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GTX660 +GT620 losing preformance?

Last response: in Graphics & Displays
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January 18, 2014 7:55:45 PM

Hey, everyone here's some background.

i bought my EVGA GTX 660 2GB SC to replace my old EVGA GT620 1GB. the old 620 was just collected dust for a few months. recently i read up on dedicating old GPU's to physX to help take a load off of the more powerful GPU. i also read that if the secondary GPU, i.e. my gt 620, was weak it could actually slow down and bottleneck the performance of the system.

the most graphically demanding game i have is Battlefield 4 and with the GT 620 installed, i have TERRIBLE TERRIBLE stuttering and framerate loss. i did configure the 620 to be dedicated to PhysX and saw no difference in performance until i REMOVED the GT620 out of my rig.

so my questions are, whats the reason for this?
can i get round this?
can i just use the memory from my 620 to play my games, or am i best off leaving it out of my system?

system specs

Gigabyte 990FXA-UD3 (REV 4.o)
FX6300 black edition @stock speed
8GB of PNY DDR3 @ 1333 MHz
EVGA GTX 660 SC
January 18, 2014 8:01:49 PM

just leave it out. Keeping it in with a new card will make things messy and complicated. using an old card to do physx is never a good idea as the new fast card still has to sync with this old piece of crap card and it causes issues.
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January 18, 2014 8:34:00 PM

woltej1 said:
just leave it out. Keeping it in with a new card will make things messy and complicated. using an old card to do physx is never a good idea as the new fast card still has to sync with this old piece of crap card and it causes issues.


doesn't answer my question, but okay i figured i should do that anyway
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January 18, 2014 9:03:31 PM

This is the funny thing about dedicated PhysX Cards. You can actually loose performance using a low end card to do PhysX processing. The rest of your system is having to wait for that card to finish before it can progress, and in turn, you loose frames.

I would remove it. Its best to only use X50/60 Cards for PhysX

Edit- Ill be honest and say I dont have the most experience with Dedicated PhysX Cards, But from the little bit of testing ive done, this seems to hold true. BF4 doesnt need the 620, and even PhysX enabled games will be slowed down by it....

The BF4 problem could be engine related. With as many issues as that game has, Yeaaah...
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January 18, 2014 9:17:47 PM

your better off selling the gt 620 or putting it to use in another computer as it's become obsolete in terms of gaming performance.
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