Memory timing....

Alright, my ASUS M2N MX SE PLUS, is not made for overclocking, but I am wanting to get 2 more Gigs of ram. I went into BIOS and changed my speed from 200(auto) to 400, since thats the highest my RAM can go before I change it to 1066(yes my mobo supports 1066). I wanted to see my timing, since I can cant change my timing in BIOS(which I dont think I can, maybe, if you know then please help)...and my table timing is

Frequency:270(table 1) 400(table 2) under the SPD tab under Memory tab it does read 5-5-5-18

4 5

4 5

4 5

13 18

my question is, shouldnt my timing BOTH be at Frequency 400 and timing at 5-5-5-18? If yes, then how do I go about changing that both read the same?

MY RAM is:Corsair PC2-6400 DDR2.....

You can't change timings. They are based on the internal architecture of the memeory stick. Lower timings are better. This is what seperates a $25 stick of memory at 800Mhz compared to a $100 stick also at 800Mhz. Those numbers are based on how many clock cycles it takes to find a memory location and change the value. In short, the one with higher timings (5-5-5-18) will take 18 "wasted" clock cycles to find the memory location requested and then update it.

If you are running dual channel memory it will slow down to the speed of the slower because it has to play "catch-up."

Do be careful about changing your memory speeds manually though. Some motherboards do not state the memory speed at its multiplied value, but rather its base value. Make sure you know whether that number you are adjusting is the base or the multiplied value. If the motherboard shows you the base value (before the DDR doubling) and you list the value you want AFTER the multiplier, you're actually pushing the memory up to 4 times the value and you're likely to cause permanent damage to your memory.

here this might help........

http://i190.photobucket.com/albums/z42/Beesters/SPDmemorytiming.jpg

heres is the memory tab:

http://i190.photobucket.com/albums/z42/Beesters/Memorytiming.jpg

I am also looking at my manual, and it does say Dual Channel and each socket are populated....here is the memory I want to buy...

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231166

You can't change timings. They are based on the internal architecture of the memeory stick. Lower timings are better. This is what seperates a $25 stick of memory at 800Mhz compared to a $100 stick also at 800Mhz. Those numbers are based on how many clock cycles it takes to find a memory location and change the value. In short, the one with higher timings (5-5-5-18) will take 18 "wasted" clock cycles to find the memory location requested and then update it.

If you are running dual channel memory it will slow down to the speed of the slower because it has to play "catch-up."

Do be careful about changing your memory speeds manually though. Some motherboards do not state the memory speed at its multiplied value, but rather its base value. Make sure you know whether that number you are adjusting is the base or the multiplied value. If the motherboard shows you the base value (before the DDR doubling) and you list the value you want AFTER the multiplier, you're actually pushing the memory up to 4 times the value and you're likely to cause permanent damage to your memory.

XaosII

Well, when in my BIOS, I have the option of 200, 400, 433? and 533? but thats what it means before multiplying, I think...since my mobo can support 1066.

Well, when in my BIOS, I have the option of 200, 400, 433? and 533? but thats what it means before multiplying, I think...since my mobo can support 1066.

Beesters

Then thats the base value. DDR stands for Double Data Rate memory. The way DDR memory works is that its able to do two operates at once - hence Double Data Rate. When your memory says its a 1066 Mhz, its really a 533 Mhz but then gets doubled based on its artchitecture. Now, because this is partly a feature of the memory stick and partly a feature of the motherboard, manufactueres of motherboards are not all fully clear about whether they should list the base speed before the DDR effect of doubling kicks in (since thats the memory's job) or should they list the doubled speed (because the mobo supports it).

Since you're limited to those options then they are showing you the base speeds before DDR kicks in.

It doesn't mean your memory is any slower or anything. Your 400Mhz memory is really running at 800Mhz.

It also means that if you tried to manually force it to be 1066Mhz (before the doubling kicks in) then the memory will try to run at 2132Mhz, and you'll most definitely cause damage.

Wait. Now im confused.

Do you have two sticks of 512 MB of memory inside? But you said you want 2 more gigs.... But the Newegg one you listed are 2 sticks of 2 GB's for a total of 4 GB? Are you planning to replace or your old ones or add them in addition to the current 1 GB you have?

thats is correct, I currently am running 2G, and I want to get 4G

I have two DIMM slots, 1Gx2...want to get 2Gx2.