Hi I was wondering if I can purchase and use a MSI R9 380 GAMING 4G for my new Dell XpS 8900 computer? I am concerned about the stock psu not being enough power for this card. I belive the stock psu is 460w but this card has a System Requirements Power Consumption of 150W.
And this is the card I would like to use:
The stock 460w is designed for 150w of video power. That card uses 225w or more. 8 Pin = 150w + 75w from the X16 slot = 225w if it uses a 6 pin and An 8 pin this is 300w
AMD says that 6950 cards can be used with an AX650M
I have used the Corsair CS750M in several Dell models without issue.
Ok so It would be ok If I get this card then right with my stock PSU? Because it would be 225w = from the psu and pcie 3.0 X16 slot It uses two 6 pin connectors that I have inside that aren't used because I have a Nvidia Gt 730 2GB
The cards I have seen show 1 8 pin and 1 6 pin. There are Dual 6 pin to 8 pin adapters aka its 300W aka 3 X 6 pin or 1 8 pin and 1 6 pin. Stock 460 is too small.
So before I think about upgrading my psu in the future what is the best graphics card I can use with this stock psu that will give me a good gamin performance? Plus I seen videos of a guy using a nvidia GTX 970 with the stock psu etc....
GTX 970 can work with the stock PSU, but I've read of failures without upgrading the PSU.
I think the safest card with the stock PSU is a solid GTX 960 (MSI or EVGA).
GTX 970 is a great match for the system.
Do yourself a favor and spend the money in a decent PSU (750w min.) it is pointless to buy a new CPU card and play chicken with the PSU. You do not want to kick yourself later for busting your new GPU because your PSU does not have enough juice to power it.
Do yourself a favor and spend the money in a decent PSU (750w min.)
I agree on investing in an excellent PSU.
I would size the PSU based on what you plan to put into it.
I find 650W is adequate for any single graphics card in a non-overclocked (haswell, Devils Canyon, Skylake) system.
EDIT -- this is for any single nVidia card. the R9s might have a card that pulls too much power for a 650W PSU, but I don't have any hands-on with the AMD cards.
note that EVGA's "Power Meter" web page "estimates and recommends" 550W as sufficient for an 980ti in a 4790 system
It won't hurt to get 750W as long as it fits, but to me it isn't necessary.
A Cosair 750M power supply is a good and popular choice. Newegg had it on sale for $59.99 a few days ago - sweet! :-)
Imho, to be "safe" with the stock CPU cooler and power supply, you really want to stay under ~100watts.
You can run 15amps through a thin extension cord. "It works". And, it's also the cause of many fires and loss of property. So, just because someone does something and "it works", that does not mean that it's safe or a good idea. Nor, does that mean that it will work for someone else.
Imho, if you do not want to upgrade the power supply (imho, that *is* a different level of modification than adding a PCIe card or memory), then what *I* suggest is wait a few weeks for the latest ASUS GTX950 video card to hit the retailers:
ASUS GeForce GTX950-2G specs:
Me: Geek to the nth degree. 
I really appreciate the feedback. So I finally made up my mind and want to get the gtx 970. So which 750w PSU will fit perfectly in my xps 8900? And is there a mini 970 form factor version yet? Because a 970 is a huge card lol!