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MMart43
Beginner
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D915GAG Power Supply specs

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Does anyone know what the maximum ATX12V version for a power supply is with a D915GAG motherboard?

I have a board that is using what appears to be an ATX12V v1.x supply with 20-pin connector and works fine.

I'm trying to test another power supply which is an ATX12V v2.0 supply with 24-pin connector. Whilst the onboard LED lights up to indicate power is available, it does not start up.

The only difference I see is that (as per the v2.0 standard) the newer supply is missing the white -5v pin 20, which is present on the other supply. The board shouldn't need it, since I believe it was for ISA bus which this motherboard doesn't have, but who's to say what the board's requirements are. The manual has no version specification info.

It is possible the newer supply is faulty but I don't have any other gear to test with right now. In reality, I want to check if I go out buying a modern store-bought supply, will it work?

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AlHill
Super User
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Please refer to section 2.11 thru 2.11.4 on page 81 and 82

and section 2.8.2.2 on page 72 of the technical specification:

http://downloadmirror.intel.com/15197/eng/D915GAV_D915GAG_TechProdSpec.pdf http://downloadmirror.intel.com/15197/eng/D915GAV_D915GAG_TechProdSpec.pdf

I cannot see why your ATX12V v2.0 should not work, unless it is faulty. I would certainly try another power supply.

Doc

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AlHill
Super User
99 Views

Please refer to section 2.11 thru 2.11.4 on page 81 and 82

and section 2.8.2.2 on page 72 of the technical specification:

http://downloadmirror.intel.com/15197/eng/D915GAV_D915GAG_TechProdSpec.pdf http://downloadmirror.intel.com/15197/eng/D915GAV_D915GAG_TechProdSpec.pdf

I cannot see why your ATX12V v2.0 should not work, unless it is faulty. I would certainly try another power supply.

Doc

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MMart43
Beginner
98 Views

Thanks Al_Hill

I've never seen that manual before. Upon reading and reflection, I'd say you are right.

I believe the 24-pin connector was first defined in the ATX12V 2.0 standard, and is the same standard that removed the -5V pin. Since the motherboard supports the 24-pin connector, it is logical to assume it supports this standard even though it doesn't explicitly say so.

Table 31 in that guide also says pin 20 is not connected, which is even more evidence.

At least now I know a new supply purchase will work should my current ATX12V v1.x fail. I'll hold onto the other supply a little while longer to test in another machine should I come across one

Thanks for your assistance.

AlHill
Super User
98 Views

Glad to help.

Doc

idata
Community Manager
98 Views

Great information provided by Al Hill.

 

 

Allan.
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