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Communication signaling technique
Quad data rate (QDR, or quad pumping) is a communication signaling technique wherein data are transmitted at four points in the clock cycle: on the rising
Quad_data_rate
Type of computer memory that transfers data using QDR
Quad data rate (QDR) SRAM is a type of static RAM computer memory that can transfer up to four words of data in each clock cycle. Like double data-rate
Quad_data_rate_SRAM
Method of computer bus operation
GDDR5 SDRAM and GDDR6 SDRAM List of interface bit rates Pumping (computer systems) Quad data rate Hennessy, John L.; Patterson, David A. (2007). Computer
Double_data_rate
Type of synchronous graphics random-access memory
Just like GDDR5X it uses QDR (quad data rate) in reference to the write command clock (WCK) and ODR (Octal Data Rate) in reference to the command clock
GDDR6_SDRAM
Frequency at which a CPU chip or core is operating
performance of the computer regardless of clock rate. Crystal oscillator frequencies Double data rate Quad data rate Pulse wave Instructions per second Moore's
Clock_rate
Type of high performance DRAM graphics card memory
Graphics Double Data Rate 5 Synchronous Dynamic Random-Access Memory (GDDR5 SDRAM) is a type of synchronous graphics random-access memory (SGRAM) with
GDDR5_SDRAM
Factor influencing processor clock speed
bus frequency for processors that use dual-data rate (DDR) buses (AMD Athlon and Duron) and quad-data rate buses (all Intel microprocessors starting from
CPU_multiplier
Data transfer channel connecting parts of a computer
more conductors than the minimum of one used in 1-Wire and UNI/O. As data rates increase, the problems of timing skew, power consumption, electromagnetic
Bus_(computing)
advent of double data rate synchronous dynamic RAM or DDR SDRAM, the data was transmitted on both rising and falling edges. However, quad-pumping has been
Pumping_(computer_systems)
Intel bus for connecting CPU and I/O chipset
isochronous data transfer capabilities. DMI replaced FSB (Front-Side Bus) which was eliminated in 2009. DMI 1.0, introduced in 2004 with a data transfer rate of
Direct_Media_Interface
Network standard
association. Original names for speeds were single-data rate (SDR), double-data rate (DDR) and quad-data rate (QDR) as given below. Subsequently, other three-letter
InfiniBand
Computer memory architecture
multi-channel memory architecture is a technology that increases the data transfer rate between the DRAM memory and the memory controller by adding more channels
Multi-channel memory architecture
Multi-channel_memory_architecture
Computer bus standard
was an asynchronous bus that accommodated devices with various transfer rates while maintaining a maximum throughput. It had 20 address lines so it could
Multibus
Topics referred to by the same term
Quad data rate, a communication signaling technique InfiniBand, a computer network communications link used in high-performance computing Quad Data Rate
QDR
QA—Quality assurance QC—Quality control QC—Quick Charge QDR—Quad Data Rate QEMU—Quick Emulator QFP—Quad Flat Package QIF—Quicken Interchange Format QoS—Quality
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Type of computer memory
read/write port, double data rate I/O. Quad Data Rate SRAM – synchronous, separate read and write ports, quadruple data rate I/O. Single-stack SRAM 2
Static_random-access_memory
NASA supercomputer at Ames Research Center/NAS
with 12,800 Intel Xeon quad-core E5472 Harpertown processors connected with more than 20 miles of InfiniBand double data rate (DDR) cabling. With the
Pleiades_(supercomputer)
Specification for expansion and memory cards
in 2009, and removed from their website in 2018. List of interface bit rates "NEWCARD Reborn As 'ExpressCard'". Archived from the original on 2008-11-20
ExpressCard
of data memory 24-pin DIP Introduced April 1, 1972 Clock rate 500 kHz (8008-1: 800 kHz) 0.05 MIPS Bus width: 8 bits (triple-multiplexed address/data due
List_of_Intel_processors
Symbol rate measurement in telecommunications
rate, which is one of the components that determine the speed of communication over a data channel. It is the unit for symbol rate or modulation rate
Baud
Synchronous serial communication interface
has same abbreviation as Quad SPI described in § Quad SPI) is a type of SPI controller that uses a data queue to transfer data across an SPI bus. It has
Serial_Peripheral_Interface
Processor family
