Sign in with
Sign up | Sign in
Your question
Solved

Upgrading on a pretty tight PS

Last response: in Graphics & Displays
Share
January 2, 2010 6:15:35 PM

I own an Hp computer with Phenom 2 X4 925 processor, a Nvidia HD 4650 1GB DDr2, 8gb DDr2 Ram and a 300 Watts PS. I know I'm pretty tight on watts and I want to upgrade my videocard to 5750, as it is a low consumption card with good performance. I know I have about 30 free watts (in intensive gaming) in my system. And the spec for 4650 are 75 watt consumption at highest performance and for 5850 it's 86 Watts. Is the 15 left watt safe enough for the system? Do you guys think I could downcloak the 5750 a bit to reduce the power consumption since the card is at least 4 ou 5 time more performant than the 4650. I'd like to have you opinions, thank you in advance

More about : upgrading pretty tight

a b U Graphics card
January 2, 2010 6:18:43 PM

Full system consumption of a pc with an HD5750 is about 170-200watt at full load. Sounds like you should be covered. What type of PSU do you have?
m
0
l
Related resources
January 2, 2010 7:22:36 PM

yeah but 84 watt for 5750 is the max watt load when the gpu use 100% of it's capacity. 4650 is about 75 but in non-stressful situation it is true it takes about 40 watts. Am I right?
m
0
l

Best solution

a b U Graphics card
January 2, 2010 7:41:05 PM



Share
January 2, 2010 9:12:49 PM

Thanks Guys, very useful indeed
m
0
l
January 3, 2010 3:34:43 PM

That seems logical but it also requires a 450 watt power supply for the 4650, which I'm running on a 300 watts. It's a factory built Hp computer, I was surprised it could run on 300 watt but so far it has been flawless.
m
0
l
a c 263 U Graphics card
January 3, 2010 3:46:33 PM

marcotf10 said:
That seems logical but it also requires a 450 watt power supply for the 4650, which I'm running on a 300 watts. It's a factory built Hp computer, I was surprised it could run on 300 watt but so far it has been flawless.


The 4600 series is entirely powered by the pci-e slot which can deliver 75W. The AMD requirement is a 400w psu only:
http://www.amd.com/us/products/desktop/graphics/ati-rad...
Vga requirements tend to be conservative, knowing that some users will try to run with low quality psu's that do not deliver their advertised power.

In addition to the 75w slot power, the 5750 needs a pci-e power connector which can deliver an additional 75w.

If you need more psu capability, and don/can't want to replace your psu, FSP makes an auxiliary psu for graphics cards that can power any single card. It fits in a 5 1/2 bay.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
m
0
l
January 3, 2010 4:15:45 PM

It is still not really a cost effective solution, as a 450 wat Ps run around 80-90. If I plug the 5750 with the extra 75 watt, it won't use all of it, maybe only a 15 watts or so. I guess it's safe to conclude such a upgrade is a bit risky but it would work if I doiwncloak the card a bit (maybe 10%) and wait a year or 2 for a brand new Ps and 5750 SLI instead.
m
0
l
!