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  1. L

    If Fury is overpriced, why is a $1000 Titan-X acceptable?

    There is a reasonably sized market for GPUs with fast single precision and high capacity (e.g. 12GB) memory outside of gaming. Google, Baidu, Facebook, Yandex, Amazon, and others buy them for CUDA and machine learning. At GTC, the NVIDIA CEO said that Titan was targeted at this market...
  2. L

    How does a person get an in depth understanding of computers etc??

    I mixed self study with formal education. For self study I read as much as possible, of the most detailed material possible. I used the information that I learned to build increasingly complex projects. These in turn exposed me to new problems that required more research to discover...
  3. L

    Nvidia Denver... finally here... and it looks good

    There was a big difference between Transmeta and Itanium. The Transmeta approach recompiles and reoptimizes the program while it is being executed. The Itanium approach requires the program to be compiled statically. This isn't the same approach at all.
  4. L

    NVIDIA preparing four Maxwell GM204 SKUs (VideocardZ via S/A)

    I disagree. There is actually a lot of potential for big performance improvements just through better architecture, better circuits, and better software. Think of it this way. Much of architecture, circuits, compiler, and system software research for the past 20-30 years has concentrated...
  5. L

    What Is The Minimum Amount of Memory a GPU Should Have?

    "640 kB ought to be enough for anyone" comes to mind here... Quite seriously though, it is always possible for someone to write an application/game that does something useful with more memory. So as long as technology scaling continues, there will never be an amount that is high enough for...
  6. L

    Single Precision Floating Point in GPUs?

    As mentioned above, a single precision floating point value is defined by the IEEE 754 as a 32-bit value that can be manipulated with a specific set of operations, such as multiplication, addition, etc. In GPU specifications, single precision floating point operations per second is commonly...
  7. L

    Looking for a special CPU benchmark

    Why not just use a game that you think has this behaviour? It is often very difficult to find a benchmark that exactly matches the characteristics of a specific application because there are many factors at play, and the specific factor that limits the performance of your application is not...
  8. L

    Linus Torvalds: "Geekbench is SH*T"

    I'm constantly surprised by how much we are still learning about a field that has so much history. The application of perfect elimination orders to graph coloring was discovered as a theoretical result in 2003 (http://www.cis.uoguelph.ca/~sawada/papers/chordal.pdf), and the implications of this...
  9. L

    Intel TSX Presentation at SuperComputing 2013

    Here's a link to the paper: http://pcl.intel-research.net/publications/SC13-TSX.pdf
  10. L

    When will we see a completely new Intel uarch (similar to Netburst->Core jump)?

    I don't want to derail the thread to go into too much detail on caches However, adding additional levels still adds miss latency since you have to go through another state machine and buffers before hitting the memory controller. Adding an additional layer probably (depending on layout) also...
  11. L

    When will we see a completely new Intel uarch (similar to Netburst->Core jump)?

    Yeah, I more or less agree that it is possible to increase perf if you are willing to arbitrarily increase cost. We probably will see small 3-5% improvements over time. There may even be a few ideas that can deliver more than this. This is what I meant when I said that there isn't a lot of...
  12. L

    When will we see a completely new Intel uarch (similar to Netburst->Core jump)?

    I meant within the design constraints of a desktop CPU that can be sold at a profit. If you throw cost out the window you could probably do somewhat better, although this isn't always true since bigger structures often have higher latency. You can never throw out power as a constraint in a CPU...
  13. L

    When will we see a completely new Intel uarch (similar to Netburst->Core jump)?

    JimmyG is exactly right. There is not a lot of headroom left to increase single threaded CPU performance beyond Haswell barring a major breakthrough (and btw, most architecture research labs have already decided that this problem isn't solvable and have moved onto other problems like power...
  14. L

    Microwave Circuit Design vs. Traditional Analog

    No, frequency used in the context of microwave means the frequency of the electromagnetic waves. Recall that for EM waves, frequency directly corresponds to wavelength because of the fixed speed of light, so the name refers to the wavelength -- seemingly micro as in micrometer wavelength(10^-6...
  15. L

    Power PC

    Glad to help if I can. Just try to keep in mind when you are reading posts like this that everyone who participates in these debates (me included) has some agenda that they are trying to push to other people. Even with an in-depth understanding and complete performance characterization of...
  16. L

    How to best build RAID for scientific computing

    What exactly is your problem that requires 1GB/s of bandwidth? Even if you could get anywhere near that from a disk array over SATA (you can't because of OS, error checking, communication overheads) you won't be able to process it fast enough to do anything with it other than move it around...
  17. L

    Power PC

    The example above reinforces the point that I made in my previous post: if you just throw a program together that was designed and optimized for a different architecture, there is no support built into cell to reorganize your code to make it run efficiently. Specifically, the above example runs...
  18. L

    Power PC

    Cell is interesting not because it will be extremely useful or easily integrated into in modern desktop or embedded platforms, but because it is designed around a programming model that is revolutionary from the perspective of commodity microprocessors (Intel, AMD, SUN, IBM etc). Specifically...
  19. L

    Sound analysis

    If the noise you are dealing with is truly random, then you are screwed. Once it is mixed with your signal, there is NO way to remove it without having some knowledge of the characteristics of the noise or your signal. For example, if you know that there is a fan oscillating at 50 hz, you can...
  20. L

    Moola - Theory and practice?

