Bought CAS4... comes up as CAS5?

[cradivonyk]

I bought a dual channel kit of Corsair XMS2 DDR2-675 cas4 memory. But when I use cpu-z, it comes up as a 3:5 ratio, with 5-5-5-15 timings...

My setup is--

E4300 Core 2 Duo
Gigabyte 965P-S3
2x512MB Corsair XMS DDR2-675 (PC5400) ram CAS4 1.9v


EDIT...

Hmm, when I look at the SPD tab of cpu-Z it shows this--
http://www.escic.com/misc/cpuz.jpg

Under the memory tab it says it is running 335MHz but under the cpu tab it says its at 200MHz. I guess I am just really confused right now, lol.

[Yellowbeard XMS]

The SPD timings are the timings preprogrammed onto the memory to allow it to boot. Have a look at the memory tab, it will show you what the system is actually running. If the timings are not set to your desired values, go into the bios and change them. Also, set the memory voltage to 2.1v.

[DJCorpse]

You need to go into the bios and ensure that you are running 1:1 to begin with. Then you will most likely need to manually adjust your ram timings to 4-4-4 as well or else they will default to 5-5-5 because of the SPD.

The memory tab shows the speed of your ram and the cpu tab shows the fsb. If you are at a 3:5 ratio then you are running async thus the different values under the different tabs.

[cradivonyk]

Well, I found all the memory settings in the BIOS, but to be honest, it looks a little intimidating to me. I know the settings are 4-4-4-12 and the voltage is 1.9v but I dont know which timing goes to which selection on the menu. Maybe I should do a little more research... Oh, and I ULed my cpu-z dump--
http://www.escic.com/cpuz.htm

[Yellowbeard XMS]

In your picture you loaded, look at the chipset and memory section and at the last 4 lines. They show those timings as 5,5,5,15. Change them manually to 4,4,4,12 and find in your manual how to set the memory voltage and you should be good to go.

[cradivonyk]

Ok, I am going to give this a shot this afternoon and see what happens :)

[dominick32]

Something to note. Note all motherboards pick up SPD timings correctly so as everyone else already stated you are going to have to manually enter them through the bios. You should also check vdimm voltage as well, just to make sure you are not automatically overvolting those chips.

Another thing to make sure of. Sometimes SPD timings are programmed wrong in the actual sticks. You are going to want to manually enter what is listed on the side of the heat spreaders.

Good luck.

[cradivonyk]

Something to note. Note all motherboards pick up SPD timings correctly so as everyone else already stated you are going to have to manually enter them through the bios. You should also check vdimm voltage as well, just to make sure you are not automatically overvolting those chips.

Another thing to make sure of. Sometimes SPD timings are programmed wrong in the actual sticks. You are going to want to manually enter what is listed on the side of the heat spreaders.

Good luck.


Good to know. In my mobo bios, the only voltage adjustments I saw for the memory were increases, not actual voltages. For example, it would say +0.1v, +0.2v, etc. Is that how they are all set up? I believe the mobo I have came with a utility that shows the voltages and frequency's on the desktop, so I'll look into that.

[cradivonyk]

Ok, so I changed the timings manually, and I upped the voltage to 2.1. But when I run cpu-z, the timings change, but the divider is still set at 5:3. I dont see a setting anywhere in the BIOS to change that.