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G3258 @ 4.0GHz bottlenecking GTX750Ti SC in certain games?

post #1 of 18
Thread Starter 
Could my G3258 @ 4.0GHz be bottlenecking my GTX750Ti SC in certain games?

I was under the assumption that a G3258 overclocked would be more than enough for a GTX750Ti, and could even do well with a GTX950 – up to a GTX960 before hitting significant bottlenecks. Hell, there's a crazy guy here (TopicClocker) testing the G3258 with a GTX970. tongue.gif

However, I was playing a steam fps shooter called Insurgency the other day, with HWmonitor, GPU-Z, and task manager running. My CPU was running at 95-100%, but my GPU was only running at 70-80%. My settings are 1080p, with most settings maxed, a few settings on medium, and AA at 2x or 4x. I have vertical sync turned on as well.


I’m also wondering if high CPU utilization could cause wireless keyboard/mouse lag? See this thread:
http://www.overclock.net/t/1590817/does-high-cpu-utilization-cause-wireless-keyboard-mouse-lag


Specs: G3258 overclocked to 4.0GHz, 8GB DDR3 RAM, 256GB Samsung SSD, GTX750Ti, Antec 380 green earthwatt PSU, Windows 7. Dell K636 wireless mouse + keyboard combo (originally running with Logitech MK270, mk320s wireless keyboard/mouse but they were lagging horribly)

Any help for either issue would be appreciated!
Edited by Bluescreendeath - 2/10/16 at 8:31am
post #2 of 18
I was also wondering the same thing, thanks for bringing this to everyone's attention.
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post #3 of 18
Yes. Completely possible.
There are lot of games where you'll be bottlenecked by your CPU. GTA V, BF4, Arma etc.
You often hear you there's no CPU bottleneck because of a slow GPU, but the thing is, once you lower some settings like 32x AA paired with 4k DSR, and start targeting 60fps, you'll notice the bottleneck.
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post #4 of 18
I find that the G3258 and 750 Ti are a very good match for each other in terms of performance in most situations. However, in many cases, especially in CPU intensive games, you will see the G3258 being the "lowest common denominator" bottlenecking performance in many situations, especially with a mild overclock like yours. You have plenty of RAM and a pretty speedy SSD in your build, so I'd say its safe to say that the G3258 will in many situations end up being the part of your PC that holds the rest back, especially as we start having games and programs released that start to take full advantage of 4 and 8 core processors. I do think, however, that you could get a little bit of that performance back with a bit higher overclock, especially considering many games released in the past few years have been more GPU-heavy than CPU-heavy. Most early G3258s can hit 4.7GHz without breaking a sweat, and while I got one of the later manufacture G3258s that don't overclock as well, I was still able to fairly easily hit a stable 4.4GHz overclock. It's also possible that there might be some settings in game that use more CPU and GPU and checking on that might be worthwhile.

As far as high CPU usage causing mouse/keyboard lag, I haven't ever had any such issues using a G3258 (that does max out at 95-100% CPU usage in some games) with a Logitech wireless mouse, so your problem is likely related to your mouse/keyboard as opposed to something with the rest of your build.
post #5 of 18
Thread Starter 
So what is the highest tier gpu you'd recommend for the g3258 at stock 3.2ghz, 4.0, or 4.4? Gtx750ti? Gtx950? Gtx960?
post #6 of 18
Quote:
Originally Posted by Bluescreendeath View Post

So what is the highest tier gpu you'd recommend for the g3258 at stock 3.2ghz, 4.0, or 4.4? Gtx750ti? Gtx950? Gtx960?

It depends on a lot of factors, what res and settings you are playing at, and of course what games.

I personally use a G3258 with a 7970 for 1080p gaming and they seem to be pretty well matched for games such as CSGO, but as you say its bottle necking his 750Ti, it all depends on the situation
post #7 of 18
750Ti if you play games that might be CPU intensive. 950 + i3/i5 would be smarter.
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post #8 of 18
Thread Starter 
Quote:
Originally Posted by Smanci View Post

750Ti if you play games that might be CPU intensive. 950 + i3/i5 would be smarter.

I got the G3258 to overclock so I can run Dolphin emulation. Unfortunately, the i3/i5 non-K versions would be a downgrade for emulation.
post #9 of 18
I would guess 4.0Ghz is enough for that game. The minimum requirements are a 1.8ghz core2duo lol. So the next thing is what if any mods are you doing on the game? Things you can do is test overclocking the gpu memory see if that helps also check and see how much vram is being used. I have never run this game but lack of system memory can cause lag as well.

One other thing you could do is speed up your system memory and see if it helps any. When i was using a i3 @ 4.2 one of the first one's that you could overclock with increasing the pci-e bus made a huge difference in gta4 like stupid amounts.

But i dont think you can do much of anything with your pci-e bus now on that chip. One thing to keep in mind is that game also might not be optimized very well and nothing you can do will help is a possibility. Altho never hurts to try things out. Also more cores never hurts and more memory never hurts either so keep that in mind when watching your vram and pagefile usage. Sorry a bit tired here not sure if everything came out strait or not lol. Just spend some time changing and testing different things find out what helps and what does not. Best of luck dont forget to keep us up to date smile.gif
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post #10 of 18
Thread Starter 
Quote:
Originally Posted by Formula383 View Post

I would guess 4.0Ghz is enough for that game. The minimum requirements are a 1.8ghz core2duo lol. So the next thing is what if any mods are you doing on the game? Things you can do is test overclocking the gpu memory see if that helps also check and see how much vram is being used. I have never run this game but lack of system memory can cause lag as well.

One other thing you could do is speed up your system memory and see if it helps any. When i was using a i3 @ 4.2 one of the first one's that you could overclock with increasing the pci-e bus made a huge difference in gta4 like stupid amounts.

But i dont think you can do much of anything with your pci-e bus now on that chip. One thing to keep in mind is that game also might not be optimized very well and nothing you can do will help is a possibility. Altho never hurts to try things out. Also more cores never hurts and more memory never hurts either so keep that in mind when watching your vram and pagefile usage. Sorry a bit tired here not sure if everything came out strait or not lol. Just spend some time changing and testing different things find out what helps and what does not. Best of luck dont forget to keep us up to date smile.gif

No mods.

There should be no lack of memory issues - I have 8 GB of DDR3 1600MHz RAM, which downclocks to 1333MHz with the G3258. I don't go over 5GB with the game + many chrome browsers + antivirus + GPUZ/HWmonitor/CPUZ running in the background

My problem isn't with the GPU - it's with the CPU. I don't know why I'm running at 100% cpu power while my GPU is around 70-80%. The GTX750Ti is roughly equal to a 7850, so it's really not that powerful - there should be no reason why the PCIe bus is over saturated.

Maybe the game is not well optimized as you say...but then again, if it only requires a lowly 1.8Ghz Core2...

I'm going to try overclocking it a bit more and running more games + benchmarks to see if other applications run into this issue as well.
Edited by Bluescreendeath - 2/10/16 at 1:32pm
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