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FRAPS - why does FPS drop?

I

icor1031

[H]ard|Gawd
Joined
May 29, 2010
Messages
1,295
Amount of RAM? Will 8gB instead of 4gB make a big impact?
HDD Write speed? Will RAID 0 make a big impact?
CPU Performance? Will having an i5 750 instead of a 720 Heka make a big impact?
 
FPS will always drop when more action and objects are drawn on screen. With more powerful hardware, you can not notice them, but post your CPU and graphics card first.
 
A friend of mine has a similar system build, but with an SSD. He saw a slight FPS improvement while recording on his SSD. I'm using regular hdds on Raid 0.

I say it comes down to your hard drive speed and your cpu/gpu strength. Don't think recording is going to effect your ram all that much.
 
icor1031 said:
I'm asking the reason FRAPS makes it drop.
Click to expand...

Because it's adding additional over head, both in terms of CPU and GPU. It has to analyze the game's framerate and then render the number in the overlay, which doesn't come free.
 
im confused, the op is questioning why running an additional program on his system would lower his framerates?
 
Why does my car go slower when it's full of people!? :rolleyes:
 
Guys, guys! I know it's going to decrease. What I don't understand is where the chief strain(s) come from. CPU? Is FRAPS multi-threaded? HDD? Is it because of working the hard disk so hard? GPU? Does it put a strain on the GPU? Much?
 
It's not very difficult to understand. When you use FRAPS to just display the FPS, the program has to send, receive, and interpret calls between the game and driver to determine what framerate it's running at. And it does this extremely fast, updating a dozen(if not more) times a second. Then it has to render that number in a 2D overlay which also requires system resources. When you use FRAPs to record video, the hit is much bigger because it has to encode the video stream and then save it to a hard drive.

The HDD will be the biggest bottleneck, but the load on the CPU with all the driver calls is not insignificant.
 
fraps is cpu dependant and is not multithreaded at least about a year ago when i was using it alot, i recall it would peg one core to %100.


write the save to a physical different drive for for sure, set your cpu affinity to lock fraps to one core and your game to the other cores.
 
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