Why do CPUs have three levels of cache, L1, L2, and L3, and not just only one level o...?

L1 cache design is extremely difficult as it has to run at the full CPU clock. The wire sizes must be as short as possible otherwise the CPU frequency would have to be lowered. So adding more L1…

Top stories for Long   Why do CPUs have three levels of cache, L1, L2, and L3, and not just only one level of cache? Why can't we go any higher than L3? Marcelo Pacheco, Since 1984. 8/16/32/64 bit. Linux mostly these days. • Answered January 7 L1 cache design is extremely difficult as it has to run at the full CPU clock. The wire sizes must be as short as possible otherwise the CPU frequency would have to be lowe... Read more » 188 9   Your response is private Was this worth your time? This helps us show content you find valuable. Absolutely not Definitely yes   How did the "9/11 Surfer" survive his fall of 15 floors? Is there any scientific explanation? OakTeller, lives in New York, NY • Answered January 10 The surfer name is a joke thing for a nightmare. He is one of the luckiest men in history. There was no falling nicely in air - If he had, gravity would have smashed him fla... Read more » 7.5K 240   If the police come to my door and ask to see my ID, do I have to show it? Derek Smith, Father of 6, grandfather of 14 and counting. • Updated December 14 Whenever police show up at your door, follow these rules: Rule 1: immediately start recording. Rule 2: don't answer the door. In fact, make sure it is locked. Rule 3: never ta... Read more » 3.3K 132   Why don't predators eat hibernating bears? Sean Kernan, Writer at seanjkernan.substack.com • Answered October 29 If nature were a video game, hibernation would be considered an overpowered feature that needs to be nerfed. The bear goes to sleep and its body begins shutting down, its br... Read more » 10.5K 270   Does marijuana use have to be chronic or all the time to have long lasting effects on addiction? Julie Nutter, works at Gardening • Answered October 20 OMG…I have to disagree with everything you said! First of all I'm 75…started smoking pot when I was 18…and I'm talking every waking hour of every single day! I smoked while... Read more » 1.1K 157   Can you put 1 million dollars in the S&P 500 and live off the interest? Jim Caron, 30+ years as a stock/mutual fund/options/currency investor • Updated January 20 Can you put 1 million dollars in the S&P 500 and live off the interest? The simplest answer is No. That's because 1) you can't invest in the S&P 500 — it's not a financial i... Read more » 2.3K 149   Why isn't .h used in C++? Philippe Dunski, Author of the book "Coder efficacement" (in French) • Answered January 11 Hello, Why isn't .h used in C++? It is… Or, at least, it can be (and many C++ library use it). However, point is that .h is the traditional file extension for C headers and, e... Read more » 91 12   Is it healthy to run every day? Tony Bikelson, studied at University of California, Berkeley • Answered January 19 Previously, I used to run every day for the last 3-4 years consecutively. By consecutively, I mean a minimum of 5-6 miles a day with no rest days, regardless of what my bod... Read more » 323 11   Why is Lucy Liu considered ugly in Asia? She has a high nose bridge and small face. Ewe Yu Yie, Board Member for some non profit organisations (2019-present) • Answered April 23, 2024 This is Lucy Liu at her prime. This is a local Chinese actress at her prime Danielle Sya Carmen Soo... Read more » 404 256   Did the Columbia astronauts have any idea that something was seriously wrong during their mission, and how did they respond in those final moments? Alan Springett, former Physical Scientist/Risk Assessment/writer (1975-2023) • Answered January 5 What most people are unaware of, a crew member of the Columbia was filming onboard during the reentry. That video was only shared with the families and forensic staff. That... Read more » 1.3K 72   It's almost 2026. Would you choose a Mac or a Windows machine? Franklin Veaux, Technology enthusiast, mad engineer, and tech startup founder. • Answered November 5 As we come to the end of 2025, I think buying a new Windows machine is something of a perverse act of idiocy. The Windows 11 Terms of Use for Windows 11 25H2 specifically gr... Read more » 1.9K 234   Why do SNAP recipients not like Costco? I know cashiers there who say they seldom see EBT cards being used for eligible purchases. Geraldine Merola, Proud Mother and Home Maker (2005-present) • Updated August 3, 2021 Costco is not popular with SNAP recipients because items at Costco are packaged in bulk. For instance, a chuck roast is cheaper per pound at Costco than anywhere else. But t... Read more » 3K 474 Read more in your feed

Never miss a story. Designed for readers on the go.

Missing out on Quora emails? Be sure to add us to your primary inbox. This email was sent by Quora (605 Castro Street, Mountain View, CA 94041). If you don't want to receive this type of email in the future, please unsubscribe. https://www.quora.com