A leaked slide from Chinese website EXP review details some exact specs from the two Devil’s Canyon CPUs that are said to be released shortly. If you have been underwhelmed by the “Haswell Refresh” and its lack of unlocked processors, this might get you going a bit.
Here’s a comparison of the highest end Core i7 and Core i5 Haswell processors as they have progressed during the refresh and upcoming release:
|Family||Model||Base Freq||Turbo Freq||Cores Threads||Cache||TDP|
|Haswell||Core i7 |
|3.5 GHz||3.9 GHz||4/8||8MB||84W|
|Haswell Refresh||Core i7 |
|3.6 GHz||4.0 GHz||4/8||8MB||84W|
|Devil's Canyon||Core i7 |
|4.0 GHz||4.4 GHz||4/8||8MB||88W|
|Haswell||Core i5 |
|3.5 GHz||3.8 GHz||4/4||6MB||84W|
|Haswell Refresh||Core i5 |
|3.5 GHz||3.9 GHz||4/4||6MB||84W|
|Devil's Canyon||Core i5 |
|3.5 GHz||3.9 GHz||4/4||6MB||88W|
As you can see, Haswell Refresh only added 100 MHz to the clock speeds, and that’s it. However the Devil’s Canyon version of the Core i7 brings the base clock all the way up to the former turbo speed – 4.0 GHz, higher than any other Intel processor including Extreme Edition processors. The turbo speed gets pushed to 4.4 GHz. Things aren’t quite as exciting for the Core i5 version, but with the newly improved thermal interface material, it should be expected to reach those speeds – and higher – manually.
Current Haswell CPUs have a hard time going beyond 4.7 GHz or so on air. 5 GHz was just a dream, but it now seems like a possibility. Far too much heat is wasted when Haswell is pushed – you can see this in our latest heatsink review of the Noctua NH-D15. Compare the OC Haswell results to the OC Sandy Bridge-E results, and you can see that there is a certain point where the best coolers barely outperform the worst on Haswell.
A special “Anniversary Edition” unlocked Pentium is supposed to be released around the same time, but isn’t mentioned on this slide.