I'm playing on an AMD HD 5770 here (w/ i5-750 LGA1156 Quad CPU, 4GB RAM, W7HPx64) and it's not smoothly playable on 1920x1080.

If you don't want to buy another new GPU when you upgrade your MoBo and CPU, stick with something slightly better (GF560, GF560ti, AMD HD6870).

I've been using similar "awful cheap Chinese PSUs " all my life and my computer has never caugth on fire. Perhaps it is cause I look at the specifications rather than at the BRAND.

I bet you also are an Intel/nvidia fan boy, and you probably own a mac....

Every one is entitled to their own opinions but do not give false advise.
If you'd have bad experiences in the past buying something other than those high quality PSU (which I admit some of those are) it is because you did not calculate the correct power requirements and/or because you leave your PC on 24/7, which singly is one of the primary causes of HD and PSU failures.

Its a DEER, dammit! No DEER is safe at even half its (fictitious) ratings. Just look at the record of DEER power supplies. It's not me; it's thousands of people who have had DEER power supplies blow out, catch fire, or damage other components in their computer.

Nobody who knows anything about power supplies and is in their right mind recommends a DEER to anybody. You just lost any credibility I was willing to extend you.

What are you talking about, I've never heard of any "DEER" before, what I linked is a Rosewill, and like I said I don't practice brand favoritism.

Rosewill does not manufacture power supplies. Rosewill sells power supplies made by other manufacturers under its name.

Deer is a manufacturer. Deer power supplies are sold by Rosewill (the Rosewill "Value" series), Allied, and other vendors.

The power supply business is very different from, say, the graphics card business. In the graphics card business, the chip designer also produces a "reference card" design. Most graphics cards use the reference design, and they differ only in the cooler, warranty, tech support, and packaging.

In the power supply business, there are no "reference designs": each manufacturer designs and manufactures its own. The reputable manufacturers do not cut corners: they use designs with well-designed filtering, regulation, cooling, etc., and they use quality components. They rate their power supplies for continuous operation at full load and realistic operating temperature. When a need for a particular specification exists, such as the specification of the maximum combined load across multiple +12V rails, that specification appears on the nameplate of the power supply.

The disreputable manufacturers cut corners: they use the cheapest possible circuits and components, down to and including known defective capacitors; their specifications are mere fiction, resulting in loss of regulation, internal damage, outright failure, catching fire, or emitting toxic capacitor contents somewhere around one-half to two-thirds of their fraudulent specifications. Deer is just one of many disreputable manufacturers; however, due to the numerous scandals in the power supply business, Deer is the most notorious.

People who believe the "specifications" put forth by these disreputable manufacturers and the care-nothing vendors who market power supplies manufactured by them are their lawful victims.

Three large power supply manufacturers known to be reputable (even if they produce some cheap lines) are Seasonic, Channel Well, and Delta. Seasonic power supplies are sold under a variety of names, principally Corsair, Antec, and their own. Channel Well power supplies have long been sold by Corsair. Delta makes primarily server power supplies, though a few of their supplies are sold by Antec as the Earthwatts "D" series.

My company builds servers that are designed for five years or more of continuous operation. We use only Seasonic and Delta-made power supplies. I like to think we know what we are doing.

This is not true. Seasonic makes excellent low-end power supplies. And on any normal PC (not crammed full of power guzzling gear, no SLI/Crossfire setups, etc), 500W is way more than you'll ever need. (In fact, it's always been my impression that it's the 800W PSUs that are completely unable to reach their rated power output. Though obviously they have a bit more leeway.)

I admit I haven't been following developments the last few years, but back when I bought my current PC, 3 years ago, many manufacturers were moving towards lower power consumption, especially Intel CPUs and ATI GPUs, at that time. It's possible that trend has reversed again, though I hope not.

In any case, my PC with E8400, ATI 3850 and two big harddisks works perfectly fine with my 380W Seasonic.

Obviously, it's worth paying attention to the power consumption of all the components in your PC. But it would surprise me if there wasn't some low power/high performance successor to my 3850 (which I am considering replacing for The Witcher; it's good enough for low graphics, but I might want to see a bit more of this gorgeous game).

Back to PSUs: It's also worthwhile to check the efficiency of any PSU. Low efficiency means power lost as heat, which means higher temperatures, which means there's a bigger chance of anything breaking. Not to mention the lower power output. Anything below 80% sucks; avoid at all cost. The US has an 80 PLUS rating certification with bronze, silver, gold and platinum certification indicating even higher efficiency.

I have a GTX 260 so I'm getting about 30fps but I'm going to be waiting for Kepler which is expected to come out 2nd half of 2011 or late 2011.

In your case I don't know if you can suffer through the 15fps for half a year. But Kepler is expected to have like 50% more performance but 40% less power than Fermi. Which makes it worthwhile for me to wait.

Soon as you up that 3850 (75W TDP) to, say, a 5870 (188W TDP), that nice Seasonic will be inadequate. And there will be few replacements capable of the needed 34A or more at 12V under 500W. Nothing from Seasonic short of 500W.

Yes, there are very good power supplies in the 300-450W range, mostly Seasonic and a few Delta. No, none of them are adequate for a high-end graphics card and a 125W CPU.

Don't expect to run anything less than a 500W PSU at a continuous load of 300-350W, which is what you're going to pull with a good CPU and high-end GPU. Even power supplies rated for such continuous load, like the 380W and 430W Seasonics, are going to be operating in a range where their efficiency and regulation specs are at best marginal and most likely violated.

The Radeon HD 6850 requirements state 400 Watts, if your 380 really is efficient, it could probably handle the 6850.

Actually, before we go any further, we need to take a step even further back and ask just what kind of computer the OP has.

The only "4570" put out by ATI was the Mobility 4570 notebook GPU.

So either there's a typo that we all overlooked, or we all overlooked the possibility that the OP has a notebook computer. Dell, Sony, and Acer have all made notebooks with this combination (E7500 CPU, M4570 GPU).

If that's the case, then all this arguing over upgrading is futile and off topic, because the OP has no way to upgrade his present computer.

Upgrade and OS politics given.

Hardware arguments are always childish in any case by the simple fact that if you know enough to be aware you already lost whatever pissing game you were playing..

Base budget design i'll do to help but my basic gear is'nt something you can pick up from the corner shop.

While it was originally intended as a desktop CPU, that CPU (E7500) was used in a number of notebooks. There have been a number of LGA 775 notebook designs. That's why I raised the possibility that the OP's "4570" was not a typo: that he really has a notebook.

Well if it is, then it sure won't be able to handle this game as others have said.