RAM: 1333Mhz vs. 1066Mhz in M17x

It's 1066 CAS 7 vs 1333 CAS 9...

Some applications have bigger benefits of the lower CAS an some of the higher clock so one will win in one program and the other in another.

Don't exist a winner here.

 

mm..what of gaming apps?

 

So far FC2 look to be the unique game where you will see any benefit of faster ram...

Basically for every game out there you can use 2000mhz memory and will notice 0% fps increase.

 

So it's possible then, that those who ordered the 1333mhz ram will have an easier time over clocking using the FSB ONLY, than others who took 1066mhz ram, because they don't have to worry about memory errors from ram being clocked too high as the max FSB is 1333 on this board, and they wont have as many possible instability problems from overclocking via dividers while having the 1066mhz ram unlinked and locked, am I correct?

 

Wrong.

1333 / 4 = 333

333 * 2 = DDR 666

Linked in M17x ISN'T 1:1... It's using 1:2 divisor.

 

Ok good, so I should be able to over clock my CPU quite high if its a good chip without any instabilities with my 1066 ram then right?

 

At least the same you can with a 1333 ram.

TBH the perfect would be a DDR2 ram which you can run 1:1 without losing much clock and have low timings.

DDR3 was not made for Core 2 platform and isn't a good idea for C2...

To run your 1066 memory 1:1 you have 2 options:

Overclock your processor FSB by 100% (266 x 2 = 533 x 2 = 1066).

Underclock your ram by 100% (533 / 2 = 266 x 4 = 1066).

The unique point in getting 1333 ram would be performance but performance increase is NOTHING, NADA, NIENTE (in i7 at least you have 5% increase lol).

 

But what about the other way around? 1066 having better performance? taking in hand the latency

 

JEDEC standard modules
Standard name Memory clock Cycle time I/O Bus clock Data rate Module name Peak transfer rate Timings
DDR3-800 100 MHz 10 ns 400 MHz 800 MT/s PC3-6400 6400 MB/s 5-5-5
6-6-6
DDR3-1066 133 MHz 7.5 ns 533 MHz 1066 MT/s PC3-8500 8533 MB/s 6-6-6
7-7-7
8-8-8
DDR3-1333 166 MHz 6 ns 667 MHz 1333 MT/s PC3-10600 10667 MB/s 7-7-7
8-8-8
9-9-9
10-10-10
DDR3-1600 200 MHz 5 ns 800 MHz 1600 MT/s PC3-12800 12800 MB/s 8-8-8
9-9-9
10-10-10
11-11-11

 

In short...?

I'm nowhere near experienced enough with RAM to differentiate with this given information, which would be better in our 1066 FSB situation xD

 

For some applications...

You will have a better performance in winrar with 1333 and a better performance in compiling with 1066...

Nothing expressive .

A interesting thing would be test FSB 400 1:1 with ram... It would work at CAS 5 and could be better than 1066 CAS 7 (in some applications again)...

But we would need SetFSB/more FSB in bios and more voltage .

It's the JEDEC standards for DDR3

JEDEC Solid State Technology Association is who do the standards for RAM... They say the standard clocks, latencys, etc .

 

What if you plan to overclock your CPU

I've been reading that if you do plan to overclock, keeping the FSB & RAM at 1:1 is recommended

...any truth to that?

 

Generally you got better performance and more stability when running 1:1... But depends on motherboard and need to be tested in M17x.

Just to remember...

1:1 @ FSB 1066:

1066 / 4 = 266 x 2 = DDR 533

1:1 @ FSB 1333:

1333 / 4 = 333 x 2 = DDR 666

Running 1:1 is almost impossible with DDR3 :/

 

But the technology of DDR3 makes up for it...right? :>

And overall, I can't tell which would be better to overclock with....if you had to choose one (price aside....and your sig aside xD), which would it be...and if you could give background reasoning as to why, thatd be awesome

 

DDR3 was not made to be used with FSB... The clock is high and latency too...

You can run it 1:1 but will lose a lot of performance because of high timings...

1:1 will be only viable if anyone use 400++ FSB (using setfsb or something)

You mean 1333 vs 1066?... It's basically the same but i would take 1066 because compiling prefer lower timings over faster clock.

 

guhhh

choosing between the two is difficult xD

 

Theres NO difference just pick 1066.

 

But..but...what about the other components of the computers, aside from the CPU that would make use of the RAM?

EDIT: and what is this "underclocking" bru-ha-ha I read about on another forum?

 

Man nevermind...

U aren't trying to make a decision u r simply searching for reason to go with 1333mhz.






























