EPS12V to ATX GES Conversion Cable

FAQ and Order Form

What is ATX GES?

ATX GES is a power supply form factor. This form factor was originally developed for AMD’s Athlon MP dual processor motherboards. This form factor was required due to the increased power demands of the Athlon MP processor.

Who uses it?

The majority of the power supplies today utilizes the EPS12V form factor, which is similar to the original ATX12V form factor that everybody utilized. The ATX GES form factor is used primarily by AMD Athlon MP dual processor motherboards. Please check with your motherboard manual to see if you require an ATX GES form factor power supply.

As of 6/9/03, Tyan Thunder K7X (S2468) and Tyan Thunder K7 (S2462) motherboards utilize ATX GES.

What will happen if I use an EPS12V power supply in a motherboard that requires ATX GES or vice versa?

1) Motherboard will not power up

2) The connection may cause a short circuit and burn out your motherboard and/or power supply

How do we tell if our power supply is ATX GES compliant?

First check the power supply label to see if it specifies whether the power supply is ATX, EPS12V, or ATX GES. If the power supply label does not specify which form factor it follows, look for the baseboard connector. The baseboard connector is usually the biggest connector leading from the power supply and is usually labeled P1.

The regular ATX form factor is easy to identify because the baseboard connector has only twenty pins. However, both the ATX GES and EPS12V have twenty-four pin connectors. Therefore, to differentiate between ATX GES and EPS12V connectors, you will have to use the color wiring schemes below.

ATX GES Form Factor			EPS12V Form Factor			ATX Form Factor
P1 Baseboard Power Connector			P1 Baseboard Power Connector			P1 Baseboard Power Connector
Pin	Signal	18 AWG Color	Pin	Signal	18 AWG Color	Pin	Signal	18 AWG Color
1	5V	Red	1	+3.3 VDC	Orange	1	+3.3 VDC	Orange
2	5V	Red	2	+3.3 VDC	Orange	2	+3.3 VDC	Orange
3	Ground	Black	3	COM	Black	3	COM	Black
4	Ground	Black	4	+5 VDC	Red	4	+5 VDC	Red
5	PS-ON	Green	5	COM	Black	5	COM	Black
6	Ground	Black	6	+5 VDC	Red	6	+5 VDC	Red
7	+3.3V	Orange	7	COM	Black	7	COM	Black
8	+3.3V	Orange	8	PWR OK	Gray	8	PWR OK	Gray
9	Ground	Black	9	5 VSB	Purple	9	5 VSB	Purple
10	Ground	Black	10	+12 V2	Yellow	10	+12 V2	Yellow
11	+12 V	Yellow	11	+12 V2	Yellow	11	+3.3 VDC	Orange
12	+12 V	Yellow	12	+3.3 VDC	Orange	12	-12 VDC	Blue
13	5V	Red	13	+3.3 VDC	Orange	13	COM	Black
14	5V	Red	14	-12 VDC	Blue	14	PS_ON	Green
15	Ground	Black	15	COM	Black	15	COM	Black
16	5Vsb	Purple	16	PS_ON	Green	16	COM	Black
17	-12V	Blue	17	COM	Black	17	COM	Black
18	Ground	Black	18	COM	Black	18	-5 V	White
19	+3.3V	Orange	19	COM	Black	19	+5 VDC	Red
20	+3.3V	Orange	20	Reserved (-5 V in ATX)	N.C.	20	+5 VDC	Red
21	+3.3V	Orange	21	+5 VDC	Red
22	Ground	Black	22	+5 VDC	Red
23	Ground	Black	23	+5 VDC	Red
24	+12 V	Yellow	24	COM	Black

Processor Power Connector			Processor Power Connector
Pin	Signal	18 AWG Color	Pin	Signal	18 AWG Color
1	5V	Red	1	COM<