hi my pc specs are intel g620
gigabyte h61m s2p
4gb ddr 3 ram
gigabyte powerock 500w
sapphire 7770 vapor x
i know its not the best pc but my gpu never reach 99 percent i usaly use 2x msaa my res is 1440x900 i get good frame rates but sometimes iget fps disses and gpu usage drop. usage when i turn off msaa gpu isage is 30 to 40 when 2 msaa from 50 to 60
my cpu usage never reaches 100 always from the mid 80s to mid 90s
You're bound to get lower fps when you increase AA, but this shows us your getting a slight bottleneck from your CPU.
If your framerates are still good, just keep the AA set a little higher to get the most from your system. The other option you have to reduce the chance of a CPU bottleneck is to get a higher resolution screen (ie 1920x1080). This is also another way to force your CPU to pass processing off to the GPU.
No one is saying it shouldn't be at 99%. He didn't get it to 99% until he upped the AA. This forced the processing onto the GPU. This demonstrated a bottleneck with the CPU.
Im curious, wouldn't one want a little overhead or wiggle room in the GPU usage I imagine 75 - 85% GPU usage would be better performance rather than tapped out but i don't know, I would appreciate some insight if you could. For example I play DayZ SA (its an early alpha, buggy game so a terrible barometer) but still; on the main menu afterburner registers my GPU at 99% if that's the case when I boot into game and load in very large cell wouldn't my GPU be suffering?
Core I7 940 2.93 Ghz
ASUS P6T Deluxe
HIS Radeon HD 4870 1gb
Crucial Ballistix 1666 DDR3 RAM