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Why do you need a 1500W power supply unit?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - Why do you need a 1500W power supply unit?

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veryhappyyes   06-15-2009 at 03:29:29 AM

1500W power supply unit is very expensive.

When is a good time to use a 1500W PSU?

What about the future, will CPU's and motherboards and graphics card require 1500W psu?

I mainly use the pc for games - high end graphics card, cpu's.

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theAnimal   06-15-2009 at 04:11:11 AM
- 0 +

veryhappyyes wrote :

When is a good time to use a 1500W PSU?


If you are running 4x GTX295 or HD4870x2.

Quote :

What about the future, will CPU's and motherboards and graphics card require 1500W psu?


No more so than today. Future CPUs and graphics cards shouldn't use much more power due to using a smaller process.

Quote :

I mainly use the pc for games - high end graphics card, cpu's.


For a single GPU system, a good quality 500W PSU is plenty.

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cjl   06-15-2009 at 04:14:21 AM
- 0 +

You don't need a 1500W PSU. Even the highest end gaming systems right now can be run off of a 1000W PSU.

------------------------------ Asus P6T deluxe
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maximiza   06-15-2009 at 04:42:06 AM
- 0 +

special configurations, 8 hard drives, 40 case fans, tri sli, 25 case neons, liqued nitrogen cooling, massive red line overclocking

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The_Blood_Raven   06-15-2009 at 05:32:26 AM
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maximiza wrote :

special configurations, 8 hard drives, 40 case fans, tri sli, 25 case neons, liqued nitrogen cooling, massive red line overclocking

 

a 1kw PSU would handle that.

 
theAnimal wrote :

If you are running 4x GTX295 or HD4870x2.

 

That too.


Message edited by The_Blood_Raven on 06-15-2009 at 05:33:03 AM
Reply to The_Blood_Raven
cjl   06-15-2009 at 06:30:25 AM
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4 GTX 295s or 4 HD 4870x2s (8 GPUs total) would probably overload a 1KW unit at full load. Of course, since 4 GPUs is the most supported by drivers, I don't see why you would ever have that.

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------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
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croc   06-15-2009 at 06:47:54 AM
- 1 +

veryhappyyes wrote :

1500W power supply unit is very expensive.

When is a good time to use a 1500W PSU?

What about the future, will CPU's and motherboards and graphics card require 1500W psu?

I mainly use the pc for games - high end graphics card, cpu's.



1500 watts comes in very handy for starting cars, minor arc welding, etc. An indispensable item around my house...

Reply to croc
jimishtar   06-15-2009 at 02:32:36 PM
- 0 +

u dont need 1500 w psu. u can just use a 3-faze power connector on the wall, if u have one in your house. i am sure it will be enough.

Reply to jimishtar
The_Blood_Raven   06-15-2009 at 06:03:40 PM
- 0 +

cjl wrote :

4 GTX 295s or 4 HD 4870x2s (8 GPUs total) would probably overload a 1KW unit at full load. Of course, since 4 GPUs is the most supported by drivers, I don't see why you would ever have that.



Exactly, the other 2 cards would be at idle the entire time, unless you make custom drivers. My system only pulls 800w from the wall when running prime95 and 3dmark Vantage.

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theAnimal   06-15-2009 at 10:57:40 PM
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The_Blood_Raven wrote :

Exactly, the other 2 cards would be at idle the entire time, unless you make custom drivers. My system only pulls 800w from the wall when running prime95 and 3dmark Vantage.



There are Folding rigs with 4x GTX295 or 9800GX2. The drivers support 8 GPUs, just not in SLI.

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blackhawk1928   06-16-2009 at 06:05:17 AM
- 0 +

There is no such thing as 8 GPU's support 4x GTX295 is 4 GPU's, 2 GPU per card, meaning 2 GTX295 is quad SLI since a GTX295 has 2 GPU's in one PCB...unless i misinterpreted your question

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cjl   06-16-2009 at 06:35:14 AM
- 0 +

blackhawk1928 wrote :

There is no such thing as 8 GPU's support 4x GTX295 is 4 GPU's, 2 GPU per card, meaning 2 GTX295 is quad SLI since a GTX295 has 2 GPU's in one PCB...unless i misinterpreted your question


4 GTX 295 would be 8 GPUs (1 GTX 295 has 2 GPUs).

Message quoted 1 times
------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
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jamesgoddard   06-16-2009 at 03:13:32 PM
- 0 +

theAnimal wrote :

There are Folding rigs with 4x GTX295 or 9800GX2. The drivers support 8 GPUs, just not in SLI.



QFE - Both nvidia and ATI drivers support 8 GPU's - just not SLI..

You may have a CUDA enabled app and love the performance 4 x Asus MARS (aka 8 x GTX285's) would offer - I am not sure that 1500kw would be enough for some people....

