Question Best memory option

[Ronburgundycx]

I currently have a MSI Z790 Edge mobo with 2x16gb Kingston Fury 5600mhz RAM sticks. What is the best RAM (fastest) I can add to this setup while still using the current Fury sticks?

specs below-
4x DDR5, Maximum Memory Capacity 192GB
Memory Support 7200+(OC)/ 7000(OC)/ 6800(OC)/ 6600(OC)/ 6400(OC)/ 6200(OC)/ 6000(OC)/ 5800(OC)/ 5600(JEDEC)/ 5400(JEDEC)/ 5200(JEDEC)/ 5000(JEDEC)/ 4800(JEDEC) MHz
Max. overclocking frequency:
• 1DPC 1R Max speed up to 7200+ MHz
• 1DPC 2R Max speed up to 6600+ MHz
• 2DPC 1R Max speed up to 6400+ MHz
• 2DPC 2R Max speed up to 5600+ MHz

Supports Intel® XMP3.0 OC
Supports Dual-Controller Dual-Channel mode
Supports non-ECC, un-buffered memory

 

[turtletarget111]

I would strongly advise you do not mix different sticks of memory. If you bought sticks of memory that ran at a faster speed or lower latency, mixing them with your current sticks would provide no performance gain. The faster sticks would simply run at the same speed your current modules are operating. You can either buy another set of the sticks you already own for increased memory capacity, or buy a new set of sticks entirely and discard the Kingstons. If you are looking to upgrade your memory for increased performance in things like gaming, faster memory will add a minscule amount of performance. It would be better to spend that money on a faster video card or replace a hard drive with a SSD. If you still want to replace the sticks with faster ones, I would go with the G.Skill Trident Z5 kit. It runs at a blistering 7200 CL34 to keep your CPU fed.

 

[Misgar]

What apps are you running that would benefit from 64GB instead of your current 32GB?

The "best" RAM setup is the one that runs without crashing, even under the most arduous conditions. If your apps hang or the computer crashes when you push the RAM too hard, that's hardly the best setting.

If I'm reading your specs correctly and you end up with 2DPC 2R (2 DIMMs per channel, dual rank) in a 4 DIMM configuration, you'll be limited to XMP speeds up to 5600MT/s.

If all 4 DIMMs are single rank, you might achieve 6400MT/s.

If you stick with a 2 DIMM configuration, you might achieve 6600 (dual rank) or 7200MT/s (single rank) if you're lucky.

Mixing "indentical" pairs of DIMMs from the same manufacturer can cause problems. The chips won't be from the same bin. Mixing odd pairs from different manufacturers may cause even bigger problems, with odd SPD values.

The best option is to ditch the 2 x 16GB and fit 2 x 32GB. That way you double your memory and get to keep the fastest speeds (which might not be necessary).

I'm running 2 x 32GB DDR4-4800 on a 7950X and it's 100% stable during 36-hour video rendering sessions with both the CPU and GPU pushed hard all the time. The last thing I need is a crash 30 hours into a rendering session and having to start all over again.