Purpose of DDR2 1066 ram

[LOUISSSSS]

If DDR2 800 ram allows me to OC my Intel Core CPU to 400 FSB without overclocking the ram, whats the point of 1066mhz ram? 533 FSB?
At stock speeds (or lower than 533mhz speeds) these ram modules should be slower shouldn't they? They have looser timings like 5-5-5-18 as opposed to 4-4-4-12 DDR2 800 modules

 

[secretanchitman]

probably for the penryns. i believe they are 333fsb....

 

[LOUISSSSS]

Originally posted by: secretanchitman
probably for the penryns. i believe they are 333fsb....

so they'll be able to OC to 533mhz fsb?

 

[EarthwormJim]

The advantage is you can use a better strap to get better performance

 

[PCTC2]

Originally posted by: LOUISSSSS
If DDR2 800 ram allows me to OC my Intel Core CPU to 400 FSB without overclocking the ram, whats the point of 1066mhz ram? 533 FSB?
At stock speeds (or lower than 533mhz speeds) these ram modules should be slower shouldn't they? They have looser timings like 5-5-5-18 as opposed to 4-4-4-12 DDR2 800 modules

Only at higher speed do they have the looser timings. If you look at their SPD sheet, at DDR2-800, they have 4-4-4-12 @ "stock" DDR2-1066 voltage AND 5-5-5-18 @ lower voltage. They are really just higher binned DDR2-800. So if you run it at 400FSB, you have similar timings, but you can run it at 450-500 FSB @ 1:1 ratio. I actually got my DDR2-1066 @ 4-4-4-12 timings @ 1066DDR @ a 3:4 FSBRAM Ratio. There really is no point except for extremely high FSBs because it offers very small performance gains over DDR2-800, if any.

 

[Extelleron]

DDR2-1066 will offer higher speed using a divider allowing the RAM to run at a higher speed than the FSB. As others have said there is not much of a difference in performance.

With an AMD AM2+ mobo + Phenom CPU, you can run DDR2-1066 with stock CPU as it is an option in the new memory controller.

DDR2-1066 is a luxury; you are best off buying cheap DDR2-800 and overclocking it if you want to.

 

[LOUISSSSS]

Originally posted by: PCTC2

Originally posted by: LOUISSSSS
If DDR2 800 ram allows me to OC my Intel Core CPU to 400 FSB without overclocking the ram, whats the point of 1066mhz ram? 533 FSB?
At stock speeds (or lower than 533mhz speeds) these ram modules should be slower shouldn't they? They have looser timings like 5-5-5-18 as opposed to 4-4-4-12 DDR2 800 modules

Only at higher speed do they have the looser timings. If you look at their SPD sheet, at DDR2-800, they have 4-4-4-12 @ "stock" DDR2-1066 voltage AND 5-5-5-18 @ lower voltage. They are really just higher binned DDR2-800. So if you run it at 400FSB, you have similar timings, but you can run it at 450-500 FSB @ 1:1 ratio. I actually got my DDR2-1066 @ 4-4-4-12 timings @ 1066DDR @ a 3:4 FSBRAM Ratio. There really is no point except for extremely high FSBs because it offers very small performance gains over DDR2-800, if any.

i get it now

 

[Gillbot]

Originally posted by: Extelleron
DDR2-1066 will offer higher speed using a divider allowing the RAM to run at a higher speed than the FSB. As others have said there is not much of a difference in performance.

With an AMD AM2+ mobo + Phenom CPU, you can run DDR2-1066 with stock CPU as it is an option in the new memory controller.

DDR2-1066 is a luxury; you are best off buying cheap DDR2-800 and overclocking it if you want to.

+1

I bought PC2-8000 ram which is rated for DDR2-500 I believe and the only reason I got it was the headroom for overclocking. Otherwise I would have went with regular 667 or 800 ram.

 

[BlueAcolyte]

DDR2-500? You mean 1000, right? And DDR2-1066 is for people who don't know there's DDR2-800 RAM that's just as good and cheaper.

 

[Gillbot]

I meant 500x2 = 1000

 

[Tim]

So let me see if I understand this. (I'm still learning)

Can I probably take my ddr2-800 @ 4-4-4-12 2.1v, and possibly run it up to ddr2-1066@ 5-5-5-18, 2.1v?

 

[Gillbot]

Depends on the ram and quality. Though much of the time, if you go to far with your ram you can kill it due to the excess heat.

 

[Tim]

Ah, so changing the timings has no effect on heat issues. I thought it might be an either/or scenario