Does i915PM work with PC-5300 (DDR2-667 MHz) memory?

I plan to upgrade memory on my Toshiba Portege S100. Does it work only with DDR2-533 (PC4200), or I can use PC5300 too? Does it affect performance?
In other words, if I buy "1GB PC5300 667Mhz DDR2 128x8 SODIMM Notebook Memory 2.5 Volts CAS Latency CL5, unbuffered, Non-ECC" will it work at all, at will it work as fast as "1GB PC4200 533mhz DDR2 SODIMM Notebook Memory Module - Cas Latency 4"? Will the PC5300 work with CAS4 in my system?

 

Just check if the pin numbers are same.The new ram will downlock itself to the system clock speed.

 

it should work,, but will only run at the 533 speed,,, even i940 chipsets only support the 533 Mhz speed,, so i can't see a i915 supporting anything past 533,, but you will get benifits from the LOWER LATENCYS.... a CL5 at 667 should have a latency of CL4 at 533 so it will be the same speed... not faster,, not slower

later,
bigO

 

Big O hit the nail on the head.
You can upgrade to the higher speed pc 5300 (667Mhz). The memory will downclock to pc4200 speeds (533Mhz) but the cas latency of the memory will also decrease, so the memory will be effectively faster than standard pc4200.

I have pc5300 running on my intel 945pm chipset, and the system is running it at pc4200 speeds, but at a low 3-4-4-10 timings.

K-TRON

 

Thanks. Did you try it, or it is all just assumption?

 

my laptop only requires pc4200 ram,, but i put PC5300 in when i upgraded to 2G,,, and glad i did,, cause when i upgraded my CPU... the RAM BUS stepped up to 667 to match the new CPU!!!

don't own a i915 based laptop,,, but those are pretty hard facts,, and if K-TRON agrees w/ me then i can say it is more than assumption,,,, it is KNOWLEDGE.... and that is what will happen,,


always buy the fastest RAM with the LOWEST latencys that will work,,, it might be useful in a new system down the road...

wish i had some of that 3-4-4-10 ram K-TRON gots.. or did you mod the timings to get that 3 in there K-T??

later,
bigO

 

Have 2 gb of Crucial pc5300 in my E1505, its just what the system underclocks the memory too.

All ddr2 memory is backwards compatible, so you can even put pc6400 into your system and it will downclock to pc4200 speeds.
The same applies for ddr sodimm memory.
I have 2gb of pc3200 stock 3-3-3-8 timings in my dell 8500.
The system chipset can only recognize pc2100 speeds, so my memory downclocks from 400Mhz to 266Mhz and the timings drop all of the way to 2-2-2-6.

K-TRON

 

Thanks a lot.
What about that strange 2.5V in the seller's spec for PC5300 SODIMM. Shouldn't it be 1.8V?

 

yes, it should be 1.8v
I have 2GB of Corsair Value PC2-5300 in Acer 2428 which uses i915 chipset.