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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Peichen - Tuesday, June 2, 2015 - link
Intel is ridiculous in what way? You know Skylake is out in 2 months and that's why you are waiting for it. If you think Skylake isn't going to deliver why bother to wait? Intel haven't failed to deliver since Pentium M unlike AMD which is just one dropped ball after another. Sit tight and is gamers will have Skylake in no time. Today's release is for system builders that need a stopgap product, not us.Khenglish - Tuesday, June 2, 2015 - link
Why is the L3 cache only 6MB? Is 2MB disabled, or did intel cut the L3 size to reduce latencies since there is now an L4?Ryan Smith - Wednesday, June 3, 2015 - link
i5 processors typically have some of their L3 cache disabled.HollyDOL - Tuesday, June 2, 2015 - link
First time in years I am not sure what to think about this new cpu... Is it good? Is it delivering? On some things it quite rocks, on other seems like unfinished product/partial release... guess following months will tell...Valantar - Tuesday, June 2, 2015 - link
Just wondering: As previous Iris Pro vs. other integrated graphics reviews have shown Iris Pro to perform substantially worse at higher resolutions, are more tests above 720p coming in part 2? Or are you just going for whatever setting gets reasonably playable frame rates?sonicmerlin - Tuesday, June 2, 2015 - link
Why the frack didn't you test a midrange card at 720p so we can compare it to Iris Pro? They can't even do 30 fps at 1080p on most of the games you tested. What were you thinking?!bobhays - Tuesday, June 2, 2015 - link
On the low end gaming benchmarks for GRID, when benchmarking the r7 240 the minimum FPS for the A10-7700k is higher than the average FPS which doesn't make sense.bobhays - Tuesday, June 2, 2015 - link
Also wish they had tested dual graphics with a r7 240. The A10 ~ 130 + r7 240 ~ 70 = 200. That way we could compare a 200 dollar APU + GPU vs Intels new 200 dollar cpu'sOrphanageExplosion - Wednesday, June 3, 2015 - link
I've tried it with an A8 7650K and I can tell you that the frame-pacing is horrible, and the variance in frame-rate is stupendous. Crysis 3, 720p, low - 60fps looking in one direction, spin around on the spot and you're looking at 20-30fps looking in another direction.ryrynz - Wednesday, June 3, 2015 - link
Might wanna fix up that 128MB eDRAM comment Ian.