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Yes, you can use DDR 400Mhz memory on Asus A7N8X. You should set FSB to 166Mhz and then set memory frequency to 120% (400Mhz DDR in your case). If you have a good memory you could go up to 150% (500Mhz DDR).<br />
Anyway for best performance I suggest using 2 memory modules (for dual bus memory configuration) and set memory frequency to &quot;Sync&quot;.
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Yes, you can use DDR 400Mhz memory on Asus A7N8X. You should set FSB to 166Mhz and then set memory frequency to 120% (400Mhz DDR in your case). If you have a good memory you could go up to 150% (500Mhz DDR).
Anyway for best performance I suggest using 2 memory modules (for dual bus memory configuration) and set memory frequency to "Sync".

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&gt;&gt;You should set FSB to 166Mhz and then set memory frequency to 120% (400Mhz DDR in your case).<br />
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No, you should NOT do this. &nbsp;This is BAD advice.<br />
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First, it is well-documented that the nForce2 and nForce2 Ultra400 chipsets perform best when memory is synchronous to the cpu FSB. &nbsp;Even if you have FASTER ram than your cpu's fsb speed, trying to run it faster then the cpu bus actually slows the system down. &nbsp;Any benchmark will prove this.<br />
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Secondly, many people who attempt to do this, or to overclock their RAM as cisi is suggesting (500MHz out of PC3200??) experience instabilities in system operation: &nbsp;sporadic lockups, reboots etc.
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>>You should set FSB to 166Mhz and then set memory frequency to 120% (400Mhz DDR in your case).

No, you should NOT do this.  This is BAD advice.

First, it is well-documented that the nForce2 and nForce2 Ultra400 chipsets perform best when memory is synchronous to the cpu FSB.  Even if you have FASTER ram than your cpu's fsb speed, trying to run it faster then the cpu bus actually slows the system down.  Any benchmark will prove this.

Secondly, many people who attempt to do this, or to overclock their RAM as cisi is suggesting (500MHz out of PC3200??) experience instabilities in system operation:  sporadic lockups, reboots etc.

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can i use 400 mhz ddr memory by say kingston on a supported board of 400mhz but running 333mhz 2800+ amd XP cpu ... board is a A7N8X Deluxe ...
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can i use 400 mhz ddr memory by say kingston on a supported board of 400mhz but running 333mhz 2800+ amd XP cpu ... board is a A7N8X Deluxe ...

can i use 400mhz ddr 3000+ memory with a 333mhz fsb 2800+

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