MBASR-X670EPRORS - ASROCK
219.36
Supports AMD Ryzen 7000 Series Processors
14+2+1 Phase Power Design, SPS
4 x DDR5 DIMMs, supports up to 6600+(OC)
1 PCIe 5.0 x16,
2 PCIe 4.0 x1,
1 M.2 Key-E for WiFi
Graphics Output Options: 1 HDMI, 1 DisplayPort
Realtek ALC897 7.1 CH HD Audio Codec, Nahimic Audio
1 Blazing M.2 (PCIe Gen5x4),
3 Hyper M.2 (PCIe Gen4x4),
1 M.2 (PCIe Gen3x2 & SATA3),
6 SATA3
1 USB 3.2 Gen2x2 Type-C (Front),
1 USB 3.2 Gen2 Type-C (Rear),
1 USB 3.2 Gen2 Type-A (Rear),
8 USB 3.2 Gen1 (4 Rear, 4 Front)
Realtek 2.5G LAN
802.11ax Wi-Fi 6E + Bluetooth
Modern and futuristic, with the attractive specifications and perfect balance, the Race Sport (RS) Edition is the evolution of the most popular PRO series motherboard.
Its unique path takes aim at mainstream DIYers that drives an undeniable performance and trustable computing experience without a pricey upgrade.
RaceSport edition, your all-rounder motherboard that fulfills every task and light-loading gaming ? with style and speed!
Optimized VRM Design
Dr.MOS design features the latest SPS (Smart Power Stage) technology. It?s optimized for monitoring current and temperature of each phase, thus delivering smoother and neater power to the CPU with enhanced performance and OC capability.
14+2+1 Power Phase Design
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.
The server grade low loss PCB improves signal integrity, allowing motherboard to support PCIe 5.0 for both graphics card and M.2 SSD, it also improves memory OC potential to deliver the most extreme memory performance.
Optimized VRM Design
The 8 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency, ensures a reliable and long-lasting system while delivering ultimate performance without any compromise.
2oz Copper PCB
2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking.
DDR5 Memory with Protection Circuit
The reinforced DIMM slot is surfaced mounted onto the motherboard to give better physical strength as well as a more stable memory signal, with this superior revolutionary design, it is able to dramatically overclock DRAM module up to insane frequency.
DIY Friendly Design
Due to the unique electrical architecture of DDR5 DIMM, there?s a high risk of damaging the memory module if AC power isn?t disconnected properly during removal or installation. To prevent this, ASRock has implemented a trouble free protection circuit on every DDR5 motherboard, lowers the risk of damaging your memory module.
PCIe 5.0 + Surface-Mount Tech
Compares to conventional DIP style PCIe slot, the SMT type PCIe slot improves signal flow and maximize stability under high speed, a key breakthrough to fully support the lighting speed of the latest PCIe 5.0 standard.
The latest PCI Express 5.0 is capable to perform a breathtaking bandwidth of 128GBps, ready to unleash the full potential of future high end graphic cards.
Blazing OC Tuner
The Blazing OC Tuner allows AM5 CPU to switch between OC mode and PBO(Precision Boost Overdrive) mode when the CPU current hits threshold. Anything above current threshold will engage manual OC mode; if below current threshold then will engage Precision Boost Overdrive mode. This idea is to combine overclocking on all cores and automatic boost on a single core to get the best performance out of your CPU. There is no need to enter BIOS to setup up, you can modify all the settings on time under OS.
Nahimic Audio
Whether you are using headphones, a headset, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio offers you the most engaging listening experience, vibrant and rich with details.
ASRock Graphics Card Holder
Install your heavy graphics card on the holder; connect it to your motherboard and chassis with screws. Flexibly slide up and down to perfectly adjust the height required for your graphics card in place.
POLYCHROME RGB
In addition to the built-in RGB illumination, it also features onboard RGB headers and an addressable RGB header that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.
High Speed M.2 Solution
The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation, with a breathtaking 128GB/s transfer speed, it is ready to unleash the full potential of future ultrafast SSDs.
