DDR3 1600mhz

Looking at ddr3 1600mhz ram... will i have a problem using this ram in my Alienware m17x?? Using ddr3 1066 at the moment, or should i stay with in the specs of the unit which is ddr3 1333mhz...Thanks all

Marc

 

I would assume it would work but yes the specs specifically state up to 1333 DDR3 so who knows the bios might treat it as such.

 

Thanks for quick reply...Iwas told that it will prob ramp down to 1333... unoverclocked...thanks..

Marc

 

The M17x can go beyond 1333. The question will be the timings. 1600Mhz may be faster than 1066Mhz or 1333Mhz but if your timings are high it will definitely perform slower.

 

I didnt know they even made 1600mHz laptop ram yet... interesting.

If it works in any way like the gateway i have then if you run RAM with too high a speed it downclocks it to the fastest speed allowed. (my case it was 800mHz to 667mHz) but on the up side it tightened the timings so i ended up with some nicely timmed 667 RAM in the end.

It might happen the same way with the 1600 to 1333, but since there isnt much available 1333 with better timings i'm not sure if you would be better off or not

 

There is CAS5 1066 DDR3 memory and CAS7 1333 DDR memory AND if you run the 1333 at 1066 speeds you can achieve CAS5. Thanks to Kingston.

 

nice... most everything i've found in the 1333mHz department have been CAS9.

Ah, new system new things to learn lol

I'll have to check that CAS7 1333 ram out then.

 

Considering that without overclocking the max RAM speed on the M17x is 1066MHz due to the FSB, 1600MHz is about as pointless as 1333MHz, unless your processor can overclock like CRAZY.

 

That's not how it works. I had a thread here long ago talking about this with people debating, it was great. Need to find it. lol!

 

RAM speed is independent of FSB.

 

I'm thinking of upgrading my memory once I get my system too. I see 1600MHz hyperx CL7's on newegg for $145. Would this scale down to a better CL at 1333?

 

All the hyperx 1600 kits will run at 1333 cas 9

don't bother with them as the nvidia chipset does not use xmp

get the non xmp 1333 cas 7 kit for best results

 

Ok so even if the RAM is listed as 1600 cas 7 because the chipset doesn't support XMP it will only run at cas 9? Also there would be no scaling advantage going to 1333?

So should I go 1333 cas 7 or 1066 cas 5 instead?

Just want to make sure I buy the right stuff.

 

This is the right stuff.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820104158

The 1600Mhz XMP memory would be slower than this memory. If you buy the 1333 memory and run it at 1066 your CL will go down also.

 

Great thanks for the info. I was also just reading the spec sheet and I now see that the SPD would be 1333 cas 9 and with no way to easily tinker with timings that wouldn't be good.

Ok so 1333 cas 7's it will be.

Thanks guys!

 

glad we could help

 

Dang price went up 20$ while I was contemplating buying it. Now, i'm paying a premium.

haha. Mine just got to my sister today

 

and now it's sold out. Seems to always happen when we post it THEN when it comes back the price goes up. When I first bought this is was $99, I guess that was a bargain.

 

Whoa, ok then i'm glad i got mine in there, LOL! sis just sent me a picture of them in NYC so far away

 

Oh woot she wants to ship it over to me via her company mail room =D

Hooray for DDR3 Ram!

 

I also paid 100 even. But I think I was the first to get them

 

They ran out as I was buying it this morning. Literally, it was in my cart and shortly after I got a message that it was out of stock.

I imagine they could raise the price easily since the nearest competing price was $140.

 

So Basically the DDR3 1600mhz production were a mistake? Because every answer regarding this DDR3 1600mhz is pretty much a negative. Why would memory manufacturer produce them anyway? Or what can it be use for ?

 

The real question is why would a manufacturer make XMP ready memory for laptops when laptops cannot take advantage of it?

 

true that, the XMP really had me confused.....I can think of only 2 laptops to utilize it....the M15x or the D900f

 

Since the M15x "can" actually utilize XMP, but can only have a maximum of 1600MHz, does that mean that it will lower the timings? I am buying memory for my M15x and I was going to buy the $99.99 1333MHz Kingston, but now that its more expensive I am thinking that I might as well buy the 1600MHz Cas 7 Kingston memory.

 

I cannot say for sure that the M15x will support XMP, but it may being an Intel chipset

 

If that's the case what's the point of the FSB? Are you saying ram has it's own pipeline to the processor that runs as fast as the ram can go? Is there no memory controller?

 

Never knew that. Do you know anyone that has XMP working with those two systems?

 

the Kingston HyperX (Last one on Newegg till december ) will get to me tomorrow

 

I just listed those as they are notebooks that will utilize ddr3 and an intel chipset. I am sure any PM55 notebook may be able to do it. Most likely though, the D900f as the X series chipset should be able to use XMP. (may need XTU to do this though - unless the BIOS is designed to use it)

 

http://en.wikipedia.org/wiki/Front-side_bus

 

Anyone tried the Kingston Hyper X DDR3 1600 C7 in the M15x yet? In theory this should be the best ram for the M15x, but the SPD is the limiting factor since apparently the M15x is not using XMP profiles? "The SPDs are programmed to JEDEC standard latency DDR3-1333MHz timing of 9-9-9"
I'm referring to the KHX1600C7S3K2/4GX. Let me know if anyone has tried these sticks yet!

 

You are right. XMP is the reason to avoid them.

 

So i guess AW hasnt used any of the XMP profiles... thats understandable as its an addition to JEDEC instead of being a main part, but it would have been nice to eventually see DDR3 2000 sodimm for the i7 systems

 

Has anyone tried an XTU with the extreme processor and the XMP ram? Just spitballing now......

 

Technically I should be able to with the M17 shouldn't I. I still have 4GB of XMP memory.

 

Maybe, give it a go. Word on the street is you need an extreme cpu installed and the OCZ/zFactor Bios though, not an AW Bios.

 

Then I'd have to pull my QX9300 from my M17x. I was planning on doing more of that kind of testing over the break.