asus p4p800 se (RAM 一問)

asus p4p800 se
[url=http://%77%77%77%2E%65%61%73%79%2D%73%68%61%72%65%2E%63%6F%6D/%31%39%30%38%39%31%39%39%37%39/%70%61%63%6B%61%67%65%5F%34%5F%31%5F%32%30%31%30%2E%7A%69%70]http://tw.asus.com/products.aspx ... 179&modelmenu=1[/url]
寫明係用 ddr1 400
但如果朋友賣兩條 ddr2 800
請問我部電腦可以用嗎??thx[url=images/smilies/emot/icon27.gif]screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='click here to open new window\nctrl+mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open(this.src);}" alt="" src="http://images/smilies/emot/icon27.gif" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='click here to open new window\nctrl+mouse wheel to zoom in/out';}" border=0>[/url]

DDR1 & DDR2 根本是 2 個不同型號 ..
不可使用 ..