domingo, 23 de julio de 2017

Intel - Core i7-7700K 4.2GHz processor throttling to 800MHz when XMP is enabled. pc building site custom pc builder

Troubleshooting Help:

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU Intel - Core i7-7700K 4.2GHz Quad-Core Processor $323.89 @ OutletPC
CPU Cooler NZXT - Kraken X52 Rev 2 73.1 CFM Liquid CPU Cooler $149.99 @ B&H
Motherboard Asus - STRIX Z270G Micro ATX LGA1151 Motherboard $189.99 @ Amazon
Memory Corsair - Vengeance LPX 32GB (4 x 8GB) DDR4-3200 Memory $299.99 @ Amazon
Storage Seagate - Barracuda 3TB 3.5" 7200RPM Internal Hard Drive $83.61 @ OutletPC
Video Card MSI - GeForce GTX 1080 Ti 11GB AERO OC Video Card -
Case Fractal Design - Define Mini C with Window MicroATX Mid Tower Case $74.99 @ SuperBiiz
Power Supply Corsair - 860W 80+ Platinum Certified Fully-Modular ATX Power Supply $198.99 @ Amazon
Operating System Microsoft - Windows 10 Pro Full 32/64-bit $199.99 @ B&H
Monitor Dell - U2515H 25.0" 2560x1440 60Hz Monitor $319.99 @ Best Buy
Prices include shipping, taxes, rebates, and discounts
Total $1841.43
Generated by PCPartPicker 2017-07-23 23:58 EDT-0400

Recently a friend helped me build a PC, and it's been working great, except for one odd hiccup: when I try to enable XMP to get my RAM to run at the advertised clock speed (3200MHz), the performance of the computer plummets. After running tests and monitoring with NZXT's CAM software, I confirmed that the GPU was running normally, the RAM was running at 3200MHz like I wanted, but the CPU throttled at 800MHz. Going into BIOS again, I was able to confirm that there too the clock speed was set to 800MHz.

In the Asus BIOS, I've tried a few tweaks to address the issue, but without success from any of these. Things I've tried include:

-Updating my BIOS to the latest version.

-Enabling XMP with and without the "all core enhancement" option that the BIOS asks about when enabling XMP.

-Leaving XMP disabled, and only changing the DRAM Frequency manually.

-Uninstalling the Asus AI Suite 3, which I was told had issues in the past.

The only thing that fixes the issue is to completely disable XMP, after which the CPU happily clocks up to 4.2GHz as it should.

Any help would be greatly appreciated! I'd love to see my machine (which I have christened Nightblood) running at its peak. :)

submitted by /u/jacobcullum
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from /r/buildapc - Planning on building a computer but need some advice? This is the place to ask! https://www.reddit.com/r/buildapc/comments/6p647r/intel_core_i77700k_42ghz_processor_throttling_to/
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