Did I get this right?

[InorganicMatter]

Question 1:

I've got an Intel Server Board SE7525GP2. It is listed as needing ECC, Registered, DDR-266/333. I got ECC, Registered, DDR-400. The DDR will downclock, right?

Question 2:

I've got an Adaptec RAID controller that uses SATA-150 ports. The hard drives I chose are SATA II drives, but listed as being backwards compatible with SATA-150. Will there be a performance impact when running this in SATA-150? (other than the obvious 300mps to 150mps decrease)

 

[Nazo]

Memory is backwards compatible. You're just running it slower than it's made to be able to go up to. In fact, companies usually ensure that they run at least a bit past where they officially are supposed to to quality test.

I'm not very familiar with SATA, but, I suspect that compatibility is more of a software thing and speed is more dependant on your bios being properly setup than anything else. I could be wrong, but, I'm pretty sure that it should be ok. Someone can feel free to jump in and tell you the correct answer if that isn't the case. d-:

 

[Agromahdi123]

according to what ive read about SATA II, theres really not much of an increase in performance with the added bandwitdth, i know it seems paradoxical, but until we have better software to manage the hardware better, i believe i read it in a Maximum PC, SATA II really doesnt change the performance by much.

 

[Buckus]

Hard drive technology has actually hit a sort of wall where the hard drives are not able to even max out an ATA100 spec connection. Until they do, SATAII doesn't really offer anything over SATA150, and SATA150 doesn't offer much over ATA100 except for thinner cables.

And yes, your DDR400 will be able to run at lower speeds, the important things are the ECC and registered.