The Intel Broadwell Desktop Review: Core i7-5775C and Core i5-5675C Tested (Part 1)
by Ian Cutress on June 2, 2015 7:45 AM ESTTest Setup
As we mentioned in our introduction, Intel's 9-series chipset were designed from the start to allow future compatibility with Broadwell. As a result with a BIOS update we're able to drop these processors into our existing MSI and ASUS Z97 boards, though not without some pre-release BIOS teething issues.
| Test Setup | |
| Processor | Intel i7-5775C, 4C/8T Intel i5-5675C, 4C/4T |
| Motherboard | MSI Z97A Gaming 6 ASUS Z97 Pro |
| DRAM | G.Skill RipjawsZ 4x4GB DDR3-1866 C9 at DDR3-1600 |
| Low End GPU | Integrated ASUS R7 240 2GB DDR3 Dual Graphics with R7 240 |
| Mid Range GPU | MSI R9 285 Gaming 2GB MSI GTX 770 Lightning 2GB |
| High End GPU | MSI R9 290X Gaming LE 4GB ASUS GTX 980 Strix 4GB |
| Power Supply | OCZ 1250W Gold |
| Storage Drive | Crucial MX200 1TB |
| Operating System | Windows 7.1 64-bit, Build 7601 |
| CPU Cooler | Cooler Master Nepton 140XL CLC |
Many thanks to...
We must thank the following companies for kindly providing hardware for our test bed:
Thank you to AMD for providing us with the R9 290X 4GB GPUs.
Thank you to ASUS for providing us with GTX 980 Strix GPUs and the R7 240 DDR3 GPU.
Thank you to ASRock and ASUS for providing us with some IO testing kit.
Thank you to Cooler Master for providing us with Nepton 140XL CLCs.
Thank you to Corsair for providing us with an AX1200i PSU.
Thank you to Crucial for providing us with MX200 SSDs.
Thank you to G.Skill and Corsair for providing us with memory.
Thank you to MSI for providing us with the GTX 770 Lightning GPUs.
Thank you to OCZ for providing us with PSUs.
Thank you to Rosewill for providing us with PSUs and RK-9100 keyboards.
Load Delta Power Consumption
We'll start things off with a look at power consumption. Power consumption was tested on the system while in a single NVIDIA GTX 770 configuration with a wall meter connected to the OCZ 1250W power supply. This power supply is Gold rated, and as I am in the UK on a 230-240 V supply, leads to ~75% efficiency > 50W, and 90%+ efficiency at 250W, suitable for both idle and multi-GPU loading. This method of power reading allows us to compare the power management of the UEFI and the board to supply components with power under load, and includes typical PSU losses due to efficiency.
We are reporting the power consumption difference when idle and during an initial OCCT load. This is slightly skewed by the adjustment up the efficiency chain of our power supply, showing lower power CPUs consuming a little more, but despite this the qualitative comparison is a still a good place to start.
Despite our test being almost qualitative, it is exciting to see that in our power consumption limit test both CPUs score around their TDP values.
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jimbo2779 - Tuesday, June 2, 2015 - link
I could be wrong but I doubt the difference will be huge or even noticeable In most games and setups.Refuge - Tuesday, June 2, 2015 - link
I wouldn't purchase one of these with those intentions to be honest. They are DX11.5 not 12, and we've yet to see how well DX12 makes all the dGPU's and iGPU's play yet in the real world.But I also can't afford to be that early adopter anymore either.
XZerg - Tuesday, June 2, 2015 - link
it would be good to note the month each series of the cpus were launched as that would really tell the story better.MrSpadge - Tuesday, June 2, 2015 - link
Ian, a point for the OC review: Broadwell-C is listed as only supporting DDR3L-1600. You even underclock your memory for the stock review. What about higher memory speeds and voltages? Is it as painless as with older K series CPUs? The fat iGPU can certainly use more bandwidth despite having Crystal Well. And anyone profiting from Crystal Well as CPU cache could also use more bandwidth. Einstein@Home is a prime example for this.watzupken - Tuesday, June 2, 2015 - link
I feel Intel is creating way too many models with slight differences.MrSpadge - Tuesday, June 2, 2015 - link
I don't disagree, yet your comment seems oddly out of place under the review of 2 chips with features we have never seen combined before:14 nm Broadwell (energy efficient, better IPC than Haswell)
overclockable (the stock speeds are far too low, yet it already sometimes beats or ties the mighty i7 4790)
Crystal Well (it's going to rock in some applications)
twice as much GPU power than ever before in a socketed configuration (it's going to be a fine OpenCL 2.0 number cruncher for some use cases).
AtenRa - Tuesday, June 2, 2015 - link
At what settings did you run memory on the AMD APUs and why only 720p on the integrated Gaming benchmarks ???Novacius - Tuesday, June 2, 2015 - link
I'd like to see a comparison to Haswell's GT3e, too. Will there be one?CFTheDragon - Tuesday, June 2, 2015 - link
Anyone know a US Retailer with the i7-5775C in stock? I have everything else ready for my build, Motherboard, RAM, Gfx Card, etc. Just need the CPU and I have been patiently waiting for these.Refuge - Tuesday, June 2, 2015 - link
They shouldn't be available publicly until about the end of the month. But you may find some early ones if you keep an eye on the right channels.