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References are made in future tense to events that have long since passed ... seems this was written four years ago and updated two years ago. GDDR5 is widely used and has been for some time. 142.204.70.21 ( talk) 19:10, 9 October 2012 (UTC)
http://www.vr-zone.com/articles/Qimonda_Delivered_GDDR5_Samples_To_Customers/5379.html
Qimonda AG, a leading supplier of memory products, today announced as first DRAM manufacturer the availability of GDDR5 samples. Qimonda started shipping of the first 512Mb GDDR5 (Graphics Double Data Rate 5) samples to customers.
“We are pleased that we can support the GDDR5 activities of our customers with this first sample shipment, which is a major step to ensure the fast introduction of GDDR5 into the Graphics Market,” said Robert Feurle, Vice President of Business Unit Graphics at Qimonda.
GDDR5 is targeted to become the next predominant graphics DRAM standard and will boost memory bandwidth of graphics applications to a new dimension. The GDDR5 standard is about to get finalized in JEDEC where industry participants jointly defined this leading edge graphics standard over the last years. GDDR5 will be available with data rates up to 20GBytes / s per component, which is more than double the band width of the fastest GDDR3 memories today and comes with a multitude of advanced power saving features. First products with GDDR5 memories are expected for 2008. GDDR5 is targeting a variety of applications, starting with High Performance Desktop Graphic cards followed by Notebook graphics. Later on also the introduction in Game consoles and other graphics intensive applications is planned.
On June 25th, the Radeon HD 4870 was released, which is the first product to incorporate GDDR5. —Preceding unsigned comment added by 24.84.166.215 ( talk) 16:29, 27 June 2008 (UTC)
Added "technical" tag... The first part (main part) of this article is too much technical, and uses terms that don't even have articles about them. I don't think any non-expert (or at least someone very familiar with the subject) would understand it. PluniAlmoni ( talk) 14:09, 28 July 2008 (UTC)
"unlike its predecessors has two parallel DQ links which provide doubled I/O throughput" Uhm, what the hell is a "DQ link" ??? 67.186.140.33 ( talk) 01:14, 29 April 2009 (UTC)
Entry says : "On June 25, 2008, AMD became the first company to ship products using GDDR5 memory with its Radeon HD 4870 video card series, incorporating Qimonda's 512 Mb memory modules at 3.6 Gbit/s bandwidth."
This page http://www.qimonda.com/about/press/releases/05_2008_GDDR5_AMD_e.html says : "...mass production and the volume shipping of GDDR5 512Mbit components with a speed of 4.0Gbps to AMD, a leading global provider of innovative processing solutions in the computing, graphics and consumer electronics markets. " —Preceding unsigned comment added by 75.142.237.78 ( talk) 06:23, 14 February 2009 (UTC)
I've read somewhere that GDDR5 is the counterpart of DDR2, which would mean a GDDR5 would fit on a DDR2 motherboard, is this true? 87.208.140.164 ( talk) 13:36, 11 November 2010 (UTC)
An edit made by 24.114.208.202 added a paragraph about Hyrix Semiconductor's introduction of a 1 GiB chip, but it was written in a very promotional tone. IP address lookup ( link) resolved to "Cyclone Creative", a PR company that seems to specialize in web/social media.
The information helped to flesh out the timeline of chip density débuts, but the press release style of the edit was too blatant.
-- 50.92.219.161 ( talk) 19:07, 2 July 2011 (UTC)
Uhm...here it says "Unlike its predecessor, GDDR4, GDDR5 is based on DDR3 SDRAM", but on the GDDR4 page it says "GDDR4 is based on DDR3 SDRAM technology"?-- Loxus ( talk) 23:43, 14 July 2011 (UTC)
There is a need to include latency considerations like in the wikipedia DDR3 article!
