RAM timings wrong

[ReverendGadgetBoy]

Hokay. I have a ASUS P5W DH Deluxe motherboard running the latest BIOS (1602), and I have Corsair XMS2 DDR2 800 CL4 memory (2x512). anyhoo, the RAM runs at DDR2-667 5-5-5-15, and i want to get it back to DDR2-800 4-4-4-12. I went through the BIOS, and I managed to get it back to DDR2-800, but nowhere in the BIOS is the ability to change the timings. It cannot be done. And from what ive heard of other people's ASUS bios, it should be below the other RAM stuff, but theres nothing there for me.

Basically my question is, is there any way my BIOS could be messed up, is there any way to fix it, and can I change my timings some other way? I want to get it up to speed.

P.S. I'm not sure if it matters, but the RAM is 2.1V, but my mobo runs it at 1.8V, and when i turn it up it warns me by turning the text red.

 

[mpjesse]

God Asus's site sucks. I went looking for your mobo manual and it linked me to some fcuking wifi device. And their USA site is so damn slow.... Anyways, i'd find your manual and look for timing info in it if i was you.

As for RAM voltage, MB and RAM have seperate voltages. 2.1 is the standard for DDR2, but you can bring it up to 2.2 without damaging it. Anything beyond that... well... it's a risk.

 

[Mondoman]

Actually, 1.8V is the standard for DDR2.

 

[Mondoman]

According to the Asus website, your MB has "Precision Tweaker":

Precision Tweaker is designed for serious overclockers. It offers ways to raise system performance inch-by-inch and step-by-step to achieve maximum performance! This is about getting the most out of your machine, and taking pride in your customized computer. Precision Tweaker provides overclocking options for all major parts of the system: CPU, Memory, PCI-Express, and Front Side Bus.

Look through your MB manual.

 

[ReverendGadgetBoy]

Aight thanks a lot. I'll see if I can find the manual. And thanks for telling me about the voltage. I'll set it up to 2.1V again.

 

[ReverendGadgetBoy]

Well thank you all very much. I looked in the manual and found out how to change the settings so that I can change the timings. I'll put everything back up to standard now.

 

[Mondoman]

Actually, 1.8V is the standard for DDR2.

That's stock voltage for lower speeds, such as 533 or 667. Doing any type of overclocking, or increasing RAM speeds will require a voltage increase.
To clarify: 1.8V is the DDR2 "standard" voltage. Any memory DIMM that will not run at 1.8V by definition doesn't meet the DDR2 standard and can be returned for RMA replacement. Of course, overclocking successfully *may* require a higher-than-standard voltage, depending on the module. Also, many manufacturers market DIMMs according to their non-standard manufacturer-sanctioned overclock specs. See this post for more details:
http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=1249881#1249881

 

[mpjesse]

Actually, 1.8V is the standard for DDR2.

That's stock voltage for lower speeds, such as 533 or 667. Doing any type of overclocking, or increasing RAM speeds will require a voltage increase.
To clarify: 1.8V is the DDR2 "standard" voltage. Any memory DIMM that will not run at 1.8V by definition doesn't meet the DDR2 standard and can be returned for RMA replacement. Of course, overclocking successfully *may* require a higher-than-standard voltage, depending on the module. Also, many manufacturers market DIMMs according to their non-standard manufacturer-sanctioned overclock specs. See this post for more details:
http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=1249881#1249881

Yeah my bad, the JEDEC standard is 1.8v. Got mixed up w. plain 'ole DDR.