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2 ram sticks vs 4 sticks of 64Gb on ryzen build?

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Posted · Original PosterOP

Looking to upgrade the ddr4 pny anarchy ram in my system from 16gb's to 64gb's. When using 64gb's would you want to run 4 sticks do to the memory controller and the speed that the space population on the ram is accessible, or is running 2sticks of 32gb fine? The system will be used for virtual machines (for school), playing triple A game titles, and possibly in the future over clocking (but that's not determined yet). 

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1 minute ago, depressedcoffee said:

Looking to upgrade the ddr4 pny anarchy ram in my system from 16gb's to 64gb's. When using 64gb's would you want to run 4 sticks do to the memory controller and the

4 sticks is harder to run at higher speeds

 

higher capacity is harder to run at higher speeds in general as well I think.

 

32GBs is probably plenty though, how much does every VM actually need?

Also what CPU?


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go 4 sticks wherever you can


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4 minutes ago, Jumballi said:

go 4 sticks wherever you can

lol what? That makes no sense, and honestly, is wrong.


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1 minute ago, dizmo said:

lol what? That makes no sense, and honestly, is wrong.

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks


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5 minutes ago, Jumballi said:

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks

Not getting more bandwidth on Ryzen beyond dual channel. 4 sticks is just harder on the imc


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4 sticks isnt as good as 2 sticks usually, but in this case there simply arent high frequency 32GB sticks available at all so 4 sticks of 16GB DDR4 3000MHz+ CL16 is better.

 

5 minutes ago, Jumballi said:

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks

He's on a dual channel platform, no such benefit.


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2 minutes ago, dizmo said:

lol what? That makes no sense, and honestly, is wrong.

^^^ I mean for me it isn't lol, but I run HEDT. Going for 4 sticks makes sense because I can still use quad channel while having 4 slots free (on an ATX or larger mobo) in case I need more capacity in future. On mainstream, there's much less reason to go for 4 sticks. In fact in most cases you want to avoid it, as it's harder on the IMC when running higher clocked RAM, and using all your slots in one go means you can't add more later without replacing your kit and then buying a new kit that's at least as big as the old one plus whatever you wanted to add on top. 

OP, if you'll only need 64GB and don't see yourself going up in future, then just run whichever is the cheapest 2 or 4 stick kit that gets you there. If you need to possibly add more in future, then go for a 2x32GB kit. What are the VMs doing anyways that needs that much RAM though? Also what CPU are you actually running?
 

3 minutes ago, Jumballi said:

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks

No. Mainstream just runs it in two sets of dual channel. HEDT from X79 forwards will run 4 sticks in quad channel or 8 sticks in two sets of quad channel. And Intel's latest Xeons will run 6 sticks in hexa channel or 12 sticks in two sets of hexa channel. And X58 would run 3 sticks in triple channel or 6 sticks in two sets of triple channel. All the HEDT options will still run two sticks in dual channel, X58 would run 4 sticks in dual channel, actually losing bandwidth. I don't know if Intel's Xeons would run 4 sticks in quad or drop all the way to dual. 


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7 minutes ago, Jumballi said:

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks

Thats not true at all.


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5 minutes ago, Jumballi said:

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks

Nope, for reasons already said above.

5 minutes ago, Zando Bob said:

^^^ I mean for me it isn't lol, but I run HEDT. Going for 4 sticks makes sense because I can still use quad channel while having 4 slots free (on an ATX or larger mobo) in case I need more capacity in future. On mainstream, there's much less reason to go for 4 sticks. In fact in most cases you want to avoid it, as it's harder on the IMC when running higher clocked RAM, and using all your slots in one go means you can't add more later without replacing your kit and then buying a new kit that's at least as big as the old one plus whatever you wanted to add on top.

Shut up HEDT elitist! 😛 Yeah, it's also harder to overclock the modules when you're using 4 sticks on a dual channel platform...probably not an issue here, but still noteworthy. Just another reason I'm glad I only use air coolers, I don't have the urge to fill out all the slots as they're usually hidden by the cooler 😂


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25 minutes ago, Jumballi said:

in most situations where you can go 4 sticks, you stand to gain extra bandwith and speed, which is very helpful with ryzen, unless your on server side with more numa nodes, but those already support more channels out of the box, making it still the better option to go 4 sticks

no, lol. you're mistaking 1 and 2 sticks for 2 and 4. AM4 Ryzen can't do Quad-Channel. 2 sticks get you the best performance.


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Posted · Original PosterOP

Hey everyone, thanks for all the replies. The VM's are going be to used for servers. Starting online college soon and going for a networking degree. From what I understand most of the courses will start you out with Windows Server Editions VM's and not sure how many VM's will be running so Im just throwing in a lot of ram. 
The processor is a ryzen 5 2600,

the motherboard is a b450M DS3H. 
The host OS is Windows 10 Pro.

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For that board 4x16gb.  if its for servers or VMs and its all about stability and capacity you'll want something on the QVL, in this case whichever has decent speed kits you can afford that are supported for all 4 slots, for your generation of cpu (Pinnacle Ridge) by your motherboard is best call 

https://download.gigabyte.com/FileList/Memory/mb_memory_b450m-ds3h_pinnacle.pdf

2 slots could be superior for gaming machines because usually 2 of the dimms are stronger, will run with higher validated speed or tighter timings that the other 2 can't, but it doesn't sound at all like this is the only concern for you. 

There should be more kits then what i found briefly going through QVL, but in quick glance, some stuff from NewEgg that is on QVL and still available (not all kits are 4x stick kits, some only come with 2 dram kits etc)

3000 Speed (best for gaming without costing a complete fortune)
https://www.newegg.com/hyperx-64gb-288-pin-ddr4-sdram/p/N82E16820104701 
There is 2 stick variant if you wanted to buy just 32gb now and get another 32gb later for VMs, but value is worse
https://www.newegg.com/hyperx-32gb-288-pin-ddr4-sdram/p/N82E16820104700?Description=HX430C15PB3K2%2f32&cm_re=HX430C15PB3K2%2f32-_-20-104-700-_-Product

2600 speed in black or red
https://www.newegg.com/corsair-32gb-288-pin-ddr4-sdram/p/N82E16820233853?Description= CMK32GX4M2A2666C16&cm_re=CMK32GX4M2A2666C16-
https://www.newegg.com/corsair-32gb-288-pin-ddr4-sdram/p/N82E16820233865?Description=CMK32GX4M2A2666C16R&cm_re=CMK32GX4M2A2666C16R-_-20-233-865-_-Product

etc etc... If you wanted to do more research then i think reviewing QVL and copying over modules into search (on newegg etc) for stuff at 2666 speed is safest bet as its not too slow, and there is most choice looking through QVL there for supported 4 x 16gig on all 4 dimms, i didn't bother to post 3200-3000-2800 speed kits that were exceedingly expensive, if speed is a concern then top link is only one i can vouch for that i could find available on the egg that wasn't like 500$+

Reminder and Note: I wrote all this with bias towards running VMs, not so much gaming. If it was just gaming i'd recommend no more then 16gb in 2x8 format. 

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