Message quoted 2 times
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blackhawk1928   06-16-2009 at 05:26:04 PM
- -1 +

cjl wrote :

4 GTX 295 would be 8 GPUs (1 GTX 295 has 2 GPUs).


There is no such thing as 4 GTX295s!! That would be 8 GPU's and nothing supports that yet, hardware nor software! 2 GTX295's is 4 GPU's.

Message quoted 4 times
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lumpy   06-16-2009 at 05:53:20 PM
- 0 +

blackhawk1928 wrote :

There is no such thing as 4 GTX295s!! That would be 8 GPU's and nothing supports that yet, hardware nor software! 2 GTX295's is 4 GPU's.



I agree 4 295 gtx is pure B/S.not going to happen.

Message quoted 1 times
Reply to lumpy
lumpy   06-16-2009 at 05:54:59 PM
- 0 +

blackhawk1928 wrote :

There is no such thing as 4 GTX295s!! That would be 8 GPU's and nothing supports that yet, hardware nor software! 2 GTX295's is 4 GPU's.



I agree 4 295 gtx is pure B/S.not going to happen.

Reply to lumpy
lumpy   06-16-2009 at 05:59:23 PM
- 0 +

oops..how does one delete a post?

Reply to lumpy
megamanx00   06-16-2009 at 06:39:11 PM
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Perhaps if your using an extended ATX case and put in 4 x 4890s, using a really high vcore on a Phenom II, have 6 hard drive Raid array, tons of case fans, more lights than a christmass tree, 4 blu ray burns and you plan to burn stuff with them all at the same time, and hook up a toaster or coffee maker to it, then I can see a case for such a PSU :D.

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 Reply to megamanx00
Kari   06-16-2009 at 08:32:02 PM
- 0 +

jamesgoddard wrote :

QFE - Both nvidia and ATI drivers support 8 GPU's - just not SLI..

You may have a CUDA enabled app and love the performance 4 x Asus MARS (aka 8 x GTX285's) would offer - I am not sure that 1500kw would be enough for some people....


indeed.

Reply to Kari
Helloworld_98   06-16-2009 at 10:19:31 PM
- 0 +

who said 4x GTX 295's wasn't going to happen?

remember that 23x GTX 295 folding@home thing?

Reply to Helloworld_98
cjl   06-16-2009 at 10:27:10 PM
- 0 +

blackhawk1928 wrote :

There is no such thing as 4 GTX295s!! That would be 8 GPU's and nothing supports that yet, hardware nor software! 2 GTX295's is 4 GPU's.


See above. Both ATI and Nvidia drivers support 8 GPUs. It would allow for ridiculous CUDA type computation.

------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
 Reply to cjl
cjl   06-16-2009 at 10:28:49 PM
- 0 +

jamesgoddard wrote :

QFE - Both nvidia and ATI drivers support 8 GPU's - just not SLI..

You may have a CUDA enabled app and love the performance 4 x Asus MARS (aka 8 x GTX285's) would offer - I am not sure that 1500kw would be enough for some people....


I would certainly hope that 1500kW would be enough for anyone. After all, that's 1500 1kW PSUs... :D

On a more serious note, I think 4 Asus MARS GTX 295s would run fine on a 1500W PSU.

------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
 Reply to cjl
theAnimal   06-17-2009 at 12:28:42 AM
- 0 +

blackhawk1928 wrote :

There is no such thing as 4 GTX295s!! That would be 8 GPU's and nothing supports that yet, hardware nor software! 2 GTX295's is 4 GPU's.



Yes. As I already stated there are Folding@home rigs with either 4x GTX295 or 9800GX2. There are various mobos with 4+ PCIe slots and the drivers support 8 GPUs. They do not run in SLI mode.

------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
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 Reply to theAnimal
theAnimal   06-17-2009 at 12:29:02 AM
- 0 +

lumpy wrote :

I agree 4 295 gtx is pure B/S.not going to happen.



It already has.

------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
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 Reply to theAnimal
veryhappyyes   06-22-2009 at 06:25:47 AM
- 0 +

why would you want 4x295gtx graphics cards? for gamers who play on 30" monitors?

Reply to veryhappyyes
cjl   06-22-2009 at 06:31:33 AM
- 0 +

For gamers, 2 GTX 295s is the best - drivers don't support more than 4 GPUs working together for a single monitor. 8GPUs (4 GTX 295s) is only useful for driving a whole bunch of monitors or for something like Folding@home.

------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
 Reply to cjl
i sea   06-24-2009 at 11:31:29 PM
- 0 +

maybe someone has an amplifier in their pc to run their home theater while using a super overclocked i7 using a phase change cooler and 4X GTX 295s to run folding@home at the same time.

Reply to i sea
B-Unit   06-24-2009 at 11:36:22 PM
- 0 +

SLi only allows for 2 GTX295, so for gaming thats the max setup.

However, so long as you have 4 PCI-E slots, theres nothing stopping you from loading up a mobo with 4 GTX295 for the purpose of GPGPU applications such as folding.

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