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PC Builds Bottleneck Calculator

Andy-Aech
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How much can we/should we trust bottleneck calculators?

 

According to this calculator Bottleneck Calculator | PC Builds (pc-builds.com) playing No Man's Sky at 1440p with an R5 3600 and a 3070 will give a processor bottleneck of over 20%??

 

Does that seem a bit off to anyone else? Because I've watched videos of someone playing No Man's Sky with a 3600 and the cpu was only working between 12 and 55% max. So how can this calculator say playing NMS is going to bottleneck a 3600?

 

I smell BS but if anyone has any clue as to why that calculator is saying that then, please do share.

 

 

 

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10 minutes ago, Andy-Aech said:

will give a processor bottleneck of over 20%??

Here's our test of whether that's bunk or not 

 

What does 20% mean? Does that mean the GPU will be restricted by 20%? Does that mean you'll get 20% less performance? How on earth can we measure a 20% processor bottleneck to verify this figure?

 

Ultimately, bottleneck calculators provide a number that has no real interpretation.

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

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1 hour ago, Fasauceome said:

Here's our test of whether that's bunk or not 

 

What does 20% mean? Does that mean the GPU will be restricted by 20%? Does that mean you'll get 20% less performance? How on earth can we measure a 20% processor bottleneck to verify this figure?

 

Ultimately, bottleneck calculators provide a number that has no real interpretation.

Very true. I thought it was BS really. I just wanted other people take on it.

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Calculators are seemingly just algorithms that don't represent RL experience

What *is* a good indication of CPU bottleneck is when you play a game, aren't  limited by refresh rate or sync, and have your gPU below 100% usage  (tho in some cases it's due to game engine limitations, like in GTA5)

System : AMD R9 5900X / X570 AORUS PRO/ 2x16GB Corsair Vengeance 3600CL18 (OCed to CL16)/ RTX3080 Gigabyte EAGLE GPU/ Phanteks P600S case / Customized Watercooling Eisbaer 280mm + Eiswolf2 360mm + VPP755 pump  and 150mm reservoir0.5TB Sabrent Rocket + 2TB WD SN850 NVme Gen4 + 4TB Toshiba X300 HDD drives/ Corsair RM850x PSU/ 34" 120Hz 3440x1440p Alienware AW3420DW monitor / Logitech G915TKL keyboard (wireless) / Logitech G PRO X Superlight mouse

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It is silly.

I ran my 5900x, i9 11900k and i9 10900k with a RTX 3090 at 4k and it said the 3090 it too weak for the CPUs.

 

In reality it is the other way around. I need more CPU to get more frames out of a 3090 at 4k. 

On 8/19/2022 at 5:53 PM, Fasauceome said:

Here's our test of whether that's bunk or not 

 

What does 20% mean? Does that mean the GPU will be restricted by 20%? Does that mean you'll get 20% less performance? How on earth can we measure a 20% processor bottleneck to verify this figure?

 

Ultimately, bottleneck calculators provide a number that has no real interpretation.

I use games to get an idea when a CPU is no longer capable of getting the most frames out of a GPU since their % means somthing.

 

I use the game Shadow of the Tomb Raider to compare CPUs with an equal amount of cores.

Looks like this.

 

5800X with SOTTR at the highest preset.

GPU Bound        1080p    1440p       4k

RTX 2080 ti          48%       98%     100%

RTX 3080 ti          38%       84%     100%     

With an i9 9900k

RTX 2080 ti         36%       86%      100%

RTX 3080 ti           2%       48%      100%   

 

Then when I add frames it becomes more clear.

RTX 2080 ti      1080p      1440p        4k

i9 9900k          168fps      123fps      67fps

5800x              160fps      122fps      73fps

RTX 3080 ti 

i9 9900k          169fps      154fps      96fps

5800x              198fps      163fps      96fps

 

So with this game an upgrade from a 2080 ti to a 3080 ti with an i9 99000k at 1080p is pointless. At 1440p is livable but not idle and at 4k it is still doing fine.

 

SOTTR is at the extreme when it come to CPU bottlenecks so it is the worst case. There are games like Horizon Zero Dawn that are GPU bound even at 1080p so it is the best case.

 

RIG#1 CPU: AMD, R 9 5900X| Motherboard: X570 AORUS Master | RAM: Corsair Vengeance RGB Pro 32GB DDR4 3200 | GPU: EVGA FTW3 ULTRA  RTX 3090 ti | PSU: EVGA 1000 G+ | Case: Lian Li O11 Dynamic | Cooler: EK 360mm AIO | SSD#1: Corsair MP600 1TB | SSD#2: Crucial MX500 2.5" 2TB | Monitor: LG 55" 4k B9 OLED TV

 

RIG#2 CPU: Intel i9 11900k | Motherboard: Z590 AORUS Master | RAM: Corsair Vengeance RGB Pro 32GB DDR4 3600 | GPU: EVGA FTW3 ULTRA  RTX 3090 ti | PSU: EVGA 1300 G+ | Case: Lian Li O11 Dynamic EVO | Cooler: Noctua NH-D15 | SSD#1: SSD#1: Corsair MP600 1TB | SSD#2: Crucial MX300 2.5" 1TB | Monitor: LG 55" 4k B9 OLED TV

 

RIG#3 CPU: Intel i9 10900kf | Motherboard: Z490 AORUS Master | RAM: Corsair Vengeance RGB Pro 32GB DDR4 4000 | GPU: MSI Gaming X Trio 3090 | PSU: EVGA 1000 G+ | Case: Lian Li O11 Dynamic | Cooler: EK 360mm AIO | SSD#1: Crucial P1 1TB | SSD#2: Crucial MX500 2.5" 1TB | Monitor: LG 55" 4k C1 OLED TV

 

RIG#4 CPU: Intel i9 9900k | Motherboard: AORUS Z390 Ultra | RAM: Ripjaws V Series 32GB DDR4 3200 | GPU: EVGA XC3 Ultra 3080 ti  | PSU: EVGA 1000 G+ | Case: Cooler Master H500 | Cooler: Noctua NH-D15 | SSD: Crucial P2 1TB  | SSD#2: Samsung 860 QVO 2TB | Monitor: LG 38" 3840 X 1600 75hz monitor.

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