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Kernel-memory-leaking Intel processor design flaw forces Linux, Windows redesign | Pe

Submitted by: SINep @ 08:23 PM | Wednesday, January 3, 2018 | (url: https://www.there...)

A fundamental design flaw in Intel's processor chips has forced a significant redesign of the Linux and Windows kernels to defang the chip-level security bug.

Programmers are scrambling to overhaul the open-source Linux kernel's virtual memory system. Meanwhile, Microsoft is expected to publicly introduce the necessary changes to its Windows operating system in an upcoming Patch Tuesday: these changes were seeded to beta testers running fast-ring Windows Insider builds in November and December.

Crucially, these updates to both Linux and Windows will incur a performance hit on Intel products. The effects are still being benchmarked, however we're looking at a ballpark figure of five to 30 per cent slow down, depending on the task and the processor model. More recent Intel chips have features such as PCID to reduce the performance hit. Your mileage may vary.

Best case: 17% slowdown
Worst case: 23% slowdown
The Register (@TheRegister) January 2, 2018

Similar operating systems, such as Apple's 64-bit macOS, will also need to be updated the flaw is in the Intel x86-64 hardware, and it appears a microcode update can't address it. It has to be fixed in software at the OS level, or go buy a new processor without the design blunder.

Details of the vulnerability within Intel's silicon are under wraps: an embargo on the specifics is due to lift early this month, perhaps in time for Microsoft's Patch Tuesday next week. Indeed, patches for the Linux kernel are available for all to see but comments in the source code have been redacted to obfuscate the issue.

However, some details of the flaw have surfaced, and so this is what we know.


More:
https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/


Best CPU Cooler Performance - Q4 2008

Submitted by: Das Capitolin @ 01:37 PM | Tuesday, January 6, 2009 | (url: http://benchmarkr...)

From my experience, 2008 has been a very good year for CPU coolers. We've tested the OCZ Vendetta 2 to perform as well or better than coolers twice its price, and we've discovered that the Thermaltake V14 Pro can deliver top cooling performance while looking good. But heading into 2009 we must bid farewell to the LGA775 platform, which has been the home to many of our most popular products, and welcome in the new LGA1366 socket for the Intel Core i7 CPU & X58 platform. This Best CPU Cooler Performance - Q4 2008 article will be the last foreseeable socket T series round-up from Benchmark Reviews, unless something really big changes the landscape.


Best CPU Cooler Performance - Q2 2008

Submitted by: Das Capitolin @ 05:37 PM | Friday, July 18, 2008 | (url: http://benchmarkr...)

Benchmark Reviews strives to offer the overclocker and hardware enthusiast community solid evidence reflecting the true performance of computer products through rigorous testing and evaluation. The purpose of this second article of our series is to document performance and declare the best CPU coolers available as of Q2 2008.


Vendetta 2 vs TRUE vs HDT-S1283

Submitted by: Das Capitolin @ 11:02 AM | Tuesday, June 10, 2008 | (url: http://benchmarkr...)

This article serves only one purpose: test three of the industry's most coveted coolers. Not very long ago Benchmark Reviews published the article Best CPU Cooler Performance - Q1 2008. At the time, the effort we gave in producing our test results seemed well worth the trouble. However, months later we see that there's a lot more to a cooler than just measuring performance with the same common fan. So after even more testing, we now have a full understanding of each CPU coolers individual characteristics and deliver the results to you. Benchmark Reviews is proud to present a three-way fight to the finish: The OCZ Vendetta 2 vs. Thermalright's Ultra-120 eXtreme vs. Xigmatek's HDT-S1283.

http://benchmarkreviews.com/index.php?option=com_content&task=view&id=156&Itemid=1