Fps and vram usage

[blakslee720]

Hello everyone,

I've noticed that in some games my vram usage is often under 2.5gb (out of 3 that the card has) yet my fps are below 50, dipping to under 40 during some scenes. What I'm wondering is if there is vram to spare, why aren't my fps higher?

 

System

https://pcpartpicker.com/b/rrnnTW

 

Gameplay

https://www.youtube.com/channel/UCBeMtj66mky0p6ssE93qk3w

 

GPU overclocking done in MSI afterburner

Power limit +20%

Core Clock 1200mhz

Memory clock 1575mhz

[sgtcool]

in which games does this happen?

[C3DMaX]

if there is vram to spare, why aren't my fps higher?

 

 

 

 

because vram is not responsible for fps. (directly)

 

you get stuttering from insufficient vram when something that has to be rendered did not fit in your gpus vram and has to be loaded from slower storage first.

 

all other lag is caused by bad optimisation or too slow cpu/gpu

[Bussinateur]

Your R9 280 is not powerful enough, simple

[blakslee720]

I'm afraid I made a silly error and mixed up some the numbers I was looking at (getting memory clock and usage mixed up)

Memory clock in game is constantly at 1575mhz and depending on what's happening/the game the usage changes. In ACBF it stays under 2g. In crysis 3 it's around 2.1g. In Tomb raider it's around 1.4 and shadows of mordor will push 2.9g

 

I assume that what's happening is the GPU's memory clock isn't fast enough in some cases to use all 3gb that the card has resulting in lower fps? Although it looks like there is vram to spare, the card's processor can't handle any more than it's showing it's using?

[MoonSpot]

Lower your settings.  Your problem isn't vram but that your taxing the GPU to hell with stuff that isn't worth the burden.  a 280 isn't a 290x