BFG GeForce 8800 GTX OC - PSU Needs?

[Nikira]

I'm planning on purchasing this card:
BFG GeForce 8800 GTX OC 768MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail
I'm slightly worried that my PSU will not be able to handle it. I have an OCZ ModStream 520 (Peak: 620) watt PSU, with a v12 rail (28amp combined).

I've asked this question a few times and the answers have been promising but I thought I'd go ahead and ask in this section of the forum and see what the buffs think.
Thanks

 

[chaparral]

There be no problem with your 520watt psu running a single 8800gtx....

http://techreport.com/reviews/2006q4/geforce-8800/index.x?pg=16



I be running my 8800gtx on my shuttle 350watt for now..

 

[Nikira]

Great! What about the 12v rail though? I've seen a few posts mention that a GTX requires a minimum 30amps. I only have 28!

 

[LoadsaMoney]

Should be ok, 30a is over-estimated.

 

[Nikira]

Excellent! That's great to hear! Does anyone know whether the BFG comes with a molex to PCI-E converter? I only have one PCI-E lead.

 

[spinna]

would my tagan 480w PSU be ok to power this beast? its 28A as well, or would it be advisable to buy a bigger PSU?

yes the GTX comes with 2x molex to PCI-E converters , ( i would have to use both with my psu)

 

[muon]

Straght from BFG's site, http://www.bfgtech.com/8800GTXOC_768_PCIe.html

Minimum System Requirements
>> 1GB of system memory
>> CD-ROM drive
>> 50MB of available hard disk drive space for basic driver installation
>> Microsoft Windows XP (32-bit) operating system
>> A PCI Express-compliant motherboard with an available PCI Express x16 slot
>> A vacant slot below the PCI Express x16 slot. The graphics card physically occupies two slots
>> A 475W PCI Express-compliant system power supply with a combined 12V current rating of 32A or more*
>> Two 6-pin PCI Express supplementary power connectors
-or-
>> Four 4-pin Molex power connectors

* Minimum system power requirement based on a typical PC configured with an Intel® Core™2 Extreme X6800 processor

 

[Nikira]

Straght from BFG's site, http://www.bfgtech.com/8800GTXOC_768_PCIe.html

Minimum System Requirements
>> 1GB of system memory
>> CD-ROM drive
>> 50MB of available hard disk drive space for basic driver installation
>> Microsoft Windows XP (32-bit) operating system
>> A PCI Express-compliant motherboard with an available PCI Express x16 slot
>> A vacant slot below the PCI Express x16 slot. The graphics card physically occupies two slots
>> A 475W PCI Express-compliant system power supply with a combined 12V current rating of 32A or more*
>> Two 6-pin PCI Express supplementary power connectors
-or-
>> Four 4-pin Molex power connectors

* Minimum system power requirement based on a typical PC configured with an Intel® Core™2 Extreme X6800 processor

The bold text is worrying. As I stated before, I only have 28A. I'm running a C2D 6400 @ 3200mhz.

 

[chaparral]

The bold text is worrying. As I stated before, I only have 28A. I'm running a C2D 6400 @ 3200mhz.

Even my Shuttle 350watt PSU has 34amps on the 12+volt rails....(two 17amp rails) (i think )

 

[masslac]

would my tagan 480w PSU be ok to power this beast? its 28A as well, or would it be advisable to buy a bigger PSU?

The Tagan will be fine.

 

[cuke2u]

Hi, when it says combined it actually means the output from the PCI-E connectors and the slot the card goes into. Also that figure is the MAX power consumption. If you are in XP/Vista using 2d it would be a lot less...
ChrisC

 

[Nikira]

So I should be ok, regardless of my 28A?

Sorry for all the questions, it is just that I want to make sure that when I spend £400 on graphics card that is all I have to spend. If the card arrives and it doesn’t work, I’m screwed.

 

[spinna]

So I should be ok, regardless of my 28A?

im in the same boat as you , ive been thinking of getting a GTS then get the G90 when it comes out.
i need to measure my case to see if the GTX will even fit in first . its a huge card

 

[Nikira]

I will just have to face the situation, buy the card, and hope for the best. If anyone knows whether a 28A PSU will work because they own one themselves, then please tell!

 

[cuke2u]

Hi, I run a X1900XT-X which is also rated at 30amps. I run it on a Antec NeoHE 550 watt, have done for a long time now. My 12v is 18amps, plays Farcry at 1920x1600 with all settings at very high - Doesn't miss a beat...
ChrisC

 

[Sir Random]

Hi, when it says combined it actually means the output from the PCI-E connectors and the slot the card goes into.

No, it's the actual PSU which must have a combined 12V current rating of 32A or more. It's nothing to do with combining the mobo's card slot and power connectors.

I run it on a Antec NeoHE 550 watt, have done for a long time now. My 12v is 18amps

Your PSU has 3 12v rails, each giving 18A, which gives you a combined 12v current rating of 36A for any 2 rails.