question: Why are there many gpu manufacturers (zotac, Asus, msi...) but onlz 2 pc CPU manufacturers?
comment: They're graphics card manufacturers, not GPU manufacturers. For the GPU the two largest manufacturers are nVidia and AMD, it's pretty much like with CPU's. They develop and create the GPU. Third party graphics card manufacturers can then make a deal with Nvidia to use their GPU. The GPU design can't be changed, but everything else that's on a graphics card, such as ram or voltage controllers. Besides that, they can increase the MHz of the GPU. If you buy a CPU you already buy the chip itself. There's pretty much nothing, besides overclocking, that a 3rd party manufacturer could change. And Intel and AMD rather sell their own products. I must say though that this only applies for the Desktop/Laptop market. When it comes to other things, such as smartphones, the list of actual GPU and CPU manufacturers significantly increases.
passages: These 1990s video cards were Number Nine's flagship cards of their day (the Imagine 128 and 128 Series 2 were very expensive). None required a heatsink on the GPU. The original Imagine 128 was introduced in 1994. The Revolution IV was introduced in 1998.
   In addition to the above chipset, ATI struck a deal in 2005, with CPU and motherboard manufacturers, particularly Asus and Intel, to create onboard 3D Graphics solutions for Intel's range of motherboards released with their range of Intel Pentium M-based desktop processors, the Intel Core and Intel Core 2 processors, the D101GGC and D101GGC2 chipset (codenamed ""Grand County"") based on the Radeon Xpress 200 chipset. However, high-end boards with integrated graphics processor (IGP) still used Intel GMA integrated graphics processors. The deal with Intel ended with the purchase of ATI by AMD in 2006, with Intel announcing SiS IGP chipset (D201GLY chipset, codenamed ""Little Valley"") for entry-level desktop platform, replacing the ""Grand County"" series chipsets.
   BULLET::::- HP uses MXM for most of its Elitebook business series (15–17.3") and workstation blades with a Q3000M GPU, with a K3100M due in February 2014 (outdated information 2018-04-16). Modern Elitebooks are using completely standardized cards, while in the past they were proprietary. HP also used MXM on the Firebird HTPC and HDX Dragon.
   Many PC manufacturers signed up as PS/2 licensees. (Apricot, who had lost badly by persevering with their "better PC than IBM" strategy up until this time, was one of them, but there were many others.) Many others decided to hold off before committing themselves. Some major manufacturers, known as the Gang of Nine, decided to group together and decide on a bus type that would be open to all manufacturers, as fast as or faster than IBM's Microchannel, and yet still retain backward compatibility with ISA.
   Very early on in PC history, some companies introduced their own XT-compatible chipsets. For example, Chips and Technologies introduced their 82C100 XT Controller which integrated and replaced six of the original XT circuits: one 8237 DMA controller, one 8253 interrupt timer, one 8255 parallel interface controller, one 8259 interrupt controller, one 8284 clock generator, and one 8288 bus controller. Similar non-Intel chipsets appeared for the AT-compatibles, for example OPTi's 82C206 or 82C495XLC which were found in many 486 and early Pentium systems. The x86 chipset market was very volatile though. In 1993, VLSI Technology had become the dominant market player only to be virtually wiped out by Intel a year later. Intel has been the uncontested leader ever since. As the "Wintel" platform gained dominance Intel gradually abandoned the practice of licensing its technologies to other chipset makers; in 2010 Intel was involved in litigation related to their refusal to license their processor bus and related technologies to other companies like Nvidia.
   Section::::History.:GPU companies.
  
  Many companies have produced GPUs under a number of brand names. In 2009, Intel, Nvidia and AMD/ATI were the market share leaders, with 49.4%, 27.8% and 20.6% market share respectively. However, those numbers include Intel's integrated graphics solutions as GPUs. Not counting those, Nvidia and AMD control nearly 100% of the market as of 2018. Their respective market shares are 66% and 33%. In addition, S3 Graphics and Matrox produce GPUs.
  
  Modern smartphones are also using mostly Adreno GPUs from Qualcomm, PowerVR GPUs from Imagination Technologies and Mali GPUs from ARM.
  
  Section::::Computational functions.
   BULLET::::- IBM – Cyrix licensee and developer of Blue Lightning 486 line of processors, eventually left compatible chip market
  
  BULLET::::- Rise Technology – after five years of working on the slow mP6 chip (released in 1998), the company closed a year later
  
  BULLET::::- Texas Instruments and SGS-Thomson – licensees of Cyrix designs, eventually left compatible chip market
  
  BULLET::::- Transmeta – transitioned to an intellectual property company in 2005
  
  BULLET::::- United Microelectronics Corporation and Meridian Semiconductor – got out of market after slow 486 compatible missed market window
  
  Section::::Incomplete/unsuccessful projects.
   The S3-based video cards were, in approximate order of introduction:
  
  Section::::Products.:Number Nine Video Cards with heatsinks.
  
  Number Nine's last two graphics cards were the only ones to require heatsinks on the GPU. Both outperformed the Revolution IV.
  
