I'm equally unsure of what you are asking?
But I'll have a guess
The Gigabyte GA-K8NS is a socket 754 (Athlon64) motherboard so does NOT have dual channel memory controller.
What this means is that there is know benefit from fitting a matched pair of memory modules for the purpose of "Dual Channel" enhancement.
Naturally your original 256mb strip would have been only just adequate (enough) capacity for basic computing, any memory intensive applications would have soon used up what little spare memory was available causing "page filing" (the temporary use of the hard drive) which as you doubtless know slows down the system dramatically.
Fitting the extra 512mb gives your system the reserve memory capacity needed to run smoothly with memory hungry applications and prevents the need for the system to call upon the hard drive which naturally (because it is mechanical and many times slower than flash memory) slows things down.
As for outright speed: the perception is more memory more speed, the reality is once the optimum amount for your use is exceeded there is little gain. That optimum depends on applications used but for the average office/surfing PC that is around 512mb, so in your case the real benefit was taking it away from the minimum required (256) and over that 512 threshold, 768 is indeed a nice amount to have for the average user.
There are however many instances where even 768mb is insufficient, heavey hard core gaming, graphics and video editting may require one or even two gig to run at there optimum.
As a side note* and I think you may have been hinting at this?
64bit Windows Vista is rumoured to require an absolute minimum of 512mb to run with a recommended 1gig average to work comfortably, this really ups the anty and most uses choosing to move to Vista will have to buy more memory at the same time.
Martin
Martin
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