dual-, and quad-core microprocessors based on the Core microarchitecture. The single- and dual-core models are single-die, whereas the quad-core models
Intel_Core_2
Server computer
Port aggregator Mellanox 2401G and 4001F/Q - InfiniBand Dual Data Rate or Quad Data Rate modules for High-performance computing Infiniscale 4: 16 port
Dell_M1000e
Microprocessor with more than one processing unit
dual-core or quad-core). Each core reads and executes program instructions, specifically ordinary CPU instructions (such as add, move data, and branch)
Multi-core_processor
Describes approximate behavior of a function
f(x)=\Omega (g(x))\quad } as x → ∞ {\displaystyle \quad x\to \infty \quad } if lim sup x → ∞ | f ( x ) g ( x ) | > 0 . {\displaystyle \quad \limsup _{x\to
Big_O_notation
on the Enhanced Pentium M microarchitecture; as well as its Core 2 (Duo/Quad/Extreme), Core i3, Core i5, Core i7, Core i9, Core M (m3/m5/m7), Core 3,
List of Intel Core desktop processors
List_of_Intel_Core_desktop_processors
Algebraic expansion of powers of a binomial
quad 1\\1\quad 2\quad 1\\1\quad 3\quad 3\quad 1\\1\quad 4\quad 6\quad 4\quad 1\\1\quad 5\quad 10\quad 10\quad 5\quad 1\\1\quad 6\quad 15\quad 20\quad
Binomial_theorem
Marketing company
Quad is an American marketing services company headquartered in Sussex, Wisconsin. It provides a range of print and marketing services that support physical
Quad_(company)
Computer hardware device
on both the transmitting and receiving side: Voltage level Baud rate Parity bit Data bits size Stop bits size Flow control For the voltage level, two
Universal asynchronous receiver-transmitter
Universal_asynchronous_receiver-transmitter
Family of central processing unit models
rest of the Regor line. The triple-core Rana is derived from the Propus quad-core design, with one core disabled. In some cases, the Phenom II Deneb die
Athlon_II
Series of CPUs by AMD
and quad cores (codenamed Agena) to the AMD Phenom X4 9000 series. The first processor in the family was released in 2007. AMD considers the quad core
AMD_Phenom
distances, and other overhead in data link layer protocols etc. The maximum goodput (for example, the file transfer rate) may be even lower due to higher
List_of_interface_bit_rates
Microprocessor microarchitecture by AMD
at one quarter of the external data frequency, as opposed to one half that of DDR. However, since the command clock rate in DDR2 is doubled relative to
AMD_10h
City in Illinois, United States
one of the Quad Cities along with neighboring Moline and East Moline in Illinois and the cities of Davenport and Bettendorf in Iowa. The Quad Cities metropolitan
Rock_Island,_Illinois
Statistical test for multiple comparisons
{\displaystyle \ \alpha ~\quad } the Type I error rate, or the probability of rejecting a true null hypothesis; k {\displaystyle \ k~\quad } the number of sub-populations
Tukey's_range_test
Speed at which a chemical reaction takes place
physical chemistry that concerns how rates of chemical reactions are measured and predicted, and how reaction-rate data can be used to deduce probable reaction
Reaction_rate
Memory cell capable of storing more than a single bit of information
MOSFETs required to store the same amount of data as single-level cells. Triple-level cells (TLC) and quad-level cells (QLC) are versions of MLC memory
Multi-level_cell
First practical, commercially successful analog recording video tape
(width-wise) across the tape at a rate of 14,386 RPM (for 960 recorded stripes per second) for NTSC 525 lines/30fps-standard quad decks and at 15,000 RPM (for
Quadruplex_videotape
Family of AMD multi-core 45 nm processors
batch of triple- and quad-core processors were released on February 9, 2009. Dual-processor systems require Socket F+ for the Quad FX platform. The next-generation
Phenom_II
Server and workstation processor line by AMD
W First release: April 22, 2003 Clock rate: 1.4–2.4 GHz (x40 – x50) CPU steppings: E4 L1 cache: 64 + 64 KB (data + instructions) L2 cache: 1024 KB, full
Opteron
Light off-road vehicle
all-terrain vehicle (ATV), also known as a light utility vehicle (LUV), a quad bike or quad (if it has four wheels), as defined by the American National Standards
All-terrain_vehicle
American ultralight aircraft
The Quad City Challenger is a family of one and two seats-in-tandem, pusher configuration, tricycle landing gear ultralight aircraft that is designed and
Quad_City_Challenger
Public university near Camarillo, California, U.S.
