With the z420 liquid cooler in place, the CPU idles at 33-35C. In XTU, I settled on 42X- the multiplier setting + 171.875mV additional voltage. The power and speed control of the liquid cooler plugged into the same connection as the air cooler and the BIOS thermal settings emianed standard.
The liquid cooler worked as the z420 and z620 have fundamentally the same motherboard and use the same BIOS. In the example of the E5-1660 v2, as the base frequency on all cores was already 3.9 Ghz, the 300MHz overclock did not impose a significant increase in the heat and stress, but the E5-1680 v2 running at 3.4GHz meant that increasing the all-core clock by 900Mhz is significant, so I added a z420 liquid cooler to the z620. Those are, in fact, the only controls available to E5 Xeons. the selection of the proper additional voltage to add in proportion to the overlock. In both examples, the OC was intended to improve the single-thread performance for large models in 3D CAD.Īs XTU will not allow the turbo duration and power maximum to be unlocked so as to protect the CPU, the key considerations are: 1. I've used Intel Extreme Tuning Utility to overclock a Xeon E5-1660 v2 in a z420 to all cores 4.2GHz and an E5-1680 v2 to 4.3GHz on all 8 cores in a z620. Business PCs, Workstations and Point of Sale Systems.Printer Wireless, Networking & Internet.DesignJet, Large Format Printers & Digital Press.Printing Errors or Lights & Stuck Print Jobs.Notebook Hardware and Upgrade Questions.
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