Which SEUS version are you using? If it's the most recent, try rolling back. SEUS are notoriously unoptimized, particularly newer versions. Alternatively, try lighter weight shaders, such as chocopic13s or KUDA. They should give decent performance on most systems.
From the screenshots, it looks like you are running SEUS v11. This is a very heavy shader, especially with the volumetric clouds on. Now those can definitely eat some FPS. Along with that, Global Illumination is enabled. Also, a very heavy shader effect. If you don't know, on each shader, there is a shader options tab when a shader is running. Optimize those settings, and you should be good to go. I definitely recommend optimizing or disabling the volumetric clouds and Global Illumination. If you have "HQ Volumetric Clouds" enabled, disable them. Mess around with the settings a bit, should help.
I wouldn't call a machine with a GTX 970 a super PC. I'm pretty sure even the Titan X Pascal has issues with heavy shaders. Have you tried another shaderpack?
So basically, the mods + HQ Volumetric Clouds + Volumetric Clouds + Crepuscular Rays + Global Illumination = lag. I have a GTX 1060 and the Extreme preset on OptiFine settings bring me down to about 50fps, so the mods might be causing you trouble. Also, consider lowering your RAM allocation to Minecraft. If you are playing with Modpacks and shaders, I personally recommend 4GB.
Okay so i have a REALLY good pc
I7 5930k 12 cores (6 but hypertreading)
2 x gtx 970
32 GB DDR4 Ram 16 allocated to minecraft
However i'm playing a modpack called mordern harmony I get around 550 FPS stable with all settings on fancy/Highest
If i turn on Seus shaders i drop to Around 5
I simply don't believe that a pc like mine can't handle shaders
2 images show the difference,
What am i doing wrong
Don't allocate 50% of your total RAM to Minecraft. Allocate a maximum of 40%, the rest will be needed by other processes and Windows.
No it won't unless you have 6GB or less
My PC uses around 4 GB of ram on idle meaning i could allocate 24 GB without any problems
Bumb
Without mods and 4 GB of ram on normal minecraft NOT MODDED i get around 1400 FPS no shaders and again around 5 with shaders
These are my JVM Arguments
16 GB
-Xmx16G -Xms16G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy
-client -d64
4 GB
-Xmx4G -Xms4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy
-client -d64
The change of ram has minor effects on fps 16GB gives maybe 100 FPS extra on normal unmodded Minecraft Without shaders and nothing with shaders.
I just far +32 bur changing this to the lowest possible has NO fps effect at all both on modded or unmodded
Bump
Don't bump. This is a forum, not online chatrooms.
Which SEUS version are you using? If it's the most recent, try rolling back. SEUS are notoriously unoptimized, particularly newer versions. Alternatively, try lighter weight shaders, such as chocopic13s or KUDA. They should give decent performance on most systems.
From the screenshots, it looks like you are running SEUS v11. This is a very heavy shader, especially with the volumetric clouds on. Now those can definitely eat some FPS. Along with that, Global Illumination is enabled. Also, a very heavy shader effect. If you don't know, on each shader, there is a shader options tab when a shader is running. Optimize those settings, and you should be good to go. I definitely recommend optimizing or disabling the volumetric clouds and Global Illumination. If you have "HQ Volumetric Clouds" enabled, disable them. Mess around with the settings a bit, should help.
I wouldn't call a machine with a GTX 970 a super PC. I'm pretty sure even the Titan X Pascal has issues with heavy shaders. Have you tried another shaderpack?
.............mcf isnt gone???????????????
So basically, the mods + HQ Volumetric Clouds + Volumetric Clouds + Crepuscular Rays + Global Illumination = lag. I have a GTX 1060 and the Extreme preset on OptiFine settings bring me down to about 50fps, so the mods might be causing you trouble. Also, consider lowering your RAM allocation to Minecraft. If you are playing with Modpacks and shaders, I personally recommend 4GB.