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Solve : Overclocking a sound card to 3.5MHz?? |
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Answer» Is it possible to overclock a sound card (or at least the DAC) to 3.5MHz so that it is possible to transmit composite video signals. I have an RF modulator, and an amplifier is really easy to make, so I was hoping to find a way to CREATE my own TV transmitter. I realize that only low-power is legal. The PC could do all the encoding processing (I mean, it is a computer...). The point is not performance, they make graphics cards for that, the point is proof of concept. Quote Is it possible to overclock a sound card i suppose its possible, HOWEVER i cannot assist you in this for i have NEVER heard of anyone even attempting to overclock a sound card. OK, so I guess I'll be trying something new. If I succeed I will report. If not, WELL... Quote from: homer on May 09, 2008, 09:39:26 PM QuoteIs it possible to overclock a sound card If overclocked high enough they turn into vid cards... Quote from: patio on May 10, 2008, 06:23:53 AM Quote from: homer on May 09, 2008, 09:39:26 PMQuoteIs it possible to overclock a sound card That's quite the point. However 640x480x60 = 18MHz, Composite = 3.5MHz. Easier to clock it to 3.5 than 18. Actually, It would be possible to have 3 composite output channels with a video card, and 2 with a sound card. Cuz, aren't vid cards and sound cards basically just DACs, or even a modem, but that's not nearly fast enough, or the right kind of DAC.What's a DAC? Digital to Analog Converter?Ok, from what I know on the subject (because I know people who have tried it) you can "overclock" a sound card by increasing the FSB (front side bus) speed. However, it resulted in worse quality sound. Cracking and popping a lot. I would say it is unwise and could potentially damage the card. As for overclocking the sound card itself, I've never heard of that being known or of any way to go about doing it. It's not by any means a regular practice. What would be the point? It wouldn't increase sound performace or anything. Not exactly like overclocking a CPU or VPU. For the situation you're thinking about, it might help, but like I said, I know of no way to do it.How about doing it like you would a Nintendo DS? By replacing the clocking circuit. Quote from: linuxlover on May 10, 2008, 04:03:52 PM How about doing it like you would a Nintendo DS? By replacing the clocking circuit. Now you're getting into things I don't know about. I've never tried modifying a sound card like that. It's worth some research, but be careful what you do or you might end up breaking something more important or shorting something out. What exactly is your end goal? There might be another way to get what you want with more conventional means. Quote from: quaxo on May 11, 2008, 12:32:28 AM Quote from: linuxlover on May 10, 2008, 04:03:52 PMTo make a programmable RF transmitter. There are video cards for such things, I know. It's just a personal project. I was thinking maybe I coiuld use a video card instead, because a video card runs at 18MHz native and has three channels. One for serial data (to control the amplifier) one for audio, and one for video (composite). However, how would I get it to the precise freq of 3.58xxxxxx...How about doing it like you would a Nintendo DS? By replacing the clocking circuit. |
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