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Qimonda ships the first samples of GDDR5 SGRAM memory

Global memory supplier Qimonda today announced that it is has shipped the industry’s first 512MB Graphics Double Data Rate (GDDR5) samples to partners and customers. GDDR5 SGRAM is the successor to GDDR4 SDRAM, which has yet to completely overtake GDDR3 SDRAM.  

The Joint Electron Device Engineering Council (JEDEC) has not solidified the standards for GDDR5. However, JEDEC's GDDR5 special interest group is in its second year of operation, and finalized specifications may come sooner than later.

GDDR5 features data rates at 20GByte/s per component. This is double the bandwidth of the fastest GDDR3 memory.

GDDR5 operates using two different clock types. One clock type that GDDR5 comes with is a differential clock (CK), where address and command inputs are referenced. The other clock type that GDDR5 uses is the forwarded differential write clock (WCK), which operates at twice the frequency of the CK. Read and write data are referenced to the WCK.

Each write clock of GDDR5 SGRAM is assigned to two bytes.

The CK and WCK signals are aligned during the initialization and training sequence. The use of two separate clocks allows for minimal noise and jitter at high data rates

In addition to larger bandwidth and faster speeds, GDDR5 also comes with new power saving features that previous GDDR memory versions don't have. GDDR5 SGRAM has been designed in a way to consume power only when it is really needed.
The DRAM core of GDDR5 features various integrated low power modes. In addition, GDDR5 also allows the system to dynamically scale its I/O data rate depending on the workload at hand. I/O data rate can be changed from 5 Gbps all the way down to 200 Mbps,

JEDEC analysts estimate initial GDDR5-equipped products will appear in late 2008 on very select applications.  High end graphics cores in development today, NVIDIA's next-generation architecture and AMD's R700, would be the first graphics cores capable of utilizing the new signalling required for GDDR5. 

However, the dynamic power management and frequency scaling make GDDR5 most useful for mobile applications. Given the slower release schedules of mobile hardware, GDDR5 will not make a splash into the notebook market until 2009.

In addition to desktop and notebook graphics, GDDR5 is also expected to be used in game consoles and other graphics intensive applications.

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A simple question
By AlphaVirus on 11/2/07, Rating: 0
RE: A simple question
By rtrski on 11/2/2007 12:48:07 PM , Rating: 2
I think you're mistaking the main memory (DDR2 widespread, DDR3 the new offering still at a premium) with the graphics memory ( G DDR-3 and -4 both pretty widespread, depending on graphics chipset, now G DDR5 introduced).

RE: A simple question
By zombiexl on 11/2/2007 12:52:56 PM , Rating: 2
How long has GDDR4 really been widely used in video cards?

RE: A simple question
By IcY18 on 11/2/2007 12:59:03 PM , Rating: 3
It was used on the ATi X1950XTX and is now used on the 2900XT. nVidia has not yet released a product with GDDR4 because of the higher cost and (in there eyes)low benefit, but the rumor is,for enthusiast cards, skip GDDR4 and go straight to GDDR5.

RE: A simple question
By Cerberus29 on 11/2/2007 1:13:53 PM , Rating: 1
Actually only a few 2900s use GDDR4. If you take a look on scan only 2 use GDDR4.

Its not really being introduced too soon, I mean we won't see it being used till 2009/2010 I think, despite what they say.

I mean DDR2 RAM has only really just taken off, well with the release of Core2, before that DDR was faster as Athlon64s were the processor of choice.

RE: A simple question
By sj420 on 11/3/2007 9:28:47 PM , Rating: 1
Hell why stick towaiting for 2x3 (GDDR5) why not wait till 3x3 (GDDR6)? Really, there isn't a benefit past 4 until 6, then 8. I don't understand why they didn't aim for 6 anyway. Numbers that can split evenly are good numbers. 4, 6, 8, etc. They really should see somethings as a "level" like in an RPG. Aim for a certain level to get a certain skill/attack/etc. They just release whatever they got at every "level" it seems. Hah.

I always say, when you think you are done there is always a mistake and there is always a way to refine the whole thing!

RE: A simple question
By formulav8 on 11/2/2007 12:59:57 PM , Rating: 2
Since the Radeon x1950XT if I remember correctly.

RE: A simple question
By Black69ta on 11/2/07, Rating: 0
RE: A simple question
By therealnickdanger on 11/2/2007 2:10:05 PM , Rating: 4
Sure, check this out:

I count 10 cards, ranging from a $130 X2600XT all the way up to the X2900XT

RE: A simple question
By FITCamaro on 11/2/2007 3:36:20 PM , Rating: 2
The X1950XTX 512MB has GDDR4. I have one.

RE: A simple question
By MrFluffo on 11/2/2007 12:49:20 PM , Rating: 2
This is G DDR5. GDDR is the type of memory used in graphics cards. Its not related to normal DDR RAM for systems.

RE: A simple question
By Jedi2155 on 11/2/2007 7:13:28 PM , Rating: 2
GDDR5 would probably relate to DDR4, while GDDR4 is more like DDR3, and GDDR3 is like DDR2 etc.

RE: A simple question
By Warren21 on 11/3/2007 11:19:38 PM , Rating: 2
Not at all, but let me try and rephrase what you meant. GDDR5 and DDR4 will be in use/be introduced around the same time. Same goes for cards that have GDDR4 and systems that use DDR3 (as we are seeing now); GDDR3 and DDR2.

RE: A simple question
By Oobu on 11/6/2007 4:22:14 AM , Rating: 2
Nice clarification.

What is SGRAM?
By Cobra Commander on 11/2/2007 1:05:14 PM , Rating: 3
I thought it was S D RAM (as pictured on the chip itself)?

RE: What is SGRAM?
By gtrinku on 11/2/2007 3:01:48 PM , Rating: 3
No, it's actually Synchronous Graphics RAM, hence SGRAM. From wikipedia:
TextSGRAM is a specialized form of SDRAM for graphics adaptors. It adds functions such as bit masking (writing to a specified bit plane without affecting the others) and block write (filling a block of memory with a single colour). Unlike VRAM and WRAM, SGRAM is single-ported. However, it can open two memory pages at once, which simulates the dual-port nature of other video RAM technologies.

RE: What is SGRAM?
By gtrinku on 11/2/2007 3:03:55 PM , Rating: 2
"TextSGRAM" should read just "SGRAM".

By MPE on 11/2/2007 1:31:09 PM , Rating: 2
Qomonda ships the first samples of GDDR5 SGRAM memory

RE: Correction
By KristopherKubicki on 11/3/2007 10:51:41 AM , Rating: 2

By Bioniccrackmonk on 11/2/2007 1:48:07 PM , Rating: 2
GDDR5 also comes with new power saving features that previous GDDR memory versions don't have. GDDR5 SGRAM has been designed in a way to consume power only when it is really needed.

So what impact, if any, will this have on overclocking?

If I push it to the extreme, will it finally come with a big red "F U do it anyway" button?

I can only hope so.

Mb, not MB
By CryptoQuick on 11/3/2007 1:59:50 PM , Rating: 2
the industry’s first 512MB Graphics Double Data Rate (GDDR5) samples

Although your URL to the original article is broken, I was clever enough to figure out you meant Mb, which is the unit in which the actual memory chip components are commonly sold as.

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