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Re: 8 core or 12 core?

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Erik Lindahl
Re: 8 core or 12 core?
on Feb 6, 2014 at 12:53:56 pm

[Oliver Peters] "Or, if you don't believe in the future of 4K mastering and don't use FCP X near-exclusively, you could go with the 6-core and D500. Faster processors than the 8 or 12-core."
This isn't really true. Even if it gets a bit messy with base clock and turbo clock speed of the new MacPro's it virtually looks as follows:

If 1 core is used
- 4-Core = 100% CPU speed
- 6-Core = 100% CPU speed
- 8-Core = 100% CPU speed

- 12-Core = 90% CPU speed

If 2 cores are used
- 4-Core = 100% CPU speed
- 6-Core = 97% CPU speed
- 8-Core = 103% CPU speed
- 12-Core = 86% CPU speed

If 4 cores are used
- 4-Core = 100% CPU speed
- 6-Core = 97% CPU speed
- 8-Core = 95% CPU speed
- 12-Core = 86% CPU speed

If 6 cores are used
- 4-Core = 100% CPU speed
- 6-Core = 146% CPU speed
- 8-Core = 138% CPU speed
- 12-Core = 122% CPU speed

If 8 cores are used
- 4-Core = 100% CPU speed
- 6-Core = 146% CPU speed
- 8-Core = 184% CPU speed
- 12-Core = 162% CPU speed

If 12 cores are used
- 4-Core = 100% CPU speed
- 6-Core = 146% CPU speed
- 8-Core = 184% CPU speed
- 12-Core = 243% CPU speed

The 8-core will perform similarly to the 4- or 6-core offerings. There might be cases where the 6-core is faster than the 8-core but quite seldom.

The 12-core will only be fastest if 10 or more cores are fully saturated. This is quite uncommon in most tasks but for example video encoding or 3D-rendering can, with relative ease, saturate the machine I think.

Price / performance I think the 6-core probably beats the 8-core but on the 8-core you have similar performance in most tasks and decent multithreaded tasks should be upwards 25% faster.


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