new computer not running like it should

[Hogan_]

i just upgraded my cpu from a a10 6700 apu and a gtx 750ti 1gb to a fx6300 and a 750ti 1g
i also put in a new motherboard
but when i played games like h1z1 my old system performs about the same as my new one did i not update something or is my graphics card to slow or what???

specs
gtx 750 ti 1gb
fx 6300
biostar ta970 mobo
apevia 450w psu
12g of ram

 

[Aeacus]

Since you have the same GPU and you only did gain slight processing performance from your CPU upgrade,
comparison: http://cpu.userbenchmark.com/Compare/AMD-A10-6700-APU-vs-AMD-FX-6300/2938vs1555
there is no gain in gaming performance due to the CPU upgrade.

For a gain in gaming, upgrade your GPU. Here i suggest GTX 1050 Ti,
comparison: http://gpu.userbenchmark.com/Compare/Nvidia-GTX-750-Ti-vs-Nvidia-GTX-1050-Ti/2187vs3649
pcpp: http://pcpartpicker.com/product/wrmxFT/evga-geforce-gtx-1050-ti-4gb-acx-20-video-card-04g-p4-6251-kr

Also, do replace your PSU ASAP! All Apevia PSUs are terrible quality (Tier five) PSUs.

Tier five
Avoid IMMEDIATELY. These units are highly unsafe to use. No such protections added, very thin gauge wiring used, false advertising and too much to list. Reference to a higher tiered unit for a better, money saving and a much safer unit. For your safety's sake, please don't order or pick one up for use in your system. These units are a potential fire hazard and could even kill you, let alone your system.

PSU Tier list: http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

For a new PSU, anything from Seasonic will do, in 400W range.
Here i suggest going for S12II-430 or G-450 (both PSUs are good quality (Tier two) units),
pcpp: http://pcpartpicker.com/products/compare/4Vzv6h,xVkD4D/

S12II series is 80+ Bronze and fully wired white G series is 80+ Gold and semi-modular.