Asus Republic of Gamers Thunderbolt Xonar Audio / Bigfoot Killer NIC-E2100 LAN PCI Express x1 Combo Card. Combining the best of technology, Xonar audio high performance and NPU (Network Processing Unit) dedicated in a single PCIe card, the Asus ROG ThunderBolt has been designed specifically for professional players. The Xonar is tuned for stereo earphones, while the NPU removes all network management CPU, which means that 100% of the system resources are dedicated to the game that is being played.

Features: 
Built-in 2-Chanel high Qualtiy DAC/ADC
-Output Signal-to-Noise Ratio (A-Weighted): 116 dB
-Output THD+N at 1kHz: 105 dB
-C-Media 6631 audio processor (Max. 192 kHz/24-bit)
-TI 6120A2 high fidelity headphone amplifier
-Digital-to-Analog Converter: 120 dB (Max. 192kHz/24-bit)
-Analog-to-Digital Converter: 114 dB (Max. 192kHz/24-bit)
-Supports 3 Headphone impedance Gain Modes (up to 300Ohms)
-Fine-tuned Game Genre EQ Profiles
-Xear Surround Headphone
-Xear SigFX
-Equalizer, Environment Effects, FlexBass, Smart Volume, Virtual SPeaker Shifter
-DS3D GX 1.0, OpenAL
Killer E2100 dedicated network processing unit (NPU)
- Advanced Game Detect™
- Visual Bandwidth Control™
- Application Blocking
- Online Gaming PC Monitor™
- Bandwidth Tester
- Game Networking DNA™
- 10/100/1000Mbps GIGALAN


Specifications:
Brand: ASUS
Model: THUNDERBOLT by XONAR (BigFoot Killer NIC-E2100 Xonar Combo Card)
Interface: PCI Express x1
Chipset Manufacturer: INTEL
NPU (Network Processing Unit): BigFoot Killer NIC-E2100
Ports:
Line-In: 1
Line-Out: 1
SPDIF Out: 1
RJ-45: 1