Recently I upgraded a laptop I had been using to play minecraft to a better cpu and gpu than what it currently had. After I finished and booted up my computer and made sure everything was up to date, I attempted to play some minecraft to try out the new cpu and gpu, only to find that after a bit of playing the fps would drop from being a stable 38-40fps to 5-9 fps. I attempted to diagnose the problem and tried the following:
-Increasing minecraft's memory with little success getting the number to change.
-Updating Lwjglu
-Re-downloading minecraft
-Re-installing java
but the problems remains still. I had this issue occur across 3 different version of minecraft, modded 1.4.7, modded 1.2.5, and 1.5 vanilla.
My original computer specs that reliably got 25-30 fps with optifine plus mods on normal distance and most effects on:
-Intel inspirion 1520 laptop with:
-Intel Core Duo T7250 2.00ghz processor
-Nvidia Geforce 8400m GS 128mb graphics card
-2 gigs DDR2 SDRAM
Versus the new pieces' specs:
-Intel Core Duo T8300 2.40ghz processor
-Nvidia Geforce 8600m GT 256mb graphics card
It's odd that the fps will run high, in the 50-60s range reliable, sometimes the 70s or even higher, then it drags down to 10-15 fps or lower. Eventually I thought it involved minecraft using less memory, thus having too much and it often kicking the amount down that was in use at the time as the cause of the problem, but close watch revealed it happened no matter how much memory was in use.
The only correlation is the fan becoming active to draw heat from the gpu to the fps drop. I took my time installing the new components and used new thermal paste on the cpu's heatsink so I am at a quandary as to what the problem is. Before this minecraft would slowly build up the amount of memory it would use to roughly a gig of ram and the thermal paste tube is a little old (2 years) if that helps at all.
Adding an update, I've monitored the heat of the video card and cpu during the fps slow down. The graphics card only ever heated up to 58 degrees celcius and the cpu reached 62 degrees so it's even more puzzling. A few details I forgot to mention in the first post is that during the first reboot the computer didn't detect and use the new graphics card, but worked fine with the exception of windows aero for vista being disabled and unlisted and I had to preform a hard disk error repair.
Another update, after exhausting most of the tricks I could find I made the decision to swap cards back to my old one only to find to my horror that the problem is now persisting with a card I've known that works better. Now I definitely need a solution to my problem and I'm just about out of ideas, the only thing left is that somehow I disabled the shared system memory for the graphic cards in general and that's why the fps is good when the demand is low, but dies when the demand increases.
Images of before and after showing the lag meter via an older mutlimc instance:
Before:
After:
These 2 screenshots were taken only seconds apart.
-Increasing minecraft's memory with little success getting the number to change.
-Updating Lwjglu
-Re-downloading minecraft
-Re-installing java
but the problems remains still. I had this issue occur across 3 different version of minecraft, modded 1.4.7, modded 1.2.5, and 1.5 vanilla.
My original computer specs that reliably got 25-30 fps with optifine plus mods on normal distance and most effects on:
-Intel inspirion 1520 laptop with:
-Intel Core Duo T7250 2.00ghz processor
-Nvidia Geforce 8400m GS 128mb graphics card
-2 gigs DDR2 SDRAM
Versus the new pieces' specs:
-Intel Core Duo T8300 2.40ghz processor
-Nvidia Geforce 8600m GT 256mb graphics card
It's odd that the fps will run high, in the 50-60s range reliable, sometimes the 70s or even higher, then it drags down to 10-15 fps or lower. Eventually I thought it involved minecraft using less memory, thus having too much and it often kicking the amount down that was in use at the time as the cause of the problem, but close watch revealed it happened no matter how much memory was in use.
The only correlation is the fan becoming active to draw heat from the gpu to the fps drop. I took my time installing the new components and used new thermal paste on the cpu's heatsink so I am at a quandary as to what the problem is. Before this minecraft would slowly build up the amount of memory it would use to roughly a gig of ram and the thermal paste tube is a little old (2 years) if that helps at all.
Images of before and after showing the lag meter via an older mutlimc instance:
Before:
After:
These 2 screenshots were taken only seconds apart.