I'm getting the same problem, Kirby. People have hinted that it is my AMD processor but I'm not 100% sure if that's the problem. I'd love an answer for this.

I think it has to do with how much is going on ingame. I find i get like 300+ fps on jump_beef where the map is all brown and there isnt too many other players in game. On the flipside, When im playing a badlands middle in a scrim, my fps drop's do around 80-100 because there is a lot more stuff happening. I may be wrong about that but the same goes for your respawn room issue.

Yeah, it's really really frustrating. It's hard to focus at times when your game feels choppy because of the fps drop that will hit you out of nowhere.

I have the same processor as you and my fps changes depending on what I'm doing. It usually doesn't change depending on my location in a map though.

TF2 doesn't utilize multicore well. Along with the game having poor optimization I'm slowly getting less and less FPS in this game, to the point where maps like cp_obsure I get 80fps max. Playing the new koth_lakeside in a full pub gives me between 10-30fps depending on what is going on.

If investing in a better CPU isn't an option at the moment, you should try minimizing CPU usage in other areas. The mat_viewportscale is ultimately for people limited by their GPU and that obviously isn't the case for you. You can try disabling all non-microsoft services and startup through MSconfig to get a bit of a boost. Defrag TF2 and your drive, check for errors in TF2 and any compatibility issues that might be bogging down your system.

If you find any secret cfg option or something that fixes this problem for you, please share it with me. But I think the only real "fix" is a different CPU :/

Consider using fps_max. I would get 600+ and with intense fights or walking through a cloud (medic taunt) would drop me below 100. With the cap, the frame rate drop is much less and the game feels smoother to me.

The rule of thumb that I use is double your refresh rate plus one for fps_max.

Purchasing parts is far from an option any time in the foreseeable future. I disable every non-microsoft service/program on the exception of Steam and Mumble. No difference in FPS consistency that I can notice. I very recently defragged TF2 (last major update before Halloween? maybe just the last 2-3 updates before Halloween). I might need to defrag my drive, since it's honestly be a long time. How would I check for TF2 errors and compatibility issues?

I don't know how a different CPU would help, but I'm not very tech smart, other than what is just generally good. Should I disable multicore rendering and see if that would help?

I forgot to mention mat_filtertextures is enabled.

Disabling shit won't help, because TF2 is only using 1/6 of your CPU anyways (1 core). You could be rendering shit in Cinema4D, and as long as you limited those processes to 5 cores, your tf2 would run the same.

It is your CPU that's causing these problems, and I know this because I have the same CPU. Unfortunately, the X6's don't OC that well (Mine started crying past 4.3), and you don't want to keep them above 3.8ghz for very long since they run so hot at 125w.

A 2500k would solve all of your problems.

My core speed is generally around 3100MHz (not sure if this is what you meant??). Is this default, or higher than it should be? But yeah, I literally cannot buy a new CPU if I wanted to.

Which X6 do you have?

I have a 1090T clocked at higher speeds than the 1100T, and I still have framerate issues.

1050t

TF2 uses much more than just 1 core. All 4 of my cores are fully loaded. Learn how to overclock your CPU. Other than that you're mostly out of luck.

Having to OC just to play TF2 without inconsistent FPS is unacceptable.

does your cpu run at 100mhz?

TF2, mumble, steam, and chrome never are using more than 3 cores at once for me.

I have never noticed any difference playing TF2 at my default speed with my i5 2500k (3.3) or playing when set it to 4.96

found the problem

nice performance per dollar for video rendering and other tasks that fully use the 6 cores, not so much for gaming

I had really hoped I wasn't right. Welp, time for a new processor.

I half bought my computer for video rendering and such things, and half for gaming.

what is your 'mat_queue_mode' set to? if it's not -1, try that and see how it performs

It's -1. That's for multicore rendering, and earlier I asked if I should have that disabled.