"underclocking - The deliberate reduction of the speed, often to reduce power consumption"

All the games r CPU bound at this resolution/configs... In real life the difference will be 0%.

And u r going to notice difference only in synthetic benchmarks (like superpi, everest bandwidth, sandra bandwidth).

Compare 1333 CL9 with 1066 CL7 (thats what we got in M17x).

The unique component in M17x what use shared ram is 9400m and the difference will be just like in this benchmarks (bandwidth is always bandwidth).

My job is done here.

 

usually doesn't afftct speed unless you undercock it way to far ... which would make it bsod if anything


i already told you how i feel about the ram

 

I thought Mandrake said the 1333 was CL8 from his cpu-z charts.

And yes, you're basically done here; you've been amazingly helpful (and tolerant of my stubborn questioning xD), no doubt I'm going to +rep you, zfactor, and mandrake.

I just wanted to know which would be most useful to overclock with, and after reviewing all posts, it would be the seem to be the 1333 (even though the difference is minimal & barely noticeable).

 

Mandrake ram was running at 1200 so it apply the CL8 latency but it's CL9.

Actually the difference between 1333 and 1066 for overclocking is 0%.

U r not going to run 1:1 with 1333 (if you run your FSB @ 1333 and your ram @ 1333 it's 1:2... u r using divisors) or with 1066.

In overclocking there isn't a minimal difference...

Theres no difference AT ALL

 

I was meaning frequency but well

 

I've been OC'ing with the 1333 memory and syncing the mem and fsb speeds. That has given me the greatest stability. I did order 1066 memory to see if there is a difference with the M17x. I doubt I will see any in the benchmarks but I'll find out.

 

Oh wow awesome, just for the sake of testing?

keep us posted

 

For my own benefits also.

 

agreed with you i have tested both and with my old whitebook i was for a fact able to run stable at 3.3 with the 1333 ram i COULD NOT do this with the 1066 stuffi got to 3.06 then bsod no matter what i did. i swapped the ram and was right in at 3.3

 

was that linked or unlinked?

 

If I experience the same thing then I will find out right away. I'm running at 3.46Ghz right now with no issues. I have the memory freq set at 1200.

 

Actually u r running 1:2 so it's not sync .

And this don't have nothing with the fact that whitebook always run at 1:2 yeah?

 

I've been doing the tests this morning and so far I have not seen a difference. Cl continues to depend of what speed your memory is running at and other clocks are adjustable through ntune. So far the only difference is the default memory speed in the Bios.

 

they are? i didn't see that option in ntune

 

I'm just referring to this.



Meaning I can change my tRAS, tRCD and tRP but not the CL.

 

whao. i didn't see that. brb. i just installed win7 i'm going to look see. (i have to download it first.)

 

I might have to quickly take my last statement back. Try'ing to OC my GPU the same way I was doing it before doesn't seem to work as well. I can't get Vantage to run. I'm going to put my old memory back in and see what it does.

 

i would help you out on tweaking your ram. but i keep blue screening when i accept the license agreement

 

Windows 7? Which version of Ntune are you running?

 

yeah windows 7
http://www.softpedia.com/get/Tweak/Video-Tweak/nVidia-nTune.shtml
nVidia nTune 5.05.54.00

 

I think I'm getting confused with the tools. They're all starting to blend together after playing with so many.

 

yeah i'm downloasding nvidia system tools also to see if i can accept there liscence agreement.(which it should)

 

Movin' this convo back to the benchmarking thread since that's what this is really about anyway.

 

If you want to change he TCL just edit it with Thaiphoon and flash it.....Already done to get a stable 1333 CL7.

 

Got a how to or is it straight forward?

 

I went to install the trial to look at it and it doesn't look like it has support for Vista 64. Which OS are you running?

 

32bit system....I think you can try at boot press F8 to disable driver signature.

 

Last couple times I tried that I BSOD. I could always load up XP on another hdd.

 

why does the M17x support 1333mhz memory if the processor bus is only 1066?

can the memory operate faster than processor/motherboard bus speed?

I am curious on upgrade options and not sure i understand how these 2 different memory speeds work on this new laptop system.

thanks

 

think of it like a desktop (board is a 750 nvidia sli i believe) 1066 by 1.25 in bios equals 1333(not linked) . I would not buy 1333 ram as it makes no difference. spend the 50 on different upgrade.

 

mandrake suggests the 1066 is less stable OC-wise...I think

 

So far from limited testing 1066 is less stable when OC'ing the GPU while the 1333 is less stable when trying to tighten the memory timings. I'm waiting for BIGX333 to come back from his hiatus to make some suggestions.