Bottlenecking

[Guest]

17 hours ago, SpaceGhostC2C said:

Yes, but how is that going to generate a bottleneck? If the GPU doesn't 100% usage to deliver, then it won't run at 100%, no matter the CPU.

 

A higher resolution doesn't need to translate into lower FPS. I don't see a reason why, for example, a GTX 1080 would deliver lower FPS going from 24op to 480p (extreme example).

Also, why would CPU load fall?

 

I can understand that, if the GPU is struggling by itself, then how fast your CPU runs is less of an issue. That doesn't make any CPU better per se, it just means that you need a stronger GPU before even noticing that your CPU isn't particularly fast - i.e., the game simply doesn't require much on the CPU side.

This is just wrong. 

 

Raising the resolution puts nearly all the additional strain on the GPU. You might be taxing the CPU a bit more increasing from 1080p to 1440p in certain titles which are notorious for being CPU bound, but overall the additional strain will be put on the GPU. 

[SpaceGhostC2C]

1 minute ago, Alexokan said:

This is just wrong. 

 

Raising the resolution puts nearly all the additional strain on the GPU. You might be taxing the CPU a bit more increasing from 1080p to 1440p in certain titles which are notorious for being CPU bound, but overall the additional strain will be put on the GPU. 

We agree on that. What I disagreed with is the idea that lowering the resolution will make the GPU "bottlenecked" by the CPU - it will just make life overall easier for your system.

[Guest]

3 minutes ago, SpaceGhostC2C said:

We agree on that. What I disagreed with is the idea that lowering the resolution will make the GPU "bottlenecked" by the CPU - it will just make life overall easier for your system.

Oh, sorry.

 

Yes, you will just have overhead for both. I saw this argument brought up in another "Will my i5 bottleneck my 1070", thought it was fairly silly. 

[i_build_nanosuits]

these threads are hilarious

[squirrl]

From what I've experienced, you can simplify a bottleneck test by following this pattern:

 

Given X system, what is the result Y when running test Z?

Change variable A in system X to a greater value

is Y a better result?

Yes, the result is better - go back to the original setup and change something else

No, the result is the same - A is a bottleneck.

 

 

[mrchow19910319]

15 hours ago, Crusader93 said:

Smart choice ;P

I have noticed that even the 6700K can run 100% load with a 1080 in some(very few) areas in certain games with everything cranked up. That makes me a little nervous that maybe intel soon will have problems producing cpu's that does not bottleneck when we get 1080Ti cards and so on

 

[Crusader93]

18 hours ago, Dearouge said:

Hi everyone!

I would just like to ask you for your opinion on upgrading AMD CPU in AM3+. I currently have AMD Phenom II x6 1100T BE + Sapphire r9 380x nitro on this motherboard: GA-990FXA-UD3. http://www.gigabyte.com/products/product-page.aspx?pid=3894 - the CPU is real bottleneck of the system now. So I would like to upgrade to to Vishera FX-8320E (low tdp, low price and probably good performance for gaming like FPS, racing, GTAV, GW2..???) and I hope that it won't bottleneck the GPU anymore. So is that correct assumption??

 

So is the upgrade worth it and will solve my issue or should I just go and buy new motherboard + cpu (and possibly switch to intel??). I would prefer to buy just the CPU - but feel free to suggest anything different!

 

Thanks for any reply.

Just for sake of good: I have 16 GB of 1600Mhz DDR3 ram

Upgrading from AMD to AMD is nonsense. All AMD CPU's bottlenecks all the modern graphics cards, because of their extremely poor single core performance compared to intel. If you are going to upgrade CPU, you should pick intel. Going AMD again will only make you encounter a wild bottleneck. Throwing a harddrive on it catching it, wont remove the problem. 

If you make it evolve to an intel core i7 6700K however, you have one serious gaming CPU right there. (Pokemon reference, since its so damn hyped these days).

[Crusader93]

A bottleneck is simply one component holding another component back, because it lacks the power or speed to keep up.

 

A GPU is supposed to work at 99% at all times to pump out all the frames it possibly can(without some exceptions, as csgo and league of legends type of games. With high end graphics cards, you will usually see around 30% performance, when you have 300-500fps :P)

 

In graphic heavy games, such as Witcher 3, the GPU is supposed to work at 99% at all times. If it doesnt, there is something holding it back, witch(you see what i did there?) in 99% of the cases is the CPU.

The CPU is like: "Hey, there is a wild pikachu here, i gotta catch it before it runs away".

GPU: "Let the fckin Pikachu go, i need your help up here!"

CPU: "Fck you man, ima gonna catch this pikachu!"

GPU: "SEND ME THE FCKIN FRAMES!"

CPU: "I will be a pokemon master!"

GPU: ".............."

 

The GPU then needs to wait for the CPU to catch up, redusing the frames its able to give, because the CPU does not render them fast enough and sending them to the GPU. This is usually shown with the GPU's performance % going down, along with the CPU's Performance % going up.

The most alarming is when you see your CPU at 100% load, while the GPU is below 90%. Then you have a serious pokemon trainer CPU that wants to catch pokemon instead of giving you frames.

[Dearouge]

44 minutes ago, Crusader93 said:

Upgrading from AMD to AMD is nonsense. All AMD CPU's bottlenecks all the modern graphics cards, because of their extremely poor single core performance compared to intel. If you are going to upgrade CPU, you should pick intel. Going AMD again will only make you encounter a wild bottleneck. Throwing a harddrive on it catching it, wont remove the problem. 

If you make it evolve to an intel core i7 6700K however, you have one serious gaming CPU right there. (Pokemon reference, since its so damn hyped these days).

Thanks for the comment. I had this kind of feeling as well. On the other hand switching to intel is a bit more expensive than I would like currently. Will see, thanks!