Upgrading from 3200Mhz ram to 4000Mhz ram, A performance improvement? (Ryzen 5800X / 3080ti)

[Roomba Main]

Hi,

 

I am unsure how RAM affects performance, same with CL numbers, is lower better or higher better? I somewhat understand RAM however I am unsure if a Jump from 3200Mhz CL16 to 4000Mhz CL18 will give me extra performance? Doesn't Ryzen get faster with higher speed RAM. I was looking at going from my Corsair 163301 Vengeance LPX 32 GB (2 x 16 GB) DDR4 3200 MHz C16 to G.Skill Trident Z Royal Series 32GB (2 x 16GB) 288-Pin SDRAM DDR4 4000 (PC4-32000) CL18. Is this upgrade worth it? or shall I keep with my 3200 RAM as I would only gain a few fps if anything? Thank you.

 

My specs are:

Ryzen 5800X

MSI B550I Gaming edge Wifi (mini-ITX)
Corsair 163301 Vengeance LPX 32 GB (2 x 16 GB) DDR4 3200 MHz C16

3080Ti FE

Corsair 750W PSU

Coolermaster NR200P

[Pixelfie]

Don't upgrade, performance difference is very low. Not only that but you'll only notice it in CPU heavy applications. You could try an OC on the RAM, maybe you could reach like 3600.

 

For the CL, lower is better. In the case of 3200 CL16 vs 4000 CL18 the 4000 would still be better, but not worth it if you already have the 3200.

[Chris Pratt]

Generally speaking, the more memory bandwidth the better, regardless of platform. However, not all applications or usage scenarios necessarily benefit from higher memory bandwidth, so the actual amount of performance increase you can expect can vary wildly depending on what you're actually doing.

 

Ryzen has some added wrinkles here, because of the infinity fabric. That's the communication layer between the CCDs and I/O die. A 5800X is a single CCD design, so you get some benefit from being able to clock the infinity fabric higher for the I/O die, but not as much as you'd see on chips like the 5900X and 5950X, which have multiple CCDs.

 

That said, ideally the FCLK (infinity fabric clock) and memory clock should run 1:1 for best performance, and it's not always possible to run the FCLK at 2000MHz. You could run async (not 1:1), but that can introduce a performance penalty of up to 25% in some scenarios. You'd need to make that up with much higher memory bandwidth; 4000MHz isn't going to cut it. As a result, you may need to actually downclock the RAM to 3800MHz, 3866MHz, etc. for best performance, depending on how high you can get the FCLK to go.

[LIGISTX]

33 minutes ago, Chris Pratt said:

Generally speaking, the more memory bandwidth the better, regardless of platform. However, not all applications or usage scenarios necessarily benefit from higher memory bandwidth, so the actual amount of performance increase you can expect can vary wildly depending on what you're actually doing.

 

Ryzen has some added wrinkles here, because of the infinity fabric. That's the communication layer between the CCDs and I/O die. A 5800X is a single CCD design, so you get some benefit from being able to clock the infinity fabric higher for the I/O die, but not as much as you'd see on chips like the 5900X and 5950X, which have multiple CCDs.

 

That said, ideally the FCLK (infinity fabric clock) and memory clock should run 1:1 for best performance, and it's not always possible to run the FCLK at 2000MHz. You could run async (not 1:1), but that can introduce a performance penalty of up to 25% in some scenarios. You'd need to make that up with much higher memory bandwidth; 4000MHz isn't going to cut it. As a result, you may need to actually downclock the RAM to 3800MHz, 3866MHz, etc. for best performance, depending on how high you can get the FCLK to go.

This is pretty damn accurate.

 

OP, TLDR; not worth it... Just enjoy your 3000 MHz

 

If you want to try and see if you can up your current RAM at all, read this, fully understand it, google things you don't understand, spend a solid few days to really try and learn, and then jump in. RAM overclocking is not easy, its not for the faint of heart, and you can't cut corners. Unstable RAM will bite you in the a$$ down the line, I guarantee it. But done correctly and methodically, and properly tested for stability, its fine and a little bit fun  https://github.com/integralfx/MemTestHelper/blob/oc-guide/DDR4 OC Guide.md

[xg32]

only worth it if it benefits a majority of games you play and you are sure that it'll even run 4000...

 

in general i'd expect a 5% boost only in niche cases for 250usd~, even for a 3080ti that's inefficient, and i dont expect ddr4000 to just boot on zen 3.

 

iirc i did go from 132fps avg to 144fps in hitman 2 and 3 with 10% improvement in 1% lows going from ddr3200 to 4000, but that was the only game with those results, i expect games like AOE4 and total war to see the same benefits, but ddr4000 also runs alot hotter even compared to 3666.

[Roomba Main]

Hi everyone, thank you for your replies, they have been very informative. I think I will just stay with my current RAM. Thank you all!