Classic British Flight Sim

DaveB wrote:Point is, the flying pc is registering the full 1.28gig but reports the memory speed at 166mhz.. not 333mhz so it may be slowed down by the 256mb dimm.

Dave, that is probably right. The memory runs at 166, but the double data rate gives it the throughput of 333 (it transfers twice per clock). Unless it used to say something different, I wouldn't worry.

I think I'd take 1GB of PC3200 over 1.5GB of PC2700 personally - my box rarely fills more than 1GB anyway.

James

Hi Dave,

James is spot on. DDR (Double Data Rate) signals a change on both the leading and trailing edge of the digital signal, therefore the clock speed is only half of the data change speed... now don't ask me how DDR2 or DDR3 works (although I suspect its the digital equivilant to Quarternary Phase Shift Keying)

Tks for that guys I used to like it when you had the choice of FP Ram or EDO Things are much more confusing these days :roll:

Still no word from Crucial but I can't see me getting one now until Monday at the earliest :k: All this as a cheap way to screw a few more miles out of FS9 and an attempt to get FSX to run better. I dunno.. the things we do in moments of madness

ATB

DaveB :tab:

All this techie stuff on RAM has my brain spinning but from what I can gather is this:

Out of arguments sake and this makes it easy on my brain........If say you have two slots for memory, fill one with 1Gb and the 2nd with 256Mb memory, does this mean it will not be as good as if you just had just the one slot filled with 1Gb?

Sorry if this is a stupid question but when it all becomes technical like this I somehow get left behind!! :redface:

Hi Nigel,

If you only have two slots and they're not 'Dual Channel' (eg.. if the slots can accept 2 x identical dimms and effectively run them as one big one) then no.. your system shouldn't slow down, as long as the dimms are of the same type.. eg, both PC2700/333mhz or PC3200/400mhz e t c

You can run 2 different speeds of ram but the memory bus will default to the speed of the slowest so it's counter-productive and could cause probs so is best avoided

ATB

DaveB :tab:

You can run 2 different speeds of ram but the memory bus will default to the speed of the slowest so it's counter-productive and could cause probs so is best avoided

Thanks Dave, if I'm right in understanding your reply I have 1Gb Ram in slot one and the other is a 256Mb in slot two, shall I bin the 256 one?

Sorry to be a pain but definately not tech minded.

Regards nigel.

Hello Nigel

If the 256 is of the same type/speed as the 1gig, then I'd leave it in mate. My flying pc has 3 slots.. I have 2x512 and 1x256 fitted and it runs fine as all the dimms are of the same type.. the only difference being the size of ram onboard

When (and I've still not heard!) I get a reply back from Crucial.. the flying pc will have 3GB.. possibly 2GB (I have the 3 dimms here but am not sure yet if one will find it's way into another pc) though I could concievably put the 2 new 1GB dimms in and leave one of the 512's in place. We'll see. Too much ram and so little space to put it in

ATB

DaveB :tab:

Hi Nigel... what make / model is the new board and I'll check out if its dual channel or not.

Hi Ben

From a non techie and hope I have got it right:

Micro Star

PM8M3-V (MS7211 v4.x) Micro ATX mainboard

Hope this is what you need.

Regards Nigel.

Hi Nigel,

If I've read that number correctly, it's a P4 Dual Core mobo (which you must know already) and supports up to 2GB DDR333/400 memory. No mention of dual channel mate so you'll be ok to leave that 256 dimm in situ

Ben.. shoot me down as necessary!

ATB

DaveB :tab: