Clarification: Can the i5-460M handle 1333Mhz DDR3 RAM?

I've been looking through the net for some info regarding this processor since I'm planning on buying one with this inside. I'd also like it to have the fastest/most RAM available since I do heavy video/post processing edits most of the time. I've been looking into the faster DDR3 RAMs that run at 1333MHz, but I'm not sure if the 460M can handle it. While Ark Intel says here that the speeds are only for 800-1066MHz, there's actually a laptop here (and actually more in Google search) that show the processor in a config with 1333MHz RAM's.

So, what is it, really?

 

If I remember correctly, the Arrandale platform only supports up to 1066MHz RAM. You can use 1333MHz but it will downclock it to 1066. So it can easily "handle" it, it just wont run it at that speed.

 

Oh. Fair 'nuff. That's a shame, though.

 

One thing to remember though, is that 1333MHz RAM typically has a higher CAS latency than 1066. So even if you could take advantage of the full speed it would be slightly offset by the slower timings.

 

freq > timings. in real world apps there would b zero difference anyways between the 2.

 

I believe i3/i5 mobile support up to 1066, i7 1333.

 

I did say slightly offset. I was just trying to make the point that given the difference it probably wouldn't be worth getting the higher clocked RAM right now. In the future I could see it becoming more viable though.

 

The difference is so little it would even be worth spending $30 on it. No need to upgrade in the future.

 

Not according to Intel.

 

Well, regardless though, DDR3 will still be an upgrade from the DDR2 setup that I have. It's gonna be good for editing, right?

 

Quoted for the truth

 

No, DDR3 won't show any noticeable benefits as compared to DDR2.

 

Wait till you use Vegas / AE for RAM renders, my old DDR2 800 rig was noticeably slower than my current DDR3-1333 despite DDR2 having lower latency.

Speed > latency if you video edit.

 

And this is what exactly I do. So, yeah, DDR3 for these, then.

 

if your using prpro, ae, power director, vegas pro you will notice the difference between ddr2 and ddr3; esp in ae.

 

All the Clarksfield Core i7s have native 1333 DDR3 RAM support. Arrandale do not.

 

I guess I should have said quad core... but that's Clarksfield isn't it?

 

basically that's it... DDR3-1333MHz RAM is better for ocing so i'd get an i7 anyways ..

 

Clarksfield is the first desktop i7/i5, built on 45nm. Clarkdale is the desktop version of Arrandale. The link I posted is the i7 Arrandale.

 

Clarksfield is Nehalem quad core for mobiles.

 

Oh you're right! Those are the ones though that have no integrated graphics on chip, and are built using 45nm process. I was close though!

 

Your new computer being faster doesn't have anything to do with going from DDR2 to DDR3 though.

 

There is 2 i7.
First is i7-620M Arrandale type which uses 1066MHZ
the other is i7-XXXQM Clarkdale i7 which uses 1333MHZ
IIRC the CPU uses different socket so don't bother.
I remembered wrongly, they use the same sockets.

 

It uses the same socket. The desktop segment is split into two sockets, 1156 with dual channel memory and Pentium, i3, i5, and real i7's, and 1366 with triple channel memory and only i7's.

 

As stated above, memory speed has no effect on performance since it is never the bottleneck.

 

Well the laptops I'm currently weighing on are all Acers--namely the three TimelineX laptops, 3820TG, 4820TG and 5820TG, all with either the i5 460M or the i7-640M which isn't a quad. Thing is, for my price range I can't see any with the quad i7's, not to mention those quads don't have the integrated Intel HD graphics--long battery life is also a must for me since I also do papers for school.

Aw, man, if only I can have more than one laptop. Lol.

 

Quads sould have the integrated graphics with sandy bridge due out Feb/March 2011. although in the 3820TG or 4820TG I wouldn't trust the heat dissipation in one of those smaller form factors for a quad core.

 

620m is more of an i5 than an i7.

(today i5 or i7 means dual core or quad core i series)

edit: maybe I should finish reading the thread

 

I was quite surprised that the Arrandale HM55 CPUs don't support 1333MHz RAM. What about the upcoming dual core Sandy Bridge CPUs?

 

Yep they all can. Plus the i7 2720qm, 2820qm, 2920xm all support 1600MHZ RAM