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Pavilion dv4000 overclock... - Page 2

post #21 of 26
11/4/05 at 5:19pm
Quote:
Originally Posted by funnyperson1
My guess is that the previous description was wrong, I don't see how its possible to run dual channel with different sized sticks of ram.
This is a big mess . I remember I read that zd8000 supported Dual Channel without the need to match the memory sticks, now it says that you DO need to match the sticks. So, WTF is going on??? I'm getting a little dissapointed with HP . However, their printers are just great and those notebooks have very nice configurations with a very reasonable price. I just think they should train their tehcnical support guys a little better.

Anyway, I'm goin to buy 1GB DDR2 PC4200 stick from newegg.com. I will be sad if the laptop doesn't run in Dual Channel, altough I've read that the improvement of Dual Channel is just about 10%.
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post #22 of 26
11/4/05 at 5:30pm
Quote:
Originally Posted by Ericko
This is a big mess . I remember I read that zd8000 supported Dual Channel without the need to match the memory sticks, now it says that you DO need to match the sticks. So, WTF is going on??? I'm getting a little dissapointed with HP . However, their printers are just great and those notebooks have very nice configurations with a very reasonable price. I just think they shuold train their tehcnical support guys a little better.

Anyway, I'm goin to buy 1GB DDR2 PC4200 stick from newegg.com. I will be sad if the laptop doesn't run in Dual Channel, altough I've read that the improvement of Dual Channel is just about 10%.
Yea, the technical knowledge of their tech support people seems to be lacking. Being able to mix and match stick sizes and still have DC work goes against the how dual channel works.

Dual channel functions by treating the memory bus as being 128bits wide rather than 64. It does this by being able to adress both sticks at the same time (each stick is 64bits wide). To be able to mix and match sticks the memory controller would have to address the ram on a chip by chip basis rather than a stick by stick basis, and I don't believe thats possible.

I wouldn't sweat too much about performance loss, it won't be that big (I'm thinking the dv4000 would be gpu limited anyways). However, it isn't too much more expensive to get two 512mb sticks and you could keep your stock sticks in the cupboard.
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post #23 of 26
11/4/05 at 5:43pm
Quote:
Originally Posted by funnyperson1
Yea, the technical knowledge of their tech support people seems to be lacking. Being able to mix and match stick sizes and still have DC work goes against the how dual channel works.

Dual channel functions by treating the memory bus as being 128bits wide rather than 64. It does this by being able to adress both sticks at the same time (each stick is 64bits wide). To be able to mix and match sticks the memory controller would have to address the ram on a chip by chip basis rather than a stick by stick basis, and I don't believe thats possible.

I wouldn't sweat too much about performance loss, it won't be that big (I'm thinking the dv4000 would be gpu limited anyways). However, it isn't too much more expensive to get two 512mb sticks and you could keep your stock sticks in the cupboard.
The problem is that I'm going to buy a 3 year extended service plan, so, If I remove the stick that is hidden under the keyboard, I'll lose the warranty. Whatever, maybe later there will be a bios update that will support Dual Channel with mixed sticks.
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post #24 of 26
11/14/05 at 4:15pm
Technically, it is feasible to have dual channel with unmatched memory. I found at least one chipset is supporting it. While I have not heard anything about Intel's chipset supportting it though. My original information was from HP and now that they have changed their info. This may mean either their earlier info was wrong, or it is not a universal feature for all this line. So far, all the memory test showing dual channel in my 1GB+256MB configuration. I am going to run the memtest again later this week with (a) the 256MB removed, and (b) the 256MB replaced with another Transcend 1GB. This test will show whether the 1GB+256MB is running at single channel, dual channel, or somewhere in between. Stay tuned.
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post #25 of 26
11/14/05 at 5:17pm
I cant wait for the result...
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post #26 of 26
10/13/11 at 4:19pm

i have an hp pavillion dv4000. i believe the new one. it runs on 2.00 ghz instead of 1.73 and has 1 gb of ddr2. it has the pentium m 760 processor. i cannot find the pll # for it though and i need it to overclock and i need to install a cooling fan also any tips. ihave a cooling pad but it still gets really hot.

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