Cooling with the Chiller crowbar
In order to achieve comparable results for the launch article of the Core i7-7900X, we use the Alphacool Ice Age Chiller 2000, as with all articles on AMD's Ryzen, which also enables a load-independent, congested water temperature of 20°C. Thus, the determined values are comparable to all these reviews, which of course also allows interesting conclusions about the extent to which Intel's new CPUs suffer from the USED TIM (heat conductive paste) or to what extent. negatively affected by it.
High Delta Values
This is again due to Intel's inappropriate (but arguably much cheaper) thermal paste, rather than a sensible solder. In order to be able to correctly classify the worse circumstances due to the thermal paste used, we now show the temperature differences between the constant 20°C cool water block and what we have determined as CPU temperature from the sensor values.
The following curve shows extremely clearly that the waste heat can only be dissipated poorly and insufficiently. We also measured the temperature of the heatspreader using our own, very thin copper plates analogous to the Ryzen and Core 9 launch articles, whereby the delta determined here is later included in our individual curve. Let's first compare the Core i5-7640X with the Core i7 7740X in terms of temperature differences:
At the end, the following curve thus represents the temperature differences between the heatspreader top and the computational cores of the two CPUs, which also have very similar curves.
Although with our Chiller, the Alphacool XPX water block and the Thermal Grizzly Kryonaut thermal paste we have used pretty much the best and most expensive that the market has to offer, at the end 38 and even 48 Kelvin as a temperature difference between the temperature of the cores and the top of the heat spreader on the calculation. This is not highly dramatic, but it is quite annoying because it is unnecessary.
Leakage
We measured the power consumption values at identical loads and different cooling solutions. The amount of leakage currents that can be measured, or rather what could have been thought of, was below the measurement tolerance and we therefore also dispense with a digram. Both CPUs therefore do not suffer from temperature-dependent leakage currents, which could lead to a significant increase in power consumption.
Intermediate conclusion
Yes, it could have been a little nicer with Kaby Lake-X, wasn't there, as with Kaby Lake, the annoyance with the thermal paste between Heatspreader and Die. Well, the normal user will be able to live with it, but it drives up the costs for the user, who in any case has to buy a decent cooler.
- 1 - Einführung und Übersicht
- 2 - X299-Chipsatz und Testsystem
- 3 - Anomalien und Probleme, Battlefield 1
- 4 - AotS Escalation, Civization VI, GTA V
- 5 - Shadow of Mordor, Project Cars, Rise of the Tomb Raider
- 6 - Workstation- und HPC-Performance
- 7 - Leistungsaufnahme und Übertaktung
- 8 - Temperaturverläufe und Delta-Werte
- 9 - Zusammenfasung und Fazit
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