sections: North Quad and South Quad. In 2012, Del Norte and Madera halls were opened in the North Quad; some of the buildings in the North Quad are still uninhabited
California State University Channel Islands
California_State_University_Channel_Islands
Financial model
market data. The affine class of term structure models implies the convenient form that log bond prices are linear functions of the spot rate (and potentially
Affine_term_structure_model
Commonly used display resolutions
1136 × 640 pixels, which also has no official acronym. QuadVGA (also labelled as Quad VGA or Quad-VGA[failed verification]) is a non-standard term used
Display_resolution_standards
Mobile processor from Intel
is sold in varying configurations such as Core 2 Solo, Core 2 Duo, Core 2 Quad, Pentium and Celeron. During development, Penryn was the Intel code name
Penryn_(microprocessor)
Class of statistical models
1,\quad \sigma _{l}^{2}\sim \pi (\sigma ^{2})\propto 1/\sigma ^{2},\quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad l=1
Nonlinear_mixed-effects_model
Computer data storage products company
Tandberg Data is a data storage brand specializing in tape and removable disk backup solutions, particularly based on LTO and RDX technologies. The Tandberg
Tandberg_Data
Nuclear power plant in Illinois
Quad Cities Generating Station is a two-unit nuclear power plant located near Cordova, Illinois, United States, on the Mississippi River. The two General
Quad Cities Nuclear Generating Station
Quad_Cities_Nuclear_Generating_Station
Measurement of algorithmic bias
{\displaystyle P(R=r\ |\ A=a)=P(R=r\ |\ A=b)\quad \forall r\in R\quad \forall a,b\in A} This means that the classification rate for each target classes is equal for
Fairness_(machine_learning)
Mathematical technique for manipulating signals
The data rate of I/Q is largely independent to the frequency of the signal being modulated. I/Q data can be generated at a relatively slow rate (e.g
In-phase and quadrature components
In-phase_and_quadrature_components
Series of CPUs by AMD
September 23, 2003 Clock rate: 2200 MHz (FX-51, C0), 2400 MHz (FX-53, C0 and CG) Stepping level: CG L1 cache: 64 + 64 kB (data + instructions) L2 cache:
Athlon_64
Intel processor microarchitecture
Kentsfield is the code name of the first Intel desktop Core 2 Quad and quad-core Xeon CPUs, released on November 2, 2006. The top-of-the-line Kentsfields
Kentsfield_(microprocessor)
Line of CPUs produced by Intel
6 MB. Core 2 also introduced a quad-core performance variant to the single- and dual-core chips, branded Core 2 Quad, as well as an enthusiast variant
Intel_Core
Measurement of a signal at discrete time intervals
quadrature components and I/Q data Sample rate conversion Digitizing Sample and hold Beta encoder Kell factor Bit rate Normalized frequency For example
Sampling_(signal_processing)
Modular communications interface
the data rate to double without doubling the line rate. 16GFC doesn't really use 16 Gbit/s signaling anywhere. It uses a 14.025 Gbit/s line rate to achieve
Small_Form-factor_Pluggable
System-on-a-chip designed by Apple Inc.
45 nm ARM Cortex-A9 CPU with a clock rate of 1 GHz, and a quad-core 32 nm PowerVR SGX543MP4 GPU with a clock rate of 250 MHz. Compared to the A5, the memory
Apple_A5X
Computer expansion bus standard
rate of 1064 MB/s. The PCI Express bus has the potential to perform better than the PCI-X bus in cases where multiple devices are transferring data simultaneously
PCI_Express
Public university in Macomb, Illinois, US
presence in the Quad Cities spans more than 40 years. In Fall 1960, the university offered its first undergraduate course in the Quad Cities. In 2016
Western_Illinois_University
Data processing hardware by Nvidia
Nvidia BlueField is a line of data processing units (DPUs) designed and produced by Nvidia. Initially developed by Mellanox Technologies, the BlueField
Nvidia_BlueField
American mutual insurance company
insurers". Quad City Times. Quad City Times. Retrieved December 18, 2014. Patane, Matthew (June 20, 2014). "Wellmark seeks insurance rate increases".
