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http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html
Not long ago I would have been able to recommend you a higher end AMD card like a HD 7950, or even HD 7970 or R9 280 + a new PSU (unless yours is 500w gold/platinum or something) for under $300 but unfortunately those are now either sold out or overpriced because demand for high end AMD cards recently exceeded supply.
Anyways, both GTX 760 and R9 270X are good cards and fairly equal in stats overall.
I doubt that since the official steam machines come with 450watts and a gtx 780. I think its more important to have enough amps going to the graphics rail. some 600watts will njot work when a 450 will.
If it's quality PSU then easily.
7950 will take approx 270W in stress.
Nvidias take even less. GTX 770 will take only ~210W
600W+ is only needed for monster cards / crossfire / sli or heavily overclocked systems.
PSU requirements at nvidia/AMD site are heavily overestimated because some people are still using cheap chinese PSUs (ie promises 1000W, but actually gives 300W)
You can't just count a GPU, u need to consider this...
Typical CPU = 65 - 125 watts (determined by CPU model)
GPU TDP wattage requirement (GTX 760 2GB/4GB = approx 170-180 watts max)
The wattage used by the rest of the system, which is typically around 80-125W depending on motherboard and the installed components (SSD, HDD, ODD, Fans, etc.)
So when a GPU says it requires 500-watts minimum, it is referring to total system wattage with a single GPU included. And the minimum wattage is also when using a quality PSU. If you are using a cheap/generic one that poor/inefficient, then good luck meeting the minimum with one of those. As you should always invest in a quality PSU to help get both efficiency and longer lasting system overall.
If u want a better idea of current system power usage, or to see if after changing a part, I highly suggest one of these:
http://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q
BTW, when I bought the parts for my new build, I got a Corsair CX500W power supply, can that be considered "quality" enough to run a GTX660 TI and a FX-6300 with some possibilities for upgrading?
But just saying. People tend to buy overblown PSUs because they overestimated their real needs.
My second machine is nicely running with i5 2500K, AMD 7970, SSD and HDD with 550W psu.
CX series is budget PSU, but it still has 80% effinency so yeah. 660 Ti takes around 200W in stress.
Yeah.
Most systems nowa days, even with a high-end CPU and single GPU will only require around 500-600 watts max.
You only really need to consider ones in the 850W and above range if u are ever considering to use a multi-GPU setup (AMD CrossFire or NVIDIA SLI)
FX-6300 = 95 watts max
GTX 660 Ti = 150 watts max
So for total system wattage with these, u are looking at approx 400 watts max
But again that is considering that u have a couple drives and fans. So with a good 500-watt PSU, something like GTX 760 or 770 shouldn't be any issue.
I seriously would consider GTX 760 2GB though. With that u should be fine for playing games @ 1080p for quite some time.
If you want a high quality PSU at decent pricing, I would consider EVGA SuperNova NEX 650G or 750G, which are 80+ Plus GOLD Certified and carry 10 year warranty.
My monitor doesn't even support 1080p, I get motion sickness from high resolutions and I don't honestly give a ♥♥♥♥ if a game has a tiny pixel here or there showing. The GTX760 is also too expensive for my 700€ budget. And I already bought a GTX660 TI.
People seem to think they get sick or get headaches with higher res. Seriously has nothing to do with it. This usually occurs with cheaper displays or system specs, where u might be experiencing screen-tearing or lagging. Screen tearing quite easily can result in headaches, depending on playtime. If the on-screen display is smooth, then resolution (especially in games) should not matter. But the issue is that most games look very bad below 720p. Old CRT (Tube) types of Monitors/TVs can often produce headaches, due to the constant vertical scanning due to refresh rate. You usually can never see this, but your brain can. It can easily be seen when you look through a camera or when you capture videos/pictures through cameras.
I don't give a ♥♥♥♥ if the game looks bad, I've played so many ugly-as-hell games that I've gotten used to it. My monitor is a nice Sony 17" LCD with built-in speakers, really clear picture with no
stuttering or bending. I got that monitor for free from the place my dad works at after his work PC broke down and he got a new one with a new monitor xD. I used to play on a HP Pavilion F1523 15" LCD from around 2003, no problems with that one either.