DDR3 timings, this PDF on page 48: http://www.hynix.com/datasheet/pdf/dram/H5TQ1G4(8_6)3AFP(Rev0.1).pdf GDDR5 timings, this PDF on page 133: http://www.hynix.com/datasheet/pdf/graphics/H5GQ1H24AFR(Rev1.0).pdf
GDDR5 timings as provided by Hynix datasheet: CAS = 10.6ns tRCD = 12ns tRP = 12ns tRAS = 28 ns tRC = 40ns
DDR3 timings for Corsair 2133@11-11-11-28, using hynix modules CAS = 10.3ns tRCD = 10.3ns tRP = 10.3ns tRAS = 26.2ns tRC = 36.5ns
http://www.cse.psu.edu/~juz138/files/islped209-zhao.pdf Off-chip GDDR5, 2GB, Bandwidth = 320GB/s Memory Clock = 2.5GHz tRAS = 22ns tCL = 8ns tRP = 8ns tRC = 30ns tRCD = 8ns tRRD = 5ns
Also for this discussion: http://blogs.utexas.edu/jdm4372/2011/03/10/memory-latency-components/ AMd Phenom DDR3@1600
Core + System Request Interface: outbound: ~9 ns Cache Coherence Probes: (~17 ns) — smaller than the memory access path, so probably completely overlapped Memory Access Asynchronous interface crossings: ~21 ns DRAM CAS latency: 11.25 ns Core data forwarding: ~1.5 ns Total non-overlapped: ~43 ns Measured latency: 51.6 ns Unaccounted: ~9 ns = 18 memory controller clock cycles (assuming 2.0 GHz)
There were a great deal of errors presented within this article, more specifically; units and their abbreviations. Firstly, units such as Gibibit and Mebibit do not belong in this article. The article is about memory and so JEDEC memory standards dictate units and their abbreviations. Secondly, although Gibibit and Gigabit can both be abbreviated as "Gbit", I changed all units to "Gb" to avoid confusion between the two. Along with that, I also changed all instances of "Gbit/s" to the more common " Gbps". Thirdly, there is a difference between a byte and a bit. Please refer here for any further information: JEDEC Standard 100B.01. -- Thanks, Jchap1590 ( talk) 13:55, 24 July 2014 (UTC)
I see no reason to keep these templates for this article. The GDDR5 article is no more technical than GDDR4 or any other article on the subject of GDDR memory, for that matter. The advertising issue looks like it was resolved some time ago and all information is up-to-date as far as I am able to determine. If you do not agree with the omission of these templates, state your case here. Jchap1590 ( talk) 20:16, 24 July 2014 (UTC)
I kindly ask that contributors stop changing the units of measure found within the article. If a unit or abbreviation of a unit is used properly and agrees with other units found in the article, there is no reason to edit them. Gbps is Gb/s is Gbit/s. Jchap1590 ( talk) 18:27, 7 April 2015 (UTC)
In the article it is implied that 64 gigabits (8 billion bytes) is equal to 16 times 512 MB = 8192 MB. Can someone explain this bizarre piece of arithmetic? Dondervogel 2 ( talk) 15:26, 12 April 2015 (UTC)
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References are made in future tense to events that have long since passed ... seems this was written four years ago and updated two years ago. GDDR5 is widely used and has been for some time. 142.204.70.21 ( talk) 19:10, 9 October 2012 (UTC)
http://www.vr-zone.com/articles/Qimonda_Delivered_GDDR5_Samples_To_Customers/5379.html
Qimonda AG, a leading supplier of memory products, today announced as first DRAM manufacturer the availability of GDDR5 samples. Qimonda started shipping of the first 512Mb GDDR5 (Graphics Double Data Rate 5) samples to customers.
“We are pleased that we can support the GDDR5 activities of our customers with this first sample shipment, which is a major step to ensure the fast introduction of GDDR5 into the Graphics Market,” said Robert Feurle, Vice President of Business Unit Graphics at Qimonda.
GDDR5 is targeted to become the next predominant graphics DRAM standard and will boost memory bandwidth of graphics applications to a new dimension. The GDDR5 standard is about to get finalized in JEDEC where industry participants jointly defined this leading edge graphics standard over the last years. GDDR5 will be available with data rates up to 20GBytes / s per component, which is more than double the band width of the fastest GDDR3 memories today and comes with a multitude of advanced power saving features. First products with GDDR5 memories are expected for 2008. GDDR5 is targeting a variety of applications, starting with High Performance Desktop Graphic cards followed by Notebook graphics. Later on also the introduction in Game consoles and other graphics intensive applications is planned.
On June 25th, the Radeon HD 4870 was released, which is the first product to incorporate GDDR5. —Preceding unsigned comment added by 24.84.166.215 ( talk) 16:29, 27 June 2008 (UTC)
Added "technical" tag... The first part (main part) of this article is too much technical, and uses terms that don't even have articles about them. I don't think any non-expert (or at least someone very familiar with the subject) would understand it. PluniAlmoni ( talk) 14:09, 28 July 2008 (UTC)
"unlike its predecessors has two parallel DQ links which provide doubled I/O throughput" Uhm, what the hell is a "DQ link" ??? 67.186.140.33 ( talk) 01:14, 29 April 2009 (UTC)
Entry says : "On June 25, 2008, AMD became the first company to ship products using GDDR5 memory with its Radeon HD 4870 video card series, incorporating Qimonda's 512 Mb memory modules at 3.6 Gbit/s bandwidth."
