Assassins Creed 3 Full Lag Fix
Written by: devilex94 - 22:06 Feb-25-2013

This is collection of all fix available for fixing Boston Lag in Assassin's Creed 3 (+ my own new fix)

No need to download any software except latest drivers :)

Every Step is Compulsory

 

Step I

Turn Off V-Sync by editing Assassin3.ini (Directory: C:\Users\USER\Documents\Assassin's Creed III)

Change "VSync=1" to "VSync=0" in Assassin3.ini and save it

 

Step II

Only for nVidia users

Open nvidia control panel

Then select "Manage 3D Settings"

Then click on "Program Settings" tab and select "ac3sp.exe" from dropdown box

Select as given below

multi-Display/mixed gpu acceleration - Single Display performance mode

Power Management mode - Prefer Maximum Performance

Threaded Optimisation - Off

 

Note: ATI users can try similar things in their Graphic card control panel

 

Step III

Run Assassins Creed 3 SP then press "Alt + Tab" now open task manager by "Ctrl + Shift + Esc "

For Windows 8: Press the Detail tab

Then Right Click "ac3sp.exe" and set priority as "Realtime" or "High"

and again right click on "ac3sp.exe" and click on "Set affinity" and tick all

For Windows  7: Right Click "ac3sp.exe" and set priority as "Realtime" or "High"

and again right click on "ac3sp.exe" and click on "Set affinity" and tick all

WARNING: Set "ac3sp.exe" priority as "Realtime" only if your cpu is quad core or more

-thanks to tzzsmk

 

DONE!!

I myself got fps boost of 10-15 fps.You may even get more :)

And I am playing at high settings in boston with 40fps.

My Laptop Specs:

*i7 3630QM

*GT 650m DDR3 2GB

*8 GB Ram

$$$$$$$$$$$Enjoy$$$$$$$$$$$$$

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+5 fps for GTX 770 and everything maxed out(AA very high). Thank you.

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EDIT: I followed a tutorial on steam (http://steamcommunity.com/app/208480/discussions/0/792924952708746556) and wrote the post by accident here… It worked better than only giving priority…


I play on everything High except AA to Normal and 2x MSAA in the Control Panel (I get a little boost with this if I'm not imagining). My PC should theoretically do it without problems at stable 60fps…

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It didn't completely fix the lag, but the FPS did increase! :)

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The reason is that AMD users cannot follow the second step. which is the most crucial step

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Boston lag is fixed,thx.But sometimes it's lag at frontier

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Tried it boosted my fps by 5 its something

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I've gained 5-7 FPS. Checked with FRAPS. Thanks :)

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Sadly, not a single frame. I have an HD7850OC, and in Boston it only can produce 20-25 fps. Even low settings gain me nothing but 1-3 fps. The nVidia clearly wins this time.

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Don not set priority to high or realtime, it caused my save to be corrupt………. :(

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Devil, what did you mean by WARNING: Set "ac3sp.exe" priority as "Realtime" only if your cpu is quad core or more
-thanks to tzzsmk
then i cant try this solution, right? and what will happen if i do?

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windows won't allow you to set the exe at realtime priority . you can only set it to "high"
other things are similar for everyone

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Ah, then i will try high and hope it will work well. Anyway, i'm still playing AC2 and it's extremely poorly optimized, i was depressed, Can i try this solution on AC2 ( i mean the priority in task manager only)?

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yeah it will work in every SOFTWARE AND GAMES

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Thanks, i hope this will make a difference ^^

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