i have been tracking this dual channel matter for sometime now in zv6000forums, notebookreview.com and this forum. and despite the simplicity of the issue, some people just do not seem to get it. i am a person of no more than average intellegence, so i am going to keep it as simple as possible. this issue is not about performance. before i go on, let me repeat it so it can sink in a bit... IT IS NOT ABOUT PERFORMANCE!!! it is about honesty and integrity. socket 939 came out pretty much to accomplish one thing and one thing only, and that is to "upgrade" socket 754 lack of dual channel capability. that's it! it is about as simple as that. true, HP never indicated the presence of dual channel. consequently, taking into consideration the last 2 statements, most people did what anyone with half a brain would do -- contact HP. check out zv6000forums.com, and you will find tons of people who were told the same thing: as long as there is a pair of matching sodimms, it will be running in dual channel mode.
so lets recap. you have a socket whose biggest purpose is to support dual channel mode, and you have a desktop CPU & chipset that supports it as well. basing my guess on the many exchanges with HP that were posted on zv6000forums.com, it looks as though HP ACTIVELY disabled dual channel capability (notice the emphasis on the word "actively"). is there anything wrong with the very action in itself? absolutely not. is there anything wrong with the fact that HP never ACTIVELY notified the public? absolutely! what is the point of disclosing the number of cylinders in a car's manual, if there is a huge V6 plaque on the side. yet manuals state it, nevertheless.
you could not be more wrong. most people who want performance (gaming aside), will, in fact, buy r4000/zv6000 simply because no other notebook will give you the most bang for the buck. but the fact that most people do not know what dual channel is does not give any company a right to lie to them. if i call up Gateway and ask them whether their 754-based 7510 supports dual channel, what do you think they will say?
what if HT was very important to you, so you decided to contact you notebook manufactorer and clarify the lack of HT on the intel sticker. imagine if their response was something along the lines of "it is a just a sticker. this notebook does support HT". so you went ahead and purchased it only to discover that it does not.
i want you to understand that no one was comparing performance increases of dual channel versus HT. what was being compared, however, is the concept of deceipt. a rather large number of people were flat out lied to. but since you mentioned performance, talk to people who know about 64bit OSs, and the effect dual channel has on their performance.
do you happen to know how to tell whether a r4000/zv6000 supports dual channel like a particular bios version that should be looked for during the bootup, or a serial number?
as for everyone who were lied to by HP, i am sure that you have heard of a little story about a woman who rescued a frozen snake from a block of ice, only to die from its bite. and as the woman was dying, she asked the snake why it bit her after all that the woman did for her. to which the snake replied "hey, b!tch, you knew i was a snake". HP is a typical enormous US conglomerate, whose top dogs would sell their first borns just to maintain their bottom line and staisfy stockholders. such entities tend to comprise their "technical support" departments out of people who barely made it through highschool. if they had higher education, they would not be answering phones for a living.