Videomaker did a review of the Z800, in which they said that the second CPU made no difference at all in their renders on Premiere. They said they could turn the second CPU on or off in the BIOS, or even remove it: the render time was the same.
https://www.videomaker.com/article/14391/
They recommended the Polywell system as being faster:
https://www.videomaker.com/article/14387/
That made me really curious, so I started asking questions. Why would a dual core Xeon not be faster than a single core?
I called HP, and finally got connected to a tech rep named ‘Jesus’ (“Hay-soos”). He said the only people who really need Z800’s are people who do full-on 3D (like Dreamworks). He said that the reason there was no performance difference with CS4 (whether the second processor was on or off) was probably just that the machine did not get taxed hard enough.
He said that the way HP set their architecture up is that the primary processor does not send anything to the second processor unless it starts to reach a certain load point. Since regular video rendering does not work the processor hard enough (!), the primary processor never ‘calls for backup.’
Jesus recommended that unless I was going to do some serious full-on 3D work (like ‘Monsters vs. Aliens’ or ‘Prince of Egypt’ type stuff), or maybe some oil-and-gas exploration (which I’m not planning on), that I would be just as well off with a fast single-processor model, like a 3.2 GHz Z400, and a graphics card with 1GB to 1.5GB RAM.
I got a good laugh at myself out of this whole thing, because I don’t do that kind of work, and don’t have that kind of money anyway. Right now my Core-Duo Quad at 3.0GHz seems to be doing the job, even though I have to run the Preview Window on ‘fuzzy’ (even with Cineform). But I am already looking forward to the day when prices come down on the as-yet-to-be-released Core i9, which is supposed to have six CPU cores. Or maybe someone will again release a ‘skulltrail edition’ motherboard, so we can put multiple cores on the same motherboard?
Anyhow, the Z800 is not supposed to be optimized for ‘regular’ video editing, even if it is rock stable, even when it is half asleep.
I sure hope that helps someone.
Norman Willis
http://www.nazareneisrael.org