Wellmark Blue Cross Blue Shield
Wellmark_Blue_Cross_Blue_Shield
Distribution function associated with the empirical measure of a sample
{n}}({\widehat {F}}_{n}-F)-G_{F,n}\right\|_{\infty }<\infty ,\quad {\text{a.s.}}} Alternatively, the rate of convergence of n ( F ^ n − F ) {\displaystyle {\sqrt
Empirical distribution function
Empirical_distribution_function
3G mobile telecommunications protocols
demonstrate these data rates. The maximum data rates given in the table are physical layer data rates. Application layer data rate is approximately 85%
High_Speed_Packet_Access
= Quad inverter, plus a 2-onput NOR gate and a 2-input NAND gate (both can be converted into inverters) Two to eight input logic gates: 4093 = Quad 2-input
List of 4000-series integrated circuits
List_of_4000-series_integrated_circuits
American artillery
and construction of the first operational Abbot Quads commenced circa 1892. The idea behind the Abbot Quad was to have all 16 mortars in the four pits fire
12-inch_coast_defense_mortar
support DDR4-3200 in quad-channel mode while Threadripper PRO CPUs support DDR4-3200 in octa-channel mode. L1 cache: 64 KB (32 KB data + 32 KB instruction)
List_of_AMD_Ryzen_processors
Tablet computer developed by Apple released in 2025
(264 ppi), 500 nits max brightness (typical), 60 Hz refresh rate Graphics Apple-designed quad core Sound Stereo Camera Front: 12 MP, 1080p HD, ƒ/2.4 aperture
IPad_(11th_generation)
2026 Android smartphone by Google
peak brightness at 3000 nits, but the same resolution and 120 Hz refresh rate. The bezels are nearly 10% thinner, although visually, it looks identical
Pixel_10a
City in Illinois, United States
headquartered in Moline. Quad Cities International Airport, Black Hawk College, and the Quad Cities campus of Western Illinois University-Quad Cities are located
Moline,_Illinois
Unit of rotational speed
discs at a precise, constant rate (4.3218 Mbit/s of raw physical data for 1.4112 Mbit/s (176.4 KB/s) of usable audio data) and thus must vary the disc's
Revolutions_per_minute
Proprietary optical disc format developed by Sony for storing digital video
allowing 23 GB of data to be stored on one 12 cm disc – the equivalent to nearly five single-layer DVDs, and a 1x speed data transfer rate of 88 Mbit/s for
Professional_Disc
Average uncertainty in variable's states
redundancy in the form of checksums to protect against errors. The entropy rate of a data source is the average number of bits per symbol needed to encode it
Entropy_(information_theory)
Data deduplication storage system
the rate of Intel technology. In May 2008, Data Domain Corporation announced the DD690, which used quad-core CPUs and could accept data at a rate of 166
Dell_EMC_Data_Domain
Use of multiple antennas in radio
processing, to deliver data rate speedups roughly proportional to the number of antennas at each end. MIMO starts with a high-rate data stream, which is de-multiplexed
MIMO
Brand of microprocessors
support DDR4-3200 in quad-channel mode while Threadripper PRO CPUs support DDR4-3200 in octa-channel mode. L1 cache: 64 KB (32 KB data + 32 KB instruction)
Threadripper
Type of mobile phone
telecommunications, a multi-band device (including (2) dual-band, (3) tri-band, (4) quad-band and (5) penta-band devices) is a communication device (especially a
Multi-band_device
City in Illinois, United States
census. East Moline was incorporated in April 1907. It is one of the five Quad Cities at the confluence of the Rock and Mississippi rivers, along with neighboring
East_Moline,_Illinois
Relation between chemical reaction rate and concentrations of the reactants
CHO ] 1 2 ⋅ {\displaystyle {\ce {[.CH3]\quad \propto \quad [CH3CHO]^{1/2}.}}} The reaction rate equals the rate of the propagation steps which form the
Rate_equation
Canadian real estate company
QuadReal Property Group (QuadReal) is a Canadian company headquartered in Vancouver that invests, operates, and develops real estate. It is wholly owned
QuadReal_Property_Group
Digital signal resampling method
factor of M Upsampling requires a lowpass filter after increasing the data rate, and downsampling requires a lowpass filter before decimation. Therefore
Upsampling
Function used in signal processing
006947368. {\displaystyle a_{0}=0.21557895;\quad a_{1}=0.41663158;\quad a_{2}=0.277263158;\quad a_{3}=0.083578947;\quad a_{4}=0.006947368.} Other variations
Window_function
System-on-a-chip designed by Apple Inc.
