Hey, I'm wondering can someone tell me how to get my ram to 1066? I'm using the following spec: Intel e8500 Asus p5q-e 1 GB Sapphire Toxic Corsair DDR2 xms2 1066 mhz (4 Gb) The RAM is running at the following: http://hdimage.org/images/dlwldnlpspj52zl4oot_ram.jpg And the cpu is at: http://hdimage.org/images/bgjpzkj0q4z167h5hugj.jpg Can someone tell me how to get the RAM at 1066Mhz and would a 1:2 ratio achieve this.
Set the Mem Volts to 2.1..here is the equation to figure out Ram dividers: (DDRMhz= 2 x RamMhz : FSBMhz x 4 =QDR) = (DDR533= 2 x 266Mhz : 266Mhz x 4 = 1066QDR) = 1:1 =2400Mhz so a 1:2 would be 666 Mem : 1333 FSB
I tried to look up the bios options for your board prior to posting so that I could provide you with the bios setting info you are looking for but it appears the link to the manual for the board on the Asus site is broken. The memory dividers work this way. It is expressed as FSBRAM frequency ratio. At your current 334FSB, if the divider is 1:1, the DRAM frequency would be the same as the FSB which is 334MHz. But since you are running Double Data Rate (DDR) memory modules which does it's thing twice per each DRAM clock cycle, the effective frequency for the modules is twice the DRAM frequency or 668MHz. So at your current 5:6 divider, the FSB is 334 and the DRAM frequency is 334x6/5=400.8MHz and the effective module frequency is 801.6MHz. 1:2 divider will overshoot your target of 1066MHz: DRAM frequency=334x2/1=668, DDR=1336. Use the best divider available on your board to reach your target memory frequency. Since the dividers are not infinitely adjustable, most likely you will need to settle with the effective module frequency a bit lower or higher than the target.
At 4:5, and default 333Mhz FSB: The FSB is 333Mhz X 4 (1333Mhz) The RAM is 333Mhz X (5/4) = 415.25 Mhz (830Mhz DDR = PC2-6400 speed) At 2:3, and default 333Mhz FSB: The FSB is 333Mhz X 4 (1333Mhz) The RAM is 333Mhz X (3/2) = 499.5Mhz (1000MhzDDR = PC2-8000 speed) What you are looking for is a divider to keep your FSB @ 1333 and run your Mem @ 533 (1066) Just google memory dividers. This is the main reason I use Nvidia chipsets so that I do not have to deal with the memory dividers..lol
Okay, Thanks for the advice but I have just looked at the BIOS again it didn't allow me to change the divider? :S But I seen an option to just increase the frequency the memory is running at. If I used this way would I be at risk of damaging the board or memory by setting it to the rated 1066Mhz? Should note that I get a drop down selection of the available memory frequencies ^^
Just set the Mem volts to 2.1 and set to 1066 in the BIOS. No need to worry, you wont break anything.
