| Model | GA-EP45T-USB3P(rev. 1.0) | GA-EP45T-UD3LR(rev. 1.1) | GA-EP45-UD3L(rev. 1.1) |
| CPU Type | Socket 775 | Socket 775 | Socket 775 |
| FSB | 1600/1333/1066/800 MHz FSB | 1600/1333/1066/800 MHz FSB | 1600/1333/1066/800 MHz FSB |
| Chipset | Intel P45 Express Chipset | Intel P45 Express Chipset | Intel P45 Express Chipset |
| Memory type | Dual Channel, DDR3 2200+/1333/1066/800 MHz | Dual Channel, DDR3 2200+/1333/1066/800 MHz | Dual Channel, DDR2 1366+/1066/800/667 MHz |
| Memory socket | DDR3 *4 | DDR3 *4 | DDR2 *4 |
| Max. Memory | 16 GB | 16 GB | 16GB |
| Graphics interface | PCI-Express (2.0) x16 | PCI-Express (2.0) x16 | PCI-Express (2.0) x16 |
| PCI-Express X16 (X16) | 2 (1x16 or 2x8) | 1 (1x16) | 1 (1x16) |
| PCI-Express X1 (X2,X4) | 3 (PCI-Ex1) | 4 (PCI-Ex1) | 4 (PCI-Ex1) |
| PCI | 2 | 2 | 2 |
| VGA | N/A | N/A | N/A |
| Storage Interface | 8* Serial ATA 3Gb/s / 1*PATA | 6* Serial ATA 3Gb/s / 1*PATA | 6* Serial ATA 3Gb/s / 1*PATA |
| eSATAII | 2 (by cable) | 1 | 0 |
| RAID Function | SATA RAID 0, 1, 5, 10 | SATA RAID 0, 1, 5, 10 | N/A |
| LAN | GbE LAN(Realtek 8111D Gigabit LAN Controller) | GbE LAN(Realtek 8111C Gigabit LAN Controller) | GbE LAN(Realtek 8111C Gigabit LAN Controller) |
| Audio | HD Audio (Realtek ALC889) | HD Audio (Realtek ALC888) | HD Audio (Realtek ALC888) |
| Codec channel | 8 | 8 | 8 |
| SPDIF IN/OUT | Yes/Yes | Yes/Yes | Yes/Yes |
| IEEE 1394 | 3 | 0 | 0 |
| USB 1.1 | Same as USB 2.0 | Same as USB 2.0 | Same as USB 2.0 |
| USB 2.0 | 12 (4 by cable) | 12 (4 by cable) | 12 (4 by cable) |
| USB 3.0 | 2 | | |
| COM | 1 | 1 | 1 |
| Ultra TPM | Yes | Yes | N/A |
| DualBIOS | Yes | Yes | Yes |
| Thermal Solution | Silent Pipe, Heat Sink | Heat Sink | Heat Sink |
| Form Factor | ATX | ATX | ATX |
| PCB size | 30.5*24.4 CM | 30.5*21.0 CM | 30.5*21.0 CM |