I've tried several "right" places to get this information, but with no luck.
Does anyone know if PC3500 (DDR433) memory is backward compatible with
PC2700 (DDR333)? I asked Abit if PC3500 would work in my SD7-533 mb and all
they said was if it's backward compatible (can run in 2700 mode), it will.
Here's what I'm trying to do. I'm building another computer for work similar
to the one I have at home. I've had the mb for months, just haven't gotten
around to building it. Since I have to get more memory anyway, I thought I'd
try PC3500 to try to get some extra OCing out of it.
The mb only allows certain dividers and multipliers to set everything. My
computer runs about the same speed if the FSB is set at 150mhz or 160mhz
like this: the divider at 4 and memory multiplier at 5, so the DDR333 runs
at 150/4 X 5 X 2= 375mhz OR the divider set at 4 and the multiplier set at 4
so the DDR333 runs at 160/4 X 4 X 2=320mhz. The first way it runs at 2560mhz
and the 2nd way it runs at 2400mhz, but with a higher memory bandwidth. Some
games run a little faster one way, some the other. It's a toss up. What I'd
really like to do is run it at 160 FSB and the 5 multiplier to get the
memory at 400mhz. That, coupled with the fact that the PC3500 is rated at
CL2, should give me quite a boost. And heck, I've got to buy more memory
anyway. Now, using a lower FSB and higher multiplier, I've had the DDR333
running at about 386mhz, but the stability was questionable as I recall.
So, my questions are: will the PC3500 run in my mb? and if it does, could
the memory bus on the mb actually limit the speed I can get out of the
memory so running PC3500 won't actually give me any gain?
--
Slot
Tweaks & Reviews
www.slottweak.com
Yes it will be fully backwards compatible and work the way you said,
basically 3500 is just the speed it is rated to, there's no physical
difference from PC2700. The only problem you could have is that some PC3200
is rated at cas3 and some P4 mobos wont do cas3, but the stuff you are
looking at is obviously higher quality.
"GTX_SlotCar" <[email hidden]> wrote in message
news:amajnc$47fo4$[email hidden]...
> I've tried several "right" places to get this information, but with noluck.
> Does anyone know if PC3500 (DDR433) memory is backward compatible with
> PC2700 (DDR333)? I asked Abit if PC3500 would work in my SD7-533 mb andall
> they said was if it's backward compatible (can run in 2700 mode), it will.
> Here's what I'm trying to do. I'm building another computer for worksimilar
> to the one I have at home. I've had the mb for months, just haven't gotten
> around to building it. Since I have to get more memory anyway, I thoughtI'd
> try PC3500 to try to get some extra OCing out of it.
> The mb only allows certain dividers and multipliers to set everything. My
> computer runs about the same speed if the FSB is set at 150mhz or 160mhz
> like this: the divider at 4 and memory multiplier at 5, so the DDR333 runs
> at 150/4 X 5 X 2= 375mhz OR the divider set at 4 and the multiplier set at4
> so the DDR333 runs at 160/4 X 4 X 2=320mhz. The first way it runs at2560mhz
> and the 2nd way it runs at 2400mhz, but with a higher memory bandwidth.Some
> games run a little faster one way, some the other. It's a toss up. WhatI'd
Quoted text (17 lines)
> really like to do is run it at 160 FSB and the 5 multiplier to get the > memory at 400mhz. That, coupled with the fact that the PC3500 is rated at > CL2, should give me quite a boost. And heck, I've got to buy more memory > anyway. Now, using a lower FSB and higher multiplier, I've had the DDR333 > running at about 386mhz, but the stability was questionable as I recall. > So, my questions are: will the PC3500 run in my mb? and if it does, could > the memory bus on the mb actually limit the speed I can get out of the > memory so running PC3500 won't actually give me any gain? > > > -- > Slot > > Tweaks & Reviews > www.slottweak.com > >Yes, it's GeIL PC3500 433MHz DDR Platinum Series, 4.5ns. CL2.5 at 433 and
CL2 at 400. I expect to be running it at about 400. 256mb is $89 shipped. I
can't believe how cheap it is for memory of this quality right now.
Thanks
> but the stuff you are
> looking at is obviously higher quality.
--
Slot
Tweaks & Reviews
www.slottweak.com
