My vote is for the Core 2 Duo. One with at least 4 MB L2 cache. At some point in the not so distant future, I believe that software changes will make better use of dual core processors. Bob has already made tweaks to libfftw3f-3.dll to make better use of dual core machines.
Look at the Intel E6600 chip. -Tim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Dennison Sent: Sunday, September 23, 2007 7:32 PM To: [email protected] Subject: Re: [Flexradio] Up and Running Hi to Tim, Ken and Ed, Many thanks to all of you for responding. Clearly the Celeron is on its way to the junk box. Back before I bought a box especially for the SDR1K to be, I cruised the Website looking for advice on what processor to buy, the site only said greater than 3Ghz. If the tasks are well suited to dual processing, a 1.6Ghz dual core maybe just makes 3Ghz total. However, even if PowerSDR is locked into one core, the sig processing only gets 1.6Ghz max. Reading the three emails I see one neutral on replacement type, one in favor of a dual core and one in favor of a Pentium P4. So, given a socket 775, what's "best" Celeron replacement? I'm thinking best price vs. performance? Thanks in advance, Rob ;o)~ AB7CF Ps. Man I remember when it was great fun creating flight control systems for missiles using 10Mhz processors and DARPA spent a bucket creating a 25Mhz processor... On Sun, 23 Sep 2007 14:02:17 -0500 "Ed Toal" <[EMAIL PROTECTED]> writes: > > Hi Rob, > > I started using my 2.4ghz Celeron machine to get my SDR1K with an > FA-66 > running and had similar results. In my case the CPU usage was between > 40 and 60%. When I moved the radio to my station machine, a dual core > Athalon at 2.1ghz the CPU usage dropped to 10 to 20% and the audio > results were much better. > > So then I dropped a 3.0ghz P4 in place of Celeron and put the radio > back on that machine. The CPU usage was much better and no audio > problems. > As I remember, the CPU usage was in the 30% range. The CPU was about > $80 at Newegg.com. > > That proved to me that it was more than advertised speed, the P4 is a > tad quicker but doing things much more efficiently. > > No more CELERONS in this household! > > The FA-66 here runs at 192khz with buffer size set at minimum and WDM > and ASIO set for smaller. > > Yes, you will see a spectrum display bulge below the tuned frequency, > but it won't bother you. As well, the whole display makes a rise and > fall out from the center. Again, this won't affect anything. It > seems like this could be compensated for by software, but I suspect it > really isn't worth the time and effort to do so. > > Ed N9MW > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Rob Dennison > Sent: Sunday, September 23, 2007 11:50 AM > To: [email protected] > Subject: [Flexradio] Up and Running > > Hi All, > > Have my SDR1K up and running. First contact was CE3/VE7SV. Heavy > lifting is over. With a plan jane installation using an FA-66 (no > special RFI or common mode treatments) everything is working very > well. > Love the radio... better than dared I imagine. > > So now I'm into fine tuning with a few questions: > > 1. I'm using an XP Pro box with a 3.46 Ghz Celeron D socket 775 and > 1 > Gig of Ram. Running PowerSDR 1.10.2 and DXLabs only. > > With a 192khz sampling rate I'm experiencing dropouts (even when > running stand alone.) Running PowerSDR v1.10.2 stand alone and using > a 192khz sampling rate CPU usage averages about 35%. Dropouts occur > often and can be forced by dragging the powerSDR window. When running > with DXLabs they are frequent (enough to interfere with CW reception > at about 22 wpm and to interfere with CWX auto CW transmission in the > same speed > range.) > CPU > utilization still runs about 35% with peaks above 75 %. Dragging any > window will cause serious drop outs. > > Using 96Khz sampling, CPU utilization drops to ~25% with very few if > any dropouts stand alone. There are dropouts with DXLabs and > utilization occasionally bouncing up to 31% with occasional excursions > into the 70% range. Dragging a window moves utilization right up to > 100%. > > I'm currently using the 96Khz sampling rate. What to do? Buy a dual > core? Pour on the memory? Both? > > 2. I calibrated everything which was certainly necessary. > > Am a little uncertain about the Level CAL results. I used a HP 8601A > set to -50dbm. When I entered -50 in the Level (dbm) control the > results were clearly not right (a noise level at -55dbm.) When I > entered -100 in > the Level (dbm) control the results seem "reasonable?" With the > generator connected the display shows -50 dbm right smack on. With > the > antenna connected the noise level is about -110dbm and S5. (The > noise > level is very high in my neighborhood, sigh...) With a dummy load > connected right to the box the noise level is about -130dbm and S2. > > > Is this about right? > > 3. Mostly out of curiosity, when using the panadapter, there's always > big amplitude bulge about 10Khz below the center frequency? > > I assume it's some sort of processing artifact? > > Other then these relatively small issues everything seems going fine. > Congratulations on producing a marvelous radio... > > Rob > AB7CF > > > > _______________________________________________ > FlexRadio mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio > Homepage: http://www.flex-radio.com/ > > > > _______________________________________________ FlexRadio mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