This page http://www.qimonda.com/about/press/releases/05_2008_GDDR5_AMD_e.html says : "...mass production and the volume shipping of GDDR5 512Mbit components with a speed of 4.0Gbps to AMD, a leading global provider of innovative processing solutions in the computing, graphics and consumer electronics markets. " —Preceding unsigned comment added by 75.142.237.78 ( talk) 06:23, 14 February 2009 (UTC)
I've read somewhere that GDDR5 is the counterpart of DDR2, which would mean a GDDR5 would fit on a DDR2 motherboard, is this true? 87.208.140.164 ( talk) 13:36, 11 November 2010 (UTC)
An edit made by 24.114.208.202 added a paragraph about Hyrix Semiconductor's introduction of a 1 GiB chip, but it was written in a very promotional tone. IP address lookup ( link) resolved to "Cyclone Creative", a PR company that seems to specialize in web/social media.
The information helped to flesh out the timeline of chip density débuts, but the press release style of the edit was too blatant.
-- 50.92.219.161 ( talk) 19:07, 2 July 2011 (UTC)
Uhm...here it says "Unlike its predecessor, GDDR4, GDDR5 is based on DDR3 SDRAM", but on the GDDR4 page it says "GDDR4 is based on DDR3 SDRAM technology"?-- Loxus ( talk) 23:43, 14 July 2011 (UTC)
There is a need to include latency considerations like in the wikipedia DDR3 article!
DDR3 timings, this PDF on page 48: http://www.hynix.com/datasheet/pdf/dram/H5TQ1G4(8_6)3AFP(Rev0.1).pdf GDDR5 timings, this PDF on page 133: http://www.hynix.com/datasheet/pdf/graphics/H5GQ1H24AFR(Rev1.0).pdf
GDDR5 timings as provided by Hynix datasheet: CAS = 10.6ns tRCD = 12ns tRP = 12ns tRAS = 28 ns tRC = 40ns
DDR3 timings for Corsair 2133@11-11-11-28, using hynix modules CAS = 10.3ns tRCD = 10.3ns tRP = 10.3ns tRAS = 26.2ns tRC = 36.5ns
http://www.cse.psu.edu/~juz138/files/islped209-zhao.pdf Off-chip GDDR5, 2GB, Bandwidth = 320GB/s Memory Clock = 2.5GHz tRAS = 22ns tCL = 8ns tRP = 8ns tRC = 30ns tRCD = 8ns tRRD = 5ns
Also for this discussion: http://blogs.utexas.edu/jdm4372/2011/03/10/memory-latency-components/ AMd Phenom DDR3@1600
Core + System Request Interface: outbound: ~9 ns Cache Coherence Probes: (~17 ns) — smaller than the memory access path, so probably completely overlapped Memory Access Asynchronous interface crossings: ~21 ns DRAM CAS latency: 11.25 ns Core data forwarding: ~1.5 ns Total non-overlapped: ~43 ns Measured latency: 51.6 ns Unaccounted: ~9 ns = 18 memory controller clock cycles (assuming 2.0 GHz)
There were a great deal of errors presented within this article, more specifically; units and their abbreviations. Firstly, units such as Gibibit and Mebibit do not belong in this article. The article is about memory and so JEDEC memory standards dictate units and their abbreviations. Secondly, although Gibibit and Gigabit can both be abbreviated as "Gbit", I changed all units to "Gb" to avoid confusion between the two. Along with that, I also changed all instances of "Gbit/s" to the more common " Gbps". Thirdly, there is a difference between a byte and a bit. Please refer here for any further information: JEDEC Standard 100B.01. -- Thanks, Jchap1590 ( talk) 13:55, 24 July 2014 (UTC)
I see no reason to keep these templates for this article. The GDDR5 article is no more technical than GDDR4 or any other article on the subject of GDDR memory, for that matter. The advertising issue looks like it was resolved some time ago and all information is up-to-date as far as I am able to determine. If you do not agree with the omission of these templates, state your case here. Jchap1590 ( talk) 20:16, 24 July 2014 (UTC)
I kindly ask that contributors stop changing the units of measure found within the article. If a unit or abbreviation of a unit is used properly and agrees with other units found in the article, there is no reason to edit them. Gbps is Gb/s is Gbit/s. Jchap1590 ( talk) 18:27, 7 April 2015 (UTC)
In the article it is implied that 64 gigabits (8 billion bytes) is equal to 16 times 512 MB = 8192 MB. Can someone explain this bizarre piece of arithmetic? Dondervogel 2 ( talk) 15:26, 12 April 2015 (UTC)
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There is a move discussion in progress on Talk:Synchronous dynamic random-access memory which affects this page. Please participate on that page and not in this talk page section. Thank you. — RMCD bot 19:15, 14 February 2019 (UTC)