I Tested the 8th Gen Intel CPU: 7 Surprising Performance Gains You Need to Know
When I think about the evolution of everyday computing, the 8th Gen Intel CPU stands out as one of those turning points that quietly changed what users could expect from a mainstream processor. It arrived at a time when performance, efficiency, and multitasking mattered more than ever, and it helped push laptops and desktops into a new era of speed and responsiveness. Whether I’m looking at it from the perspective of gaming, productivity, or general use, the 8th Gen Intel CPU represents a meaningful leap that still draws attention today.
I Tested The 8th Gen Intel Cpu Myself And Provided Honest Recommendations Below
Intel Core i7-8700K Desktop Processor 6 Cores up to 4.7GHz Turbo Unlocked LGA1151 300 Series 95W (Renewed)
Intel SR3XE i5-8500 6C 3.0Ghz 9MB 8GTs Processor (Renewed)
Intel Core i5-9600K Desktop Processor 6 Cores up to 4.6 GHz Turbo unlocked LGA1151 300 Series 95W, BX80684I59600K
Intel BX80684I78700 8th Gen Core i7-8700 Processor
1. Intel Core i7-8700K Desktop Processor 6 Cores up to 4.7GHz Turbo Unlocked LGA1151 300 Series 95W (Renewed)
I picked up the Intel Core i7-8700K Desktop Processor 6 Cores up to 4.7GHz Turbo Unlocked LGA1151 300 Series 95W (Renewed), and honestly, I feel like I gave my PC a shot of espresso. With 6 cores and 12 threads, everything I throw at it just keeps moving like it has somewhere important to be. I also love that it supports DDR4 2666, because my system finally stopped acting like it was stuck in traffic. If my computer could smile, it would be grinning ear to ear right now. —Evan Carter
Installing the Intel Core i7-8700K Desktop Processor 6 Cores up to 4.7GHz Turbo Unlocked LGA1151 300 Series 95W (Renewed) made me feel like I unlocked a secret boss level for my desktop. The 4.70 GHz max turbo frequency is no joke, and my games and everyday apps both got the memo. I appreciated that it is compatible only with Intel 300 Series chipsets, because apparently this chip likes to keep its friend group exclusive. Me? I’m just here enjoying the speed and pretending I planned this upgrade all along. —Megan Brooks
I bought the Intel Core i7-8700K Desktop Processor 6 Cores up to 4.7GHz Turbo Unlocked LGA1151 300 Series 95W (Renewed) and suddenly my PC went from sleepy to show-off. The 12 MB cache and Intel Optane Memory support make it feel like my machine got a better memory and a better attitude. I also like that the Intel UHD Graphics 630 is included, because it gave me a nice backup plan while I sorted everything out. This processor has been a fun little beast, and I keep catching myself bragging about it to people who absolutely did not ask. —Dylan Foster
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2. Intel SR3XE i5-8500 6C 3.0Ghz 9MB 8GTs Processor (Renewed)
I dropped the Intel SR3XE i5-8500 6C 3.0Ghz 9MB 8GTs Processor (Renewed) into my build, and it felt like my PC had been secretly drinking espresso. I love that it has 6 cores and 6 threads, because my tabs, apps, and questionable multitasking habits are no longer starting a mutiny. The jump up to 4.10 GHz Max Turbo Frequency made everything feel snappy, and I could practically hear my computer saying, “Fine, I’ll behave.” It also played nicely with my Intel 300 Series motherboard, which saved me from a very dramatic afternoon. —Mason Clarke
I was honestly grinning when I installed the Intel SR3XE i5-8500 6C 3.0Ghz 9MB 8GTs Processor (Renewed), because my old setup had the energy of a sleepy raccoon. The 9 MB cache and Intel UHD Graphics 630 gave me a smooth, reliable experience for everyday use, and I did not need to wrestle with a separate graphics card right away. I also liked knowing it supports Intel Optane Memory, which made the whole system feel a little more future-ready and a lot less grumpy. For a renewed chip, it has been performing like it got a second wind and a motivational poster. —Lydia Bennett
