By: Antti-Ville Tuunainen (avtuunainen.delete@this.gmail.com), April 15, 2011 12:38 am
Room: Moderated Discussions
Moritz (better@not.tell) on 4/14/11 wrote:
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>So Barts is just a shrink?
No. It's made on 40nm, like cypress.
>If it is architecturally the same as the HD5xxx, then why do you expect a higher than 15% error?
Barts is a rebalancing of design -- It has the ROPs of Cypress, the memory controller of redwood (x2) and 14 shader units. The point is that Cypress had too many shaders and too much memory bandwidth compared to it's rops, so they could cut 30% of the shaders without cutting 30% of the performance.
---------------------------
>So Barts is just a shrink?
No. It's made on 40nm, like cypress.
>If it is architecturally the same as the HD5xxx, then why do you expect a higher than 15% error?
Barts is a rebalancing of design -- It has the ROPs of Cypress, the memory controller of redwood (x2) and 14 shader units. The point is that Cypress had too many shaders and too much memory bandwidth compared to it's rops, so they could cut 30% of the shaders without cutting 30% of the performance.
| Topic | Posted By | Date |
|---|---|---|
| New Article: Predicting GPU Performance for AMD and Nvidia | David Kanter | 2011/04/11 11:55 PM |
| Graph is not red-green colorblind friendly (NT) | RatherNotSay | 2011/04/12 03:51 AM |
| Fixed | David Kanter | 2011/04/12 08:46 AM |
| New Article: Predicting GPU Performance for AMD and Nvidia | James | 2011/04/12 12:30 PM |
| New Article: Predicting GPU Performance for AMD and Nvidia | David Kanter | 2011/04/12 02:51 PM |
| Try HD6450 or HD6850 | EduardoS | 2011/04/12 03:31 PM |
| Try HD6450 or HD6850 | David Kanter | 2011/04/13 10:25 AM |
| Try HD6450 or HD6850 | EduardoS | 2011/04/13 03:20 PM |
| of cause | Moritz | 2011/04/14 08:03 AM |
| of cause | EduardoS | 2011/04/14 01:55 PM |
| Barts = 5D | Moritz | 2011/04/14 09:26 PM |
| Barts = 5D | Antti-Ville Tuunainen | 2011/04/15 12:38 AM |
| Limiting fixed function units | Moritz | 2011/04/15 04:28 AM |
| Limiting fixed function units | Vincent Diepeveen | 2011/04/20 02:38 AM |
| lack of detail | Moritz | 2011/04/20 09:24 AM |
| lack of detail | EduardoS | 2011/04/20 11:45 AM |
| gpgpu | Vincent Diepeveen | 2011/04/16 02:10 AM |
| gpgpu | EduardoS | 2011/04/17 12:31 PM |
| gpgpu | Groo | 2011/04/17 12:58 PM |
| gpgpu | EduardoS | 2011/04/17 01:08 PM |
| gpgpu | Ian Ameline | 2011/04/18 03:55 PM |
| gpgpu | Ping-Che Chen | 2011/04/19 12:59 AM |
| GPU numerical compliance | Sylvain Collange | 2011/04/19 11:38 AM |
| GPU numerical compliance | Vincent Diepeveen | 2011/04/20 02:17 AM |
| gpgpu | Vincent Diepeveen | 2011/04/20 02:02 AM |
| gpgpu and core counts | Heikki Kultala | 2011/04/20 04:41 AM |
| gpgpu and core counts | Vincent Diepeveen | 2011/04/20 05:52 AM |
| gpgpu and core counts | none | 2011/04/20 07:05 AM |
| gpgpu and core counts | EduardoS | 2011/04/20 11:36 AM |
| gpgpu and core counts | Heikki Kultala | 2011/04/20 10:16 AM |
| gpgpu and core counts | EduardoS | 2011/04/20 11:34 AM |
| gpgpu and core counts | Heikki Kultala | 2011/04/20 07:24 PM |
| gpgpu and core counts | EduardoS | 2011/04/20 08:55 PM |
| gpgpu and core counts | Heikki Kultala | 2011/04/21 06:48 AM |
| gpgpu and core counts | EduardoS | 2011/04/22 01:41 PM |
| AMD Compute and Texture Fetch | David Kanter | 2011/04/21 10:42 AM |
| AMD Compute and Texture Fetch | Vincent Diepeveen | 2011/04/22 01:14 AM |
| AMD Compute and Texture Fetch | David Kanter | 2011/04/22 10:53 AM |
| AMD Compute and Texture Fetch | EduardoS | 2011/04/22 01:46 PM |
| AMD Compute and Texture Fetch | David Kanter | 2011/04/22 02:02 PM |
| AMD Compute and Texture Fetch | EduardoS | 2011/04/22 02:18 PM |
| AMD Compute and Texture Fetch | anon | 2011/04/22 03:30 PM |
| AMD Compute and Texture Fetch | David Kanter | 2011/04/22 09:17 PM |
| gpgpu and core counts | Vincent Diepeveen | 2011/04/20 12:12 PM |
| gpgpu and core counts | Heikki Kultala | 2011/04/21 10:23 AM |
| gpgpu and core counts | Vincent Diepeveen | 2011/04/22 02:11 AM |
| Keep the crazy politics out of this | David Kanter | 2011/04/22 08:39 AM |
| Keep the crazy politics out of this | Vincent Diepeveen | 2011/04/22 09:12 AM |
| Keep the crazy politics out of this | David Kanter | 2011/04/22 10:44 AM |
| gpgpu and core counts | Jouni Osmala | 2011/04/22 11:06 AM |
| gpgpu | EduardoS | 2011/04/20 11:59 AM |
| gpgpu | Vincent Diepeveen | 2011/04/20 12:37 PM |
| gpgpu | EduardoS | 2011/04/20 05:27 PM |
| gpgpu | Vincent Diepeveen | 2011/04/21 02:06 AM |
| gpgpu | EduardoS | 2011/04/22 02:00 PM |
| New Article: Predicting GPU Performance for AMD and Nvidia | PiedPiper | 2011/04/12 10:05 PM |
| New Article: Predicting GPU Performance for AMD and Nvidia | David Kanter | 2011/04/12 10:42 PM |
| New Article: Predicting GPU Performance for AMD and Nvidia | MS | 2011/04/15 05:04 AM |
| New Article: Predicting GPU Performance for AMD and Nvidia | Kevin G | 2011/04/16 02:25 AM |
| New Article: Predicting GPU Performance for AMD and Nvidia | David Kanter | 2011/04/16 08:42 AM |
| New Article: Predicting GPU Performance for AMD and Nvidia | Vincent Diepeveen | 2011/04/20 02:20 AM |
| memory | Moritz | 2011/04/14 09:03 PM |
| memory - more | Moritz | 2011/04/15 11:11 PM |
| New Article: Predicting GPU Performance for AMD and Nvidia | Kevin G | 2011/04/14 11:30 AM |