DigitalFruitcake

Phew, that makes me feel a bit better, thanks. My i5-6600 is pretty power-efficient too, so that helps. I just recovered my password to my account and was looking through my posts, that's all haha. I didn't remember it either.

You were right, it is running fine, although it still does scare me just a little bit sometimes when I think about the idea of it coming close to the power limit.

Is that 450W capable of holding up an R9 290? Wow! I guess that means my 500W SFX-L PSU can run an i5-6600 @ 53W TDP and an R9 390?

What case is that in the OP? Looks really nice.

Sorry this is mostly off-topic, but is that a custom desk you have made there in your avatar picture? It looks amazing and have been thinking about making something similar myself, any chance you could email me the sketchup model/s?

This does seem very likely. Is this fixable? Is it only an issue with Windows 10 AMD drivers or will clean installing an older OS not help anything either? Quite desperate to solve this problem. If you know anything else I'd love to hear your advice.

Done, here are the results for both of my drives: SSD: http://i.imgur.com/o8FyGuH.png HDD: http://i.imgur.com/WT29GOF.png

Already done this multiple times. ):

46C whilst playing Portal 2 and the stuttering still occurs.

Stuttering still occurs exactly the same on my Intel integrated GPU. Isn't the HD 7950's fault, it seems. Sorry, kinda rushed the post a bit.

I'll literally try my spare R7 260X again now then and report back. I will use Portal 2 to test. I'm in a singleplayer level right now and moving slowly left and right whilst watching the movement of the corners of walls makes it really easy to see how juddery movement appears regardless of my 60fps vsync performance that hits like 400fps when uncapped. I'll be back soon. Thanks everyone for all the help so far.

My RAM is new though, and the issue was the same with my old DDR3 system. The new system has brand-new DDR4 from Kingston in it.

Some are installed there, some are not. Portal 2, and Trove. Both have the issue. Team Fortress 2 and Papo & Yo do not appear to suffer from it, however.

Only issue with that is that I had the same issues with my last system which used a 650W Seasonic Gold PSU and my new one as of a few weeks hasn't helped and is a Silverstone SFX-L Gold.

It seems to be a non-issue in TF2 but in some Portal levels it is definitely present, for example. Also in an open-world MMO called Trove it is a definite issue a lot of the time, but sometimes appears to disappear.