Which would you choose?

no_1_dave

no_1_dave

no_1_dave

Soldato
Joined
7 Jul 2004
Posts
7,861
Location
Gloucester
All 3 are 64GB DDR5 Corsair Vengeance...

6000Mhz CL30 1.4v
6600Mhz CL32 1.4v
6800Mhz CL32 1.45v

Running on a Gigabyte Z790 board.

Upgrading from 32GB to 64GB but can't decide which to get. None are specifically mentioned on the list of compatible memory for my motherboard, but then my current memory isn't either. I figure Corsair Vengeance tends to be supported more than others though.
 
There’s no way you’re running 64gigs at 6800 MT/s or 6600 on Intel, even Z790 with a 13th gen CPU.

Even 6000 CL30 is kinda pushing it because of the increased memory banks.

Intels memory controller is, on average, poor.

Go look at your motherboards QVL list, what speeds does it support at 64gig capacity?

Why do you need 64gigs?

Also, Corsair isnt per se supported more at those capacities but is often included on memory QVL lists because of how popular it is in general.

It has more to do with the onboard memory chips than the brand of memory.

Samsung B Die chips can’t overclock but can do 6000 with very tight latency settings so one of those kits that you mentioned might be Hynix A die or M die and the other might be Samsung B die, all performing very differently.
 
JollyJamma said:
There’s no way you’re running 64gigs at 6800 MT/s or 6600 on Intel, even Z790 with a 13th gen CPU.

Even 6000 CL30 is kinda pushing it because of the increased memory banks.

Intels memory controller is, on average, poor.

Go look at your motherboards QVL list, what speeds does it support at 64gig capacity?

Why do you need 64gigs?

Also, Corsair isnt per se supported more at those capacities but is often included on memory QVL lists because of how popular it is in general.

It has more to do with the onboard memory chips than the brand of memory.

Samsung B Die chips can’t overclock but can do 6000 with very tight latency settings so one of those kits that you mentioned might be Hynix A die or M die and the other might be Samsung B die, all performing very differently.
Click to expand...

There are no 64GB kits listed on the compatibility list for my motherboard.

I have the Gigabyte Z790m Aorus Elite
www.gigabyte.com

Z790M AORUS ELITE (rev. 1.0) Key Features | Motherboard - GIGABYTE Global

Lasting Quality from GIGABYTE.GIGABYTE Ultra Durable™ motherboards bring together a unique blend of features and technologies that offer users the absolute ...
www.gigabyte.com www.gigabyte.com

I keep maxing out 32GB ram when encoding multiple videos at the same time and 64GB is now more reasonably priced then it used to be

So you're saying the 6000Mhz CL30 is likely the best option?
From what I've read about DDR5, lowering the latency gives more of a boost to performance than a slightly higher clock speed which is why I was considering the 6000 CL30 in the first place
 
Last edited:
So you're saying the 6000Mhz CL30 is likely the best option?


No. I’m not.

There are no 64gig kits on your motherboards QVL list so I’m making no recommendations whatsoever and would advise you to test a kit out before you make the purchase.

Low latency RAM is tough to run in higher capacities so I’m not recommending any kits.

Read the QVL guide carefully, there are 64gig kits that were tested, the QVL list is just horribly written and is confusing.
 
Last edited:
So Gigabyte are ducks.

They advertise "up to 192gigs of RAM" and then don't do QVL for RAM kits higher than 48gigs.
Ok so you need to get specific RAM kits that have been on the QVL list and have been tested with 4 modules (the layout is a bit weird is all).

e.g. the RAM kit Fury Beast KF560C40BWAK4-64 has been tested and is 64gigs.
 
Last edited:
no_1_dave said:
Yes, but CL40 vs CL30 :mad:
I might just test one of the Corsair kits and see how it goes.

Cheers for your input... Even though I am not strictly taking your advice I still value it and will keep it in mind
Click to expand...
6000 CL 30 is very expensive and very unlikely to work with your motherboard and it would probably be negligible in performance difference.

You'd see more difference with more cores in a CPU or a better GPU.

YOu can try get 64gigs of 6000 CL30 but I'd put money on it not working.
 
JollyJamma said:
6000 CL 30 is very expensive and very unlikely to work with your motherboard and it would probably be negligible in performance difference.

You'd see more difference with more cores in a CPU or a better GPU.