  BULLET::::- The SR9 was Number Nine's last retail card. It used an S3 Savage4 GPU with a small heatsink on the GPU (the SDRAM one with VGA connector is Savage4 LT, the SGRAM one with DVI connector is Savage4 Xtreme).
   A number of manufacturers have released several socketed AMD Mini-ITX motherboards, supporting Socket AM2, Socket AM2+, Socket AM3, Socket FM1, Socket FM2, Socket FM2+, Socket AM1 and Socket AM4 CPUs. Socket AM2+ and AM3 ITX motherboards have integrated motherboard graphics, while discrete graphics or processor integrated graphics are required for other platforms.
  
  Mini-ITX motherboards with integrated AMD CPUs are also released. These motherboards often use mobile CPUs and passive cooling, and feature more powerful integrated graphics compared to their Intel counterparts, which makes them suitable for HTPC.
  
  Section::::Transmeta-based products.
   For some low-power mobile CPUs there is limited video decoding support, while none of the desktop CPUs have this limitation.
  
  Section::::Generations.:Haswell.
  
  On 12 September 2012, Haswell CPUs were announced, with four models of integrated GPUs:
   List of Intel graphics processing units
  
  This page contains information about Intel's GPUs and motherboard graphics chipsets in table form. In 1982, Intel licensed the NEC µPD7220 and announced it as the Intel 82720 Graphics Display Controller.
  
  Section::::First generation.
  
  Intel's first generation GPUs 
  
  Section::::Second generation.
  
  Intel marketed its second generation using the brand Extreme Graphics. These chips added support for texture combiners allowing support for OpenGL 1.3.
  
  Section::::Third generation.
   Before the introduction of Intel HD Graphics, Intel integrated graphics were built into the motherboard's northbridge, as part of the Intel's Hub Architecture. They were known as Intel Extreme Graphics and Intel GMA. As part of the Platform Controller Hub (PCH) design, the northbridge was eliminated and graphics processing was moved to the same die as the central processing unit (CPU).
   The first Socket 7 chipsets to support AGP were the VIA Apollo VP3, SiS 5591/5592, and the ALI Aladdin V. Intel never released an AGP-equipped Socket 7 chipset. FIC demonstrated the first Socket 7 AGP system board in November 1997 as the "FIC PA-2012" based on the VIA Apollo VP3 chipset, followed very quickly by the "EPoX P55-VP3" also based on the VIA VP3 chipset which was first to market.
   Number Nine had a close business relationship with S3 Graphics throughout the 1990s. While the Imagine series GPUs and cards were Number Nine's flagship products, contemporaneously, Number Nine produced a series of less expensive video graphics cards using S3's GPUs. The S3-based cards were usually introduced in groups of three, at three price points below the Imagine cards. They carried the same model name, but different model numbers and GPUs. Except for the SR9, Number Nine's last, best S3 card, none of these video cards had heatsinks on the graphics processing chip (GPU).
   By 2000, only ATI with their comparable Radeon 7xxx series, would remain in direct competition with Nvidia's GeForce 256 and GeForce 2. By the end of 2001, all discrete graphics chips would have hardware T&L. 
   High-performance video card power demands dramatically increased during the 2000s and some high-end graphics cards have power demands that exceed AGP or PCIe slot capabilities. For these cards, supplementary power was delivered through a standard 4-pin peripheral or floppy power connector. Midrange and high-end PCIe graphics cards manufactured after 2004 typically use a standard 6 or 8-pin PCIe power connector directly from the PSU.
  
  Section::::Power supply.:Interchanging PSUs.
   As companies like Dell modified the AT bus design, the architecture was so well entrenched that no single clone manufacturer had the leverage to create a standardized alternative, and there was no compelling reason for them to cooperate on a new standard. Because of this, when the first 386-based system (the Compaq Deskpro 386) hit the market in 1986, it still supported 16-bit slots. Other 386 PCs followed suit, and the AT (later ISA) bus remained a part of most systems even into the late 1990s.
   ATI's initial response to GeForce 256 was the dual-chip Rage Fury MAXX. By using two Rage 128 chips, each rendering an alternate frame, the card was able to somewhat approach the performance of SDR memory GeForce 256 cards, but the GeForce 256 DDR still retained the top speed. ATI was developing their own GPU at the time known as the Radeon which also implemented hardware T&L.
   Computer video cards are produced by various vendors, such as Nvidia, and AMD and ATI. Cards from such vendors differ on implementing data-format support, such as integer and floating-point formats (32-bit and 64-bit). Microsoft introduced a "Shader Model" standard, to help rank the various features of graphic cards into a simple Shader Model version number (1.0, 2.0, 3.0, etc.).
  
  Section::::Hardware support.:Integer numbers.
   In 2013 Francis Bruno from Silicon Spectrum tried to fund an open-source GPU based on a "#9 Ticket To Ride IV" derived design. Started on the crowdfunding platform kickstarter.com, the campaign was unsuccessful as only $13,000 of the requested $200,000 was gathered. Despite this, source code was released under a GPL3 license in August 2014.
  
  Section::::Products.
  
