDR 400 speeds

Rich is correct.

However, i see no reason to be overly concerned about your RAM running @ 2T DDR333.

Yes, 1T DDR400 will offer better performance, but not by all that much that buying 2x 1024MB would be justified (unless you have money to burn).

 

[JBird7986]

I wish...I'm a poor college student (remind me to thank Duke for upping the tuition AGAIN) saving for an R520 (and an X2 after the price drops significantly)...

I was just wondering if my RAM was running sans divider.

 

[furballi]

Running at T2 and DDR333 will cost you about 70MHz of CPU clock speed.