Memory Ratio

[chris480]

Well I just built my computer, and now that I'm done, there is just some fine tunning.
My Ram times should be at 4-4-4-15, (default 5-5-5-15) ddr2800
FSB: DRAM 5:6
When I try to set the times to the correct numbers, the computer becomes unstable and BSOD every 10-30mins.

How would I fix this. Help appreciated.

 

[cnumartyr]

If the default is 5-5-5-15 and you are trying to run it at 4-4-4-15 it's not going to do it without more voltage.

Either be happy with 5-5-5-15, buy new RAM, or increase voltage.

 

[chris480]

Sorry, my bored defualts them at 5-5-5-15
The ocz 2gb should be at 4-4-4-15

 

[cnumartyr]

Sorry, my bored defualts them at 5-5-5-15
The ocz 2gb should be at 4-4-4-15

At what voltage? You sure it's up from 1.8v?

 

[Thanatos421]

Agree, it's most likely undervolted. Don't set it to Auto. Go to OCZ website and check the specs for that RAM. Then set that voltage in your BIOS.

 

[chris480]

So I don't really have to worry about the ratios?

 

[Thanatos421]

Right now you don't. Your RAM is running at DDR2-800 just as it should at stock.

If you decide to overclock the proc then you may have to adjust them to keep the RAM under control. If you do decide to overclock, then set the ratio 1:1 for the time being. Then dial in your CPU target speed. After you figure out where the CPU sweet spot is, then go back and adjust the ratio (and timings if applicable) until you find the speed the RAM will run at. Just remember, any memory overclocking might require a RAM voltage increase. Don't attempt to overclock the memory too aggressively as it doesn't really seem to make a big difference in real world applications. In fact, I would try to use the memory ratios to get as close as possible to the rated speed, then you can maybe run tighter timings.

Just make sure that you are giving your RAM at least the required voltage according to OCZ.

 

[Khar00f]

To hit 4-4-4-15 you need to set it to 2.1V

I have the 2GB Kit Reaper from OCZ and it`s specs are that much, so if you have those then 2.1V it is


Since someone mentioned it would just like to get something straight, everyone says to put the memory on a ratio of 1:1 but if you do that, then as soon as you jack the FSB up the ram goes up with it, so if yu put the FSB at 333(say Q6600 at 333X9) then your ram will be running at 1333 which is much higher than the 800 specs, am i correct?
which my guess is most ram will just fold under that much higher clocks (60% more than specs). or if i missed something, please correct me.

 

[Thanatos421]

You missed something

DDR runs at double the FSB if it's set to 1:1 so a 333MHz FSB would yeild DDR2-667. While this is certainly lower than DDR2-800 is speced, it's nice to set the ratio 1:1 until you finish your CPU overclock. Once you hit that number, and it's stable, then you adjust your ratio (if you want to, cnumartyr showed us that in real world applications, RAM frequency means little to nothing) back to near 800 or slightly over if you feel frisky.

Only the FSB is quad pumped to get its effective speed.

 

[Khar00f]

ok you see, that i knew but the problem is the 1:1 ratio, on my board (Asus P5N32E-SLI Plus) really means 1:1 (the way i described it above), the way you describe it, would be Sync Mode.

cause i opened a thread about a few days ago cause i'm having problems overclocking and it was one of the questions, but no one replied to it. I just wanted to clear things up cause i'm really having a hard time getting my Q6600 to 3.0 even.

Anyways thanks for the heads up i'm not gonna highjack your thread

 

[Thanatos421]

Oh, damn motherboard differences 😛 BIOS settings need to be standardized. Just know that when someone says set memory ratio 1:1 they mean take the FSB (which for 1333 FSB would be 333) and double it for your RAM speed, which would yeild DDR2-667. I don't quite get how 1:1 can mean 1:2 on your board essentially. Strange.

 

[hvedstrup]

Nvidia chipsets and quad cores are a really bad combo if you want to overclock. You need P35 or X38 to overclock Quads successfully.

P.S Sorry if im hijacking the thread

 

[Hatman]

No you don't, mine overclocks fine on 680i.

Just like people said put the voltage to 2.1 and set it to 4-4-4-15 and it'll work fine.

 

[hvedstrup]

No you don't, mine overclocks fine on 680i.

Just like people said put the voltage to 2.1 and set it to 4-4-4-15 and it'll work fine.

Didn't say it isn't possible to overclock on Nvidia chipsets, its just harder to get a stable oc. At what speed are you running your Q6600?