The Intel Haswell-E CPU Review: Core i7-5960X, i7-5930K and i7-5820K Tested
by Ian Cutress on August 29, 2014 12:00 PM ESTLoad Delta Power Consumption
Power consumption was tested on the system while in a single MSI GTX 770 Lightning GPU 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 under 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 take the power delta difference between idle and load as our tested value, giving an indication of the power increase from the CPU when placed under stress. Unfortuantely we were not in a position to test the power consumption for the two 6-core CPUs due to the timing of testing.
Because not all processors of the same designation leave the Intel fabs with the same stock voltages, there can be a mild variation and the TDP given on each CPU is understandably an absolute stock limit. Due to power supply efficiencies, we get higher results than TDP, but the more interesting results are the comparisons. The 5960X is coming across as more efficient than Sandy Bridge-E and Ivy Bridge-E, including the 130W Ivy Bridge-E Xeon.
Test Setup
| Test Setup | ||||
| Processor |
Intel Core i7-5820K Intel Core i7-5930K Intel Core i7-5960X |
6C/12T 6C/12T 8C/16T |
3.3 GHz / 3.6 GHz 3.5 GHz / 3.7 GHz 3.0 GHz / 3.5 GHz |
|
| Motherboard |
ASUS X99 Deluxe ASRock X99 Extreme4 |
|||
| Cooling |
Corsair H80i Cooler Master Nepton 140XL |
|||
| Power Supply |
OCZ 1250W Gold ZX Series Corsair AX1200i Platinum PSU |
1250W 1200W |
80 PLUS Gold 80 PLUS Platinum |
|
| Memory |
Corsair 4x8 GB G.Skill Ripjaws4 |
DDR4-2133 DDR4-2133 |
15-15-15 1.2V 15-15-15 1.2V |
|
| Memory Settings | JEDEC | |||
| Video Cards | MSI GTX 770 Lightning 2GB (1150/1202 Boost) | |||
| Video Drivers | NVIDIA Drivers 337.88 | |||
| Hard Drive | OCZ Vertex 3 | |||
| Optical Drive | LG GH22NS50 | |||
| Case | Open Test Bed | |||
| Operating System | Windows 7 64-bit SP1 | |||
| USB 2/3 Testing | OCZ Vertex 3 240GB with SATA->USB Adaptor | |||
Many thanks to...
We must thank the following companies for kindly providing hardware for our test bed:
Thank you to OCZ for providing us with PSUs and SSDs.
Thank you to G.Skill for providing us with memory.
Thank you to Corsair for providing us with an AX1200i PSU and a Corsair H80i CLC.
Thank you to MSI for providing us with the NVIDIA GTX 770 Lightning GPUs.
Thank you to Rosewill for providing us with PSUs and RK-9100 keyboards.
Thank you to ASRock for providing us with some IO testing kit.
Thank you to Cooler Master for providing us with Nepton 140XL CLCs and JAS minis.
A quick word to the manufacturers who sent us the extra testing kit for review, including G.Skill’s Ripjaws 4 DDR4-2133 CL15, Corsair for similar modules, and Cooler Master for the Nepton 140XL CLCs. We will be reviewing the DDR4 modules in due course, including Corsair's new extreme DDR4-3200 kit, but we have already tested the Nepton 140XL in a big 14-way CLC roundup. Read about it here.
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Ian Cutress - Monday, September 1, 2014 - link
When I tested the 5930K/5820K, the motherboard BIOSes were still very early alpha builds and did not allow overclocking. If I can get these CPUs in again to test (they had to be sent back), I will do some overclocking results for sure.jwcalla - Friday, August 29, 2014 - link
Might as well wait for them to fix TSX at this point.iwod - Friday, August 29, 2014 - link
How likely will this be in Mac Pro?DigitalFreak - Friday, August 29, 2014 - link
Doubtful. Apple is using Xeons in the Mac Pro.hansmuff - Friday, August 29, 2014 - link
I'll be waiting for two more generations. Maybe something worthwhile comes along to replace my 2600k at 4.4GHz. I'm glad the review shows so clearly where this new chip excels and who should save their money.Yuriman - Friday, August 29, 2014 - link
Typo:"Modules should be available from DDR3-2133 to DDR3-3200 at launch, with the higher end of the spectrum being announced by both G.Skill and Corsair. See our DDR4 article later this week for more extensive testing."
TelstarTOS - Friday, August 29, 2014 - link
Good article but the overclocking comparisons are a bit limited, i.e. 5930K and 5920K overclocking tables are not provided, nor a comparison with older SB/IB cpu @around 4,5ghz which most people still have and are deciding whether to upgrade to a X99 or a Z97 platform.A more accurate RAM performance comparison is also missing.
Ian Cutress - Monday, September 1, 2014 - link
At the time I had the 5930K/5820K, I was not in a position to be able to overclock due to early alpha firmware. Due to our newer benchmarking suite, I still need to go back to the early Sandy (non-E) CPUs to retest. Anything you see in Bench with the power listed has been retested at least in part this year, depending on my scheduling. Unfortunately I don't have the space to have this as an ongoing project, it occurs in time with reviews.name99 - Friday, August 29, 2014 - link
"For the six core models, the i7-5930K and the i7-5820K, one pair of cores is disabled; the pair which is disabled is not always constant, but will always be a left-to-right pair from the four rows as shown in the image. Unlike the Xeon range where sometimes the additional cache from disabled cores is still available, the L3 cache for these two cores will be disabled also."Are you sure that these various statements are correct? I'm not doubting you, but I would point out that at Hot Chips 2014 discussing the Xeon IVB server, Intel stated that they'd designed the floorplan to be "choppable".
They gave a diagram that showed a base of fifteen (3x5) CPUs+L3 slices, which chop lines to take off a th3 right-hand 5 CPUs, then to take off one or two of the horizontal pairs (taking the 10 CPus down to 8 and then 6).
Point is:
- the impression they gave is that these reduced CPU counts are not (at least not PRIMARILY) from full dies with disabled (or nonfunctional) cores --- they are manufactured to have smaller area with fewer cores.
- which suggests that versions with fewer cores but larger cache are some sort of anomaly (because the chop cuts out L3 slices along with cores). Perhaps THOSE are the chips that really did have one or two non-functional cores but with still functional L3 slices?
Ian Cutress - Monday, September 1, 2014 - link
As far as we know, the floorplan for the die for i7 is an 8-core, with the 6-core models being disabled versions rather than wholly new dies.With the Ivy-E Xeons, there are a number of CPUs that have high L3 per core numbers due to the way the cores are disabled - Intel usually sticks to 3 floor plans or so depending on how their product line is stacked up. This may change with Haswell-E, though the Xeons have not been officially released yet. The Ivy-E floorplans can be found here, where I did a breakdown of L3/core:
http://www.anandtech.com/show/7852/intel-xeon-e526...