NVIDIA's Fermi: Architected for Tesla, 3 Billion Transistors in 2010
by Anand Lal Shimpi on September 30, 2009 12:00 AM EST- Posted in
- GPUs
ECC Support
AMD's Radeon HD 5870 can detect errors on the memory bus, but it can't correct them. The register file, L1 cache, L2 cache and DRAM all have full ECC support in Fermi. This is one of those Tesla-specific features.
Many Tesla customers won't even talk to NVIDIA about moving their algorithms to GPUs unless NVIDIA can deliver ECC support. The scale of their installations is so large that ECC is absolutely necessary (or at least perceived to be).
Unified 64-bit Memory Addressing
In previous architectures there was a different load instruction depending on the type of memory: local (per thread), shared (per group of threads) or global (per kernel). This created issues with pointers and generally made a mess that programmers had to clean up.
Fermi unifies the address space so that there's only one instruction and the address of the memory is what determines where it's stored. The lowest bits are for local memory, the next set is for shared and then the remainder of the address space is global.
The unified address space is apparently necessary to enable C++ support for NVIDIA GPUs, which Fermi is designed to do.
The other big change to memory addressability is in the size of the address space. G80 and GT200 had a 32-bit address space, but next year NVIDIA expects to see Tesla boards with over 4GB of GDDR5 on board. Fermi now supports 64-bit addresses but the chip can physically address 40-bits of memory, or 1TB. That should be enough for now.
Both the unified address space and 64-bit addressing are almost exclusively for the compute space at this point. Consumer graphics cards won't need more than 4GB of memory for at least another couple of years. These changes were painful for NVIDIA to implement, and ultimately contributed to Fermi's delay, but necessary in NVIDIA's eyes.
New ISA Changes Enable DX11, OpenCL and C++, Visual Studio Support
Now this is cool. NVIDIA is announcing Nexus (no, not the thing from Star Trek Generations) a visual studio plugin that enables hardware debugging for CUDA code in visual studio. You can treat the GPU like a CPU, step into functions, look at the state of the GPU all in visual studio with Nexus. This is a huge step forward for CUDA developers.
Nexus running in Visual Studio on a CUDA GPU
Simply enabling DX11 support is a big enough change for a GPU - AMD had to go through that with RV870. Fermi implements a wide set of changes to its ISA, primarily designed at enabling C++ support. Virtual functions, new/delete, try/catch are all parts of C++ and enabled on Fermi.
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SiliconDoc - Thursday, October 1, 2009 - link
Sweet ! Nice pick, looks like carbon fiber at the bracket end.Wowzie, a real honker based on THOUSANDS OF DOLLARS of tech and core per part.
I feel SO PRIVLEDGED to have a chance at the gaming segment version, all that massive power jammed into a gaming card !
Whoo! U P S C A L E !
justaviking - Thursday, October 1, 2009 - link
Look at every bright area of high contrast. All the spotlight reflections have a red ring around them. So the thumb, in front of the highly reflective gold connectors, also has the same halo effect. I think that it's as much evidence of a digital camera as it is Photoshop manipulation.With that said, it could also be a non-functional mock-up. Holding a mock-up or prototype in your hand is not the same as benchmarking a production (ready for consumer release) product.
papapapapapapapababy - Thursday, October 1, 2009 - link
look at that irregular borders closely. ( above the watch) also, the shadows (finger) are off. thats a (terrible) shop.v1001 - Thursday, October 1, 2009 - link
All they did was blacken out the background more. Probably was more noise and distraction going on that they didn't want in there.justaviking - Thursday, October 1, 2009 - link
OK, so assuming it's a fake (and I'm not saying it isn't), I have three questions:1) Where did you get the photo?
2) Why do it? (And "Who did it?", but that's closely related to Q1.
3) Where did they get the photo of the hardware, which they then put into the person's hand?
Combining #2 and #3) If the card is from a real photo of real hardware, then what was the value of photoshopping it into someone's hand?
I'm not trying to argue, just trying to understand.
papapapapapapapababy - Thursday, October 1, 2009 - link
more fakes! source: bit-tech ( this one is even "better")http://i34.tinypic.com/34inz9j.jpg">http://i34.tinypic.com/34inz9j.jpg
also, not mine ( from xnews)
http://img28.imageshack.us/img28/2883/tesafilm.png">http://img28.imageshack.us/img28/2883/tesafilm.png
papapapapapapapababy - Thursday, October 1, 2009 - link
also below the card... whats that sloppy withe trim in the middle of a shadow? JAaAAAUNCjigga - Thursday, October 1, 2009 - link
Seriously? I have a 1080p monitor and Radeon 4670 with UVD2, but my PS3 with 1080p output to the same monitor looks MUCH better at upscaling DVDs (night and day difference.) PowerDVD does have a better upscaling tech, but that's using software decoding. Can somebody port ffdshow/libmpeg2 for CUDA and ATI Stream (or DirectCompute?) kthxbyePastuch - Thursday, October 1, 2009 - link
I buy two videocards per year on average. I've owned an almost equal number of ATI/Nvidia cards. I loved my geforce 8800 GTX despite it costing a fortune but since then it's been ALL down hill. I've had driver issues with home theater PCs and Nvidia drivers. I've been totally disappointed with Nvidias performance with high def audio formats. The fact that the entire ATI 48xx line can do 7.1 audio pass-through while only a handful of Nvidia videocards can even do 5.1 audio passthrough is just sad. The world is moving to hometheater gaming PCs and Nvidia is dragging arse.The fact that 5850 can do bitstreaming audio for $250 RIGHT NOW and is the second fastest 1 GPU solution for gaming makes it one hell of a product in my eyes. You no longer nead an Asus Xonar or Auzentech soundcard saving me $200. Hell with the money I saved I could almost buy a SECOND 5850! Lets see if the new Nvidia cards can do bitstreaming... if they can't then Nvidia won't be getting any more of my money.
P.S. Thanks Anand for inspiring me to build the hometheater of my dreams. Gaming on a 110 Inch screen is the future!
SiliconDoc - Thursday, October 1, 2009 - link
Well that's very nice, and since this has been declared the home of "only game fps and bang for that buck" matters, and therefore PhysX, ambient occlusion, CUDA, and other nvidia advantages, and your "outlier" htpc desires are WORTHLESS according to the home crowd, I guess they can't respond without contradiciting themselves, so I will considering I have always supported added value, and have been attacked for it.--
Yes, throw out your $200 sound cards, or sell them, and plop that heat monster into the tiny unit, good luck. Better spend some on after market cooling, or the raging videocard fan sound will probably drive you crazy. So another $100 there.
Now the $100 you got for the used soundcard is gone.
I also wonder what sound chip you're going to use then when you aren't playing a movie or whatever, I suppose you'll use your motherboard sound chip, which might be a lousy one, and definitely is lousier than the Auzentech you just sold or tossed.
So how exactly does "passthrough" save you a dime ?
If you're going to try to copy Anand's basement theatre projection, I have to wonder why you wouldn't use the digital or optical output of the high end soundcard... or your motherboards, if indeed it has a decent soundchip on it, which isn't exactly likely.
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Maybe we'll all get luckier,and with TESLA like massive computing power, we'll get an NVIDIA blueray dvd movie player converter that runs on the holy grail of the PhysX haters, openCL and or direct compute, and you'll have to do with the better sound of your add on sound cards, anyway, instead of using a videocard as a transit device.
I can't imagine "cable mamnagement" as an excuse either, with a 110" curved screen home built threate room...
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Feel free to educate me.