DDR4-2133: 32 GB Crucial Value RAM
Let's kick this off with DDR4's lowest data rate, 2133 MT/s, with no overclock whatsoever applied. There are no heat spreaders on our Crucial modules. Voltage is set at 1.2 V, representing significant savings compared to DDR3 and even DDR3L.Ideally, that'll translate into less heat and lower power consumption.
At idle, we measure 32 degrees Celsius at the hottest point. Not bad.
Under load, the temperatures hover around 37 degrees Celsius, which is decent as well.
| Power Consumption: Crucial DDR4-2133 | |
|---|---|
| 32 GB (Four Modules) | 11.85 W |
| 16 GB (Two Modules) | 5.94 W |
| 8 GB (One Module) | 2.98 W |
| 4 GB (Rated) | 1.49 W |
DDR4-2666: 16 GB G.Skill Ripjaws
A higher clock rate and red heat spreaders are added to G.Skill's take on DDR4, but the modules are still rated for 1.2 V. How do those changes affect temperatures and power consumption?
At idle, we measure approximately 28 degrees Celsius after 20 minutes. Despite a more aggressive data rate, that's a reduction of four degrees!
Under load, the temperature we measure lands around 33 degrees. Again, that's about four degrees Celsius less.
| Power Consumption: G.Skill Ripjaws DDR4-2666 | |
|---|---|
| 16 GB (Four Modules) | 6.14 W |
| 8 GB (Two Modules) | 3.06 W |
| 4 GB (One Module) | 1.52 W |
DDR4-2800: 16 GB Corsair Vengeance
The data rate increases again, and the heat spreader is now black. Still, Corsair maintains the standard's 1.2 V setting. Unfortunately, the XMP profile for the kit's peak performance level changes the BCLK setting from 100 to 131 MHz, which directly affects the processor's frequency as well.
We measure approximately 28 degrees Celsius at idle after 20 minutes, which is the same four-degree improvement over Crucial's baseline.
The temperature remains at approximately 32 degrees Celsius under load, which represents another slight reduction (despite the highest data rate in our test).
The power consumption we measure from Corsair's DDR4-2800 kit is slightly less than the 2666 MT/s modules as well. In reality, there's basically no difference between the two kits.
| Power Consumption: Corsair Vengeance DDR4-2800 | |
|---|---|
| 16 GB (Four Modules) | 6.09 W |
| 8 GB (Two Modules) | 3.03 W |
| 4 GB (One Module) | 1.51 W |
DDR4 memory offers significantly-reduced power consumption, even at higher data rates. Depending on the kit you end up buying, consumption is down between 25 to 40 percent compared to DDR3.
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- Three New CPUs For Enthusiasts
- X99, LGA 2011-3 and DDR4: Get Ready For A Big Upgrade
- How We Tested Core i7-5960X, -5930K, And -5820K
- Synthetic Benchmarks
- Real-World Benchmarks
- Battlefield 4, Grid 2, And Metro: Last Light
- Star Swarm, Thief, Tomb Raider, And WoW
- Power, In Depth: Stock Clock Rates
- Power, In Depth: Eight and Six Cores at 3.5 GHz
- Power, In Depth: Eight and Six Cores at 4 GHz
- Power, In Depth: Eight and Six Cores at 4.5 GHz
- Power, In Depth: CPU Health at 4.8 GHz
- Measuring DDR4 Power Consumption
- Power Consumption Through Our Benchmark Suite
- Intel Keeps Enthusiasts On Its Most Modern Design With Haswell-E









1000$ is affordable to you ?
Though you have a point here, the guy buying such CPUs most likely will game at above 1080p .. but this would have implied using 2 GPUs at least in the test.
Bit disappointed to not see a comparison with the Xeon E5-1650v2(or 1660v2), as the 2600 is a bit overkill comparing prices. Some of us just need a workstation with ECC ram and not just a free-for-all(ie someone else is paying) Xeon 2600 fest.
1000$ is affordable to you ?
Though you have a point here, the guy buying such CPUs most likely will game at above 1080p .. but this would have implied using 2 GPUs at least in the test.
I have a hunch that we will never see anything like this in the comment sections of AMD reviews. Not sure why
Er, no. No it's not the first eight core processor. It is the first eight-core consumer or Core iN series processor though.
I also don't know of any unofficial 8-core processors either.
Intel Core i7-5960X, -5930K, And -5820K CPU Review: Haswell-E Rises : Read more
I was wondering how often you writers read the comments? Just wondering.
Gee. DDR4 save about 5 W with 4 modules. And i was worried of pwer consumption when i overclocked my FX 8350 at 4.7 GHz
Ya, the 5820K really stands out, especially in comparison to Intel's previous lowest SKU processors on X79. For the first time the x820 actually looks like a great option to go with. It's the same as a 3960X in clock speed and core count, except it's Haswell which seems to result in a 10-15% performance boost, and it's over $600 cheaper. The only drawback might be if you have a lot of high bandwidth PCIe cards, but I doubt that'll be an issue for most enthusiasts.
And omg that price:
http://www.microcenter.com/product/437203/Intel_Core_i7-5820k_33_GHz_LGA_2011_V3_Tray_Processor
... I love Microcenter.
THe improvement in multi-threaded workloads are good. It is the biggest improvement per generation we have seen since gulftown
I'm running a 780 ti and Gskill Ripjaw 1600 RAM.
How would the cost of said systems compare, assuming we could create them as equal as possible? Would the performance benefits of the 5820 justify the additional cost?
I'm still running on my old x58 i7 920, but it's starting to BSOD on CPU intensive games (although I suspect its my mobo that's the issue)...
I wanted to build a new system this year, but don't want to make the same mistake I did with the x58 and be left with something that simply can't be upgraded after a year or so. At the same time, I don't want to buy into old tech if that too won't last..
I have had a good run with my x58 mind, but am wary Intel may do what they did with my Gen 1 i7, and change something fundamental with the platform/DDR4 to mean I'll be 'stuck' with whatever I buy now...