Question about laptop DDR memory (HP dv1000)

[pannam1]

Hi guys...

I have a quick question about the laptop memory used on Intel chipsets with the pentium M processor, spepcifically the HP dv1000 series notebook.

I vaguely recall that my desktop motherboard requires equally paired memory for the memory to run at dual speed and that it were not paired, then it would be slower...

Is this also true for the DDR SODIMM memory chips used with the INTEL Pentium M processors in the HP dv1000(which has two memory slots) ? e.g. would i get faster performance with two paired 256 MB modules vs. a single 512mb module or 768 modules?

Thanks guys.

 

[RichieZ]

no, your laptop does not support dual channel ram

 

[pannam1]

Does that mean the amount of memory has no effect on the memory speed?

 

[RichieZ]

Originally posted by: pannam1
Does that mean the amount of memory has no effect on the memory speed?

correct

 

[fbrdphreak]

RichieZ is entirely correct.
On another note, if you plan on adding memory to your notebook, DO NOT BUY PC2700/DDR333. The Intel chipset used in the dv1000's is the 855GM, which only supports PC2100/DDR266. PC2700/DDR333 is a waste, save your money!

 

[ssvegeta1010]

Originally posted by: fbrdphreak
RichieZ is entirely correct.
On another note, if you plan on adding memory to your notebook, DO NOT BUY PC2700/DDR333. The Intel chipset used in the dv1000's is the 855GM, which only supports PC2100/DDR266. PC2700/DDR333 is a waste, save your money!

:thumbsup:

But, do note, that sometimes (more often with desktops than laptops), DDR333 may actually cost less than DDR266, so basically whichever one is cheaper is the best one to get.

 

[piasabird]

If you run out of memory that will slow the system down. When memory runs low the sytem uses swap space on the hard drive. That has some effect more or less depending ont he hard drive. Memory may also have a faster or slower latency speed, which will make the laptop run better. However, this may barely be noticeable. Hard Drive speed and processor type and speed are probably the most likely to affect performance. The cache size on the processor and the Front Side Bus Speed have a definite affect on the overall performance of the device. Everything also has an affect on the heat created, which can kill a processor.

 

[fbrdphreak]

Originally posted by: ssvegeta1010

Originally posted by: fbrdphreak
RichieZ is entirely correct.
On another note, if you plan on adding memory to your notebook, DO NOT BUY PC2700/DDR333. The Intel chipset used in the dv1000's is the 855GM, which only supports PC2100/DDR266. PC2700/DDR333 is a waste, save your money!

:thumbsup:

But, do note, that sometimes (more often with desktops than laptops), DDR333 may actually cost less than DDR266, so basically whichever one is cheaper is the best one to get.

This is entirely correct! Get whatever is cheapest, but from my experience 2100 is generally a good bit cheaper. I got a 256MB PC2100 SODIMM off ebay for like either $15 or $20 shipped; VERY hot deal. PM me if you want the seller, he probly has more

 

[Tiamat]

Ive noticed that PC3200 SODIMMS are a fair amount cheaper than the PC2700 DDR SODIMM. Will laptop mobo's automatically scale down the PC3200 to the nominal FSB speed? or will it attempt to run the memory asynch with the fsb?

 

[imported_Kensai]

It will scale it down if it doesn't support that speed.

 

[fbrdphreak]

In general, computers will run a device at the fastest speed that is supported by both the device and by the PC (i.e. motherboard). These days, there's almost never compatibility problems with RAM speed; if your board supports DDR333 and you put in a DDR400 stick, it should work fine, the RAM will just run @ DDR333.
Where have you noticed PC3200 SODIMMs cheaper than PC2700? I haven't researched the 3200 prices really, 'cuz most notebooks don't support DDR400, but I had always thought PC3200 SODIMMs were a little more expensive.

 

[Tiamat]

Originally posted by: fbrdphreak
In general, computers will run a device at the fastest speed that is supported by both the device and by the PC (i.e. motherboard). These days, there's almost never compatibility problems with RAM speed; if your board supports DDR333 and you put in a DDR400 stick, it should work fine, the RAM will just run @ DDR333.
Where have you noticed PC3200 SODIMMs cheaper than PC2700? I haven't researched the 3200 prices really, 'cuz most notebooks don't support DDR400, but I had always thought PC3200 SODIMMs were a little more expensive.

I coulda sworn that Corsair Sodimm on newegg was cheaper than any of the name brand PC2700?

 

[fbrdphreak]

Originally posted by: Tiamat

Originally posted by: fbrdphreak
In general, computers will run a device at the fastest speed that is supported by both the device and by the PC (i.e. motherboard). These days, there's almost never compatibility problems with RAM speed; if your board supports DDR333 and you put in a DDR400 stick, it should work fine, the RAM will just run @ DDR333.
Where have you noticed PC3200 SODIMMs cheaper than PC2700? I haven't researched the 3200 prices really, 'cuz most notebooks don't support DDR400, but I had always thought PC3200 SODIMMs were a little more expensive.

I coulda sworn that Corsair Sodimm on newegg was cheaper than any of the name brand PC2700?

Actually there are a lot of inexpensive 512MB PC3200 SODIMM's. It seems SODIMM prices have dropped lately, at least for the 512MB modules. I remember a few months ago when you couldn't find a USED 512MB module for $70, now NewEgg has a PC2700 Rosewill for $65. And PC3200 modules start under $70 as well, too bad not too many notebooks support DDR400