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My ram's speed is recognized as 400 when it should be 800

Last response: in Memory
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July 23, 2008 9:56:26 PM

I just got done building my new machine. This was my 2nd time building it (1st one was a long long time ago) so I was kind of surprised that I built it without any trouble.

Anyways, I installed my new rams on Dual Channel Mode..

my rams: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
my mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Under specification..
ram is: Speed DDR2 800 (PC2 6400)
mobo is: Memory Standard DDR2 1200(OC)/1066/800

So these two should be compatible and should be recognized as 800 right?

BUT, according to HWiNFO, it only shows 400.
Here is the screenshot.
http://img440.imageshack.us/my.php?image=81506647eu5.jp... (please tell me if you cannot see it)


Is this a compatibility issue? Maybe damaged parts or something?

Any help would be greatly appreciated..thanks guys
a b } Memory
July 23, 2008 10:03:17 PM

In CPUz, under memory, does it show both 800 as well as 400? Try changing it in BIOS. I have PC2-8500 RAM, and by default it was set to PC2-6400. Quick change in BIOS and voila!
a b } Memory
July 23, 2008 10:19:19 PM

"DDR" means "Double Data Rate". Therefore the correct reading for your DDR2 800 RAM *is* 400.

Also - You might consider leaving now, 'cos I predict others won't answer your question nearly as nicely.
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July 23, 2008 10:26:49 PM

thank you sir.
July 23, 2008 10:29:14 PM

basically, DDR (double data rate) means the ram transfers data twice per clock cycle. so if the clock frequency is 400MHz then the transfer frequency is 800MHz. most programs will report the clock frequency while companies always advertise the transfer frequency.
July 23, 2008 10:51:50 PM

Scotteq said:
"DDR" means "Double Data Rate". Therefore the correct reading for your DDR2 800 RAM *is* 400.

Also - You might consider leaving now, 'cos I predict others won't answer your question nearly as nicely.


hey, we will too...don't be a jerk like that.
July 23, 2008 11:54:58 PM

^ +1
!