Question

[DizZa]

Hey all
I just ran a stress test in ATI tray tools utility, and I noticed that when doing it my Logical Core #2 was working at 40%.

Questions:
Direct X 10 makes the processor work less hard for video card... Right?

Would a dual core processor make single threaded 3d applications run 40% faster? (if CPU was bottleneck).

[ctjoyce]

Well I guess the short answer is going to be no.

DX10 brings the ability for designers to write code so that games know to use the first or second core to run parts of themselves. So DX10 dosn't take any strain off the video card, just redistrubtes the processer load over multi cores.

As far as getting a dual core so that your single threaded apps run 40% faster isn't really going to give you a 40% preformance increase. The processer spreads the load of a large process across its cores (logical or physical) evenly so that you get the best preformance. So having a dual core processer will speed up things like encodeing (things that single cores tend to be slow at), however just because its a single threaded app dosn't mean that the processer wouln't use only one core to run it.

Cheers
Cameron

[congo]

What I'd like to know is, 40% of what? Is it the obvious and truly using 40% of one core, or is the figure misleading and does it mean40% of total processing power, ie... 40% of the combined power of both cores?

I see a similar thing happen when I try to get the cpu usage of an e6600 an Efriend of mine has. We run the same software and I'm running at 100% core, and he is running 50%, when I think it's impossible that one of his cores is idling along at 50% running this particular software. It looks as if the cpu usage reported actually takes into account the total power of both cpu's! This is very misleading if true, it simply makes dual core systems look good when they are probably performing at less than their single cored counterparts.

[DizZa]

[quote]Is it the obvious and truly using 40% of one core, /quote]
I have a graph for each logical core on my computer, which means two graphs, not just one shared between.

So yes, it is 40% of one logical core.

[congo]

I don't swallow it somehow, I've heard a lot of reports of guys with dual cores showing 50% usage, when I know the cores are actually slower than their single core cousins, yet the software magically says different, even though it only utilises a single core.

If your cpu is cruising along at 40% usage during a stress test, where is the stress lol!

[NicksFXHouse]

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