XXL M.2 Heatsink
The extra large aluminum alloy M.2 heatsink effectively improves heat dissipation to keep those high speed M.2 SSDs as cool as possible, it is able to give better stability while maintaining top performance.
Anti-Drop Screw
Tired of dropping screws or screws missing inside chassis?
The enhanced M.2 heatsink with anti-drop screw design that make sure installation process more easily.
Dragon 2.5 Gb/s LAN
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you?ll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.
Wireless Networking
Wi-Fi 6E 802.11ax
WiFi 6E technology has extended to the whole new 6GHz spectrum band, providing more WiFi capability and giving an even better and faster internet traffic. In addition to deliver higher speeds, the WiFi 6E also enhances the lower latency and supports service levels that are equivalent to 5G networks.
M.2 Key-E Module Cap
SMA cable is easy to loose, this is an unacceptable situation for every users. Now we fixed this issue with a little Key-E module cap.
Front USB 3.2 Gen2x2 Type-C
The latest USB 3.2 Gen2x2 Type-C delivers up to 20 Gbps data transfer rate which is 2x as fast as previous generation, providing a blazing fast data transfer interface with reversible USB Type-C design that fits the connector either way.
EZ Setting
Auto Driver Installer
Optical drive or driver DVD is no longer needed! ASRock motherboard already has its Ethernet driver prepacked in BIOS ROM, once finish installing the operation system, simply follow the instructions and allow ADI to download and install all necessary drivers automatically!
Step1: Install Auto Driver Installer
Step2: ADI will automatically download and install all necessary drivers.
Step3: Done!
BIOS Flashback
Get the most convenient BIOS flashing with just a simple click. Users can easily achieve the latest BIOS support with a USB and power supply, No CPU, RAM or other components required.
Flexible Integrated IO Shield
Unlike most so called pre-mounted I/O shield that is only decorated with fancy color schemes. We reserve more tolerance space and allow IO shield is adjustable when installing, thus fitting chassis perfectly without any mechanical issue.
Specifications
Unique Feature
Superb Productivity
PCIe Gen5 (Graphics, M.2)
Dual Channel DDR5
Rock-Solid Durability
Server-Grade Low-Loss PCB
14+2+1 Power Phase, 60A SPS with Enlarged Heatsink Armor
Flexible Integrated I/O Shield
Ultrafast Connectivity
2.5G LAN, 802.11ax Wi-Fi 6E Module
EZ Update
BIOS Flashback Button
ASRock Auto Driver Installer
EZ Troubleshooter
ASRock Post Status Checker
CPU
Supports AMD Socket AM5 Ryzen 7000 Series Processors
Chipset
AMD X670
Memory
Dual Channel DDR5 Memory Technology
4 x DDR5 DIMM Slots
Supports DDR5 ECC/non-ECC, un-buffered memory up to 6600+(OC)
Max. capacity of system memory: 128GB
Supports Extreme Memory Profile (XMP) and EXTended Profiles for Overclocking (EXPO) memory modules
BIOS
256Mb AMI UEFI Legal BIOS with GUI support
Graphics
Integrated AMD RDNATM 2 graphics (Actual support may vary by CPU)
1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR, HDCP 2.3 and max. resolution up to 4K 120Hz
1 x DisplayPort 1.4 with DSC (compressed), supports HDCP 2.3 and max. resolution up to 4K 120Hz
Audio
7.1 CH HD Audio (Realtek ALC897 Audio Codec)
Nahimic Audio
LAN
2.5 Gigabit LAN 10/100/1000/2500 Mb/s
Dragon RTL8125BG
Supports Dragon 2.5G LAN Software
Smart Auto Adjust Bandwidth Control
Visual User Friendly UI
Visual Network Usage Statistics
Optimized Default Setting for Game, Browser, and Streaming Modes
User Customized Priority Control
Wireless LAN
802.11ax Wi-Fi 6E Module
Supports IEEE 802.11a/b/g/n/ac/ax
Supports Dual-Band 2x2 with extended 6GHz band support
2 antennas to support 2 (Transmit) x 2 (Receive) diversity technology
Supports Bluetooth + High speed class II
Supports MU-MIMO
Slots
