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Would I be able to run a HD 6770 with my PSU?

Hi, I've recently bought a Acer Aspire M3410 Desktop, I am a casual gamer and the performance is not so bad but the only bottleneck is the GPU, wich is a AMD Radeon HD 6570.
I would like to play some games at 1080p, but my current Graphic Card lags too much at Full HD.
I was wondering if I could run without problems a HD 6750 or even an HD 6770 with my current PSU, I would prefer not to buy a new one.
Would I be able to run them without problems with my Current 300W PSU?

Here is my computer Specs :

AMD Phenom II X4 840T @3GHz - 95W TDP
2 DIMMs (4GB Each)
1.5TB WD Caviar Green 7200rpm
AMD Radeon HD 6570 GDDR3 - 44W TDP

Brand : FSP 300-60THA
300W (+3.3V & +5V = 130W)

+3.3V - 20A
+5V - 26A
+12V1 - 8A
+12V2 - 14A
+5Vsb - 2A
-12V - 0.8A

A general Motherboard consumes 65W, and the HDD 20W.
Without my current GPU,

So here is where I am Confused, when I should be able to use that card with my PSU, AMD Recommends much more?

With my current PSU I "should" be able to run without problems the HD 6750 and the HD 6770, but AMD Recommends 450W.
HD 6750 --- 180+86 = 266W
HD 6770 --- 180+108 = 288W

I wanted to say that I would not upgrade my 6570 for an 6670, their performance is too similar...
Also, should I wait for the HD 7750 and the HD 7770 and buy those?

Thanks in advance! :hello:

P.S. I have a 4 year old 400W PSU from one of my old custom-build computer, I read somewhere that older PSU's are less efficient than newer ones, but I don't know if the difference is really that big. (like 100W of difference)

Brand : MAX POWER - MAX-500ATX
400W (+3.3V & +5V = 235W)

+3.3V - 28A
+5V - 30A
+12V - 12A
+5Vsb - 2A
-5V - 0.5A
-12V - 0.8A

Thanks again! :)

If this is in the wrong section, please move it to the right one because I am confused about putting this in the GFX section or the PSU Section. :??:
7 answers Last reply Best Answer
More about would 6770
  1. AMD's recommendations are based on worst case scenarios. They don't know for sure what PSU you have or what other components are installed, so they err on the cautious side, and recommend a higher wattage than might actually be required.
  2. It is not about the overall power, but instead about the 12 volt power. 12 volt power is what many parts on today's systems use(cpu/video).

    That 500 watt unit you list at the end actually has LESS power(12 volt) then your current one most likely.

    On the FSP website, they state that if you are not pulling lots of 3.3 and 5 volt, you CAN pull upto 22 amps(thats 264 watts) from that power supply. Now that "should" run the thing as long as you overclock nothing at all.

    loading chart

    I have a similar unit running a 5770[thats the same as 6770] + i5 750 system without issue., but my system was picked for power efficient parts as well. Mine never pulls over 200 and honestly lives in the low 40's(24 with a 4350 in it) at idle and games at about 150-150.

    AMD's recommendation is all about many poor designed power supplies out there. You can get 500 watt power supplies with less 12 volt current(amps) then a good 250 watt unit.

    You are getting to the end of the units power under extreme load, so it may be worth looking at a good quality unit like Corsair,Antec,Seasonic,ect. If you do not push the crap out of it, it should be fine.
  3. Then if I put in a 6770, would it damage my system or blow up my PSU?
    Is the 7770 less power-hungry since it is 28nm?
    So according to you, it will most likely work?

    Also, thanks for responding as quickly.
  4. Best answer
    There is never a guarantee if a power supply will take out parts when it dies, most quality units do not, cheap ones can kill parts for sure.

    I have only seen one FSP power supply fail, it just stopped working.

    When the 7770 comes out, it may take less power, but amd may choose to take the same power but make the card much faster. You can get more hardware in the same power envelope with the new 28nm process.

    From my personal experience, it should work(I mean, dont go overclocking), but as i have said, i picked parts for lower power consumption and I also undervolted the cpu for even more power savings.

    As power supplies get older, they loose a certain amount of power as well(capacitor aging), so keep this in mind, my media center system has a fairly new power supply.

    If you get a power monitor from a local hardware store, you can tell exactly what your system is pulling from the wall.

    I have this one.

    The DC power is actually lower(due to losses in the power supply, so what you read at the wall is more then what the power supply is providing) then this so that would give you an idea of power usage. They sell them at most hardware stores.
  5. Thanks for the tips, I think that I would wait a bit and buy an 7750, wich is way more powerful than my current 6570.
    I will keep you updated if anything bad happens. If it does, oh well, I will have to spend 50$ on a better PSU.
  6. Best answer selected by bloc97.
  7. look at the corsair builder series if you do get a new power supply, good price and reliable.

    ohh and if it seems to good to be true for the price, chances are it is.
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