Ryzen + 3200 CL14 ram kits

[Tanner208]

So, I was wondering how much of a performance boost in gaming do you get when you pair expensive ram with the ryzen chips more specifically the R 5 1600. Is it worth spending the extra money on $200 ram kits vs like $100 - $150 ddr4 2400 ram kits? Or is it better to just get an intel chip and skimp out on the ram?

[DocSwag]

Depends on what GPU and games

[Tanner208]

so lets say gaming @ 1440p for games like Witcher 3, Assassins Creed: Origins, Destiny 2, GTA5, WoW, ESO, ARK, PUBG

 

Does higher clock speed on ram increase the single thread performance of the CPU or the IPC or is some other measure of performance?

[Thinkfreely]

So intel isn't nearly affected as much by Ram speed as Ryzen is. So its going to vary game to game, but in my personal tests going from 2133 to 2993 with all other factors considered netted as much as 10-15 FPS gains on average, on a few titles like Battlefield 1 and PUBG it was closer to 20 FPS so your miles may vary.

[johndms]

http://forum.asrock.com/forum_posts.asp?TID=4963&title=ryzen-ram-frequency-and-gaming

[Tanner208]

12 minutes ago, Thinkfreely said:

So intel isn't nearly affected as much by Ram speed as Ryzen is. So its going to vary game to game, but in my personal tests going from 2133 to 2993 with all other factors considered netted as much as 10-15 FPS gains on average, on a few titles like Battlefield 1 and PUBG it was closer to 20 FPS so your miles may vary.

 

Yea I know Ryzen takes advantage of higher ram clock speeds over intel but I'm trying to determine if its more lucrative to buy a R5 1600 paired with expensive ram or if I should just buy an expensive coffee lake cpu that just has more raw power.

 

For example: Ryzen 5 1600 + 3200 CL 14 ram kit vs i5 8600k + 2400 ram kit

[cj09beira]

10 minutes ago, Thinkfreely said:

So intel isn't nearly affected as much by Ram speed as Ryzen is. So its going to vary game to game, but in my personal tests going from 2133 to 2993 with all other factors considered netted as much as 10-15 FPS gains on average, on a few titles like Battlefield 1 and PUBG it was closer to 20 FPS so your miles may vary.

what resolution thought, and what were the frame rates (10fps gain over 10 is much more important than over 200)

[DocSwag]

10 minutes ago, Tanner208 said:

so lets say gaming @ 1440p for games like Witcher 3, Assassins Creed: Origins, Destiny 2, GTA5, WoW, ESO, ARK, PUBG

 

Does higher clock speed on ram increase the single thread performance of the CPU or the IPC or is some other measure of performance?

In general, higher speed RAM can increase CPU IPC, because it essentially allows for higher bandwidth and lower latency leading to less time that the CPU spends waiting on RAM, which leads to higher IPC.

 

However, in the case of Ryzen it's a little bit different. With Ryzen, memory bandwidth/latency isn't the main reason you want faster RAM; instead it's the infinity fabric.

 

In a Ryzen CPU there are two CCXs (Core Complex), each with 4 cores and 8 MB L3 cache. When you look at latency between cores that are in the same CCX, it's all fine. Latency is pretty acceptable at around 20-30 ns. However, if you look at accesses between cores that's when the issues start.

 

While latency between cores in the same CCX is under 30 ns, if you look at latency between cores in different CCXs all of a sudden you're looking at over 100 ns! This means, if a core needs to access data in the L1, L2, or L3 cache that belongs in the other CCX it's going to be waiting almost as long as if it was going out to RAM. This can be a huge issue.

 

The clock speed of the fabric that connects the two CCXs is directly linked to the clock speed of your RAM. If you ram is 2133 MHz, this fabric runs at 1066 MHz. If your RAM is 3200 MHz, the fabric runs at 1600 MHz. As you could imagine, higher clock speeds for the fabric is better as it means higher bandwidth and more importantly lower latency. This is why ram frequency is so important on Ryzen: It's not because it needs faster ram, but because the ram affects something else. This results in the CPU being able to achieve higher IPC.

 

As to how much this affects performance... it depends. Unless you're looking at a high end gpu (1080 or 1080 ti) at lower resolutions (1080p and maybe 1440p with a 1080 ti) you won't have much of a difference even with 2133 MHz vs 3200 MHz. Even if you are using a 1080 or 1080 ti at 1080p it still depends on the game. Some games like GTA V, or Watch Dogs 2 (which REALLY sees a benefit from faster RAM) can see a good benefit from using higher frequency RAM, whereas other games like BF1 can see little to no benefit.

[DocSwag]

Just now, Tanner208 said:

 

Yea I know Ryzen takes advantage of higher ram clock speeds over intel but I'm trying to determine if its more lucrative to buy a R5 1600 paired with expensive ram or if I should just buy a coffee lake cpu that just has more raw power.

 

For example: Ryzen 5 1600 + 3200 CL 14 ram kit vs i5 8600k + 2400 ram kit

You don't need CL14 RAM, 3200 CL14 is expensive as hell. Just get a cheaper 3000 MHz kit.

[Thinkfreely]

1 minute ago, cj09beira said:

what resolution thought, and what were the frame rates (10fps gain over 10 is much more important than over 200)

1080p and 1440p. I have a 1440p 165 hz gysnc monitor and a 4k monitor. Usually I will play single player titles (Skyrim IMO) at 4k as I enjoy the graphical experience and don't need as many frames, but ram speed has no impact there. The biggest gains I saw where with 1080p (PUBG Battlefield) and 1440p (Overwatch, ark)

[Thinkfreely]

2 minutes ago, DocSwag said:

You don't need CL14 RAM, 3200 CL14 is expensive as hell. Just get a cheaper 3000 MHz kit.

Agree the difference between a 3200 kit and 3000 kit are going to be completely negligible.

[Tanner208]

7 minutes ago, DocSwag said:

You don't need CL14 RAM, 3200 CL14 is expensive as hell. Just get a cheaper 3000 MHz kit.

So with a GTX 1080 @ 1440p, I should stick with Ryzen + 3000 ram kit over say a i5-8600k + 2400 ram kit?

 

I know intel will still win every time but I'm just wondering whats the better value.

 

I will be overclocking btw.

[Thinkfreely]

5 minutes ago, Tanner208 said:

So with a GTX 1080 @ 1440p, I should stick with Ryzen + 3000 ram kit over say a i5-8600k + 2400 ram kit?

 

I know intel will still win every time but I'm just wondering whats the better value.

 

I will be overclocking btw.

So the i5 8600k performs in gaming exactly the same as the 8700k, only difference is threads. If your using this as a purely gaming rig I would go with the i5 8600k and 2400 kit. It will be more then enough for a while.

If you plan on doing more creation, streaming, content etc, and you want to be able to upgrade without swapping mobos for a bit the go with Ryzen. 

[DocSwag]

13 hours ago, Tanner208 said:

So with a GTX 1080 @ 1440p, I should stick with Ryzen + 3000 ram kit over say a i5-8600k + 2400 ram kit?

 

I know intel will still win every time but I'm just wondering whats the better value.

 

I will be overclocking btw.

If you're looking at performance, the 8600k combo will be faster than the 1600 combo.

 

As long as ram frequency is above 2133 an 8600k is always gonna beat a 1600

[epsilon84]

https://www.gamersnexus.net/hwreviews/3157-intel-i5-8600k-review-overclocking-vs-8700k-8400/page-2

 

The 8600K would be the way to go, even with slower memory (take 5% off those scores above and you'll get the approximate 8600K performance with slower RAM)