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amd 7750 work with a crappy 400watt?

post #1 of 16
Thread Starter 
Alright, I was about to buy dirt 3 today, and then i remembered that my brother still has a crappy gt 430 that he plays dota 2 with. He is always complaining about fps lag. So i watched him play and in certain spots he does get to around 15-20 fps frown.gif. So, being the good brother that i am i saw that they are giving away dirt 3 with a 7750 This one to be exact. What i am wondering is will his psu handle it? he has a 400 watt rosewill psu that came with this. It looks to me that the 7750 is about 5770 performance while using very little power thumb.gif. I was just wondering if it would work as a whole for his system.

The rest of his system is Q8600 ( I think) 4 gig ddr2 and just a caviar blue. Thanks thumb.gif
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post #2 of 16
He should be safe with that much watts. You can use this calculator to get an idea smile.gif

http://extreme.outervision.com/PSUEngine
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post #3 of 16
Thread Starter 
Quote:
Originally Posted by dejahboi View Post

He should be safe with that much watts. You can use this calculator to get an idea smile.gif
http://extreme.outervision.com/PSUEngine

hmmm. Is there anyone has had experience with the 7750?
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post #4 of 16
Yeah, I just took one back today.. is a single GPU card, that uses less power..
     
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by Morbeious View Post

Yeah, I just took one back today.. is a single GPU card, that uses less power..

lol why did you take it back? Just wondering. I know it is not the most powerful card, but it seems like a good one
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post #6 of 16
Its an ok card.. I actually folded on it for 24 hours.. It worked fine.. I just wanted more GPU's on a cheap card.. so I took it back and got a 7800 series.
     
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post #7 of 16
7750 has roughly the same gaming power as a 6770. You can get a significantly more powerful GPU for about the same price after rebate and promo code here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130749

However your power supply is what we call terrible. It would have enough wattage... if it could actually reach its advertised 400w output. Which seems unlikely.

Here's a genuinely quality power supply on sale for $30:
http://us.ncix.com/products/?sku=60491&vpn=NEO%2DECO450C&manufacture=Antec&promoid=1058

If you decide you don't want to bother upgrading the power supply, I wouldn't recommend buying the video card I linked above... it will probably be more than your PSU can handle when running at full power. A 7750 should be ok, since it pulls less wattage. I would really advise replacing the PSU though.
    
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post #8 of 16
Thread Starter 
Quote:
Originally Posted by MisterFred View Post

7750 has roughly the same gaming power as a 6770. You can get a significantly more powerful GPU for about the same price after rebate and promo code here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130749
However your power supply is what we call terrible. It would have enough wattage... if it could actually reach its advertised 400w output. Which seems unlikely.
Here's a genuinely quality power supply on sale for $30:
http://us.ncix.com/products/?sku=60491&vpn=NEO%2DECO450C&manufacture=Antec&promoid=1058
If you decide you don't want to bother upgrading the power supply, I wouldn't recommend buying the video card I linked above... it will probably be more than your PSU can handle when running at full power. A 7750 should be ok, since it pulls less wattage. I would really advise replacing the PSU though.

Yeah, it appears that the gt 430 pulls around the same watts under load as the 7750 so it should be A OK thanks for the input tho. I already know i can get a better card with MIR's and what not, its just that i dont want to change out the psu thumb.gif
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post #9 of 16
isn't the number of amps on the 12v rail what you should be concerned about since
the gpu will be pulling current off of the 12v rail? 400w does not mean it has enough
juice on the right rail for that card. I am not saying it does not either but I would check
just to make sure biggrin.gif
post #10 of 16
Well there's two things. One is the number of amps on the 12v rail. The other is poor voltage regulation/dirty power. Since he was already running a 430, he can probably handle the 7750. And the PSU probably won't damage his components over time... it's that last probably that really keeps people away from crappy PSUs.
    
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