Question about DDR2 Ram

[LittleNemoNES]

Ok I'm used to DDR1 where if ram is rated @ 250 it means that it can OC to that speed. Is DDR 2 the same way? Or is DDR2 400 and DDR2 800 way different?

Just wanted to know so I could make the right mem decision when Core 2 Duo arrives.

 

[Furen]

It depends. If you buy DDR400 crucial, for example, you may be able to get up to 250+ (DDR500) out of it, but it is only guaranteed to work at DDR400. The same thing can be said about DDR2. The rating that are advertised are the ratings at which the memory is tested and works well (without too much heat, etc). That does not mean that you wont be able to get more out of it, just that the manufacturer will only guarantee that speed.

 

[DrMrLordX]

What interests me is how well DDR2 handles voltages. I know it's specced to run at voltages far lower than that of DDR (1.8v vs 2.6v), but can DDR2 handle as much voltage as DDR? Do DDR2 boards even support voltages of those levels?

Something tells me that DDR2 can't take voltages as high as 2.6, 2.9, or even 3.3v

 

[CyborgNinja117]

Originally posted by: DrMrLordX
What interests me is how well DDR2 handles voltages. I know it's specced to run at voltages far lower than that of DDR (1.8v vs 2.6v), but can DDR2 handle as much voltage as DDR? Do DDR2 boards even support voltages of those levels?

Something tells me that DDR2 can't take voltages as high as 2.6, 2.9, or even 3.3v

ddr2 will die quickly if go above 2.2 volts (unless its 1000mhz) i did it w/ my crucial which said it would work at 2.2v... 2 days later ram died of overheating (even it had a heatspreader)

ddr2 is best kept at around 2.0-2.1

 

[LittleNemoNES]

Ok but say I use 1000 mhz modules -- do I need to do anything to make it run @ that speed? Like increase the CPU frequency or up the FSB? I only know how to OC on socket 939

 

[LittleNemoNES]

BUMP

 

[TheRyuu]

You should be able to just set a divider on the Intel Platform that will let you run at that speed (not sure on that though).

Unless you want to run 1:1 (500mhz on FSB!?!? don't think so) you will have to use a divider. My DDR ram is at 2.6v @ DDR500 (i got good ram). Runs just as fast as any DDR2 ram

 

[DrMrLordX]

Originally posted by: CyborgNinja117

Something tells me that DDR2 can't take voltages as high as 2.6, 2.9, or even 3.3v

ddr2 will die quickly if go above 2.2 volts (unless its 1000mhz) i did it w/ my crucial which said it would work at 2.2v... 2 days later ram died of overheating (even it had a heatspreader)

ddr2 is best kept at around 2.0-2.1[/quote]

Thanks for the info.

 

[LittleNemoNES]

So to run 1000mhz memory DDR2, I need to set dividers to allow it to run @ that speed? I thought DDR2 was different. Like as soon as I put it in it would run @ 1000 mhz mem without altering the FSB or Multiplier.