100% cpu with nero

hawklord · Apr 12, 2006

hi all, i have nero 7, when i transcode avi and burn to disk with startsmart my cpu goes to 100%, could this be an atapi controller problem (maybe wrong word), my primary is set to DMA and my secondry is set to PIO, i have a cd-rw set at slave and dvd-rw set at master on my secondry,
i have w2kpro, 512 pc3200 and celeron 3.06GHz proc, ta

Adrynalyne · Apr 12, 2006

Its normal for burning applications to peg CPU useage (from my experience), unless you have a dual core CPU.

Just Playin · Apr 12, 2006

Transcoding is a CPU intensive process. Setting your secondary with the CD and DVD drives to DMA might help with burning and disc access times but it will not reduce the load transcoding puts upon your processor. Nero does have the option to set CPU priority if you have other programs which you would like to take priority in processing over Nero's transcoding.

hawklord · Apr 12, 2006

do i just change it in device manager ? and is it reversable (just in case)

Just Playin · Apr 12, 2006

DMA vs PIO mode
Traditionally, CD-ROM drives have used Programmable Input Output (PIO) rather than Direct Memory Access (DMA) for data transfer. This was favoured for the earlier designs because hardware implementation is simpler and adequate for devices that require low transfer rates. The drawback is that the CPU must mediate the transfer of data, often byte by byte. As the data rate of CD-ROM drives has risen, so has the load on the CPU, to the point where 24-speed and 32-speed drives can completely saturate CPU utilisation in PIO mode. The severity of CPU loading depends on a number of factors, such as the exact PIO mode used, the PC's IDE/PCI bridge design, the CD-ROM buffer size and design and the CD-ROM device driver.

DMA data transfer is always more efficient and requires only a few per cent of CPU time. It uses hardware to control data transfer directly to system memory, and only require initial memory allocation and minimal handshaking from the CPU. A further advantage is that performance is device rather than system dependent. DMA-capable devices should give consistent performance, regardless of the system they're attached to.

DMA has been a standard feature of most SCSI systems for some time, but has only recently been common for IDE devices and interfaces. Windows has been a major drawback to DMA implementation in many desktop PCs, and DMA drivers for the Intel PIIX range of IDE/PCI bridge chips have only been included since the Windows 95 OSR2 and OSR2.1 OEM service releases. Even so, DMA is often not enabled in systems equipped with these operating system versions, either due to ignorance or because of concerns about overall system stability
Click to expand...

Yes, in device manager through the properties window for your ATA/IDE drives. DMA will give you better drive performance and relieve some of the CPU load during the actual burning process if your drives support DMA, that is. And yes, you can change back though I would advise against it.

hawklord · Apr 12, 2006

i understood that (just) but in plain english is it worth changing to DMA, all other burning is ok - its just when i am transcoding

augiedoggie · Apr 12, 2006

hawklord said:

hi all, i have nero 7, when i transcode avi and burn to disk with startsmart my cpu goes to 100%, could this be an atapi controller problem (maybe wrong word), my primary is set to DMA and my secondry is set to PIO, i have a cd-rw set at slave and dvd-rw set at master on my secondry,
i have w2kpro, 512 pc3200 and celeron 3.06GHz proc, ta
Click to expand...

I asked the same thing a few days ago and no one answered. Anyways, some good suggestions here which I'll try. BTW, I have an x64 rig and it pins my Venice 3000 too!

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100% cpu with nero

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