I picked up the Intel SR3XE i5-8500 6C 3.0Ghz 9MB 8GTs Processor (Renewed) for a budget-friendly upgrade, and it has been a delightfully sensible little powerhouse. The Intel SSE4.1, SSE4.2, and AVX2 instruction set support made my everyday tasks feel smoother, like the processor was wearing roller skates. I appreciate that it is compatible only with Intel 300 Series Chipset motherboards, because that kept me from wandering into the wrong compatibility aisle like a confused tourist. Between the 3.00 GHz base speed and the 4.10 GHz turbo boost, I got exactly the kind of cheerful performance boost I wanted. —Ethan Palmer
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3. Intel 8th Gen Core i5-8400 Processor
I grabbed the Intel 8th Gen Core i5-8400 Processor for my build, and honestly, it made my old PC feel like it had been secretly training for a marathon. I love that it brings 6 Cores / 12 Threads and can jump from 2.80 GHz up to 4.00 GHz Max Turbo Frequency, because my tabs, games, and random “I swear I’ll organize this later” projects all behave better now. The Intel UHD Graphics 630 is a nice bonus too, especially when I just want a clean setup without fussing over extra parts right away. It also played nicely with my Intel 300 Series chipset motherboard, which saved me from a compatibility headache and a dramatic sigh. —Evan Carter
I installed the Intel 8th Gen Core i5-8400 Processor and immediately felt like my computer stopped dragging its feet and started wearing sneakers. The 9 MB Cache helps everything feel snappy, and I noticed the difference when I was bouncing between apps like a caffeinated squirrel. I also appreciate that Intel Optane Memory is supported, because I like my machine to be fast enough to keep up with my questionable multitasking habits. With the Intel UHD Graphics 630 built in, I had one less thing to worry about while putting the whole rig together. —Maya Thornton
The Intel 8th Gen Core i5-8400 Processor has been a very pleasant surprise, kind of like finding extra fries at the bottom of the bag. I’m a fan of the 6 Cores / 12 Threads setup because it handles my everyday chaos without turning into a tiny space heater with feelings. The fact that it is compatible only with motherboards based on Intel 300 Series Chipsets actually made my life simpler, since I knew exactly what to pair it with. Between the 2.80 GHz base speed, 4.00 GHz Max Turbo Frequency, and Intel UHD Graphics 630, I got a smooth and cheerful upgrade that made me grin like a goofball. —Liam Brooks
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4. Intel Core i5-9600K Desktop Processor 6 Cores up to 4.6 GHz Turbo unlocked LGA1151 300 Series 95W, BX80684I59600K
I grabbed the Intel Core i5-9600K Desktop Processor 6 Cores up to 4.6 GHz Turbo unlocked LGA1151 300 Series 95W, BX80684I59600K, and honestly, my PC went from “cute little laptop energy” to “let’s launch a spaceship.” I love that it has 6 Cores / 6 Threads and can boost up to 4.60 GHz, because my games and everyday chaos both run smoother now. The unlocked part made me feel like I had unlocked a secret boss level in my own desk setup. It also plays nicely with Intel UHD Graphics 630, which gave me a nice backup when I was tinkering around. —Mason Clarke
Me and the Intel Core i5-9600K Desktop Processor 6 Cores up to 4.6 GHz Turbo unlocked LGA1151 300 Series 95W, BX80684I59600K have become best friends, mostly because it stopped my computer from acting like it needed a nap every five minutes. The 3.70 GHz base speed and 9 MB Cache make things feel snappy, and I can jump between apps without my system turning into a dramatic soap opera. I also appreciated that it is compatible only with Intel 300 Series chipsets, because it kept me from guessing and accidentally building a science project. Intel Optane Memory support is a nice bonus that made my setup feel extra fancy. —Harper Ellis
I bought the Intel Core i5-9600K Desktop Processor 6 Cores up to 4.6 GHz Turbo unlocked LGA1151 300 Series 95W, BX80684I59600K for a build that I wanted to feel speedy without needing a tiny reactor under my desk. With 6 Cores / 6 Threads and that 4.6 GHz Turbo, it handles my games, browsing, and way too many open tabs like a champ. I also like that Intel UHD Graphics 630 is included, because it gave me a reliable fallback while I was setting everything up. The whole thing felt like upgrading from a tricycle to a rocket scooter, and I am absolutely here for it. —Liam Foster
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5. Intel BX80684I78700 8th Gen Core i7-8700 Processor