YOu can try get 64gigs of 6000 CL30 but I'd put money on it not working.
Click to expand...

Hmm, like you say, reading various reviews (shop reviews by customers) people seem to struggle with 6000+ and CL30
People do seem to be having success with 6000 CL32, but any faster than 6000 people are saying they're needing to reduce down to 6000 to stop memtest errors and BSOD.

After deciphering the compatibility list there does seem to be some 64GB Kingston Fury kits which are 6000 CL32
KF560C32RSAK2-64 and KF560C32RSK2-64

Then there are others at CL36 and then up to CL40. The CL32 kits do tend to be £50+ more expensive than the CL40 kits... I'm starting to look more favorably at your suggestion and stick to 6000 CL40 saving myself some money and knowing I have a more stable system. Encoding video takes ages, I set it before going to bed and it can take 10+ hours sometimes so won't be done until I get home from work. Having my PC crash half way through is pretty annoying (it's happened a few times for various reasons). I just have that niggle that I'm leaving gaming performance on the table using CL40 instead of something closer to 30 :confused:
 
I just have that niggle that I'm leaving gaming performance on the table using CL40 instead of something closer to 30
Click to expand...

Right but do you want stability or faster gaming??

It won’t be faster by much either since Intel prefers faster speeds over lower latency.

Up to you, I’ve given more than my 2c so I’m out
 
I choose the option not on your list :) , 6400MHz CL32 (CMH64GX5M2B6400C32) and it's running perfectly fine on a MSI MPG Z790I Edge with a 13700K.

Edit - Well this is embarrassing, it seems I didn't remember correctly the type of RAM I bought months ago, which is ironic considering it's memory related.

I checked it and it appears I got 6600MHz CL32 after all.

embed
 
Last edited:
Mysterae_ said:
What did you decide to go with OP?
Click to expand...

I went with 64GB G Skill Ripjaws S5 6000MHz CL30

I found that this ram plus the 6400Mhz CL32 kit was on my motherboard's QVL. I chose this one over the 6400Mhz because I could find the white version in stock. The 6400Mhz CL32 was only available in black everywhere I checked, which wasn't many places as for some reason G Skill appears to mainly be available in the states and not stocked so much over here compared to Corsair
 
That'll be some nice RAM for sure.

I get what you say about the availability of RAM from different memory manufacturers in the UK, even OCUKs selection is poor if you want something other than Corsair.
 
Ch3m1c4L said:
@no_1_dave
May I ask why you are encoding multiple videos simultaneously? Surely it'll be much faster if you simply queue/batch encode them?
Click to expand...

ffmpeg is not very good at using all threads on high thread count CPUs
Encoding 2 simultaneously pegs the CPU to 100% and encodes them overall about 60% faster than doing one at a time in a queue
 
Last edited:
no_1_dave said:
ffmpeg is not very good at using all threads on high thread count CPUs
Encoding 2 simultaneously pegs the CPU to 100% and encodes them overall about 60% faster than doing one at a time in a queue
Click to expand...
Can you set certain cores to process certain encoding tasks at all?

If you can manually set certain cores to process encoding task one and another set to process encoding task 2, you might see a further improvement as then the system has less CPU overhead trying to figure out which cores to assign to which task.
 
JollyJamma said:
Can you set certain cores to process certain encoding tasks at all?

If you can manually set certain cores to process encoding task one and another set to process encoding task 2, you might see a further improvement as then the system has less CPU overhead trying to figure out which cores to assign to which task.
Click to expand...

I've not tried allocating cores to each encode when running two. It's possible because doing 2 at the same time means running 2 instances of ffmpeg so it wouldn't be too difficult to just assign half the cores to one instance and half to the other.

I did test doing just 1 encode and only allocating the e-cores. It kept my PC cool & quiet and still completed the encode faster than my old 9900K lol :D
 
Last edited:
Sooo, the 64GB G.Skill 6000 CL30 Ripjaws kit is in and working nicely.
Set the XMP profile and stuck it on a USB bootable memtest for 4 hours and all is nice & peachy. No errors :)

I do notice 6000 CL30 does make a slight high pitch tone though, a bit like coil whine but not as prominent. Not sure if it's coming from the ram or if using faster ram is causing it to come from somewhere else but it definitely wasn't there with my old kit. Not sure if it'll bother me or not yet, time will tell I guess :confused:
 
You must log in or register to reply here.
Back
Top Bottom