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CS4 jumpy, glitchy playback
Hello,
I’ve had problems with jumpy playback of full HD video in the preview on Premiere Pro CS4. My pc is a new Core i7 940 2.93GHz CPU based system with a WD Velociraptor HDD. It’s very fast and I’ve been overclocking to 3.2GHz.
I read some post where someone mentioned overclocking as causing jumpy playback, so I took the overclocking off and this seems to have improved it. Anyone else had problems or noticed this? My system isn’t over-heating or unstable whilst overclocked.
Thanks
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3 Replies
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Overclocking doesn’t just cause an increase in heat, it also increases the level of noise within the CPU core (just like gain on a video camera), and that’s usually where the instability comes from.
Vince Becquiot
Kaptis Studios
San Francisco – Bay Area -
Hello,
I haven’t noticed instability anywhere else. I’m wondering if slight changes in the clock speed (which the motherboard performs automatically as part of the overall speed and power management) are affecting Premiere’s playback as it seems to jump back a few frames. Some experimentation to do.
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I’m not convinced it’s overclocking that’s the problem. With or without it’s the same. I’m wondering if it’s the processor using SpeedStep that’s causing instability, but I’m not convinced of that either. I’ve noticed that the problem’s worse with rendered video. My system is a Core i7 940 2.93GHz (stabiliy overclocked to 3.35GHz) with a third full WD Velociraptor HDD running at 10K rpm, 3GB of DDR3 memory, I’m running on Windows XP Pro. I’ve got plenty of power to edit and play HD video without bottlenecks.
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