Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: what is the power supply installed?
Document: And then upgrade the power supply, RAM, graphics card (to a Geforce GTX 660), and boot drive with the Samsung 840 Pro 256 GB SSD, and sit back and watch this monster wail.]
)540MB/s Read Speed520MB/s Write Speed6Gbps Data Transfer RateThings you should buy if customizing:- 600 watt Power Supply (PS). Cost $100 on HP website. Why? About the same price to upgrade should you decide to it yourself later, without the hassle of trying to sell the standard 300W PS to get cash for new PS.
This rig is simply a powerhouse. Or make the same upgrades to max out your Amazon purchase for $1170. At these prices, you can't lose. ][Edit Update, 7-8-2013: Price continues to fall on Amazon, to $750. I've updated this review to recommend a 600W replacement power supply, about $70 on Newegg, to ensure you've got power to spare.
I think I'm going get a lot of art done with HP as my partner. It doesn't even mind when I have Bridge, iTunes, Photoshop, and Chrome opened at the same time.Some specs I ordered include 256G solid state drive, 1TB hard drive, 2GB graphics card, quad core processor, 10 GB RAM, and 600 watt power supply. Though originally I didn't want a computer built in a foreign factory, at $1350, price was the deciding factor.
Problem solved. (My gut feeling is it's an unresolved 64 bit driver issue with the installed and integrated sound card, but I can't prove that and I don't want to do research and development for HP. Oh well.
Why not just send a DVI cable since both computer and monitor have DVI ports?So far i am impressed, if I don't feel the same in a few months I'll be writing another review. And who knows, a computer with this much power might just make a gamer out of me.
When I customized it, I opted not to have any security software installed because I wanted to install my own. However the installer for Norton is there and everyday annoying task windows pop up nagging me to activate Norton and I can't get rid of them. No means no, HP. Why did you burden me with the Norton pest?
I had not even installed any software at all on the second PC before it started crashing. The HP technical people were very patient and trying to help -- I had no problem with them except that they had accents that were hard to understand at times, and they wanted to perpetuate the marathon of failed diagnostics and recovery attempts long after I had given up and just wanted to return the "thing".
Much of this time was pleading with them not to insist upon a full system restore (can you imagine?) just to verify and test something I had installed wasn't affecting the ports ability to read/write data (I had an external Passport drive attached to it that would bomb during backups). Finally I convinced a manager that I had a bad port and they sent a unit - a tech to replace it - and all was well. This took weeks. Literally. Brand new machine. Literally.
very fast  great machine. I like professional 7 window  I shopped around a lot and this machine has the best specs and price
Answer: I believe it was a 300 watt supply.