  The first Number Nine graphics cards were ISA bus, pre-VGA standard cards that had no graphics accelerator chips. In the latter 1980s to early 1990s, Number Nine made ISA and MCA bus graphics cards based on Texas Instruments' TIGA coprocessors.
   Beginning in the 1990s, Number Nine made AGP and PCI graphics cards with their own proprietary graphics accelerators (the Imagine line GPUs). Contemporaneously, Number Nine made AGP, PCI, VLB and ISA graphics cards using S3 Graphics' accelerator chips. Their very last AGP card used an Nvidia GPU.
  
  Section::::Products.:Early pre-VGA video cards.
  
  Early cards (no co-processor, pre-1986, pre-VGA standard):
  
  The Revolution series were large, full-length cards that ranged in price from $1995 to $2995 at introduction.
  
  Section::::Products.:TIGA cards.
   Starting from LGA 775, socketed Intel Mini-ITX motherboards have been released by Intel and Zotac. This was followed by LGA 1156 motherboards Starting from LGA 1155, Mini-ITX motherboards have started to become mainstream, with many different manufacturers releasing products. This is partly because almost all Sandy Bridge and Ivy Bridge Intel Celeron, Pentium and Core series CPUs have integrated processor graphics, eliminating the need for motherboard graphics or discrete graphics cards. This trend continues with LGA 1150 and LGA 1151 CPUs.
   BULLET::::- FameG (Fulhua Microelectronics Corp.)
  
  BULLET::::- Freescale Semiconductor
  
  BULLET::::- Frontier Silicon Ltd
  
  BULLET::::- Fujifilm
  
  BULLET::::- HiSilicon
  
  BULLET::::- Horizon Semiconductors
  
  BULLET::::- Imagination Technologies
  
  BULLET::::- Infineon Technologies
  
  BULLET::::- Innova Card
  
  BULLET::::- Intel Corporation
  
  BULLET::::- InvenSense
  
  BULLET::::- Lattice Semiconductor
  
  BULLET::::- Leadcore Technology
  
  BULLET::::- LSI Corporation
  
  BULLET::::- Marvell Technology Group
  
  BULLET::::- MediaTek
  
  BULLET::::- Maxim Integrated Products
  
  BULLET::::- Milkymist
  
  BULLET::::- MIPS Technologies
  
  BULLET::::- Mistletoe Technologies
  
  BULLET::::- MosChip Semiconductor Technology
  
  BULLET::::- MStar Semiconductor
  
  BULLET::::- Naksha Technologies
  
  BULLET::::- Nokia
  
  BULLET::::- NuCORE Technology
  
  BULLET::::- Nufront
  
  BULLET::::- NVIDIA
  
  BULLET::::- NXP Semiconductors (formerly Philips Semiconductors)
  
  BULLET::::- ORSoC, OpenRISC System On Chip
  
  BULLET::::- Open-Silicon
  
  BULLET::::- Palmchip Corporation
  
  BULLET::::- PMC-Sierra
   Due to the limitations of the Mini-ITX design, and the physical size of the LGA 2011 socket, Mini-ITX motherboards with the socket only support a single PCI Express expansion slot, and they require using the narrow-ILM version of the LGA 2011 socket. Despite this, manufacturers have released LGA 2011 based Mini-ITX motherboards.
  
  Also, Mini-ITX motherboards with the LGA 2066 socket have been released, with four SODIMM slots. 
  
  Section::::AMD-based products.
   In the early- and mid-1990s, real-time 3D graphics were becoming increasingly common in arcade, computer and console games, which led to an increasing public demand for hardware-accelerated 3D graphics. Early examples of mass-market 3D graphics hardware can be found in arcade system boards such as the Sega Model 1, Namco System 22, and Sega Model 2, and the fifth-generation video game consoles such as the Saturn, PlayStation and Nintendo 64. Arcade systems such as the Sega Model 2 and Namco Magic Edge Hornet Simulator in 1993 were capable of hardware T&L (transform, clipping, and lighting) years before appearing in consumer graphics cards. Some systems used DSPs to accelerate transformations. Fujitsu, which worked on the Sega Model 2 arcade system, began working on integrating T&L into a single LSI solution for use in home computers in 1995; the Fujitsu Pinolite, the first 3D geometry processor for personal computers, released in 1997. The first hardware T&L GPU on home video game consoles was the Nintendo 64's Reality Coprocessor, released in 1996. In 1997, Mitsubishi released the 3Dpro/2MP, a fully featured GPU capable of transformation and lighting, for workstations and Windows NT desktops; ATi utilized it for their FireGL 4000 graphics card, released in 1997.
  
presuppositions: There are many GPU manufacturers, but few CPU manufacturers.  There are many GPU manufacturerers.
corrections: There are not many GPU manufacturers.  They grapchics card manufacturers, not GPU manufacturers.
raw_presuppositions: There are many GPU manufacturers, but few CPU manufacturers.  There are many GPU manufacturerers.
raw_corrections: There are not many GPU manufacturers.  They grapchics card manufacturers, not GPU manufacturers.