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Will a 450watt Fortron be able to handle upcoming upgrades?

S

Smartazz

Diamond Member
I have 1 Hard drive, 1 Dvd Drive, a 2.7GHZ X2 processor, M2N-E motherboard and a 7900GT. I'm planning to get a 8800GTS and possibly an 8800GTX, but I think the 8800GTX would put me over considering the cpu is highly overclocked and the 8800GTX uses a ton of power. Should I use this power supply in my other computer and buy a 600 or 700 watt PSU instead? Thanks.
 
Originally posted by: Howard
Depends on how much power the 8800 will actually use.
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I would not be surprised if it's less than the X1900XTX. When stressed HARD and the fan reaches top speed the air coming out the back can shrink heat shrink tubing! :Q
 
Originally posted by: MS Dawn
Originally posted by: Howard
Depends on how much power the 8800 will actually use.
Click to expand...


I would not be surprised if it's less than the X1900XTX. When stressed HARD and the fan reaches top speed the air coming out the back can shrink heat shrink tubing! :Q
Click to expand...
Did you mean more?
 
Originally posted by: Howard
Did you mean more?
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Nope. The X1900XTX is crazy hot. At least the cooler is designed properly and rejects as much heat as possible outside of the chassis housing.
 
either way, i highly doubt that 450w will be able to power that kind of a system. it takes a 500w psu for me to run my x1900 and other junk, but with the 8800... i dont think 450w will cut it. frankly, i dont know how you're getting by with a 7900gt on a 450w psu. my old axp rig isnt stable at 350w, needed a boost to 430w to operate correctly.
 
Originally posted by: chubbyfatazn
either way, i highly doubt that 450w will be able to power that kind of a system. it takes a 500w psu for me to run my x1900 and other junk, but with the 8800... i dont think 450w will cut it. frankly, i dont know how you're getting by with a 7900gt on a 450w psu. my old axp rig isnt stable at 350w, needed a boost to 430w to operate correctly.
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The 7900GT is really efficient. If I got a 700watt OCZ PSU, then could I keep it for several rigs after this one?
 
It depends on the quality of the PSU, whether they're stating peak or sustained power.

Seriously folks, even most current high-end rigs would be hard-pressed to draw more than 300W at the wall. With an 80% efficient PSU, we're talking 240W actually being used by the components, which is how the PSU rating is measured - not at the wall.

I don't know what the 8800GTX/S is going to pull, but somewhere around 12A on the 12V may be a good guess. I'd say you're probably ok with a PSU that can sustainably put out 25A on the 12V line, provided the rest of your system is minimalist - CPU/sound card/no more than 2 hard drives/1 optical. If you SLI these things, I'd guess then that 700W would become necessary.

Either that, or you could use two PSUs - one for the mobo, the other to the power molex(s) on the video card.
 
Originally posted by: Dethfrumbelo
It depends on the quality of the PSU, whether they're stating peak or sustained power.

Seriously folks, even most current high-end rigs would be hard-pressed to draw more than 300W at the wall. With an 80% efficient PSU, we're talking 240W actually being used by the components, which is how the PSU rating is measured - not at the wall.

I don't know what the 8800GTX/S is going to pull, but somewhere around 12A on the 12V may be a good guess. I'd say you're probably ok with a PSU that can sustainably put out 25A on the 12V line, provided the rest of your system is minimalist - CPU/sound card/no more than 2 hard drives/1 optical. If you SLI these things, I'd guess then that 700W would become necessary.

Either that, or you could use two PSUs - one for the mobo, the other to the power molex(s) on the video card.
Click to expand...

I was planning to try to use this PSU to power all these things then get a dedicated PSU for the video card. How will I know if my PSU isn't cutting it?
 
I've never had a PSU hit the wall before, but I'd say not being able to boot would definitely qualify. If you can get past that and yet your system is unstable, random reboots and the like, especially during heavy gaming, that would be another sign. If the PSU gets hot fast and the fan spins up to its highest speed, that would also demonstrate stress.

There are also some programs out there which can give you line voltage readings through the mobo (albeit not as accurate as getting out the voltmeter/oscilloscope) - Speedfan is one. If you see your 12V line start to fluctuate, you've got problems.
 
Originally posted by: Smartazz
Originally posted by: Dethfrumbelo
It depends on the quality of the PSU, whether they're stating peak or sustained power.

Seriously folks, even most current high-end rigs would be hard-pressed to draw more than 300W at the wall. With an 80% efficient PSU, we're talking 240W actually being used by the components, which is how the PSU rating is measured - not at the wall.

I don't know what the 8800GTX/S is going to pull, but somewhere around 12A on the 12V may be a good guess. I'd say you're probably ok with a PSU that can sustainably put out 25A on the 12V line, provided the rest of your system is minimalist - CPU/sound card/no more than 2 hard drives/1 optical. If you SLI these things, I'd guess then that 700W would become necessary.

Either that, or you could use two PSUs - one for the mobo, the other to the power molex(s) on the video card.
Click to expand...

I was planning to try to use this PSU to power all these things then get a dedicated PSU for the video card. How will I know if my PSU isn't cutting it?
Click to expand...

Dethfrumbelo is giving you good advice. While it's impossible to say for sure until the card is released unless the 8800 doubles the power from current cards you should be fine.

If you want to get an idea of how much power your system is using you can pick up a power meter, such as this Seasonic.
 
I've got a 3800X2 running @ 2.6ghz, four hard drives including a raptor, a 7900GT voltmodded, and two dvd drives running on a 450 watt fortron. Spending $100 to get a 800 watt PSU is a waste of money.
 
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