If you buy a Pentium 4 or Celeron-predicated system with an Intel chipset, it’s quite likely the chipset it utilizes will be a component of the Intel 845 family. The Intel 845 series might be the most multifarious chipset family that Intel has ever developed. The members of this family offer performance levels congruous for value, mainstream, and performance PC uses. In this article, you will learn about the features of each member of the family and discover which of the chipsets might be the best cull in your next Pentium 4 or Celeron-predicated PC.
Major Features of Intel 845 Series Chipset:
The 845-series chipsets include the following models:
All of these chipsets have the following features in common:
- Hub-based architecture, including a memory controller hub (MCH – North Bridge equivalent) and I/O controller hub (ICH – South Bridge equivalent) and a high-speed dedicated link between the hubs
- Support for 2GB of RAM
- 400MHz FSB
- Onboard audio
- Support for the CNR (communications & networking riser) card for integrated modem and 10/100 Ethernet networking
Beyond these kindred attributes, however, the seven different members of the 845 are quite different. Well, start with an analysis of the Intel 845 chipset, followed by comparisons with other members of the family.
The Founding Father of Intel 845 Chipset:
The current version of the Intel 845 (sometimes referred to as the 845D) differs from the pristine version by offering support for both 200 and 266MHz DDR SDRAM as well as PC-133 SDRAM (the pristine version was developed for use with PC-133 SDRAM only). The Intel 845s 82845 MCH fortifies Socket 478-predicated Celeron or Pentium 4 processors and can fortify up to two DDR SDRAM modules or three standard SDRAM modules (depending upon the motherboard).
When DDR SDRAM is utilized, the 845 fortifies either 200MHz (PC1600) or 266MHz (PC2100) recollection speeds, with a front-side bus (FSB) haste of 400MHz. The 845 fortifies ECC error rectification when parity-checked recollection modules are utilized. It offers an AGP 4x video slot but has no onboard video.
The 845 utilizes the same ICH2 I/O controller hub chip (82801-BA) utilized in the Intel 850 and 850E chipsets, which are Rambus-predicated systems, and additionally appeared in the 815EP, which is for a low-cost SDRAM-predicated system. The ICH2 fortifies ATA/100 hard disk interfacing, rudimental AC97 sound, and four USB 1.1 ports (you can learn more about the ICH2 in Chapter 4 of my book Upgrading and Rehabilitating PCs, 14th Edition).
The features of the 845 make for a solid system, but withal betoken that the 845 is marginal abaft the cool technology curve. If you require USB 2.0 support, enhanced audio, or on-board video, you require to consider other members of the 845 families.
Integrated Video Versions Intel 845GL and 845GV
Cheap chipsets with integrated video are nothing new: the Intel 810 was one of the first to introduce the trend. However, the Intel 810 and 815 series were not designed to work with Pentium 4 or Celeron 4 processors and did not provide high-quality 3D graphics. Providing affordable 3D integrated video for Pentium 4 and Celeron-based systems, Intel has created two low-end versions of 845, 845GL, and 845GV.
The 845GL supports the same memory types and FSB speeds as the original 845, while the 845GV supports SDRAM and DDR memory, but with FSB speeds of up to 533MHz. The GL or GV versions do not support ECC error correction, and both replace ICH2 with the new ICH4 I / O control hub. Great ICH4 development.
over ICH2 support for ICH4s for six USB ports 2.0. Therefore, ICH4 chipsets are better platforms for users with more USB 1.1 devices (USB 2.0 supports more USB devices better than USB 1.1) or with HiSpeed USB devices (USB 2.0) such as -Burner CDs or hard drives. Although both GL and GV chipsets use ICH4, the GV version offers improved 20-bit audio (offers real-world audio output) with better audio quality.
Both the GL and GV models use 32MB of video RAM system for 128MB systems up to 255MB of RAM system, and 64MB for systems with 256MB or more system RAM. Both chipsets support integration into LCDs and flat-panel TVs and CRT monitors. These chipsets support Intels Extreme Graphics Architecture to improve 3D performance. The techniques built into this art will be discussed later in this article.
Intel Extreme Graphics Architechture
845-series chipsets with integrated video (845G-series models) support Intel incipient Extreme Graphics Architecture, which fortifies 3D graphics and features four technologies to ameliorate 3D rendering speed and quality:
- Rapid Pixel and Texel Rendering Engine uses pipelines to bypass 2D and 3D functionality provides 8x data compression to improve memory bandwidth usage and includes a multi-line 3D application repository.
- Zone allocation reduces memory bandwidth requirements by separating the frame bar into rectangular areas, filtering triangles into memory by location, and processing each location in memory.
- Dynamic Video Memory Technology controls the allocation of memory between display, programs, and the operating system according to the memory requirements of the operating systems
Smart Memory Management improves memory communication, buffer implementation, and memory efficiency.
While Extreme Graphics Architecture amends 3D rendering compared to Intel’s earlier integrated video chipsets, the 810 and 815-series chipsets, which had no 3D functions at all, its performance and features still lag behind even current mid-range video chipsets from Nvidia and ATI. Extreme Graphics Architecture lacks hardware Transform and Lighting (T&L) features, a feature required by some of today’s most popular games, and offers frame rates which, at best, are about the caliber of the low-end Nvidia GeForce 2 MX 200.
Thus, while you can play an infrequent game with the G-series systems with integrated video, if you optate earnest gameplay, you’re much better off with one of the 845 models which fortification AGP 4x and DDR333 recollection such as the 845GE or 845PE.
Which 845 Chipset is Fast?
In a survey of recent reviews from noted hardware review sources, it’s clear that the 845PE and GE chipsets are the most expeditious members of the family, thanks in astronomically immense part to fortify for DDR333 recollection and a 533MHz FSB haste.
The 845PE and GE are identical except the GE additionally include integrated video, which sanctions a lower cost system to be constructed (no separate video card is required). The integrated video in the 845GE is not quite as expeditious as a separate AGP 4x card, but the integrated video can be incapacitated and superseded by an AGP 4x card for more preponderant performance if desired.
The 845 chipset family from Intel offers several performance features, no matter what app you want. Motherboards using the various 845 family members are available at Intel and other major mother board vendors.
This Article is Written by the Issue is Real Team.