dual channel, DDR, same thing?

[LTC8K6]

It looks like you got good advice in my absence. 😀

 

[SkipE]

THanks mechBgon.
So, is it that I had the drop in performance bandwidth according to Sandra because it averaged across the 3 chipsets? That is, two of them running DC and one of them SC? I think that would come out to about 33% drop.

Yeah, I have another vid card to put in. Just haven't found the time yet...

 

[mechBgon]

Originally posted by: SkipE
THanks mechBgon.
So, is it that I had the drop in performance bandwidth according to Sandra because it averaged across the 3 chipsets? That is, two of them running DC and one of them SC? I think that would come out to about 33% drop.

Yeah, I have another vid card to put in. Just haven't found the time yet...

The drop in performance is caused by the fact that with three modules, no matter what they are, i865G must revert to single-channel operation on all of the memory. It's just The Way Things Are (for i865G/PE and i875P chipsets).

I would also like to say that SiSoft Sandra is generally viewed in a pretty dim light around here. It comes up with some strange stuff that needlessly alarms people. In this case it happens to have done something useful, but don't start taking it as the end-all benchmark suite or anything 😉

Out of curiosity, what is the wattage rating of the power supply in that computer? The power supply should have a label on it, on one of its interior sides. Just curious 🙂

 

[SkipE]

Oh my God. It's only a 250W PS.
I'm hoping that this microATX MB needs much less power.
I have not purchased a vendor PC in quite some time. But I was spending too much time building my own, so I went this way. I have been going for 350-400W PS's on my home-built systems just to be one the safe side. But these, with the exception of one, have been Athlons, which in general require more power I think.

Man, maybe I better not put that new vid card in there. I might have to buy a new PS!

SkipE

 

[mechBgon]

Originally posted by: SkipE
Oh my God. It's only a 250W PS.
I'm hoping that this microATX MB needs much less power.
I have not purchased a vendor PC in quite some time. But I was spending too much time building my own, so I went this way. I have been going for 350-400W PS's on my home-built systems just to be one the safe side. But these, with the exception of one, have been Athlons, which in general require more power I think.

Man, maybe I better not put that new vid card in there. I might have to buy a new PS!

SkipE

The common view is that while the PSUs in HPs and Dells are not rated too high, they at least generally live up to what they ARE rated for, which is more than we can say for a lot of aftermarket cheapies. Still, with four memory modules... they do increase power load; one module can theoretically put out up to 15 watts, according to Micron's own datasheets for double-sided DDR modules. I would hesitate to burden your HP's power supply and cooling capabilities with anything too gnarly, if it were me. But I'm sure it's been done, so take my opinion as simply my opinion 🙂