What's causing such a huge performance gap?

[Leychee]

Hello! A friend and I just upgraded to a 6950XT, but there's a significant gap in performance between our two rigs.

I have a 5800X, he has an i7 9700 CPU. While playing Darkside, for example, he sometimes spikes to 45 FPS, whereas I'm always above 60. We're both playing on max settings, 1440p, both 16GB of RAM, same case and fans, if that helps.

What's causing his frames to be significantly lower than mine? Could it be his CPU? We'd like to pinpoint the problem before eventually getting new components.

 

If you need any extra information, let me know.

 

Thanks for your help!

 

 

[PDifolco]

7 minutes ago, Leley said:

Hello! A friend and I just upgraded to a 6950XT, but there's a significant gap in performance between our two rigs.

I have a 5800X, he has an i7 9700 CPU. While playing Darkside, for example, he sometimes spikes to 45 FPS, whereas I'm always above 60. We're both playing on max settings, 1440p, both 16GB of RAM, same case and fans, if that helps.

What's causing his frames to be significantly lower than mine? Could it be his CPU? We'd like to pinpoint the problem before eventually getting new components.

 

If you need any extra information, let me know.

 

Thanks for your help!

 

 

Simple, his "old" 9700 is a bottleneck, its single core perf (what matters in game) is around 25-30% worse than a 5800X, and it has 8C/8T, no hyperthreading...

 

[podkall]

Your CPUs clock same speed, but yours for each Core there are 2 threads like @PDifolco said

 

Ryzen also utilises faster RAM more effectively than same year or older Intel

Edited November 24, 2022 by podkall
eeeeeeeeedit

[PDifolco]

1 minute ago, podkall said:

Your CPUs clock same speed, but yours for each Core there are 2 threads like @PDifolco said

 

Clocks may be around same, but IPC is much better on Ryzen 5000s than they were on Intel 9th gen (which is end of the old stagnation era from 4th to 9th gen before AMD made finally Intel wake up from slumber  )

[podkall]

1 minute ago, PDifolco said:

Clocks may be around same, but IPC is much better on Ryzen 5000s than they were on Intel 9th gen (which is end of the old stagnation era from 4th to 9th gen before AMD made finally Intel wake up from slumber  )

yep, and the memory that I edited in my answer, intel's supported is 2666MT Ryzen is 3200MT

[PDifolco]

1 minute ago, podkall said:

yep, and the memory that I edited in my answer, intel's supported is 2666MT Ryzen is 3200MT

Yes, and even more up to 3600/4000 (my RAM runs at 3600MT)

[podkall]

1 minute ago, PDifolco said:

Yes, and even more up to 3600/4000 (my RAM runs at 3600MT)

ofc, the supported is just a metric of how much overclocked ram can CPU roughly take and how much stressed will the memory controller get

Edited November 24, 2022 by podkall
edit

[Leychee]

Thanks for all the help guys! I also just learned that he had 16GB of 2133MHz RAM... He finally decided to get a 5800X as well (X3D if there are any in stock), that should fix the issue.

[podkall]

12 minutes ago, Leley said:

Thanks for all the help guys! I also just learned that he had 16GB of 2133MHz RAM... He finally decided to get a 5800X as well (X3D if there are any in stock), that should fix the issue.

is his ram 2133Mhz or does just run at that frequency?

[Leychee]

31 minutes ago, podkall said:

is his ram 2133Mhz or does just run at that frequency?

His ram is actually 2133MHz...

[podkall]

12 minutes ago, Leley said:

His ram is actually 2133MHz...

well, that would be another factor

[Leychee]

10 minutes ago, podkall said:

well, that would be another factor

Absolutely, is 3000MHz enough? That's what I have, and I've been told it's subpar

[-rascal-]

3 hours ago, Leley said:

Absolutely, is 3000MHz enough? That's what I have, and I've been told it's subpar

 

The CCX communication bus between the CPU Core dies runs 1:1 with the RAM frequency. So the higher the RAM frequency, the faster the communication bus.

 

DDR4-3000 should be okay, however the speed spot for maximum performance is around DDR4-3600 ~ DDR4-3800.

 

With that said, DDR4-3200 / DDR4-3400 CL16 or DDR4-3600 CL18 (CL16 if you can afford/find them) would be better.

 

If DDR4-3000 is the only thing within budget, it should be fine. It will be definitely better than the i7-9700 with DDR4-2133 memory that's for damn sure.

[Leychee]

13 hours ago, -rascal- said:

 

The CCX communication bus between the CPU Core dies runs 1:1 with the RAM frequency. So the higher the RAM frequency, the faster the communication bus.

 

DDR4-3000 should be okay, however the speed spot for maximum performance is around DDR4-3600 ~ DDR4-3800.

 

With that said, DDR4-3200 / DDR4-3400 CL16 or DDR4-3600 CL18 (CL16 if you can afford/find them) would be better.

 

If DDR4-3000 is the only thing within budget, it should be fine. It will be definitely better than the i7-9700 with DDR4-2133 memory that's for damn sure.

 

Thank you for the detailed response! I'll take a look.

[podkall]

22 minutes ago, Leley said:

 

Thank you for the detailed response! I'll take a look.

do you need a faster ram or your friend?

[NF-A12x25]

19 hours ago, podkall said:

ofc, the supported is just a metric of how much overclocked ram can CPU roughly take and how much stressed will the memory controller get

nope- supported is JEDEC. Basically the highest it will run without XMP. Most kits have a JEDEC speed of 2133 or more rarely 2666, but 3200 JEDEC kits exist.

[podkall]

5 minutes ago, NF-A12x25 said:

nope- supported is JEDEC. Basically the highest it will run without XMP. Most kits have a JEDEC speed of 2133 or more rarely 2666, but 3200 JEDEC kits exist.

13600k supports 5600MT on DDR5, if it doesn't work on XMP it's motherboard's fault or bad RAM fitting

[NF-A12x25]

1 minute ago, podkall said:

13600k supports 5600MT on DDR5, if it doesn't work on XMP it's motherboard's fault or bad RAM fitting

what does this have to do with what I said? Officially supported speeds are the highest a CPU and/or motherboard will run a kit AT JEDEC- this doesn’t change that

[podkall]

35 minutes ago, NF-A12x25 said:

what does this have to do with what I said? Officially supported speeds are the highest a CPU and/or motherboard will run a kit AT JEDEC- this doesn’t change that

what about OC supported on motherboard?

[NF-A12x25]

Mobos will list JEDEC speeds supported, and then put something like 3600(OC) 4000(OC) 4133(OC) etc and that (OC) means it’s an XMP kit