Precision 7530 & Precision 7730 owner's thread

Ah, ok good to know. For that reason, I should have maybe hung on to the HyperX, but this RAM is running fine for me.

Based on the link @yrekabakery provided, CAS Latency 18 is .25 nanoseconds faster than CAS Latency 20. Hardly noticeable while introducing possible instability through XMP overclocking.

 

1.25ns faster actually.

 

Oops, was looking at it on mobile and the table didn't align properly.

 

Honestly I am not familiar with XMP things. But to be straight forward, frankly, I suggest to use only the factory default or just 'normal' or 'ordinary' RAMs. Because they are always the most stable ones in fact.
Forget about Vengeance, Hyper X or Ripjaws, no matter how fancy they claim themselves to be.

I mean, based on my personal experience, I really do not suggest to use those 'high end' Vengeance, Hyper X or Ripjaws. I was once a big fan of those so called high end fancy fast MHz and low latency RAMs, but, after using those RAMs for a long time and compare them with just those 'normal' or factory default RAMs, I found that actually 'normal' or factory default RAMs are simply just really the most stable ones, and I never met any issue with them.
On the contrary, those 'high end' ones can cause some compatibility or stability issue(unexpected blue screen, freeze, or simply laptop cannot recognize them and cannot boot). Especially for new systems like 7730/7530, Vengeance, Hyper X or Ripjaws are NOT the best choice (they usually require slightly higher current, and the timing are not the standard). And, you need to wait a long time for new versions of Dell's BIOS to support them. And even if in the future new DELL BIOS support them, there is no guarantee that those chips will work as stable as those factory default or just ordinary ones.

So, if you don't care about stability, sure, you can go with Vengeance, Hyper X or Ripjaws.
Otherwise, to make life easier, I simply suggest that you just use factory default ones or ordinary ones, which are usually micron, Hynix or Samsung. They are simply the best and no compatibility or stability issues. The reason is very simple. Micron, Hynix or Samsung's biggest clients are always Dell, HP, Lenovo, Of course they will provide them with the best quality rams with best price. Trust me, believe it or not, Vengeance, Hyper X or Ripjaws simply cannot get the best quality rams (especially so-dimm chips), because their market is way too small compared with Dell, HP, Lenovo.

In short, no matter what no matter how, I want to say, just use ordinary ecc ram for our precision laptops.
I would suggest, for example, for 16G ECC DDR4 sodimm, you can search google or ebay for micron's MTA18ASF2G72HZ or crucial's CT16G4TFD824A.

 

@CR3, I am actually looking at 2666 MHz 16 GB ECC SODIMMs: either the Kingston KSM26SED8/16ME (which uses Micron E-die) or the Samsung M474A4G43MB1-CTD (which uses Samsung B-die, famous for overclocking at running stably at 3200 MHz at CL14 with Ryzen CPUs).

Ideally I'd like to buy the latter one, but I absolutely cannot find it properly on sale anywhere. Those places that have it listed, don't appear to have it in stock. @CR3, I believe (hopefully I'm not mistaken) you are based in either the PRC or HK? Have you got a source for memory vendors, that can help?

As for overclocking, I would like to try it, if possible. If not, I'd like the fastest non-OC memory possible.

 

Check this my man, MTA18ASF2G72HZ on ebay, they seem to have the 2666 version which is MTA18ASF2G72HZ-2G6. But I am not sure if the photo is the actual ram or not. Perhaps you can ask the seller.

https://www.ebay.com/itm/Micron-MTA18ASF2G72HZ-2G6E1-16GB-DDR4-2666-ECC-SODIMM/362292997017?epid=10017990826&hash=item545a586b99:g:TBEAAOSw0DJaz8ip&_sacat=0&_nkw=MTA18ASF2G72HZ&_from=R40&rt=nc&_trksid=m570.l1313

another amazon link,

https://www.amazon.com/Supermicro-C...qid=1532228158&sr=1-1&keywords=MTA18ASF2G72HZ


specs of MTA18ASF2G72HZ series is here,

https://www.micron.com/resource-details/260fb0f0-9d33-463c-898f-797980f87c8f


2G6 is 2666
2G3 is 2400
2G9 is 2933
3G2 is 3200


I have 64G 2400 (MTA18ASF2G72HZ-2G3) in my 7730 and they works fine.
2666 I am not sure, but it will definitely be great if they work!

 

Forgive me for asking, but what is the benefit of the Kingston RAM you highlight over Kingston's HyperX HX426S15IB2K2/32 Impact 32 GB (2 x 16 GB) 2666 MHz DDR4 CL15 SODIMM RAM?

 

The RAM I've chosen is ECC, or error-correcting code RAM.

If you look at the green ECC SODIMM, it actually has nine RAM dies per side, compared to eight dies per side on your HyperX SODIMM.

So, there is actually 18 GB of actual RAM on each 16 GB ECC DIMM. That extra 2 GB is for data parity checking—essential for workstations working with critical medical, physics, turbulence, CFD, CAD simulations and large dataset manipulation, and servers which have to store lots of data, and serve them up without any changes that can corrupt data, like random bit flips which can occur from radioactive elements in the RAM's surroundings, cosmic rays from space, or from the RAM itself.

Of course, your RAM is faster because it is CL15 rather than CL19, but then again, most ECC RAM is slower than 'consumer grade' HyperX or G.Skill or Corsair Vengeance RAM.

 

Thank you for you informative reply, Ionising_Radiation. Very interesting, and I have learned something new today.

 

Hi, I’m currently looking for a replacement for my Thinkpad T440p and it looks like the Precision 7530 might win out over the Thinkpad P52. With the new hexacore CPUs and other significant advances over my T440p, the timing feels right.

The machine should be fast and last me for four years. So I’m weighing my options between the i9 version, which will supposedly be available with the 3200 Mhz RAM at the end of August, and the Xeon 2186M with ECC RAM.

I am not sure how much value to put on the ECC RAM and how much faster the non-ECC RAM is.
At the moment Dell only offer the 2400 Mhz ECC RAM, but 2666 Mhz ECC RAM should work, right? I haven’t seen any faster ECC RAM, so I assume that at the end of August, the non-ECC version may have a performance advantage.

I don’t work with any CAD or finance software that strictly needs ECC. But I do run a couple of VMs and a local web server all day, so I figure ECC might have some stability benefits?

Basically, I’m wondering whether to go with the Xeon 2186M and 2666 Mhz ECC RAM now or go with the i9 and possibly 3200 Mhz RAM in two months.
What do you think about that choice?