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| Thread ID: 102249 | 2009-08-13 01:02:00 | Lucid Hydra - Better than SLI or Crossfire? | Agent_24 (57) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 800632 | 2009-08-13 01:02:00 | www.iopanel.net techreport.com Anyone else heard of it? I hope they bring out one for AMD :D |
Agent_24 (57) | ||
| 800633 | 2009-08-13 02:14:00 | www.iopanel.net techreport.com Anyone else heard of it? I hope they bring out one for AMD :D Heard about this about a yr ago....thought it had died! |
SolMiester (139) | ||
| 800634 | 2009-08-13 06:00:00 | The Hydra 100 then appears to the host OS as a PCIe device, with its own driver. It intercepts calls made to the most common graphics APIs—OpenGL, DirectX 9/10/10.1—and reads in all of the calls required to draw an entire frame of imagery. Lucid's driver and the Hydra 100's RISC logic then collaborate on breaking down all of the work required to produce that frame, dividing the work required into tasks, determining where the bottlenecks will likely be for this particular frame, and assigning the tasks to the available rendering resources (two or more GPUs) in real time—for graphics, that's within the span of milliseconds. The GPUs then complete the work assigned to them and return the results to the Hydra 100 via PCI Express. The Hydra streams in the images from the GPUs, combines them as appropriate via its compositing engine, and streams the results back to the GPU connected to the monitor for display. As I understand it, because data is streamed from the GPUs into the compositing engine pixel by pixel, and because the compositing engine immediately begins streaming back out the combined result, the effective latency for the compositing step is very low. Once a frame has been completed, Lucid analyzes the relative performance of its client GPUs for that frame and dynamically adjusts its expectations for the next one. Just sounds like extra lag to me. I went right off SLI/Crossfire. Tried it and performance is fairly sad for the cost of having more than one card. Better to buy the best performing card out and stick with one. |
pctek (84) | ||
| 800635 | 2009-08-14 06:39:00 | I expect they warm the room nicely though. | R2x1 (4628) | ||
| 800636 | 2009-08-14 10:13:00 | Not really, it only uses 5 watts and doesn't require a heatsink | Agent_24 (57) | ||
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