Book 4 1335U RAM performance

[Obtendo]

Performance is below expected which seems to be due to RAM. CPU, GPU and disk all perform as expected.

Model: NP750XGJ-KS2SE

Specification and RAM naming list 4266MT/s while RAM seem to be running at 2666MT/s? Gear 4 cause UCLK to run at 333MHz which is far from ideal. I might misunderstand something here...?

Screenshot has RAM performance compared to similar 1335U laptops from Dell, HP, Lenovo and Fujitsu.

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At the top of your hwinfo64 screen shouldn't this show 8GB and not [1GB].

What is the motherboard and did you check these specs. Obviously you can put superfast RAM in many PCs, but if the motherboard doesnt support the speed it will just run at the bus speed of the board.

I would double check these specs. How long have you had it by the way ? Obviously the book 4 is not a new model. Has it ever worked correctly ?

[Obtendo]

Hello. It's listed in HWinfo as 1GB modules x 8:

It was purchased late November. Replacing or adding RAM isn't an option as it's soldered. Besides, the main issue in relation to performance seems to be UCLK, not MCLK even though it's running below spec at max 2666MT/s.

A bit confused regarding what specs specifically you want me to have a look at..? RAM info for this model from Samsung: 8GB 4266MHz LPDDR4x (soldered).

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Note: I am not an employee and if you want full customer service interaction then you will need to contact their phone line or chat service.

I was surprised to see that only 1GB was listed... but you have explained this.

I would say 8GB is quite a low spec these days... but should at least run ok. My point about specs is that the RAM speed of what a device is capable, can sometimes get throttled back by the specs of the rest of the system.

I assume you have the I5 processor version and 8GB version. I am not familiar with gear 4, but if it needs any kind of high resource then it may be the laptop is somewhat of a bottleneck.

If it is only a few months old since November I would contact service and have a warranty repair if you believe there is a fault.

[Obtendo]

For Intel gear mode define the relation between the MCLK (half of MT/s for DDR, 1330MHz in pictures with RAM at 2666MT/s) and UCLK which is the memory controller. Gear 4 has the effect that the memory controller is running at 1/4 of the frequency of MCLK. Gear 2 would be half the speed. For Intel 12/13/14 the best performance if access to tuning parameters is usually achieved at the highest stable MCLK at gear 1. UCLK of 333 is severely limiting memory performance, but it's not something I expect defined as en error or being understood by service if sending in laptop. Hence asking here in case anyone has insight. Perhaps downgrading to an older BIOS or similar.

It's not my main computer and 8GB is sufficient for what it's intended for which is mainly streaming/light use during travel. 3GB used at idle, plenty free.

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It seems you have got a good concept of what the expectations are, and have done your research.

I dabble with PCs... builds... laptops... but I haven't owned a samsung book.

There may be other responses here... but perhaps not really any high technical PC experts in the group that I am aware... someone may respond if they have any comments.

Sorry I cant be more help

[Obtendo]

Appreciate the effort! 🙂

I'm just a weirdo who noticed less performance than expected as I'm used to spending way too much tuning main rigs for optimal performance. This laptop feels more "sluggish" for multiple workloads than what I would expect due to the memory configuration. UCLK at 333MHz which for a desktop would be 1800MHz+. Don't expect desktop performance, but did expect MCLK  of 2133MHz (correct based on advertised RAM 4266MT/s), gear 2 and UCLK at 1066MHz. Would perform way way better. No idea if it's just mine due to some setting somewhere or expected and identical for all similar Book 4 models.