Replacement for broken Radeon HD5770

[Wideeree]

Hey,
I need a replacement for my broken Saphire Radeon HD5770. My multi monitor setup is 3 times 1680 x 1050 - via DVI and VGA. Can you recommend a cheap graphic card with triple monitor support, which has same or more power than my old one? Support for four monitors would be even nicer but I don't want to invest too much money for this pc anymore (as it will just be my second/assistant-pc soon).

My pc:
i5 @ 2,67 GHZ
8 GB DDR 3 RAM
ASUS P 7F-MWS Mainboard
OS: Multiboot setup


So far these cards don't look bad for me. But do they really support three monitors in 1680 x 1050?:

Sapphire Radeon HD 6450 2GB DDR3 PCIe Grafikkarte DVI/HDMI/VGA LiteRetail
https://www.cyberport.de/pc-und-zubehoer/komponenten/grafikkarten/sapphire-technologies/pdp/2e01-79q/sapphire-radeon-hd-6450-2gb-ddr3-pcie-grafikkarte-dvi-hdmi-vga-literetail.html

MSI GeForce GT 730 2GB DDR3 DVI/VGA/HDMI passiv, Low Profile, Grafikkarte
https://www.cyberport.de/pc-und-zubehoer/komponenten/grafikkarten/msi/pdp/2e12-3ch/msi-geforce-gt-730-2gb-ddr3-dvi-vga-hdmi-passiv-low-profile-grafikkarte.html

Asus GeForce GT 730-2GD5-BRK 2GB GDDR5 PCIe Grafikkarte DVI/HDMI/VGA LowProfile
https://www.cyberport.de/pc-und-zubehoer/komponenten/grafikkarten/asus/pdp/2e07-38g/asus-geforce-gt-730-2gd5-brk-2gb-gddr5-pcie-grafikkarte-dvi-hdmi-vga-lowprofile.html


thank you in advance