[SOLVED] Quad Channel Ram 4x8 2666 on Ryzen 5 1400

[patrickimperial14]

New pc builder here, So i got a r5 1400, rog b350-f, and currently 1x8 gb of 2666 ram, is it possible to get 3 more same modules to make it quad channel? Will my system handle it?

 

[kanewolf]

It is not possible to have quad channel RAM on a Ryzen CPU. The CPU is only dual channel hardware. You can have 4 DIMMs, but they will be dual channel not quad channel. BUT, it is not optimum. Two DIMMs in a dual channel CPU will give you the maximum clock speed and maximum throughput.

Being able to buy "3 more same modules" is not guaranteed. Even the same model number could be different internally. The only guaranteed way to get memory that works as a set it to buy it as a set. Two matched DIMMs as a set. Any other mix-and-match RAM is a gamble.

 

[patrickimperial14]

It is not possible to have quad channel RAM on a Ryzen CPU. The CPU is only dual channel hardware. You can have 4 DIMMs, but they will be dual channel not quad channel. BUT, it is not optimum. Two DIMMs in a dual channel CPU will give you the maximum clock speed and maximum throughput.

Being able to buy "3 more same modules" is not guaranteed. Even the same model number could be different internally. The only guaranteed way to get memory that works as a set it to buy it as a set. Two matched DIMMs as a set. Any other mix-and-match RAM is a gamble.

wait so there is no actual difference between 2x8 and a 4x8 in terms of significant speed? And that means im stuck with 16 gb ram at 2666?

 

[kanewolf]

There is no performance improvement with 4x8GB unless you are talking about running VMs or large video editing. 2x8GB will allow you the highest RAM clock speeds. If you need 32GB, then you should buy 2x16GB rather than another 2x8GB.

 

[huntlong]

On both Ryzen and Intel consumer parts (Ryzen 3-7 and Intel Core i3-i9) there is only support for dual channel ram. You can use 4 sticks but they will still run in dual channel. Your PC will pretty much treat 2 sticks as one and the other 2 sticks as one. 4 sticks have no advantage over two but 4 sticks won’t really hurt your performance either.

Why do you need that much ram? Unless you’re positive you need 32gb of ram you’ll see better performance with a new 16gb kit of 3000mhz ram.

 

[kanewolf]

On both Ryzen and Intel consumer parts (Ryzen 3-7 and Intel Core i3-i9) there is only support for dual channel ram. You can use 4 sticks but they will still run in dual channel. Your PC will pretty much treat 2 sticks as one and the other 2 sticks as one. 4 sticks have no advantage over two but 4 sticks won’t really hurt your performance either.

Why do you need that much ram? Unless you’re positive you need 32gb of ram you’ll see better performance with a new 16gb kit of 3000mhz ram.

Four DIMMs will usually not run at maximum overclock on Ryzen, especially. You might get 2933 or 3200 on two DIMMs but only 2400 on four. There can be downsides to four DIMMs.