Is Ryzen 5 3400G a bottleneck?

According to this Website that shows you which processor and GPU card work together well or not: https://pc-builds.com/calculator/

The website doesn't yet have the RX6600XT but the latest AMD GPU Card they have is the RX5700XT.

The results is that with the Ryzen 5 3400g and RX5700XT both will work very well with 1440P & 2160P/4K but not with 1080P which will cause the processor to bottleneck.

But the RX6600XT is much faster and powerful then the RX5700XT so I imagine the results will be worse for at least 1080P.

Amr Ibrahim said:

SETUP :
B450M S2H
Ryzen 5 3400G
2x8GB @ 3000GHz

I wanted to buy a new RTX GPU . I've read that 3400G bottlenecks the RTX 3060 by a fair amount! But it's a smooth 60+ FPS on 1080p gaming which I'll be on.

QUESTIONS :
1- Does bottlenecking damages GPU ? " I'll maybe upgrade my CPU in future so am asking if i can buy the RTX 3060 for now "
2- Any other choice for a cheaper RTX GPU and a CPU Upgrade without such high bottleneck?

Click to expand...

Just buy a GPU that:

• Is appropriate for the resolution and FPS you're intending to play.
• Offers the best price--performance in that performance tier.

1. CPU figures out what needs to be in a given frame (imagine a rough sketch) based on user and game world input. Issues draw call to GPU to tell it what to render.
2. GPU receives draw call and makes a pretty picture. Sends to monitor when complete.
3. The GPU can't do any work until the CPU tells it what to draw. Raising graphics settings and/or resolution increases the complexity of the GPU's job, making it take longer to render each frame. Lowering settings decreases the complexity of the GPUs job making it take less time to render each frame.
4. If the GPU finishes rendering a frame before the CPU has finished figuring out what the next frame should contain, the GPU has to wait (<100% GPU usage).
5. Based on #3 & #4, you should be able to optimize for 90% or greater GPU usage (depending on a game's CPU stress and the CPU/GPU balance of a system)
6. CPU usage is usually reported as active time across all available threads of a CPU. Most* games don't leverage more than....6-7 threads. Monitoring CPU usage isn't really useful.

• Some games stress the GPU more than the CPU. If you ever see them in a CPU round-up review, you'll see very little difference in FPS between various GPUs (Battlefield games are historically GPU-bound). Because of game-to-game variability in CPU stress (which is what you're concerned about) it's not always a clear cut answer.
• The term "bottleneck" refers to a constraint that doesn't allow the other components in the system to reach its MAXIMUM FPS potential. This is going to depend on the game used, resolution being tested, in-game quality settings, and the GPU/CPU in question. The problem with "bottleneck" is what % of the maximum possible potential is considered a "bottleneck". If there's only a 10% difference in FPS between a $600+ CPU and a $150 CPU, is that a bottleneck? What if the difference is 30%? etc etc.
• https://www.tomshardware.com/reviews/cpu-hierarchy,4312.html (using a RTX3090 to minimize GPU bottlenecks)

I have a Ryzen 5 3400g for a CPU and I bought a 1660 super but I am not getting the performance I was expecting.  Does anyone know if the problem could be my CPU bottlenecking my GPU?

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• Chris Pratt

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Posted April 8, 2021

Nope.

CPU: AMD Ryzen 9 5900X · Cooler: Artic Liquid Freezer II 280 · Motherboard: MSI MEG X570 Unify · RAM: G.skill Ripjaws V 2x16GB 3600MHz CL16 (2Rx8) · Graphics Card: ASUS GeForce RTX 3060 Ti TUF Gaming · Boot Drive: 500GB WD Black SN750 M.2 NVMe SSD · Game Drive: 2TB Crucial MX500 SATA SSD · PSU: Corsair White RM850x 850W 80+ Gold · Case: Corsair 4000D Airflow · Monitor: MSI Optix MAG342CQR 34” UWQHD 3440x1440 144Hz · Keyboard: Corsair K100 RGB Optical-Mechanical Gaming Keyboard (OPX Switch) · Mouse: Corsair Ironclaw RGB Wireless Gaming Mouse

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• leclod

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Posted April 8, 2021

What performance are you getting and what were you expecting ?

I say this should be alright.

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• steelo

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Posted April 8, 2021

5 minutes ago, EvoBuilds said:

I have a Ryzen 5 3400g for a CPU and I bought a 1660 super but I am not getting the performance I was expecting.  Does anyone know if the problem could be my CPU bottlenecking my GPU?

No, you should have plenty of headroom with that CPU.

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• minibois

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Posted April 8, 2021

5 minutes ago, EvoBuilds said:

I have a Ryzen 5 3400g for a CPU and I bought a 1660 super but I am not getting the performance I was expecting.  Does anyone know if the problem could be my CPU bottlenecking my GPU?

They would work well together.

Of course there will be situations where the GPU can do more than the CPU, but that is something you would see with any PC.

Some games like - CS:GO for example - just run more based on the CPU rather than the GPU and there are other games - such as the Witcher 3 - that are the opposite.

In what situations are you not getting the performance you expected? How did you measure and compare it?

"We're all in this together, might as well be friends" Tom, Toonami.

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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