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Windows 7: Defective Card?

31 Jan 2010   #11
blackroseMD1

Windows 10 Tech Preview 9926 x64
 
 

lol, probably. You could get a 600W pretty cheap though...although, if you can afford it, I would go 650-700.


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31 Jan 2010   #12
thefabe

Windows 7 ultimate 64 bit / XP Home sp3
 
 

Also you always have to remember it's not the wattage as much as it's the Volts delivered on the 12v rail(s) that is the main thing. Fabe
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31 Jan 2010   #13
LPDad

Windows 7 Ultimate x64
 
 

LOL...Just to clarify here:

It is the amps that will kill you not the volts. ... It's the amps, but you need to have a high voltage to actually push those amps through

Oh wait...what were we talking about???

Watts, Volts, Amps.
(Potato, Po-Ta-Toe, Tomato, To-Ma-Toe)
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31 Jan 2010   #14
Evilclive

Windows 7 Home Premium 64-bit
 
 

Well i posted my PSU, you guys tell me if it has enough amps or volts lol
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31 Jan 2010   #15
bobkn

Windows 7 Pro X64 SP1
 
 

I'd take this with a grain of salt, but see here:

eXtreme Power Supply Calculator

This suggests that you need over 350W.

However, if you search for power consumption benchmarks for the Radeon 4870, you'll find system level full loads like 233W, so maybe it's a good estimate.

Looking at it a different way, the 4870 has two PCI-E 6 pin power connectors. The maximum theoretical power draw by the card must be less than 225W (75W through the graphics slot, 75W each for the 6 pin PCI-E connectors).

Your PSU has two +12V rails, each rated at 18A. As long as you don't add that second 4870 in Crossfire or go too crazy overclocking your CPU, you ought to be fine.
My System SpecsSystem Spec
31 Jan 2010   #16
Frostmourne

Windows 7 Ultimate x86-64
 
 

Quote   Quote: Originally Posted by bobkn View Post
I'd take this with a grain of salt, but see here:

eXtreme Power Supply Calculator

This suggests that you need over 350W.

However, if you search for power consumption benchmarks for the Radeon 4870, you'll find system level full loads like 233W, so maybe it's a good estimate.

Looking at it a different way, the 4870 has two PCI-E 6 pin power connectors. The maximum theoretical power draw by the card must be less than 225W (75W through the graphics slot, 75W each for the 6 pin PCI-E connectors).

Your PSU has two +12V rails, each rated at 18A. As long as you don't add that second 4870 in Crossfire or go too crazy overclocking your CPU, you ought to be fine.
Whatever that site recommends, double it. For me it came up to around 625w, so 650w is enough.
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