Hi Leon I just went through the same thing with a HP Pavilion Elite m9450f running Win7 (Asus IPIBL-LB motherboard aka HP Benicia-GL8E). In my case, the solution was to completely remove Norton Internet Security 2010 (NIS). This dropped the DPC latency from 8000usec max to 500usec when using IE/Chrome. Disabling virus scanning was not enough - I had to completely remove the NIS software.
Special thanks to Neal Campbell (K3NC) for his advice and patience!! Good luck, Sheldon -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Leon Sent: Monday, November 23, 2009 4:17 PM To: flexradio@flex-radio.biz Subject: [Flexradio] Power SDR Freezes continued Here's the latest update on my continuing effort to reduce DPC latency in my computer to an acceptable level. I have updated all the drivers I can find: video, audio and LAN. I also updated the BIOS to the latest available version. I've also tried running the computer without virus checking running in the background. After all of this the DPC latency as measured by the Thesycon latency checker still looks like a dog's breakfast. The Win7 driver for for the MoBo chipset isn't yet available from Gigabyte yet. The north bridge is an Intel P45 Express and the south bridge is Intel ICH10R. My questions are these: 1) If I manage to find drivers for the MoBo chipset on sites other than Gigabyte's (the tech support person from GB told me they don't know when they'll post their Win7 chipset drivers) are they likely to mess up my system? 2) Does anyone have any other ideas about how to clean up this system? Thanks for your help- it's much appreciated. 73, Leon NT8B System: PowerSDR: v1.18.3 OS: Windows 7 MoBo: Gigabyte EP45-DS3R Processor: Intel Core 2 Quad Video: Nvidia GeForce 8800 GT Ram: 4GB installed OS: MS Windows 7 32 bit PS: Unfortunately the gigabyte tech support person had no idea about the availability of a beta bios that fixes a DPC latency problem _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to hartl...@netpathinc.com _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ Message delivered to arch...@mail-archive.com
