Memory upgrade or downgrade..?

[Indyski]

So I am in the process of building my first gaming PC. Specs are as listed... Asus Rog Strix B550 itx MB, Ryzen 7 5800x CPU, Asus Rog Ryuo 120mm AIO, Samsung 980 Pro 2tb M.2, Gskil Ripjaw 32gb 4000mhz CL18, Radeon rx6900xt GPU, Corsair rm850 PSU, 2 140mm Corsair case fans all in a Thermaltake Tower 100 case. Also I set up the AIO as a push/pull with 2 Noctua 120 no-p12 redux 1700 pwm fans. Three questions... do the specs seem good? Would it be better to go to 16gb of memory at 3600mhz with a CL of 16? And finally what would be the best way to cool everything?

[darkDOS]

How many DIMMS in either configuration?

 

The formula is (2000/MHz) * CAS.

So, by the numbers the 3600MHz is actually faster. But, how many DIMMS matters.

[Haraikomono]

4 minutes ago, Indyski said:

So I am in the process of building my first gaming PC. Specs are as listed... Asus Rog Strix B550 itx MB, Ryzen 7 5800x CPU, Asus Rog Ryuo 120mm AIO, Samsung 980 Pro 2tb M.2, Gskil Ripjaw 32gb 4000mhz CL18, Radeon rx6900xt GPU, Corsair rm850 PSU, 2 140mm Corsair case fans all in a Thermaltake Tower 100 case. Also I set up the AIO as a push/pull with 2 Noctua 120 no-p12 redux 1700 pwm fans. Three questions... do the specs seem good? Would it be better to go to 16gb of memory at 3600mhz with a CL of 16? And finally what would be the best way to cool everything?

depends highly on your workload, i also have 32gb of ddr4 ram, and use around 30% all day and only seeing high usage when doing some mem intensiv work.

 

[MCCP]

Both of those memory kits have similar latency (it usually goes like this: (CAS latency/frequency)*1000=latency in nanoseconds ), so as long as they're both dual channel, I'd go for 32GB, although the 16 might overclock better.

 

The specs seem good to my eye, although I don't know if the 120mm rad is gonna cut it. Consider at least 240mm.

 

If the case has good airflow, just the stock fans + the radiator fans are gonna be more than enough.

[shoutingsteve]

2 minutes ago, darkDOS said:

How many DIMMS in either configuration?

Yes, good question. I imagine you would be using two DIMMs in either case (confirm the voltages during setup).  I would recommend the 32g 4000 with the cas latency of 18.  Since you will be gaming, you would need the ram space more than ram speed because vRAM will do a lot of the heavy lifting.

[Skiiwee29]

<-- moved to CPUs, Motherboards, and Memory -->

[Indyski]

11 minutes ago, darkDOS said:

How many DIMMS in either configuration?

 

The formula is (2000/MHz) * CAS.

So, by the numbers the 3600MHz is actually faster. But, how many DIMMS matters.

2 DIMMS

[Indyski]

10 minutes ago, MCCP said:

Both of those memory kits have similar latency (it usually goes like this: (CAS latency/frequency)*1000=latency in nanoseconds ), so as long as they're both dual channel, I'd go for 32GB, although the 16 might overclock better.

 

The specs seem good to my eye, although I don't know if the 120mm rad is gonna cut it. Consider at least 240mm.

 

If the case has good airflow, just the stock fans + the radiator fans are gonna be more than enough.

The case I currently have will only allow for a 120mm AIO

[Mister Woof]

Everyone I know that does Ryzen seems to have the same issues - you're going to be limited by the FLCK anyway after 1800 or 1900mhz (3600/3800) and actually getting to 2000mhz (4000) is pretty much winning the lottery.

 

Echoes across the internet is find a good DDR 3600 kit and be done.

[Indyski]

2 hours ago, MCCP said:

Both of those memory kits have similar latency (it usually goes like this: (CAS latency/frequency)*1000=latency in nanoseconds ), so as long as they're both dual channel, I'd go for 32GB, although the 16 might overclock better.

 

The specs seem good to my eye, although I don't know if the 120mm rad is gonna cut it. Consider at least 240mm.

 

If the case has good airflow, just the stock fans + the radiator fans are gonna be more than enough.

The case I currently have will only allow for a 120mm AIO

[Indyski]

Just now, Indyski said:

The case I currently have will only allow for a 120mm AIO

Would it be wise then to keep my current memory and set it to 3600/3800mhz and set the FCLK to 1800/1900mhz?

[Indyski]

2 hours ago, Mister Woof said:

Everyone I know that does Ryzen seems to have the same issues - you're going to be limited by the FLCK anyway after 1800 or 1900mhz (3600/3800) and actually getting to 2000mhz (4000) is pretty much winning the lottery.

 

Echoes across the internet is find a good DDR 3600 kit and be done.

Would it be wise then to keep my current 4000mhz ram and set it to 3600/3800mhz and set the FCLK to 1800/1900mhz?

[Mister Woof]

4 minutes ago, Indyski said:

Would it be wise then to keep my current 4000mhz ram and set it to 3600/3800mhz and set the FCLK to 1800/1900mhz?

That's what I keep hearing is ending up happening. 

[Indyski]

23 minutes ago, Mister Woof said:

That's what I keep hearing is ending up happening. 

Thanks for the help

[Mister Woof]

Just now, Indyski said:

Thanks for the help

IIRC the 4000 rated chips are more likely to be able to get better timings at 3600 than 3600 rated chips. So if you can get tighter timings at 3600/1800, you'll be in a better spot than cheaper 3600 kits with worse timings.

[Indyski]

3 minutes ago, Mister Woof said:

IIRC the 4000 rated chips are more likely to be able to get better timings at 3600 than 3600 rated chips. So if you can get tighter timings at 3600/1800, you'll be in a better spot than cheaper 3600 kits with worse timings.

I set it to 3800/1900. We’ll see how it works out. Thanks again