What power supply will work?

Will this Power Supply and Video Card Work Together No Problems?

• I have a Ultra X2 Connect 550 Watt Power Supply http://www.ultraproducts.com/product_details.php?cPath=61&pPath=407&productID=420 And wanting to get a SAPPHIRE Toxic 100269TXSR Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Video Card. http://www.newegg.com/Product/Product.aspx?Item=N82E16814102840 My question is this will this video card work with my power supply no problems cause the Ultra people said it will not cause I don't have the 8Pin PCI-E connection on this Power Supply. Well if you look at the picture it does have a 8Pin something, but it says it is for a EPS Motherboard, but the cable looks like it would work on the video card. Yes I know the video card comes with the cables and stuff already, but I want to avoid using them and use what came with my Power Supply can I do this? And what is EPS? 10 points to the first person with a good answer to all this.

• Answer:

  The HD 4890 has a peak power consumption of 190 watts or almost 16 amps on +12V1 rail of power supply. http://www.guru3d.com/article/sapphire-toxic-hd-4890-vaporx-review/2 +12V1 of that PSU is just rated at 17 amps. Fans and drive motors of HDD and CD/DVD drive also draw power from that rail. PC may boot to desktop since card draws much less in 2D mode BUT could go black screen once you open a game. +12V2 is mainly for the processor and supplies it through the 12V EPS (8-pin) and the 12V ATX 4-pin connector. Some PSUs just use a 4+4 12V connector that works on 4-pin or 8-pin motherboards. The 12V EPS power connector to motherboard is mainly for motherboards requiring it because of the high current requirement of 125-130W processors. Processors that draw 90W or less could get by with the 4-pin 12V ATX connector. That power supply specifically states that the 8-pin connector is for motherboard and not for PCIe power connection. Attempting to use it on the card and the 4-pin 12V ATX connected to motherboard could overload the +12V2 rail of power supply. PSU will just go into auto-shutdown to prevent damage. Better consider a power supply with stronger +12V rails and w/ at least a 6+2 pin PCIe power connector.