CPU:
1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode
Chipset:
2 x PCIe 4.0 x1 Slots (PCIE2 and PCIE3)
1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module
15µ Gold Contact in VGA PCIe Slot (PCIE1)
Storage
CPU:
1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5x4 (128 Gb/s) mode
1 x Hyper M.2 Socket (M2_2, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode
Chipset:
1 x Hyper M.2 Socket (M2_3, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode
1 x M.2 Socket (M2_4, Key M), supports type 2242/2260/2280 SATA3 6.0 Gb/s & PCIe Gen3x2 (16 Gb/s) modes
1 x Hyper M.2 Socket (M2_5, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode
6 x SATA3 6.0 Gb/s Connectors
RAID
Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Connector
1 x SPI TPM Header
1 x Power LED and Speaker Header
1 x RGB LED Header
3 x Addressable LED Headers
1 x CPU Fan Connector (4-pin)
1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)
4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)
1 x 24 pin ATX Power Connector (Hi-Density Power Connector)
1 x 8 pin 12V Power Connector (Hi-Density Power Connector)
1 x 4 pin 12V Power Connector (Hi-Density Power Connector)
1 x Front Panel Audio Connector
2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)
Rear Panel I/O
2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x Optical SPDIF Out Port
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (ReDriver)
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (ReDriver)
4 x USB 3.2 Gen1 Ports
4 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
1 x Line Out Jack (Gold Audio Jack)
1 x Microphone Input Jack (Gold Audio Jack)
Software and UEFI
Software
ASRock Motherboard Utility (A-Tuning)
ASRock Dragon 2.5G LAN Software
ASRock Polychrome SYNC
UEFI
ASRock Full HD UEFI
ASRock Auto Driver Installer
ASRock Instant Flash
Accessories
1 x User Manual
2 x SATA Data Cables
1 x ASRock WiFi 2.4/5/6 GHz Antenna
4 x Screws for M.2 Sockets
1 x Graphics Card Holder
Form Factor
ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm
8 Layer PCB
OS
Microsoft Windows 10 64-bit / 11 64-bit
14+2+1 Phase Power Design, SPS
4 x DDR5 DIMMs, supports up to 6600+(OC)
1 PCIe 5.0 x16,
2 PCIe 4.0 x1,
1 M.2 Key-E for WiFi
Graphics Output Options: 1 HDMI, 1 DisplayPort
Realtek ALC897 7.1 CH HD Audio Codec, Nahimic Audio
1 Blazing M.2 (PCIe Gen5x4),
3 Hyper M.2 (PCIe Gen4x4),
1 M.2 (PCIe Gen3x2 & SATA3),
6 SATA3
1 USB 3.2 Gen2x2 Type-C (Front),
1 USB 3.2 Gen2 Type-C (Rear),
1 USB 3.2 Gen2 Type-A (Rear),
8 USB 3.2 Gen1 (4 Rear, 4 Front)
Realtek 2.5G LAN
802.11ax Wi-Fi 6E + Bluetooth
Modern and futuristic, with the attractive specifications and perfect balance, the Race Sport (RS) Edition is the evolution of the most popular PRO series motherboard.
Its unique path takes aim at mainstream DIYers that drives an undeniable performance and trustable computing experience without a pricey upgrade.
RaceSport edition, your all-rounder motherboard that fulfills every task and light-loading gaming ? with style and speed!
Optimized VRM Design
Dr.MOS design features the latest SPS (Smart Power Stage) technology. It?s optimized for monitoring current and temperature of each phase, thus delivering smoother and neater power to the CPU with enhanced performance and OC capability.
14+2+1 Power Phase Design
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.
The server grade low loss PCB improves signal integrity, allowing motherboard to support PCIe 5.0 for both graphics card and M.2 SSD, it also improves memory OC potential to deliver the most extreme memory performance.
Optimized VRM Design
The 8 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency, ensures a reliable and long-lasting system while delivering ultimate performance without any compromise.
2oz Copper PCB
2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking.
