Talk:Radeon HD 4000 series

TeraScale and a lot of redundant content
I moved a lot of stuff from Radeon HD 2000 Series and Radeon HD 3000 Series into the new article TeraScale (microarchitecture). IMO Radeon HD 4000 Series is still based on TeraScale 1 but without several of the problems it had. A couple of the problems were sorted out in the driver AMD Catalyst but a couple were changes of the microarchitecture. If you look at AMD graphics and search the web a bit, TeraScale is a family of microarchitecture implementing VLIW SIMD pardigms and there were 3 major version of it. I think
 * TeraScale 1 = Radeon HD 2000 Series, definitely Radeon HD 3000 Series and probably also Radeon HD 4000 Series
 * TeraScale 2 = Evergreen in Radeon HD 5000 Series
 * TeraScale 3 = Nothern Island VLIW4 in some of the Radeon HD 6000 Series

Then TeraScale-family was replaced by the microarchitecture named Graphics Core Next. For Nvidia there also are articles: Tesla, Fermi, Kepler and Maxwell. User:ScotXW t@lk 13:16, 6 July 2014 (UTC)

Grammar corrections desperately needed!
I just did a whole lot of grammar cleanup over at the R600 article, and now it looks like the same guy who butchered the English language over there wrote most of this article, too. The frequent references to cards that were released exclusively in China, plus the particular nature of the mistakes (most notably the frequent omissions of "a" and "the"), leads me to believe that the author was Chinese. I'm too tired to deal with this crap. Can someone take care of this, please?

RELEASE DATE
The article mentions R700 is meant to be released for 45nm, in 2009. But right in the begining states that will be out in 2008. Which one is true? Daniel de França (talk) 14:33, 28 January 2008 (UTC)

--may, 2008. The link i provided is to Nordic hardware but its all over the place. Fuds got it, expreviews got it, everyones got it.

hd 4950 article
The article Hd 4850 should probably merged into here. Ant6n (talk) 19:54, 26 June 2008 (UTC)


 * That article now redirects to Radeon R700 -- Imperator3733 (talk) 05:11, 27 June 2008 (UTC)

IT IS RELASED !!!!
Anyone is changing sites ?? this isn't actual state of article.... chipset has been relased (HD RADEON 3870, 3850)... —Preceding unsigned comment added by 83.25.74.8 (talk) 19:32, 6 February 2008 (UTC)

--No, the HD3XX0 series is the R600 family. The R700 chipset is unreleased. —Preceding unsigned comment added by 75.157.29.18 (talk) 07:37, 16 March 2008 (UTC)

regarding the use of ATI alias
Please note that ATI is no longer a company after the acquision by AMD Inc., instead it's now only a brand name instead of an individual entity.

The people who are doing the Radeon line is now belonged to a group in AMD, the AMD Graphics Product Group.

While it is a subsidiary in nature, the use of ATI alias is now only limited to product branding only. For example, the ATI Radeon Graphics Processors, the ATI CrossFire Xpress 3200 chipset for Intel processors, the ATI XGP Technology, the ATI CrossFire X technology and so on. --203.218.208.248 (talk) 16:04, 8 June 2008 (UTC)

Unified Shader - "TeraScale Graphics Engine"
raw shader floating-point performance
 * Based on the R600 architecture, remain the use of 4D+1D clusters
 * 4 SPUs: MADD/ADD/MUL
 * 1 SPU: Transcendental functions
 * Addition of more Stream Processing Units, TMUs and ROPs
 * Enables minimum 1 TeraFLOPS (1 TFLOPS)

Memory, AA/AF enhancements

 * 256-bit memory interface
 * GDDR5 support
 * Anti-aliasing, Anisotrophic Filtering enhancements
 * 40 TMUs, 16 ROPs

CrossFire performance enhancements
bridge for communications among two GPUs
 * Same design as Radeon HD 3870 X2, using PCI Express
 * Addition of CrossFire Sideport, improves CrossFire efficiency

Video and miscellaneous features

 * AVIVO HD
 * UVD2
 * Full MPEG-2, H.264/MPEG-4 AVC, VC-1 decoding
 * Dual video stream support
 * Video upscaling
 * xvYCC color space support
 * 7.1 surround sound output (LPCM, AC3, DTS)
 * Hardware surface tessellation
 * DirectX 10.1
 * Cube Map Array enables global illumination
 * Mandatory 4x AA
 * Double-precision FP
 * 0.5 ULP

Radeon HD 4800
Based on the RV770 GPU. The RV770 GPU is made on 55 nm process from TSMC, carries 956 million transistors in 256 mm^2 die size.

Three variants available, the Radeon HD 4850, the Radeon HD 4870 and the Radeon HD 4870 X2, developed under the R700 codename, with two RV770 GPUs.

