Message boards :
Number crunching :
What is WDDM 1.3 in Win 8.1 Preview and why should I care?
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TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
I was looking around, trying to decide what would be best for this new AMD card that doesn't work in XP, and I ran across this, Feature Highlights of the AMD Catalyst™ Windows® 8.1 Preview Driver: WDDM 1.3 driver model support for the following products... There aren't many cards supported, so, you would think there was something special about it. Or maybe, it's just a lousy Preview driver... I do have 'the card' in Windows '8.0' at present. I'm just wondering if I should try out the 8.1 Preview with the 'limited' driver support. Decisions, decisions... |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
These are the features in the new WDDM 1.3 standard: http://msdn.microsoft.com/en-us/library/windows/hardware/dn265512(v=vs.85).aspx
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TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
So, will this supercharge SETI, or kill it stone cold dead? If you install a 7750 in XP with an older OpenCL supported card, reinstall OpenCL for the older card, every time an App queries OpenCL support, XP instantly reboots. Not even enough time for a BSOD...reboot. I'm just wondering what would happen with this driver and BOINC... |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
WDDM specifies features a driver should support. This should be completely separate from OpenCL which is a different standard. [Edited to add] If you want to make sure you still have OpenCL functionality, you may want to see if AMD has released a fully WDDM 1.3 / OpenCL complaint preview driver for Windows 8.1. |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
It says it supports OpenCL; Support for AMD Features, including: Maybe I'll give it a try in a few days once I recover from my bouts with the 7750 in Linux and OSX on a Mac. Hopefully, someone else would have tried the 8.1 driver by then :-) |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
The biggest remaining issue with ATi OpenCL drivers - CPU availability required. Even with quite low CPU usage CPU core should be freed to load GPU fully. Cause we see such behavior not under all drivers (for same app) this could change in future driver revisions. So, worth to try and see how app behaves under new driver and fully loaded CPU. SETI apps news We're not gonna fight them. We're gonna transcend them. |
Mike Send message Joined: 17 Feb 01 Posts: 34258 Credit: 79,922,639 RAC: 80 |
I just ran a bench on win 8.1 preview using 13.4 drivers. Works fine w/o problems. With each crime and every kindness we birth our future. |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
I just ran a bench on win 8.1 preview using 13.4 drivers. and CPU usage? SETI apps news We're not gonna fight them. We're gonna transcend them. |
Mike Send message Joined: 17 Feb 01 Posts: 34258 Credit: 79,922,639 RAC: 80 |
I just ran a bench on win 8.1 preview using 13.4 drivers. I posted the complete bench at Lunatics. With each crime and every kindness we birth our future. |
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