I think I'm currently experiencing a bottleneck issue with my CPU but I'm not entirely sure.. I recently purchased a GeForce G

Solution
A APU is a decent buy so long as your expectations are modest and you have no plans to upgrade.
The integrated graphics is quite good, but once you install a discrete graphics card you have negated much of the value of an apu and are left wit a processor that has slow cores.

Many games depend on the performance of a single master thread. Few can use more than 2-3 threads. Often you will see 50% activity on both cores and think you pave plenty of cpu capability left. This is usually an indication of a cpu limited game that is single threaded. The activity you are seeing is windows alternating activity across available threads.

Games such as strategy, sims, and mmo are in this category.
There are a couple of experiments you can do...

Harry_42

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May 4, 2016
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Apologies, all the info I put in was in the wrong section! My CPU is an AMD A6 3.9 GHZ dual core processor and my GPU is a GeForce GTX 750 Ti with 2gb of VRAM. Whilst playing a low intensity game in single player I only achieved fps of 20-40 which is no improvement on the integrated graphics on the APU. CPU usage can get extremely high on both cores during gameplay but the CPU should be able to take a little more of the load then it currently is.. I just wasn't sure if there were any other factors increasing the CPU usage and taking its load or is it time to upgrade?
 

PeeR_SaBBi

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The TL;DR of it, is that your CPU is a bottleneck. dual cores can't play games too well, my G3258/ r7 250 was a bottle neck, my gtx 950 bottlenecked even more, only getting 70% usage.
Your best bet, depending on the exact CPU support of your motherboard, is to get a quad core at least, or a 6 core if you can. I don't think it was very smart to go with an APU, as they don't have much of an upgrade path. Do you know what socket or exact model the CPU is?
 

Harry_42

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my power supply is a eVGA 430 Watt. My budget is flexible, just trying to keep it relative to the GPU to avoid further bottlenecks in the future. Only trying this out to get some games to a playable condition. The socket on my current motherboard is an FM2. I know that's outdated so i'm more than happy to upgrade that too, any suggestions on what would work well with the GPU and relatively low consumption? Current motherboard is whatever stock with the ASUS M11BB but like I say happy to upgrade the pair
 

PeeR_SaBBi

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May 6, 2015
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Best bet would be an i3 4160 or 4170, but if you can't afford that, a decent upgrade to an FM2 quad core will suffice.
 
A APU is a decent buy so long as your expectations are modest and you have no plans to upgrade.
The integrated graphics is quite good, but once you install a discrete graphics card you have negated much of the value of an apu and are left wit a processor that has slow cores.

Many games depend on the performance of a single master thread. Few can use more than 2-3 threads. Often you will see 50% activity on both cores and think you pave plenty of cpu capability left. This is usually an indication of a cpu limited game that is single threaded. The activity you are seeing is windows alternating activity across available threads.

Games such as strategy, sims, and mmo are in this category.
There are a couple of experiments you can do:

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To help clarify your CPU/GPU options, run these two tests:

a) Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.

b) Limit your cpu, either by reducing the OC, or, in windows power management, limit the maximum cpu% to something like 70%.
Go to control panel/power options/change plan settings/change advanced power settings/processor power management/maximum processor state/
This will simulate what a lack of cpu power will do.
Conversely what a 30% improvement in core speed might do.

You should also experiment with removing one core. You can do this in the windows msconfig boot advanced options option. You will need to reboot for the change to take effect. Set the number of processors to less than you have.
This will tell you how sensitive your games are to the benefits of many cores.

If your FPS drops significantly, it is an indicator that your cpu is the limiting factor, and a cpu upgrade is in order.

It is possible that both tests are positive, indicating that you have a well balanced system, and both cpu and gpu need to be upgraded to get better gaming FPS.
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The passmark rating of a A6-6400 is 2281 and the single thread rating is 1412.
The single thread ratings of most amd processors is in the 1500 range.
By comparison, the passmark rating of the cheapest $60 G4400 skylake processor is 3703 and the single thread rating is 1869.
If you decide to change your cpu, I might suggest a i3-6100 (5500/2102)
You will need a lga1151 motherboard and ddr4 ram.

 
Solution

Harry_42

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May 4, 2016
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I've run the first test you mention and by dropping the grapgics from maximum to minimum there was no noticeable difference in the fps
 

Harry_42

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May 4, 2016
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I have tried a couple of games, online and single player. Anything from steam I've had the fps monitor active to test and even with a few tweaks the fps bounces about on the low end as normal! So I guess a CPU and motherboard change is inbound haha.. bar cpu connectivity, is there anything to watch out for when replacing motherboards and cpu's? I know some new motherboards will run DDR4 ram but anything else to be aware of?
 
Your os is likely oem and tied to the motherboard.
Unless it is retail, you are looking at paying for a new activation code.
MS has been lenient about this, so it couldn't hurt to try.
They mainly want to be assured that you are not a pirate and this copy of windows is used nowhere else.

Because you are changing motherboards, it is possible that you will not be able to boot and might need to do a clean windows install.
 

Harry_42

Commendable
May 4, 2016
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Okay, so no other hardware changes would need to be made? I don't mind doing a clean boot, just have to pick up an activation key to enable it on the new one! Thanks for your help!
 

Lucio_1

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May 4, 2016
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If you´re looking for an upgrade, pick an I5 6600 with a Z170 MOBO and some DDR4 2133 (2x4Gb) of ram, since you´re open for spending some value on an upgrade, there´s a decent one, pick I5 instead of I3 and be confortable for a while