Released (for real this time)
Per this article and. I don't have the time to go through it all now but if no one gets info together in a day or two I'll take a crack at it. I am for one quite curious to see the benchmarks on this card since it is only priced at $199 US.-- Oni Ookami Alfador Talk 03:46, 20 June 2008 (UTC)

Yeah, this page needs updating. —Preceding unsigned comment added by 4.246.84.25 (talk) 22:31, 20 June 2008 (UTC)
 * The above information you've mentioned is about the "technical previews" of the Radeon HD 4850 products, and is not related in any way to the official release of such products. The official release date for Radeon HD 4850 product is June 25, 2008. While for the Radeon HD 4870 product, the release date is slated for July 8, 2008, there is no change to the official launch date. Thank you. --218.102.110.135 (talk) 03:21, 21 June 2008 (UTC)
 * The 4850 appears to be for sale(not reserve) at every online electronics retailer that I've checked(Newegg, TigerDirect, ZipZoomfly). I cannot verify though that the 4850 is in any stores yet, as I have not checked, but I would think that if at least TigerDirect is selling them on their website, then they are selling them at their outlet stores. Basterisk (talk) 07:22, 21 June 2008 (UTC)
 * In Hong Kong, they are in stores, even the Radeon HD 4870 products. But does that mean AMD has released them? No, I don't think so. --218.102.110.135 (talk) 14:45, 21 June 2008 (UTC)
 * Regardless of whether the 4850s were officially released or not, this page is still based almost entirely on rumors and tech tabloids, and it should be updated. 67.173.76.220 (talk) 19:20, 21 June 2008 (UTC)

RV770 LE = "HD 4750"
Specs (Updated): 640 SP/32 TMU/12 ROP/256-bit GDDR3/550 MHz Core/993 MHz Memory --203.218.111.161 (talk) 11:47, 5 September 2008 (UTC)

Full Architecture are here (another references )
This is full article about RV770 on AnandTech

The Radeon HD 4850 & 4870: AMD Wins at $199 and $299

Salem F (talk) 16:28, 31 August 2009 (UTC)

New Pictures?
i was just thinking that we could add/improve a picture on this page.Xavier The Second (talk) 16:24, 23 December 2009 (UTC)

External links modified
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 * Added archive https://web.archive.org/web/20090318065915/http://ati.amd.com/products/radeonhd4600/index.html to http://ati.amd.com/products/Radeonhd4600/index.html
 * Added archive https://web.archive.org/web/20081003082415/http://ati.amd.com/products/Radeonhd4300/index.html to http://ati.amd.com/products/Radeonhd4300/index.html
 * Added archive https://web.archive.org/web/20081003075207/http://ati.amd.com/products/Radeonhd4500/index.html to http://ati.amd.com/products/Radeonhd4500/index.html
 * Added archive https://web.archive.org/web/20130716090237/http://developer.amd.com/resources/documentation-articles/developer-guides-manuals/ to http://developer.amd.com/resources/documentation-articles/developer-guides-manuals/
 * Added archive https://web.archive.org/web/20090501003900/http://ati.amd.com/products/hd4000series.html to http://ati.amd.com/products/hd4000series.html
 * Added archive https://web.archive.org/web/20090503152448/http://ati.amd.com/products/hd4000seriesmob.html to http://ati.amd.com/products/hd4000seriesmob.html

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Architecture
As of 4/1/2018 the paragraph "GPU interconnect enhancements" found at the end of the Architecture section has two (2) egregious lapses of editorial competence: "Current generation of dual-GPU design also features an interconnect for inter-GPU communications through the implementation of a CrossFire X SidePort on each GPU, giving extra 5 GB/s full-duplex inter-GPU bandwidth. These two features increase total bandwidth for dual-GPU designs to 21.8 GB/s. At this point, the CrossFire X sideport interconnect has never been enabled in any available drivers." It should go without saying that it is extremely poor practice to assume that the word "current" and the phrase "at this point" MEANS anything to the reader who may be reading this in 2018, 2020, or 2040. It is totally inappropriate and does not belong in an on-line encyclopedia article. If someone wants to check back in the editing history (or happens to know (and have references for) the date at which these two statements were correct, then the paragraph should be edited to indicate that. I am going to remove, unilaterally, the sentence starting with "At this point" and change "Current generation..." to "Subsequent generations..." although this is awkward construction, it doesn't make the gross blunder of assuming that things don't or haven't changed over the last 10+ years (and who knows how far into the future?).174.130.55.77 (talk) 22:42, 1 April 2018 (UTC)

"XFX play hard ATI Radeon HD 4550" listed at Redirects for discussion
A discussion is taking place to address the redirect XFX play hard ATI Radeon HD 4550. The discussion will occur at Redirects for discussion/Log/2020 September 25 until a consensus is reached, and readers of this page are welcome to contribute to the discussion. signed,Rosguill talk 19:29, 25 September 2020 (UTC)