Ryzen 7600 ram 64gb vs 2 /4 channel,vs higher speed

[gasolin]

Asrock B650 pg lightning

Downgraded to a 7600, memory is 32 gb 6000mhz cl 30 flare x5 F5-6000J3038F16GX2-FX5

F5-6000J3038F16GX2-FX5 - Overview - G.SKILL International Enterprise Co., Ltd.

Designed for DDR5-enabled AMD AM5 platforms, Flare X5 series DDR5 memory is built for high performance in a low-profile design. Featuring AMD EXPO overclocking profiles for easy memory overclocking, users can easily enable overclocked performance by simply enabling EXPO in the BIOS on compatible...

www.gskill.com

Im interested in different memory, according to the QVL list for ryzen 7000 there is alot of 6400-7200mhz ram i can use

Internet say it's harder with 4 ram sticks but some tests say sometimes 32gb is faster, sometimes it's 64gb, the same with 2 and 4 ram sticks and the same can also be the case with 32gb 6000mhz cl 30 and 6400mhz cl 32

Forget that i like many people don't need 64 gb since im only interested in getting just a little more out of my system without having to oc above rated speed (reliable,heat)

64gb 2 or 4 ram stick (no less than 6000mhz cl 30 or 6400mhz cl 32 and so on)

32gb 6400 or 6800mhz cl 32 or mabye 34 if it's 6800mhz or faster (32gb to keep price down) vs 4 x 16 gb F5-6000J3038F16GX2-FX5 one pair for 120 euros (total 4 ram sticks)

32gb 6000mhz cl 28 is to expensive (around 200 euros, cheaper to buy 6400mhz cl 30 memory)

 

[Princess Garnet]

1. If you don't need more capacity, then adding more is going to be of no little to benefit.

2. More DIMMs is harder to run. That's basically a universal truth. Whether it matters or not, however, comes down to "is it preventing me from hitting my desired frequency". If it's not preventing you from reaching that point, then the "harder to run" point is moot. If it does prevent you from reaching that point, then you're giving up performance.

On DDR5, at least on AM5, four DIMMs will often prevent you from reaching 6,000 MHz+. You're likely looking at 4,800 MHz, 5,200 MHz, or 5,600 MHz with four DDR5 DIMMs on AM5, but it depends on motherboard, BIOS, the RAM, whether the RAM is single rank or dual rank, and so on. 6,000 MHz frequency you want to run at for those CPUs because that's a more or less guarantee of what the IMC/Infinity Fabric will reach on almost all CPUs. Some will do a bit higher but 6,400 MHz is often a gamble with silicon lottery.

So unless you need a capacity that can't be reached in two DIMMs, you should ideally opt for two DIMMs over four DIMMs. You can currently get up to 96 GB with two DIMMs. 128 GB+ is the point you need four. Once 64 GB consumer DIMMs that aren't low frequency release, that will move up.

3. The AM5 platform is not quad channel. Using four DIMMs will still be dual channel; you'll just have two DIMMs per channel instead of one. This can sometimes marginally help performance, usually if you're using single rank DIMMs because dual rank DIMMs see diminished benefit, and on AM5, you will likely not run four dual rank DIMMs without needing to lower the frequency anyway, which will hurt more than you gain from this.

If you already have 6,000 MHz CL30, I don't see the point in changing it unless you need more capacity.

 

[Bill_Bright]

2. More DIMMs is harder to run. That's basically a universal truth.

While perhaps true, that is misleading. Harder does not mean impossible nor does it suggest it is not worth considering. If my motherboard supported 4 sticks and I wanted to increase my RAM, I sure would NOT hesitate to simply add two more sticks of compatible RAM. We do it all the time here with NO problems. I did it on this machine I am using now. And it works great in dual channel.

In fact, it was easier and less expensive than replacing two smaller sticks with two bigger sticks - especially since the two pulled sticks don't even make good paper weights. Yeah, you might be able to sell them to recoup some money, but one should not count on a buyer wanting used, small sticks.

Where the reputation for "harder to run" comes in is with users who wish to tweak the clocks and operating voltages to over or under clock their systems. In some cases, it takes a little longer to fine tune for stability with 4 sticks instead of 2.

For the vast majority of users who simply wish to increase their RAM and intend to stick with the default settings, as the OP stated he intended, simply adding 2 more sticks is not harder to do and not harder to run.

Are there exceptions? Of course. But replacing 2 sticks with 2 bigger sticks does not always happen problem free either.

I mean seriously! Would it make sense for ASRock, Gigabyte, ASUS, MSI and other major motherboard makers to even make 4 slot motherboards if using 4 sticks was hard or problematic? Stick with the default settings and the odds are greatly in your favor you will have zero problems - assuming, of course, you do your homework and buy compatible RAM - the same requirement regardless if your board supports 2 or 4 (or 6 or 8) slots.