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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extide - Tuesday, June 2, 2015 - link
Have you ever overclocked a CPU before? Those limits are easily raised, and a properly O/C'd build will not throttle...DCide - Tuesday, June 2, 2015 - link
It's hardly elite - just live video. But if the CPU saturates or crashes, everybody will know.I'm not skilled at overclocking. But for this application, stability is paramount. I wouldn't want to push it close to the limit, only to have it crash 5 hours into the stream. When I tested 4-core CPUs I had to run at low resolutions, or else the video would stutter. And I even at that I couldn't use all the features of the application.
With the same low-profile case and the same heatsink/fan the 4790K would throttle in less than 30 minutes while the 5820K and 5960X never would. They were all running at 4GHz. I'm sure someone more skilled could make all 3 CPUs run faster. But the 8-core is still going to be about twice as fast as the 4-core.
On the topic of the new CPUs, I won't be surprised if they O/C well enough to make them dominate the previous generations. But they won't be a match for the 2011-3 CPUs.
vision33r - Tuesday, June 2, 2015 - link
If you're into server workloads, 8 cores would nice. For gaming, more cores only adds more heat and hardly any benefit to gaming performance. For gaming, quad-core is good enough with no integrated GPU. All this integrated GPU stuff is just a waste of resources. Most of us into performance and gaming don't want the extra heat and power consumption.FlushedBubblyJock - Sunday, June 14, 2015 - link
If the kiddies can play WoW on it, amd and intel are happy. They will never stop.Galatian - Tuesday, June 2, 2015 - link
Would like to see some Quicksync Benchmarks! Anand noted fast Quicksync performance on the Iris Pro 5200, so I sure would like to see a) the differences between GT3e (Haswell) and GT3e (Broadwell) and b) the differences between GT2 (Haswell) and GT3e (Broadwell).Refuge - Tuesday, June 2, 2015 - link
I think that is coming in part 2 judging by the first two pages of the article.Kevin G - Tuesday, June 2, 2015 - link
I'll second the request for QuickSync testing. I do a bit of video editing with Vegas and do some bulk conversions with Handbrake so I have a keen interest on this topic.dj_aris - Tuesday, June 2, 2015 - link
I'd like to see the 65w 4770R in the charts to measure the delta over a a generation (okay half a generation). Meanwhile, considering that i5-5675C is $276 but games much worse than a Haswell Pentium + a decent $200 discrete card I really don't see the point in traditional desktops. The only scenario I see fit would be in a tiny case using a super low profile thin mini-ITX board, so as to create a system similar to, say, an Alienware Alpha. But wait, there aren't any thin mini-ITX H or Z97 boards. Whereas back with Haswell we had thin mini boards but only non-Iris iGPUs. Oh Intel, there's always a part missing!DCide - Tuesday, June 2, 2015 - link
I think you mean you don't see the point for a gaming desktop. A Pentium + $200 dGPU would be a poor choice for most traditional desktops.Mech0z - Tuesday, June 2, 2015 - link
With DX12 supporting multiGPU much much better, could it be theorized that these will be very good for DX12 games together with a dGPU?