Subscribe / Unsubscribe Enewsletters | Login | Register

Pencil Banner

Intel Core i7-5775C review: The unwanted desktop Broadwell has one neat trick

Gordon Mah Ung | Aug. 4, 2015
The narrative is already in place on Intel's new Broadwell for desktop CPU: It's the chip no one wanted.

3D rendering

Next up, we used Cinebench R15, a test based on Maxon's Cinema 4D animation package. It's a great benchmark that is pure CPU and heavily multi-threaded. The result is no surprise, as 3.7GHz even with the newer Broadwell cores can't beat 4.4GHz. 

Work performance

Our next test is PCMark 8, which simulates various computing tasks broken down into Work, Home and Creative categories. Work measures general Office Drone tasks, Creative throws in photo, video and light gaming, while Home factors in more casual gaming. 

The first result is from PCMark 8 Work Conventional. Again, the Core i7-5775C's lack of clock speed shows even on these basic tasks that a Celeron could run.

Creative performance

Once PCMark 8 mixes gaming performance into this test, the Broadwell makes a nice comeback. The result is similar in the PCMark 8 Home test, which adds gaming into the mix and puts the Broadwell in a much better light than the Haswell, thanks to its better gaming capability.

Chess performance

The Fritz 12 Chessbenchmark measures a CPU's ability to calculate chess moves. The yard stick is a 1GHz Pentium III. A score of 10 would mean the tested CPU is 10 times faster than a 1GHz Pentium III performing the same tasks. The results again don't look great for the Broadwell desktop part. Even though we know Broadwell's cores are maybe five percent more efficient doing the same task, it's not enough to compensate for the higher clock speeds of the Core i7-4790K chip.

Overall meh right? 

If you're thinking 'stick a fork in Broadwell, and call it a day,' you need to read on to see where the Core i7-5775C is better than Haswell.

Where Broadwell really shines

On the compute side, the Broadwell desktop part can't hang with the higher clock speeds of the Haswell chip but what happens when the GPU is the primary driver of the task? It's a different situation.

For reference, I'm going to toss in the brand-new "Godavari" AMD A10-7870K chip. It's technically a 12-core CPU by AMD's standards, but that really means it's a quad-core CPU with eight GPU cores in it. The x86 cores run at 3.9GHz to 4.1GHz, and the integrated Radeon R7 graphics cores buzz along at 866MHz. 

While AMD's x86 performance has been weak sauce these last few years, the graphics performance has rained pain on Intel's just as badly. The best part of AMD's Godavari is its price. It's a chip with a $137 list price, but it's actually selling for more, at $149. That's less than half of either Intel CPUs. Some may cry foul at using the Godavari because it's so much cheaper, but I think it's fair to put the APU's graphics performance in context.


Previous Page  1  2  3  4  5  Next Page 

Sign up for Computerworld eNewsletters.