DDR5 Memory with Protection Circuit
The reinforced DIMM slot is surfaced mounted onto the motherboard to give better physical strength as well as a more stable memory signal, with this superior revolutionary design, it is able to dramatically overclock DRAM module up to insane frequency.
DIY Friendly Design
Due to the unique electrical architecture of DDR5 DIMM, there?s a high risk of damaging the memory module if AC power isn?t disconnected properly during removal or installation. To prevent this, ASRock has implemented a trouble free protection circuit on every DDR5 motherboard, lowers the risk of damaging your memory module.
PCIe 5.0 + Surface-Mount Tech
Compares to conventional DIP style PCIe slot, the SMT type PCIe slot improves signal flow and maximize stability under high speed, a key breakthrough to fully support the lighting speed of the latest PCIe 5.0 standard.
The latest PCI Express 5.0 is capable to perform a breathtaking bandwidth of 128GBps, ready to unleash the full potential of future high end graphic cards.
Blazing OC Tuner
The Blazing OC Tuner allows AM5 CPU to switch between OC mode and PBO(Precision Boost Overdrive) mode when the CPU current hits threshold. Anything above current threshold will engage manual OC mode; if below current threshold then will engage Precision Boost Overdrive mode. This idea is to combine overclocking on all cores and automatic boost on a single core to get the best performance out of your CPU. There is no need to enter BIOS to setup up, you can modify all the settings on time under OS.
Nahimic Audio
Whether you are using headphones, a headset, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio offers you the most engaging listening experience, vibrant and rich with details.
ASRock Graphics Card Holder
Install your heavy graphics card on the holder; connect it to your motherboard and chassis with screws. Flexibly slide up and down to perfectly adjust the height required for your graphics card in place.
POLYCHROME RGB
In addition to the built-in RGB illumination, it also features onboard RGB headers and an addressable RGB header that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.
High Speed M.2 Solution
The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation, with a breathtaking 128GB/s transfer speed, it is ready to unleash the full potential of future ultrafast SSDs.
XXL M.2 Heatsink
The extra large aluminum alloy M.2 heatsink effectively improves heat dissipation to keep those high speed M.2 SSDs as cool as possible, it is able to give better stability while maintaining top performance.
Anti-Drop Screw
Tired of dropping screws or screws missing inside chassis?
The enhanced M.2 heatsink with anti-drop screw design that make sure installation process more easily.
Dragon 2.5 Gb/s LAN
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you?ll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.
Wireless Networking
Wi-Fi 6E 802.11ax
WiFi 6E technology has extended to the whole new 6GHz spectrum band, providing more WiFi capability and giving an even better and faster internet traffic. In addition to deliver higher speeds, the WiFi 6E also enhances the lower latency and supports service levels that are equivalent to 5G networks.
M.2 Key-E Module Cap
SMA cable is easy to loose, this is an unacceptable situation for every users. Now we fixed this issue with a little Key-E module cap.
Front USB 3.2 Gen2x2 Type-C
The latest USB 3.2 Gen2x2 Type-C delivers up to 20 Gbps data transfer rate which is 2x as fast as previous generation, providing a blazing fast data transfer interface with reversible USB Type-C design that fits the connector either way.
EZ Setting
Auto Driver Installer
Optical drive or driver DVD is no longer needed! ASRock motherboard already has its Ethernet driver prepacked in BIOS ROM, once finish installing the operation system, simply follow the instructions and allow ADI to download and install all necessary drivers automatically!
Step1: Install Auto Driver Installer
Step2: ADI will automatically download and install all necessary drivers.
Step3: Done!
BIOS Flashback
Get the most convenient BIOS flashing with just a simple click. Users can easily achieve the latest BIOS support with a USB and power supply, No CPU, RAM or other components required.
Flexible Integrated IO Shield
Unlike most so called pre-mounted I/O shield that is only decorated with fancy color schemes. We reserve more tolerance space and allow IO shield is adjustable when installing, thus fitting chassis perfectly without any mechanical issue.
