Does the Clevo P377SM-A / Sager NP9377 actually support RAM @1866MHz?

As I continue my research towards which exact laptop I'm going to buy very soon, I noticed something.

Most resellers only have RAM @1600MHz when configuring the P377SM-A / Sager NP9377, but a few resellers also allow you the option to choose for RAM that goes up to 1866MHz.

According to the official specs from Clevo, this is not supported: 藍天Clevo

So how come some resellers allow you to build it like that anyway? Are they forcing a component that it's not really meant to be supported? What are the possible consequences of that?

 

short answer: yes

long answer: the maximum supported RAM speed depends on the integrated memory controller (IMC) of the CPU and the stability / overclockability of the ram sticks used. fastest available sticks at the moment are rated at 2133 mhz and have already been successfully oced to 2400 mhz as long as the CPU can take it, theres really no limit

so yeah, 1866 will run totally fine!

 

The odd chip can't manage it but if you get 1866mhz ram the reseller will obviously test it before sending to endure it's ok.

 

btw meaker, would using 1600+ mhz ram influence the overclocking ability of the cpu? if so id have to watch out not to start with 2133 mhz otherwise id lose some cpu max. clock

 

From Resellers you won't find it. You'll find it at builders though. Sager themselves stopped offering it a couple/few generations ago when it was causing a lot of bluescreens after the testing at their facility completed and in the customers hands. From a support standpoint was not worth offering higher speed RAM for marginal performance improvement in most applications going to 1866mhz and 2133mhz. Mostly just helps get higher benchmark scores.

 

Depends on your IMC, you will need to check with each chip.

 

We offer 1866MHz in several of our laptops, including the XMG P724 (P370SM-A). This is Hyper-X Impact and has been internally tested by us and validated - it will run at 1866MHz with the default BIOS.

Some other 1866MHs SODIMMs may not work out of the box so to speak. The official Intel spec is 1600MHz, which Clevo echos in their specification - but as other members have said that doesn't mean that the limit is 1600MHz, simply the Intel official supported spec!

We have customers whose workflow is improved by having the additional bandwidth, but for more generic usage the jump from 1600 to 1866 won't make a big difference. I can't comment on higher than 1866MHz as that's where our "official support" ends!

 

Higher speeds will often work but there are some chips that simply wont do it and in notebooks even with an unlocked bios you wont have IMC voltage control.

Often you can run 2133mhz kits at 1866mhz at nice latencies still at least.

 

As mentioned above, the integrated memory controller in just about all of the mobile i7 CPUs supports up to 1600 DDR3 RAM. We ran into problems pairing 2133 memory with the 4820k, which supports up to 1866, so I remain dubious about pairing 1866 memory with an IMC that supports up to 1600. 1866 will probably work, albeit at 1600 in accordance with the CPU.

 

Stock bios my np9377 with 4910mq ran my Corsair 2133 ram at auto 1866 CL11. With Prema bios I had to go into bios and set memory multiplier to 16x and get 2133 CL11 which was the rated speed for my ram. Quite satisfied since I'm running 32GB so all slots being used. I managed to overclock to 4G stable on all cores with no throttling on auto fans. Temps are all that prevent me from going higher.

 

As stated it depends on the IMC you got, my 4930k runs quad channel at 2133mhz CL10 so luck of the draw.

 

What timings are needed to oc memory to 2400? I never managed to boot when I mess with that in the bios.

 

The timings depend on the voltage options available, ram stick and IMC capability. Your IMC or ram may not be capable of that speed.

 

best to lower the timings all the was down and only then try and oc to the next higher frequency, then tighten the timings again until ure stable

 

Thanks guys for all of your replies.

I have to admit that I got a bit confused since some replies seemed to contradict each other.

Some of you said it will work right away, while some other talked about blue screens of death, or running into problems when pairing processors with RAM sticks with higher frequencies than the officially supported one.

I'm now looking into getting a Clevo P770ZM (not a P377SM anymore), and I'm thinking maybe I should stick with the officially supported 1600MHz. Not only the Clevo page endorses the 1600 limit, but also the processors and the motherboard chipsets all have 1600 as the limit...

 

as with overclocking any component, it always varies with each chip / ndram / PCB, etc. some can take more than others! so i guess those contradicting comments are all true, just based on different "luck of draw"

you can always downclock higher-rater ram stick to lower frequencies, so might as well go all out with 2133 sticks and then see what u can get out of your system especially when ure going for the ZM series, the desktop cpu models would have a way more solid and stable integrated memory controller (IMC) than their mobile pendants, so 1866 should AT LEAST be possible if you ask me

 

This is your "safest" route. 1600 is fast enough for most users anyway.

 

blasphemy! its never "fast enough"!!!

 

I'dlove to step up to 2400mhz lol but the multipliers stop at 2133mhz

 

they do? oh noooooz....prema! unlock that option in bios right away, we need moar powah!

 

Only on P570WMx, all other systems since two years allow up to 2667Mhz (with Prema Mod).

 

ha, sucks to be you meaker! you and ur low-performance system

 

I get quad channel so you would need 4.27ghz ram to match my bandwidth still so I will live