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设备管理器里面看是正常的，真是搞不懂了
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应该是bios设置问题吧，清一下BIOS再看
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楼主是买了我的2600k，急着要退货，说是这个u 2个核心是坏的。我虽然不玩台式机，但就这么多年的从业经验，觉得是不太可能的事情。国内的百度搜索不到相关的帖子。但英文版的google可以搜到很多类似解决的经验贴，大体原因是win7配置错误，可以通过msconfig充新配置或者干脆重装系统。现在贴一个，给后来碰到这样问题的人参考。
Re: i7-2600K only showing 2 cores/4 threads
Booga1289 wrote:
;
I got it. It was my fault I tried to fast track and just move my HDDs over to the new board without doing fresh re install of Windows 7. I just did a quick dirty install on a spare HDD and all 8 threads were visible (4 cores / 8 threads). So I'll set up for a fresh install.
;
What I did try prior to OS:
1) MSconfig for processors for boot up, only 4 showed.
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2) Regedit to "unpark" cores found in Resource Monitor.
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3) Adjusted Advanced power settings for processor from active to passive.
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4) Complete review of Bios, Cores set to All, Flashed to latest version
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5) Complete driver review by Intel and updates.
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Let me clarify for others. None of the steps outlined 1 - 5 helped fix my problem. The issue was a conflict within the OS that was corrected with a clean install.
# 1 reflects how I found the issue. When I would go into Task Manager> Performance>Resource Manager, I would see only 4 CPUs (Which is actually 2
Cores / 4 threads) therefore I was seeing the 4 threads. On a Quad core I7 with Hyperthreading I should have see eight. I then loaded CPU-Z and verified, it also showed 2 cores/4 threads (see above post). When I looked closer in Process Monitor it showed "parked" next to some of the cores.
#2 Reflects a post when found under "parked core" that explained how to go into your registry and "unpark" your cores. I followed this in hopes that it would free up the other cores not visible. No Luck there.
#3 Was the result of another search on Cores that maybe it was related to a power saving option. The setting Control Panel>Power Options> Change plane Setting>Change Advanced Settings>Processor Power Management - No help
#4 Bios - Just info. Processer Info stated 4 cores, Cores set to All, and Bios where of the latest revision.
#5 Just in case it was driver driven to unlock all of the cores, I ran the driver review utility on the intel site. Didn't address the issue.
Last option was to take a spare drive and do a quick OS install (No updates), disconnected my other hard drives first, and then ran Resource manager Booyah! all threads and cores visible. Removed drive, reinstalled old HDD and did a fresh install.
Root Cause was me. Complete reinstall of windows cured issue.
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*/-48两个核心是坏的。这个说法。。怕是没的
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LZ你用的ghost版的系统？
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按開始功能表，打msconfig，選"開機"->"進階選項"，處理器數目那有沒有tick 了？有就untick or 選做8。
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楼主的内存一样的奇葩啊，7G……这要如何蛋疼的插法才能凑出来啊*/-93
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bios恢复默认，系统重装，再看看
核心坏的难度太高了
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两个核心是坏的。。
真是个奇葩的想法*/-94
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重新拆装下U估计就好了~
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重装系统，解决问题了，⊙﹏⊙b汗，是我着急了。
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*/-91 解决了问题就好
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核心是坏的要退货- -好喜感的说 不过解决了就好
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2221-421-4111
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一个4 一个2 一个1
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果然，7G的内存是一朵奇葩
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楼主以前是没有遇到过这样的问题，我06年就遇到过。
重装系统，这个不能省！
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我当时也不知道内存怎么显示那样，现在一切正常了，是8G的内存。
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1.BIOS原因 恢复默认一下
2.WINDOWS原因，在MSCONFIG里设置一下
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当时遇到这个问题，去msconfig里面调那个CPU个数了，调成4，重启直接进不去系统，蓝屏。
然后去BIOS里面，超线程关掉、CPU个数调整成1、2、3，均进不去系统。
最后重装系统以后就正常了。
以前2300换2500K也没用重装系统，没想到2500K换2600K就折腾了
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LZ你的AIDA版本有点过时啊
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很有可能是针脚接触问题。
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这个侧到针脚就有点扯远了！应该还是bios的问题！我也碰到过的！后来从装了系统再清空了bios就好了！*/-91
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