# Calculate computer performance increase?

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• Oct 8th 2011, 09:39 PM
ziggy
Calculate computer performance increase?
I'm trying to figure out how to calculate the increase in performance between PC configurations.

For instance:
PC X takes 0:13:15 (h:mm:ss) to render a 5 minute video
PC Y takes 0:04:31 (h:mm:ss) to render the same 5 minute video

Basically, how much faster is PC Y than PC X in this situation?

It's confusing for me because the new value is lower than the original. I tried the formula

(increased amount - original amount) / original amount x 100

but it gives me a number that doesn't look right.

I hope I can get an answer to this, I'm starting to feel dumb (Headbang)
• Oct 8th 2011, 09:54 PM
CaptainBlack
Re: Calculate computer performance increase?
Quote:

Originally Posted by ziggy
I'm trying to figure out how to calculate the increase in performance between PC configurations.

For instance:
PC X takes 0:13:15 (h:mm:ss) to render a 5 minute video
PC Y takes 0:04:31 (h:mm:ss) to render the same 5 minute video

Basically, how much faster is PC Y than PC X in this situation?

It's confusing for me because the new value is lower than the original. I tried the formula

(increased amount - original amount) / original amount x 100

but it gives me a number that doesn't look right.

I hope I can get an answer to this, I'm starting to feel dumb (Headbang)

The processor speed is inversely proportional to the time taken for the standard task. So use 1/t rather than time in your calculations.

CB
• Oct 8th 2011, 09:57 PM
ziggy
Re: Calculate computer performance increase?
OK, now I'm an idiot.

Can you explain any further?
• Oct 9th 2011, 12:57 AM
e^(i*pi)
Re: Calculate computer performance increase?
Quote:

Originally Posted by ziggy
OK, now I'm an idiot.

Can you explain any further?

First get rid of the minutes and seconds format, it's much easier to work with only one unit.

PC X has a processor speed of \$\displaystyle \dfrac{k}{795}\$ and PC Y has a speed of \$\displaystyle \dfrac{k}{271}\$ where \$\displaystyle k\$ is a constant.

Can you continue?