4 x 32GB DDR4 4000Mhz Options

Kryt3n · 23 Oct 2020 at 13:12

I am putting together a Ryzen 9 5950x build based on a Gigabyte AMD Ryzen X570 AORUS XTREME which will be used for work during the day and gaming at night. I need 128GB ram as will be running some network lab software which is very memory hungry. I hear that the sweet spot for memory on the Ryzen 9 59xx will be 4000 Mhz. However im struggling to find any in 32GB sticks and the one I can find is £1200! for 128GB. I know the Ryzen 9 59xx is not released yet but will I really see that much difference in speed if I just go with 3600 Mhz? I can get VENGEANCE RGB PRO 128GB (4X32GB) DDR4 PC4-29200C18 3600MHZ QUAD CHANNEL KIT on overclockers for £530 which is a huge cost saving. Again with CAS 18-22-22-42 Timings is this a big issue? My gpu will be a Asus 3090 Strix OC (on order) if that helps, so I don't want to compromise to much on speed.

Thanks

mickyflinn · 23 Oct 2020 at 13:39

You may be able to overclock the 3600mhz to near 4000mhz but I doubt there wont be much performance difference between the two.

Does the software you use benefit from 4000mhz ram?

alec · 23 Oct 2020 at 13:59

At that capacity and speed you take any timings you can get. There is a reason 4x32gb kits mostly top out at 3600 and high timings. Going beyond is difficult.
Best chance with a native 4000 kit like F4-4000C18Q-128GVK

Kryt3n · 23 Oct 2020 at 14:14

Thanks for the info guys, the software im using will not really benefit wether I use 3600 or 4000Mhz my thought process was more not to compromise on the gaming performance of the machine given the gpu and cpu. I take your point regarding the capacity and speed there is very little choice and less so availability of 4x32gb 4000Mhz. Looks like G.Skill Ripjaws V DDR4-4000MHz CL18-22-22-42 1.40V can be had for the same price as the Vengeance Pro 128GB 3600Mhz with the same timings.

mickyflinn · 23 Oct 2020 at 14:19

Kryt3n said:
Thanks for the info guys, the software im using will not really benefit wether I use 3600 or 4000Mhz my thought process was more not to compromise on the gaming performance of the machine given the gpu and cpu. I take your point regarding the capacity and speed there is very little choice and less so availability of 4x32gb 4000Mhz. Looks like G.Skill Ripjaws V DDR4-4000MHz CL18-22-22-42 1.40V can be had for the same price as the Vengeance Pro 128GB 3600Mhz with the same timings.

Don't forget theeses are overclocked values , zen 3 is only rated at 3200mhz so may not reach 4000mhz on your system.

Kryt3n · 23 Oct 2020 at 14:27

Ah yes I read that now. So If I was to go with 4000Mhz in the hope that I can overclock to that, would it normally have a number of XMP profiles so as to run at 3200 or 3600 if thats all I can achieve? Looking at memory it was not obvious to me if lover XMP profiles are supported under the native speed. Cheers!

Kryt3n · 23 Oct 2020 at 14:53

Doing a bit more research and understanding the above a bit more I see that 4000 Mhz would be its max rated speed out of the box in terms of XMP profiles, so would assume would support other lower profiles

smogsy · 25 Oct 2020 at 06:54

Lately at 4K for example RDR2 uses 8GB video Memory & on fresh build of W10 playing RDR2 with Brave = 10 tabs im seeing 13GB-14GB ram Used, (now windows caches more as im on 32GB)

Joxeon · 25 Oct 2020 at 09:43

Kryt3n said:
I am putting together a Ryzen 9 5950x build based on a Gigabyte AMD Ryzen X570 AORUS XTREME which will be used for work during the day and gaming at night. I need 128GB ram as will be running some network lab software which is very memory hungry. I hear that the sweet spot for memory on the Ryzen 9 59xx will be 4000 Mhz. However im struggling to find any in 32GB sticks and the one I can find is £1200! for 128GB. I know the Ryzen 9 59xx is not released yet but will I really see that much difference in speed if I just go with 3600 Mhz? I can get VENGEANCE RGB PRO 128GB (4X32GB) DDR4 PC4-29200C18 3600MHZ QUAD CHANNEL KIT on overclockers for £530 which is a huge cost saving. Again with CAS 18-22-22-42 Timings is this a big issue? My gpu will be a Asus 3090 Strix OC (on order) if that helps, so I don't want to compromise to much on speed.

Thanks

Unless your CPU bound so IE 1080P gaming then fast ram say going from 3200mhz to 4000mhz won't make much difference and likely no difference at all at 4K.

Not sure how faster ram will effect your lab work but it's maybe worth looking into.

pc-guy · 25 Oct 2020 at 13:29

You should always try to look to achieve balance between latency and throughput on ram.

If your lab work needs that much memory both of those factors will come to play. However with those loose timing at 4000MHz you will see some performance loss. So it maybe better to run 4000Mhz ram at 3600Mhz and tighter timing.

for 128GB of ram that’s quite high speeds. It would be interesting to know if the ram runs without a fault. Motherboards are obviously advertised for these speeds (but how many people max out the dim slots). People at times will have issues running 8GB in 4 slots let alone 32GB...

Please do keep us posted.

Cenuij · 2 Nov 2020 at 13:59

I also looked at the F4-4000C18Q-128GVK kit, but I couldn't really find it anywhere outside of import from US, I wouldn't mind that so much with a different product but 128G in four slots makes me nervous so a UK retailer is better. So I've gone with the vengeance pro kit @3600 - this is going into an Aorus Master and I'll be picking up a 5950x as well.

I'm honestly expecting a bit of a fight to clock it all the way to 4000 but who knows... My work needs are not really latency sensitive (VM's, lab kubernetes, that sort of thing) so anything over stock binned ratings will be a nice wee bonus.

Cenuij · 3 Nov 2020 at 12:43

This CMW128GX4M4D3600C18 128G kit is likely to be hynix yeah? I suppose then it *might* go higher if it's C{M|J}?R, and looser timings on 4x dual rank won't matter much - MFR unlikely to clock very high though

Edit: CMR? CJR?