wlan0 / wifi not working with the maximal traffic

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https://bbs.archlinux.org – My wifi is working but the connection allows more traffic as i can reach currently with my arch.With other OS ( ubuntu, win7 ) i can reach that maximum.What are the factors that influences this traffic maximum?Only the underlying driver for the hardware?lspci #listing hardware interfaces 04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)pacman -Qs rtl #search for currently installed driver local/rtl8192 0005.1230.2011-2 Driver for Realtek 8192CE/DE/SE PCI wireless chipsets.This is the driver I use now.I've got a Thinkpad x120e. (HowTos)