‡ This feature may not be available on all computing systems. Refer to Datasheet for formal definitions of product properties and features. Your company as an importer and/or exporter is responsible for determining the correct classification of your transaction. Any use made of Intel classifications are without recourse to Intel and shall not be construed as a representation or warranty regarding the proper ECCN or HTS. Intel classifications are for general, educational and planning purposes only and consist of Export Control Classification Numbers (ECCN) and Harmonized Tariff Schedule (HTS) numbers. Please contact system vendor for more information on specific products or systems. The information herein is provided "as-is" and Intel does not make any representations or warranties whatsoever regarding accuracy of the information, nor on the product features, availability, functionality, or compatibility of the products listed. Intel may make changes to manufacturing life cycle, specifications, and product descriptions at any time, without notice. However, after having been there and done all that, I’m merely reporting the facts as they emerged in my experiences.Īnd yes, I unplugged the CMOS battery to reset the BIOS, to no avail.All information provided is subject to change at any time, without notice. The board is compatible with the CPU’s, the CPU’s are compatible with the board. Indeed, both the Core i7 4770 and the Core i7 4770K are listed as compatible, both ways. Some give various reasons, but the bottom line is that they are incompatible, regardless of Intel’s wizards. The further research I’ve done online on various forums also says that they are not. My motherboard and my CPU, however, say that they are not. Intel says, both ways, that the two are compatible. This Intel site is where the wizards are found. I also said, “I settled on a Core i7 4770K after going through Intel’s compatibility wizards for the motherboard model and the CPU model.” I was already running 332 BIOS before I started. The first thing I do is compatibility checks of all the components that I plan to use. Other than my very first PC in the ’90’s and a Dell that I needed to buy after a house fire, I’ve built all of my PC’s. I have an Intel DH87MC motherboard that I’m not using, and a mid-tower case my son bought and decided not to use, so now I’ve got almost enough spare parts to build a “bench” machine, one I can do all my slicing, dicing and splicing to Windows 10 without worries. There is no sign of a crack in the old motherboard, but it could be in the middle layer of the PCB and not visible from the outside. I removed it and installed my Core i5, and it’s all good once again. I tried the Core i7 4770 first, but again, only got a repeating pattern of blinking lights on the front of the case, but no boot. Once all my pieces arrived, I gutted my old case, put the new motherboard in the new case together with all the drives and other bits and pieces. I also ordered a new case, since I wasn’t all that pleased with the mini-tower case I had. On the assumption that the motherboard might have developed an issue because of the inherent flexing of all my changing around of CPU’s, I ordered a replacement, another Intel DH87RL (they’re getting hard to find). I checked all the power connections, and when I unplugged the 2 X 12 main power connector and plugged it back in, I could feel movement in the board itself that I’ve not felt before in any previous builds I’ve done. I checked all the drive connections and tried again, but no go. The only light that came on was the power indicator light. Again I replaced the Core i5, but it still wouldn’t boot. I got basically the same results, a repeating pattern of blinking lights, no signal on the monitor, and no boot. So I ordered a Core i7 4770 and tried that. My experience seemed to support that conclusion to some degree. I did further research online and found a couple of posts on forums stating that since the DH87RL was not an unlocked board, the unlocked Core i7 4770K was not compatible. So I replaced the Core i7 with the original Core i5, and everything was back to normal. There were multiple courses of repeated HDD-activity-light-blinking in the same pattern, but no boot, no signal on the monitor. Compatible, but not really.Īfter making the change, it would not boot. I settled on a Core i7 4770K after going through Intel’s compatibility wizards for the motherboard model and the CPU model. Not that I really need it with my typical usage, I just wanted it. For some time I have intended to upgrade the CPU on my Intel DH87RL motherboard from a Core i5 4670 to a Core i7 with multi-threading capability.
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