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Hp z400 inte xeon W3550 quad core 475W power supply

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hp z400 Wokstation
Microsoft Windows 10 (64-bit)

Hi all, 


I have a workstation hp z400 with Intel Xeon quad core W3550 3.1 ghz. I have try to change the graphic card but something doesent work. I try to install a MSI GeForce 560TI twin frozr II 1GDDR5/256bit, but when i try to power on the Workstation, it start to beet (6 beeps, which mean is a problem with my graphic card)

I saw on this forum that some people use geforce GTX670 with 2GDDR5/256bits and work fine, with no problem ( ) . 

Why mine does not work? is that BIOS issue? i have a recent verions (2016) but still cannot use my video card. 
PLease, someone, maybe i do something wrong. All my hopes ar in this video card. I cannot afford to buy a new one (My old graphic card was a Nvidia Quatro 256mb/128bit

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seems like power issue

card needs 2x 6pin power ? , but z400 got only one cable with 6 pin, buy a SATA to 6 pin power VGA adaptor, or 6 pin to dual 6 pin adaptor and make sure card is powered correctly

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