Can i run my ram at lower timings?........

[FunkyMunky]

I have 2gb (1gbx2) OCZ DDR400 ram that is rated 2-3-2-5 (1T) timings. I'm currently running the ram at less than it is rated, at 186Mhz (rather than 200Mhz), because i'm using a 133 divider.

As the ram is rated 2-3-2-5, and it wont run at the speeds of higher dividers, can I tighten the timings to 2-2-2-5 or lower? Or is what the ram is rated its lowest no matter what?

 

[5t3v0]

Those are very tight timings to be squeezing anymore out of at only 14MHz lower than stock. Have you not considered running looser timing with the 166 divider. It would almost certainly be faster overall. There's a guy running those OCZ at 2.5-3-3-5 @ 234MHz in this thread

 

[FunkyMunky]

i woudl but on a 166 divider, my ram would need to run at 260Mhz as i'm running my opty 165 at 2.6ghz, i am almost positive that my ram can't do 260. I am running at stock voltage tho so maybe i can get tigher timings with higher volts? It would be nice since i don't want to sacrefice cpu speed.

 

[5t3v0]

How do you work that out? Opty 165 is a x9 multi chip so you must be running HTT at 290 to get 2.6GHz right?. To calculate ram frequency you use the following formula:

DRAM Frequency = (HTT * CPU mutilplier) / CEIL(CPU multiplier * (200 / DRAM ratio))

where CEIL = ceiling (rounded up to whole number)

= (290 * 9) / CEIL(9 * (200 / 166))

= 237.2727

Check it on A64MemFreq1.1 if you dont believe me.

I think the OCZ could manage that @ 3-3-3-6 at least, perhaps even tighter.

 

[Matt2]

Those Platinums WILL NOT, I repeat, WILL NOT run at lower timings than 2-3-2-5. Even 2-2-2-5 causes major instability for me.

Furthermore, my set will not run past 220fsb even at 3-3-3-8 timings. Are you sure there arent any dividers between 133 and 166? Like 150 or something? I guess I'm spoiled with my DFI board, has lots of dividers.

Good luck.

EDIT: Also, dont' bother raising the vDIMM voltage on that memory. 2.8 is as high as the warranty on those go and they dont respond to voltage AT ALL.

 

[buzzsaw13]

Originally posted by: Matt2
Those Platinums WILL NOT, I repeat, WILL NOT run at lower timings than 2-3-2-5. Even 2-2-2-5 causes major instability for me.

Furthermore, my set will not run past 220fsb even at 3-3-3-8 timings. Are you sure there arent any dividers between 133 and 166? Like 150 or something? I guess I'm spoiled with my DFI board, has lots of dividers.

Good luck.

EDIT: Also, dont' bother raising the vDIMM voltage on that memory. 2.8 is as high as the warranty on those go and they dont respond to voltage AT ALL.

He can run those dividers running A64 tweaker, its a hassle to open it up everytime to boot up, but it will run the ram at an ideal divider

 

[5t3v0]

A64Tweaker is nothing but trouble & best avoided IMO. I had lockups & blue screens when trying it out. It just didnt seem to remember the settings correctly.

Its really frustrating how none of the other mobo manufacturers have offered more divider options in their BIOSes. I'm contemplating getting a DFI board next but the thought of all the hassel swapping them over is not appealing.

 

[FunkyMunky]

Originally posted by: Matt2
Those Platinums WILL NOT, I repeat, WILL NOT run at lower timings than 2-3-2-5. Even 2-2-2-5 causes major instability for me.

Furthermore, my set will not run past 220fsb even at 3-3-3-8 timings. Are you sure there arent any dividers between 133 and 166? Like 150 or something? I guess I'm spoiled with my DFI board, has lots of dividers.

Good luck.

EDIT: Also, dont' bother raising the vDIMM voltage on that memory. 2.8 is as high as the warranty on those go and they dont respond to voltage AT ALL.

Ye well i tried at 2-2-2-5 and yes ur right great insteability, now um, i think i might have screwed my memory cause now when i put back to 2-3-2-5 timings and same divider i get errors :S. I'm trying things might just be a setting but i hope i didn't fry my ram

 

[5t3v0]

Originally posted by: FunkyMunky
Ye well i tried at 2-2-2-5 and yes ur right great insteability, now um, i think i might have screwed my memory cause now when i put back to 2-3-2-5 timings and same divider i get errors :S. I'm trying things might just be a setting but i hope i didn't fry my ram

Unlikely. Reset to Optimized Defaults. If no joy, then clear CMOS.

 

[FunkyMunky]

Originally posted by: 5t3v0

Originally posted by: FunkyMunky
Ye well i tried at 2-2-2-5 and yes ur right great insteability, now um, i think i might have screwed my memory cause now when i put back to 2-3-2-5 timings and same divider i get errors :S. I'm trying things might just be a setting but i hope i didn't fry my ram

Unlikely. Reset to Optimized Defaults. If no joy, then clear CMOS.

Ok well actually i fixed it, it turns out i was setting 2-2-3-5 timings rather than 2-3-2-5 like i should have, i dealt with that now it boots again , i'm SO releived .

Ok well how about the other settings in the bios, like the other timings not in the 4 above. If i changed those would i see any performance increase?

 

[5t3v0]

Originally posted by: FunkyMunky
Ok well how about the other settings in the bios, like the other timings not in the 4 above. If i changed those would i see any performance increase?

Most definately in Everest or Sandra. Probably not to any noticable degree in real world use. Still, performance is performance & we are overclockers so it would a crime not to tune them up to get every last drop out of the hardware. I've posted all my timings on this thread & there is a very good explanation of all the timings & recomendations for settings on DFI Street.