1333mhz vs 1600mhz

I'm planning on getting a p150hm with specs:

• i7-2720qm
• GTX485m
• 500GB Hybrid drive
• 8GB memory

Now I don't know too much about overclocking CPU or RAM, but from what I've read people usually buy 1600mhz memory to clock their CPU higher or something, but as far as I know you can't OC the 2720qm. (Or am I extremely wrong?)

So here's what I'm asking:

Why would someone buy 1600mhz memory?
What kind of performance would 1600mhz memory give over 1333mhz memory?
Where would it be noticable?
Would it be worth the $99 upgrade?

Above everyday activities I'll be using it mostly for "hardcore" games (eg. Battlefield 3), adobe applications (AE, PS, etc), music production (FL Studio).

Sorry if this has already been asked.

 

Well you can see the laptop below in my signature which is 8gb 1600mhz. Faster is always better even if its unnoticeable. Apparently if you want 1.6ghz ram, you only can have that in two ram slots (p150hm has four slots, all can support 1333mhz but only two can support 1600mhz) so if you want to upgrade to more ram in the future, the 1600mhz in two slots will automatically unclocked to 1333mhz if i'm not mistaken while other two slots you add in the future for more ram will be maxed at 1333mhz.

Overclocking the 2720QM is quite tough, while it will "overclock" itself to 3.3ghz under the load. So no point to overclock because 2720QM is an extremely fast processor.

 

It's impossible to overclock the 2720qm in the same way as the previous i7 series, the only i2xxx mobile processor which allows overclocking is the 2920XM, however not all Clevo models will support the processor overclocking at the BIOS level.

If the OP is referring to TurboBoost as the overclock, then yes the 2720 will have the feature.

 

Yea,

We know that there is a little speedup for 1600mhz memory. So thats why we put 1600mhz memory standard in all of our machines. Truth be told its actually the same price to us as our previous memory we were using (Corsair 1333mhz) as it is for our Patriot 1600mhz. Its nice fast memory =)

 

Hey Myth,

I've noticed that you guys offer up 16GB (4GB x 4) of 1600mhz on the Pollux 1611 Chassis (Clevo P150HM). I was under the impression that the P150HM only allowed the use of 1600mhz in two slots max; capping at 8GBs. I didn't even know you could exceed 16GBs of RAM in this model, is that correct per your site? Not like I'm interested in dropping $2,000 in RAM alone, just curious though.

 

I would like to confirm the info said by a sager rep on this video that the P15x models support overclocking (I don't think he meant the turboboost). Anyone could confirm that? Which cpu (any or just the 2920xm), which P15x model exactly, and through bios or software (like throttlestop)? Thanks

 

^^He's referring to the next refresh of these models, which is going to come next year after Ivy Bridge is released. The reason that he mentions it is because it's a feature that wasn't formerly available.

 

Maximum PC | Experiments in RAM: Memory Myths Put to the Test

that article is over 2 years old, and for desktops and different cpus, but they test 1066 vs 1600 on page 2. it still might answer some of your questions though.

 

Yeah it makes sense. Thanks for the opinion. Well I guess I will wait then, there are many changes (backlit KB, IvyBridge, overclock ability, new gpus, and who knows what else) to come next year and my notebook is still handling the games with little to no sacrifices. Any Sager rep or reseller could say something about overclocking cpus in current systems?

 

Hey,

You can only overclock the CPU on the HM67 chipset (The P170hm), and then only on the 2920xm.

Memory speed changes are allowed on HM65 / 67 BUT there is no interface to it right now on the HM65. (And you can't overclock the memory per-se on the HM65 you can only select a speed that already is supported by the sodimm)

 

hello do you know if clevo p170hm can work properly with 1866 so dimm ram?

thanks

 

It will probably work but not at 1866, probably just at 1333 as the 1866 is a XMP profile not a JDEC standard.

 

Hate to have two posts next to eachother.. But

1) Yea it supports 16GB @ 1600mhz.. I looked at a laptop yesterday in that exact configuration and according to all my system tools it said DDR3 @ 800MHz (or 1600Mhz effective) so I would say yea it works =)

2) Yup they support 32GB of memory (4x8GB), but your going to pay for it... But cheaper 8GB SODIMMS are coming soon probably Q3-Q4

 

thanks for your answer, so it's useless to buy 1866 ram , i'm going to buy kingston 1600 ram.

 

The Kingston Hyper X 1866Mhz is actually Plug N Play JDEC and not via XMP profile...

 

so does clevo p170 support them at 1866 ?

 

We'll let you know, we will be getting our qualifying sample either saturday or monday.

If they work we will offer them in our laptops.

 

OriginPc is just building my P170 with the 1866 RAM, so I guess it works...

 

1866 Memory works in the follow models:

P150HM
P151HM
P170HM
P170HM3

We will be testing the W series models next probably later this weekend.

The hyperX memory has been put up on our website as an option on those models for people who wish to purchase a laptop with the 1866 memory

thanks!

 

So the P150HM with 1866 operates at 1866?

Also you stated that you can run 4 slots of 1600? This goes against all we've seen about the P150HM, I've always read there was a 2 slot restriction when trying to run at 1600, otherwise it was said to downclock to 1333.

Also does this mean that 1866 works with 4 slots as well? That is pretty crazy if true.

Thank you!

 

would u notice a difference in performance between 1600 and 1866?

 

hello thanks for the review

 

We will be doing a comparison bench between 1333 vs 1600 vs 1866 tomorrow that we'll post up on this thread

 

Hey,

Just as an update, the 1866 memory is supported on all W series models also. Benchmarks will be up shortly.

 

Hey Guys,

Ok so we took one of our Pollux 1455 machines, which is a W150HRM based optimus machine and we put 8 GB of DDR3-1333, DDR3-1600 and DDR3-1866 in it. Then we ran some benchmarks so you could see the differences between them.


The first image is the combined cache and memory bandwidth of each memory type, and it does go in order, so the slowest is the 1333, and the fastest is the 1866 with the 1600 in the middle.

Spoiler

Next is the raw memory bandwidth, and it too goes in order.

Spoiler

Finally I don't have any fancy graphs for the real world tests but I can give you percentages.

PCMark7: 4% Increase from 1333->1600, 3% Increase from 1600->1866
7-Zip: 0% Increase over 1333 (CPU Bound)
L4D2: 5% Increase from 1333->1600, 4% Increase from 1600->1866
BF: BC2: 2% Increase from 1333->1600, 3% Increase from 1600->1866

Note for the games, thats in FPS increase.

So overall, not earth shattering, but a little bit of a boost. Hence why we offer it for free with every system (1600) =)

thanks!

 

That's more of a benefit than I would have expected.
It's very interesting that you get any benefit at all from 1866 over 1600.

So you didn't have to modify any bios settings to get the RAM recognized and running at 1866? Just stick it in and it's good?

 

Yup stick it in and its good.

 

It's nice that it is included as a default as the performance benefit for upgrades are not worth the cost for upgrading yourself and in general for those companies that default with 1333MHz.

 

What about 1333 to 1866? 5% more FPS?

 

if you take his LFD2 #'s, it'd be 1.05 x 1.04 = 1.092 or a 9% bump.

I wonder what it'd be with a faster GPU