4GB RAM in an A939 board?

daskrabs

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Jun 28, 2005
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Has anyone successfully built a box w/ 4GB RAM in an A939 (AMD64) motherboard? Regardless of manufacturers stated specs, the most I've been able to get running is 2GB, and I'm going on my third board. Suffice to say, things aren't going well. If anyone has had success w/ this, please let me know what board and RAM you're using, model #'s would be a huge help. thanks
 
It's a CPU problem, sorry. Most A64's have trouble with 4 or more banks of RAM. 2 1GB DIMMs will have 4 banks of RAM to begin with because they're double-sided. You're trying to use 8 banks of RAM, this MIGHT work with a Venice core A64, your chances decrease dramatically with older cores.

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You can get 4gb to run at slower speeds. But only 2gb will show up. You can turn on a -3gb switch in XP to use up to 3gb of physical ram. Check MS's site on this, as there is more to it then just adding the switch. However, if you go with 64-bit XP or LInux you should be able to run 4gb at 333mhz. I don't think 4gb will boot at 400 in any condition. I know my dad's dual xeon has 4 gb, but the ram is running 333. The dual zeon setup i have here at work is running with only a total of 2gb @ 400 so that doesn't really help you any. I personally have NEVER worked with/on a 4gb machine, so everything above 3gb is speculation for me.

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What do you need that amount of RAM for anyway?

Sell 2Gb on ebay. I doubt you'd notice the difference really.

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