Specifications
Unique Feature
Superb Productivity
PCIe Gen5 (Graphics, M.2)
Dual Channel DDR5
Rock-Solid Durability
Server-Grade Low-Loss PCB
14+2+1 Power Phase, 60A SPS with Enlarged Heatsink Armor
Flexible Integrated I/O Shield
Ultrafast Connectivity
2.5G LAN, 802.11ax Wi-Fi 6E Module
EZ Update
BIOS Flashback Button
ASRock Auto Driver Installer
EZ Troubleshooter
ASRock Post Status Checker
CPU
Supports AMD Socket AM5 Ryzen 7000 Series Processors
Chipset
AMD X670
Memory
Dual Channel DDR5 Memory Technology
4 x DDR5 DIMM Slots
Supports DDR5 ECC/non-ECC, un-buffered memory up to 6600+(OC)
Max. capacity of system memory: 128GB
Supports Extreme Memory Profile (XMP) and EXTended Profiles for Overclocking (EXPO) memory modules
BIOS
256Mb AMI UEFI Legal BIOS with GUI support
Graphics
Integrated AMD RDNATM 2 graphics (Actual support may vary by CPU)
1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR, HDCP 2.3 and max. resolution up to 4K 120Hz
1 x DisplayPort 1.4 with DSC (compressed), supports HDCP 2.3 and max. resolution up to 4K 120Hz
Audio
7.1 CH HD Audio (Realtek ALC897 Audio Codec)
Nahimic Audio
LAN
2.5 Gigabit LAN 10/100/1000/2500 Mb/s
Dragon RTL8125BG
Supports Dragon 2.5G LAN Software
Smart Auto Adjust Bandwidth Control
Visual User Friendly UI
Visual Network Usage Statistics
Optimized Default Setting for Game, Browser, and Streaming Modes
User Customized Priority Control
Wireless LAN
802.11ax Wi-Fi 6E Module
Supports IEEE 802.11a/b/g/n/ac/ax
Supports Dual-Band 2x2 with extended 6GHz band support
2 antennas to support 2 (Transmit) x 2 (Receive) diversity technology
Supports Bluetooth + High speed class II
Supports MU-MIMO
Slots
CPU:
1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode
Chipset:
2 x PCIe 4.0 x1 Slots (PCIE2 and PCIE3)
1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module
15µ Gold Contact in VGA PCIe Slot (PCIE1)
Storage
CPU:
1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5x4 (128 Gb/s) mode
1 x Hyper M.2 Socket (M2_2, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode
Chipset:
1 x Hyper M.2 Socket (M2_3, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode
1 x M.2 Socket (M2_4, Key M), supports type 2242/2260/2280 SATA3 6.0 Gb/s & PCIe Gen3x2 (16 Gb/s) modes
1 x Hyper M.2 Socket (M2_5, Key M), supports type 2260/2280 PCIe Gen4x4 (64 Gb/s) mode
6 x SATA3 6.0 Gb/s Connectors
RAID
Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Connector
1 x SPI TPM Header
1 x Power LED and Speaker Header
1 x RGB LED Header
3 x Addressable LED Headers
1 x CPU Fan Connector (4-pin)
1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)
4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)
1 x 24 pin ATX Power Connector (Hi-Density Power Connector)
1 x 8 pin 12V Power Connector (Hi-Density Power Connector)
1 x 4 pin 12V Power Connector (Hi-Density Power Connector)
1 x Front Panel Audio Connector
2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)
Rear Panel I/O
2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x Optical SPDIF Out Port
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (ReDriver)
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (ReDriver)
4 x USB 3.2 Gen1 Ports
4 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
1 x Line Out Jack (Gold Audio Jack)
1 x Microphone Input Jack (Gold Audio Jack)
Software and UEFI
Software
ASRock Motherboard Utility (A-Tuning)
ASRock Dragon 2.5G LAN Software
ASRock Polychrome SYNC
UEFI
ASRock Full HD UEFI
ASRock Auto Driver Installer
ASRock Instant Flash
Accessories
1 x User Manual
2 x SATA Data Cables
1 x ASRock WiFi 2.4/5/6 GHz Antenna
4 x Screws for M.2 Sockets
1 x Graphics Card Holder
Form Factor
ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm
8 Layer PCB
OS
Microsoft Windows 10 64-bit / 11 64-bit