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Larrabee

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#1
Starblaiz

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What more do I need to say? Intel have finally released some information on Larrabee. For those who have been living under the technological rock the past few years, Larrabee aims to bring together your PC's CPU and GPU into a single, programmable chip with absolutely tonnes of cores. If you can imagine AMD's 12-core processor that's due to come out in the not-so-distant future, designed such that any of the cores can be used for either graphics processing OR normal processing, then you pretty much have Intel's Larrabee.

Heres the full article for you all to read: http://www.trustedreviews.com/graphics/rev...Introduction/p1

Personally, I think this is awesome. Finally everything will be in one neat little chip instead of similar chips spread all across your system. Only downside I guess will be a move back to good ol' "shared RAM", so lets hope this time they actually do it right lol! icon_lol.gif

PS: Appologise if this has been posted already. i did a search and returned 0 results so... meh? icon_confused.gif

EDIT: Thought i should clarify before anyone has a fit - I'm talking about the move towards a single chip for both CPU and GPU. The wiki article says it best:

More recent information

A June 2007 PC Watch article suggests that the first Larrabee chips will feature 32 x86 processor cores and come out in 2009, fabricated on a 45 nanometer process. Chips with a few defective cores due to yield issues will be sold as a 24-core version. Later in 2010 Larrabee will be shrunk for a 32 nanometer fabrication process which will enable a 48 core version.[8].

Larrabee will have an extra-wide 512-bit vector processing unit for each core, much wider than SSE (128 bits) and also wider than AVX (256 bits). It is unknown whether Larrabee will use a variant of the AVX instruction set and retain SSE compatibility, or use a new and incompatible set of extended instructions.[9]

Larrabee will probably be available in a server-oriented version which will sit directly in motherboard sockets using Intel's QuickPath interconnect, competitor to AMD's HyperTransport; this may open the possibility of creating a Larrabee-only computer without a companion traditional x86 processor such as the Core 2 Duo.[10]

Fudzilla has posted several short articles about Larrabee, claiming that Larrabee may have a TDP as large as 300W[11], that Larrabee will use a 12-layer PCB and has a cooling system that "is meant to look similar to what you can find on high-end Nvidia cards today,"[12] that Larrabee will use GDDR5 memory, that it is targeted to have 2 teraflops of computing power,[13] and that it doesn't have to use DirectX, but uses a direct mode. [1] Fudzilla also claims a Summer 2009 release date.[14]

In a July 2008 interview, Intel's Pat Gelsinger stated that Larrabee’s x86 cores will be based on Intel’s P54C architecture, which was last seen in the original Pentium chips, such as the Pentium 75, in the early 1990s.[15] Intel later said that Gelsinger had not revealed any details about the number or type of cores in Larrabee. However, other sources have confirmed the news, adding that the P54C has been adapted by the Pentagon for rad-hard applications, and this revised P54C was in turn adapted for Larrabee.[16] Those sources have also claimed a 4 MB coherent L2 cache, and 3-operand instructions capability.

On August 12, 2008, Intel will present a paper describing Larrabee at SIGGRAPH. [17] The paper is said to contain a comparison of performance between Larrabee and Core 2 Duo, which reveals that the single-threaded performance of one of Larrabee's cores is roughly half that of a "Core 2" core, while the overall performance per watt of a Larrabee chip is 20× better than a Core 2 Duo chip.[18]

On August 3, 2008, Intel present more information to analysts and journalists. Some interesting functionality were identified:[19] [20]


#2
DHC

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modularity is key to customization

i see a future in this for laptop integrated video, and perhaps small consumer desktops, but not much more, and certainly not in gaming rigs or workstations

#3
Weiman

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That just depends on how it performs. Larrabee is the way to go for games that support ray-tracing. Which is basically the next step in 3D graphics, and will replace polygons as time goes by.


QUOTE (Weiman @ Apr 5 2009, 01:09 PM) <{POST_SNAPBACK}>
This is exactly what has been going on through the entire thread, and it's not the first time either.
You come to us for advice..you just spell out what you want to get, and then ask us if it is okay, and we have to explain why it isn't. That's the world upside down.. If you would just say 'hey guys, I have an X amount of money, what should I buy?' Then this would be over in 2-3 posts, not 2-3 pages.
QUOTE (Kazzerax @ May 21 2009, 09:01 AM) <{POST_SNAPBACK}>
Every time someone goes against Weiman's sig I feel like they should be bludgeoned for a few minutes in the head to feel the headache I feel when I realize someone really IS that dense.

#4
TheCh*ckenFace

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Fairly mixed feelings, but looks quite nice: upgrading could be worse and the principle sounds fine!
Its clear now why Intel have been so cagey.

...the forums have gone down hill since those days :(




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#5
DHC

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QUOTE (Weiman @ Aug 4 2008, 01:00 PM) <{POST_SNAPBACK}>
That just depends on how it performs. Larrabee is the way to go for games that support ray-tracing. Which is basically the next step in 3D graphics, and will replace polygons as time goes by.


ray tracing will replace raster graphics for light mapping - you still need polygons to have any kind of shapes icon_wink.gif

but is it true that Larrabee will be a good RPU? if so, im VERY excited! i mean, it already has to be a good floating point processor to do raster graphics, and it must be an amazing arithmetic processor to do normal central processing. if it can do all 3, I will cream my pants in delight

still though, I dont like the "all-in-one" idea - it kills customization icon_sad.gif but if i can choose separates, and all the modular parts are based on one very successful and variable processor, then all the better icon_smile.gif think of how awesome this will be for streamlining programing for these chips!

#6
Weiman

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http://techreport.com/discussions.x/14946

That's 16 cores running ET:Quake wars at 720p at 14-30 fps. If larrabee goes to 32 cores, with improved latencies because of Quickpath and DDR3, I'd say it's going to go very fast. Of course you never want to be an early adopter, those always get f'ed the most.


QUOTE (Weiman @ Apr 5 2009, 01:09 PM) <{POST_SNAPBACK}>
This is exactly what has been going on through the entire thread, and it's not the first time either.
You come to us for advice..you just spell out what you want to get, and then ask us if it is okay, and we have to explain why it isn't. That's the world upside down.. If you would just say 'hey guys, I have an X amount of money, what should I buy?' Then this would be over in 2-3 posts, not 2-3 pages.
QUOTE (Kazzerax @ May 21 2009, 09:01 AM) <{POST_SNAPBACK}>
Every time someone goes against Weiman's sig I feel like they should be bludgeoned for a few minutes in the head to feel the headache I feel when I realize someone really IS that dense.

#7
DHC

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ah - so its not a particularly well designed RPU, it just makes do with pressing standard CPU's to the max

WOW. if they can do that with CPU's, i cannot WAIT for a commercial RPU to be released. many firms are already creating some crude ones that have amazing abilities - its only a matter of time icon_biggrin.gif



back to Larrabee - if this can be made cheap enough, i am STOKED for it's role in the media center world. being able to redirect so much computing power, so efficiently, to so many varied operations - 1080p decoding of h.264 and multi-channel DVR recording and simultaneous playback are going to be so seamless!




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