protects the data from the Touch ID fingerprint sensor on the iPhone 5S and iPad mini 3. It has been speculated that the security of the data in the Secure
Apple_A7
Statistical measure
{1}{Nn}}\sum _{i=1}^{N}n_{ij},\quad \quad 1=\sum _{j=1}^{k}p_{j}} Now calculate P i {\displaystyle P_{i}\,} , the extent to which raters agree for the i-th element
Fleiss's_kappa
College of the University of Oxford
belonging to the Crown, known as La Oriole, on the site of what is now First Quad. It is from this property that the college acquired its common name, "Oriel";
Oriel_College,_Oxford
Prototype American Passenger Aircraft
The Beechcraft Model 34 "Twin-Quad" was a prototype airliner designed and built by Beechcraft in the period between World War II and the Korean War. At
Beechcraft_Model_34
Branch of statistics
non-parametric estimate of the cumulative hazard rate function. These estimators require lifetime data. Periodic case (cohort) and death (and recovery)
Survival_analysis
Family of linear error-correcting codes
vector of binary data bits, a → = [ a 1 , a 2 , a 3 , a 4 ] , a i ∈ { 0 , 1 } {\displaystyle {\vec {a}}=[a_{1},a_{2},a_{3},a_{4}],\quad a_{i}\in \{0,1\}}
Hamming_code
City in Illinois, United States
city in Henry County, Illinois, along the Green River. It is part of the Quad Cities metropolitan area. The population was 5,045 at the 2020 Census. The
Colona,_Illinois
City in Iowa, United States
the 2020 census. Bettendorf is one of the five cities that comprise the Quad Cities region along the Mississippi River. It is located adjacent to Davenport
Bettendorf,_Iowa
Enhanced 3G mobile telecommunications standard
demonstrate these data rates. The maximum data rates given in the table are physical layer data rates. Application layer data rate is approximately 85%
Evolved High Speed Packet Access
Evolved_High_Speed_Packet_Access
Android smartphone series made by Xiaomi
quad cameras, 6,000mAh battery". Gizmochina. Retrieved 2022-05-25. Sudarshan (2021-08-18). "Redmi 10 launched with MediaTek Helio G88 SoC, 50MP quad-camera
Redmi_10
WiFi option
proportion of their data rate (see Alamouti's code). Moreover, there exist quasi-orthogonal STBCs that achieve higher data rates at the cost of inter-symbol
Space–time_block_code
Brand name; multi-GPU technology by Nvidia
differences in the PCB tracing allowed clock rates to go up from 400 MHz to 650 MHz and thus the data rates along with that. With the increased bus width
Scalable_Link_Interface
designated as MCST-4R. implements the SPARC V9 instruction set architecture (ISA) quad-core core specifications: in-order, dual-issue superscalar 7-stage integer
MCST-R1000
2007 smartphone by Apple
not need a stylus. The iPhone featured quad-band GSM cellular connectivity with GPRS and EDGE support for data transfer, and it used continuous internet
IPhone_(1st_generation)
Animal theme park in France
visited Le Pal in 1998. There are many attractions and shows including : Yukon Quad, a launched roller coaster, built by Intamin (2018). Twist, a spinning roller
Le_Pal
Computer bus interface for storage devices
conductors instead of 40 or 80), native hot swapping, faster data transfer through higher signaling rates, and more efficient transfer through an (optional) I/O
SATA
System on a chip (SoC) designed by Apple Inc.
includes an integrated quad-core PowerVR SGX554MP4 graphics processing unit (GPU) running at 300 MHz[citation needed] and a quad-channel memory subsystem
Apple_A6X
System-on-a-chip designed by Apple Inc.
packaged with 2 GB RAM. The A8 CPU has a per-core L1 cache of 64 KB for data and 64 KB for instructions, an L2 cache of 1 MB shared by both CPU cores
Apple_A8
System for digitally encoding audio signals
sequence of single-bit values at a sampling rate of 2.8224 MHz. This is 64 times the CD audio sampling rate of 44.1 kHz, but with 1-bit samples instead
Direct_Stream_Digital
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