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January 19th, 2005 16:00

Latitude 333MHz memory: What do you expect?

Hi all,

The following Dell notebooks are (as of 1-19-2005) advertised to come with (Intel® Pentium® M Processors and) 333MHz memory, (as compared to, in tables, to 266MHz memory for other models).

Latitude: D505
Inspiron: 700M, 8600, 9200
Precision: M60

Would you expected, given the comparison, that your memory would run faster? If these systems were design to take advantage of the full performance capabilities of the components, the 333MHz memory (PC2700) should be able to benchmark at near 2.7 GB/s as oppose to 2.1 for 266MHz memory. That's an increase of .6/2.1=29%. You most likely paid for that increase.

Whether or not you have any of these systems, please feel free to get your opinion as to what performance you would expect, given the content of their web pages (see below for how to get to web pages):
A. 333 MHz systems would have BETTER/FASTER memory
performance than 266MHz systems
OR B. 333 MHz systems would have the SAME memory
performance as 266MHz systems

If you have one of the above systems, I hope you can run a benchmark program to verify you memory performance (not cache, but main memory performance). If you have not, I can tell you the benchmark that I ran under windows XP Professional:
SiSoftware's Sandra 2005 Lite (The "Lite" version is the free version)
Their main web site is: http://www.sisoftware.net
There are many download sites to choose from (which is a bit of a concern) so have you security software watching.

Under Linux, I used the "streams" benchmark:
http://www.cs.virginia.edu/stream/

If you don't get what you expected, perhaps the list and Dell would find that interesting....
My finding are, for the M60, that the 333 MHz memory is running at 266MHz. This has been acknowledged by Dell. They seem to disagree with me that there specs. on the web are deceiving. I recently tested an Inspiron 9200 and found that it's 333MHz memory is also running at 266. (I haven't talked to Dell about that.)

Dell (at least one tech support person) thinks that as 333MHz memory is getting more available, customers just want to know if they can use it -- no performance increase is implied/stated.
What does this community forum think?

Below is one way to get to the various notebook specs. Note: there are paths to get to the specs from any of the categories:
o Home & Home Office
o Small Business
o Medium & Large Business
o Government, Education & Healthcare

To get to the table for the D505:
www.dell.com
--> Small Business
--> Notebooks
--> Choose Latitude
To get to the table for the Inspirons:
www.dell.com
--> Small Business
--> Notebooks
--> Choose Inspiron
--> scroll down and click on
"Product Details" under any
of the Inspirons models
--> Learn More(next to Memory)
A new window will pop-up
click "Details"
For the M60:
www.dell.com
--> Small Business
--> Notebooks
--> Choose Precision Mobile Workstation
--> Learn More (next to Memory)
A new window will pop-up
click "Details" THIS ONE ACTUALLY
SAYS 2.7 GB/s! (at least it did on
1-19-2005)

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February 21st, 2005 00:00

Yeah what's going on... The PC2700 (333Mhz) RAM in my wife's Latitude D600 runs at 266Mhz (according to the BIOS and Sandra) and there doesn't appear to be anything I can do about it. RAM running at 333Mhz definitely DOES make a difference - I've run bencharks in my Asus M6Ne, configured exactly the same, and there is certainly a significant gain in MB/s to be had with the faster RAM.
 
Never again will I buy a Dell - it's been one problem after another!

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February 21st, 2005 03:00

But the D600 is only spec'd to run at 266. You can "expect" to only see a couple of percent improvement running
333MHz _capable_ memory in a 266 MHz system. In the case of the D600, it can be viewed as a bonus that the system will accept the PC2700 mem. as in the near future it is probable that it may be less expensive than PC2100; this is for the case where one wants to replace PC2100 memory to get an increased amount of memory (i.e. higher density modules).

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February 21st, 2005 19:00

Hrm, why is it that Dell would make a machine with the 855PM chipset (which obviously supports PC2700 RAM at 333Mhz DDR) that is limited to PC2100 speeds?
 
What a piece :smileymad:

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1.5K Posts

February 22nd, 2005 02:00

Ron wrote"...in the near future it is probable that it may be less expensive than PC2100..."
 
PC2700 is already cheaper than PC2100.
 
My new D800 was shipped Sept. 1, 2004 with one 512MB 333MHz module (PC2700), to which I added one 512MB 266MHz (PC2100) module, this was also only recommended memory on Dell's D800 upgrade site (same on Crucial).
 
Now after five months of unexplained BSOD's (every two to ten days), they stopped as soon as I removed the PC2100 module.
 
I had to order from Dell's P69 (PC2700) upgrade site to find PC2700 (which was $50 less than PC2100 on D800 site for 1024mb) and installed that in my D800.
 
Completely BSOD Free now for one month.
 
The just introduced D810 shows that it can use 400MHz (PC3200) RAM but the D800 will only operate at a maximum 266MHz even though processor has a 400MHz FSB, the limit is apparently soldered to the mainboard.  At least 333MHz modules run at 2.0V (instead of 2.5V) when operating at 266MHz which may allow cooler, longer running.
 
Dell should really warn customers about that trap set when they installed PC2700 on units that were expected to use PC2100.
 
Art

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