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How backwards-compatible is DDR RAM?

post #1 of 6
Thread Starter 
Silly question, but I wanted to ask BEFORE I put my expensive RAM to risk. Seems like common sense

Is it safe to use expensive, high-end RAM in older systems? I have this old Palomino Socket A (Asus of some kind, bought before I knew anything about computers) and some 2x1GB G. Skill HZ series: the question is, if I use it in the slots, will it damage either the motherboard or the RAM?

I have a new motherboard ready to install which is also socket A, and the manual says that it can run two slots at DDR 400, and three at 333, so I am assuming it will work. HOWEVER, is it likely to be safe? It may sound over-precautious, but I don't want to miss anything obvious out. kthx.
EVE2
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EVE2
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Maxtor 320GB Windows XP SP2 Viewsonic 724X Advent Wired USB 
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post #2 of 6
i think motherboards usually have a limit. depending on how old it is it may be less than 2 gigs. do you have any more info.
cant complain..
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cant complain..
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3800 X2 Asus A8N5X EVGA 7600GT CO 2GB G.SKILL DDR400 
Hard DriveOptical DriveOSMonitor
2x80GB WDC TSST DVDRW + Samsung DVD XP Pro SP2 Samsung 17" 710n LCD 
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Not good... ASPIRE 520w 35@12V RAIDMAX SMILODON Razer Diamondback 
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post #3 of 6
You should be able to use it just as long as the stick fits properly into it's slolt. As lessthanjake has pointed out it may not recognize the full 2GB and limit it's total available memory. Either way it should work just fine.
Elite
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Elite
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post #4 of 6
Thread Starter 
Hrm, thanks. My new one says it will take 2GB at full 400, my old one says it would take 2GB at 333. Is it dangerous to put 400s in a 333? My sense is telling me that no, obviously there is no danger, it would just run slower, but I dunno. Anyone had any bad experiences?
EVE2
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon 64 X2 Dual Toledo 4800 Asus A8R32-MVP X1900XT G. Skill DDR 500 HZ Series 
Hard DriveOSMonitorKeyboard
Maxtor 320GB Windows XP SP2 Viewsonic 724X Advent Wired USB 
PowerCaseMouse
420 W Tagan / FSP 300W Sec. ATX Jeantech of some sort Killed - now using default MS mouse. 
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EVE2
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CPUMotherboardGraphicsRAM
Athlon 64 X2 Dual Toledo 4800 Asus A8R32-MVP X1900XT G. Skill DDR 500 HZ Series 
Hard DriveOSMonitorKeyboard
Maxtor 320GB Windows XP SP2 Viewsonic 724X Advent Wired USB 
PowerCaseMouse
420 W Tagan / FSP 300W Sec. ATX Jeantech of some sort Killed - now using default MS mouse. 
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post #5 of 6
No, it'll just run at a lower speed. You could then try to tighten up the timings a little more if you felt like it.
Elite
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CPUMotherboardGraphicsRAM
IBM PPC Triple core @ 3.2GHz Custom ATi Xenos 10MB 
Hard DriveOptical DriveOSMonitor
120GB DVD ROM XBox 360 Dashboard Dell 24" 2405FPW 
PowerCase
Big Honkin One Black 
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Elite
(13 items)
 
  
CPUMotherboardGraphicsRAM
IBM PPC Triple core @ 3.2GHz Custom ATi Xenos 10MB 
Hard DriveOptical DriveOSMonitor
120GB DVD ROM XBox 360 Dashboard Dell 24" 2405FPW 
PowerCase
Big Honkin One Black 
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post #6 of 6
Like said above you can get higher rated ram than what the board can techinically take ..the ram will just down clock to be compatible to the speed limits of the board
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