    JoshGuru7 nailed it, the expected value is the same for each level. An interesting note is that the expected payout of playing goes to infinity as the number of levels goes to infinity. SUM[(.5^k)*(.01*2^(k-1)),k,1,infin] -> infin
  21. L

    What is this electronic schematic symbol?

    Try to find a schematic that gives precise part numbers for the transistors/diodes/etc or at least gives gross device parameters like current gain for transistors and junction voltage for diodes so you can find parts with the same characteristics. Barring that, you could just go with what...
  22. L

    will cpu's and gpu's eventually converge?

    keep in mind that fewer than 10 years ago, all graphics processing was done on the CPU. Because CPUs were not optimized to do the needed graphical processing, they split into GPUs. I'm not saying it is impossible, but it is interesting that if CPUs and GPUs do converge into one chip, we will be...
  23. L

    How do you make memory?

    Someone can correct me if I'm wrong but I assume that it is the same basic idea as fabricating anything else on silicon. http://en.wikipedia.org/wiki/Semiconductor_fabrication
  24. L

    if computers were designed from scratch today, how different would they be?

    I've never heard of any advantage that big endian has over little endian or vice versa. Could someone explain this in a little more detail?
  25. L

    Why "60 Terahertz" for conciousness ?

    You can't measure the processing power of the brain in terms of clock cycles because it is an asynchronous entity. There is no distributed clock signal that occurs at regular intervals that governs the transition of states. The clock speed measurement of the brain comes from an era when...
  26. L

    Why Do RAM Amounts Usually Run in Multiples of 2?

    Could you explain that in a little more detail? I was under the impression that a cpu can't see the physical memory addresses. It can only see vitual addresses which are then mapped to physical addresses by a TLB or page table. Since the TLB and page table entries are created dynamically...
  27. L

    A king is crowned? Bush says he does not consider himself bound to tell Congress how the Patriot Act's powers being used

    Dude you just said Bush and good intentions in the same post. I need to sit down. I'm feeling a little dizzy...
  28. L

    Dual Core or Quad Core?!

    Why multicores? Because we can. Chip area increases every new process generaion (like every 2-3 years). This means that you can cram more function into the same chip at the same price. It took thousands of engineers over 5 years to design the pentium 4. Now we have twice the area...
  29. L

    Can some explain the difference between Digtal and Analog Circuits?

    Don't be so quick to write off analog IC engineering as dead. Remember that although it is a lot easier to work with digital systems, those systems have to have some interface with the real world. There has to be some analog device that captures a signal, filters and samples it before it goes...
  30. L

    Can some explain the difference between Digtal and Analog Circuits?

    A digital signal is just an interpretation of an analog signal. Say you have a system of transistors that operates between 0 and 5 volts. Say the switching voltage for your logic gates is 2.5 volts. So anything over 2.5 volts will cause your transistors to switch, and anything under 2.5 will...
  31. L

    Electrical Engineering

    If you guys are interested in digital logic, you should consider learning a Hardware Design Language like VHDL or Verilog. Once you get through the basics of a language, you will be able to make a model of any digital device that you want. Once you have that, you can run a simulation to...
  32. L

    Electrical Engineering

    You need to be familiar with real calculus if you are going to a real university. One of the most important parts of being an EE, or any kind of engineer, is developing models that describe the physical world. Once you have a model, you can make predictions about how something would behave in...
  33. L

    a complete beginner

    I'm my own experience, I've found that it is hard to learn about something if you're goal is to just learn about it. I tried picking up C++ when I was about twelve (eight years ago), but could never really get into it. The problem was that I wanted to learn how to code, but I didn't have...
  34. L

    trillian vs GAIM

    from the gaim faq... Does Gaim support file transfer? AIM and ICQ file transfer is partially implemented. Notably, it will fail when the sender is behind a NAT device, and sometimes when the sender is behind a firewall even if not behind a NAT. Jonathan Clark is working on this as a...
  35. L

    Polymers will replace Silicon; Polican Valley

    I haven't read the article yet, but just off hand it seems that it would be difficult for a polymer to take the place of a semiconductor. I was under the impression that the useful properties of silicon (constant bandgap, reaction to dopants, constant carrier mobility) were brought about by its...
  36. L

    Ancient System. What do I do for this guy?

    Pretty much every agp card I have seen is 8x/4x compatible. My brother was running a 9800pro in a 4x slot for several months with no problems. Just make sure the powersupply can handle it. I've seen old dells with 130/150W supplies.
  37. L

    What do you guys think about this?

    If you don't need any more space right now, I would say just leave it. If you ever need more space in the future (and have a raid5 controller to spare) just remember that you can switch to raid 5 and get potentially faster performance and 2 extra drives.
  38. L

    Precalc Woes...

    13333333333333333336 1---------------5---------------6 1---------------5---------------6 1---------------5---------------6 1---------------5---------------6 1---------------5---------------6 14444444445444444446 1---------------5---------------6 1---------------5---------------6...
  39. L

    Anand's New Website?

    http://www.dailytech.com/
  40. L

    This ONE homework question is frustrating me...

    that's kind of a gay question since drop downs and radio can only have one item selected, but I think they are referring to radio buttons....
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