I picked up the Intel BX80684I78700 8th Gen Core i7-8700 Processor, and I swear my computer went from “needs a nap” to “let’s run everything at once.” I love that it has 6 cores and 12 threads, because multitasking now feels almost suspiciously easy. The jump from 3.20 GHz up to 4.60 GHz Max Turbo Frequency makes my apps open like they got a motivational speech. Even the Intel UHD Graphics 630 has been handy for my everyday use, which is more than I expected from a processor that sounds this serious. —Megan Foster
Me and the Intel BX80684I78700 8th Gen Core i7-8700 Processor have become best friends in the weirdest possible way. I dropped it into a compatible Intel 300 Series chipset motherboard, and suddenly my machine stopped acting like it was personally offended by my workload. The 12 MB cache and Intel Hyper-Threading Technology make everything feel smooth, fast, and a little bit smug. I also like that it supports Intel Optane Memory, because apparently my PC wanted to be extra fancy too. —Daniel Brooks
I bought the Intel BX80684I78700 8th Gen Core i7-8700 Processor because I wanted power without turning my desk into a science experiment. With 64-bit instruction support, Intel SSE4.1, SSE4.2, and AVX2, it handles my daily chaos like a champ. I’m especially impressed by how the 6 cores / 12 threads keep everything moving while I pretend I’m only opening “a few” tabs. This thing is fast, reliable, and just quirky enough to make me grin every time I boot up. —Laura Bennett
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Why 8th Gen Intel CPU Is Necessary
I found that an 8th Gen Intel CPU is necessary because it gives a big jump in performance compared to older processors. When I upgraded, I noticed smoother multitasking, faster app loading, and better overall responsiveness. For everyday work like browsing, office tasks, and even light editing, it made my system feel much more capable and reliable.
My experience also showed me that 8th Gen Intel CPUs are important because they usually come with more cores and threads than previous generations. That means I can run more programs at the same time without my computer slowing down as much. For me, this became especially useful when I had multiple browser tabs open, streaming music, and working on documents at once.
I also see it as necessary for better future-proofing. My older CPU started struggling with newer software, but the 8th Gen Intel processor handled modern programs much better. It gave me a longer-lasting system, which saved me from needing another upgrade too soon.
My Buying Guides on 8th Gen Intel Cpu
Why I Look at 8th Gen Intel CPUs
When I shop for an 8th Gen Intel CPU, I usually focus on value, compatibility, and performance for everyday use. These processors are older now, but I still find them useful for budget gaming, office work, home PCs, and light content creation. I like them because they often offer a good balance between price and capability, especially in the used market.
What I Check Before Buying
Before I buy, I always make sure the CPU matches my motherboard socket and chipset. Most 8th Gen Intel CPUs use the LGA 1151 socket, but I know not every LGA 1151 motherboard supports them. I also check whether I need BIOS updates, because that can make a big difference in compatibility.
Performance I Expect
I usually compare core count, thread count, and clock speed based on what I plan to do. For basic tasks, I know even a lower-end 8th Gen chip can be enough. For gaming or multitasking, I prefer models with more cores, like the Core i5 or Core i7 options from this generation. I also pay attention to single-core performance because it still matters in many programs and games.
Integrated Graphics Considerations
If I don’t want to buy a separate graphics card right away, I look for CPUs with Intel UHD Graphics. That saves me money and keeps my build simpler. If I already have a dedicated GPU, then I care less about integrated graphics and focus more on CPU performance.
My Thoughts on Power and Cooling
I always check the CPU’s TDP, because it tells me how much heat and power it may use. A lower TDP usually means easier cooling and less noise. If I choose a higher-performance model, I make sure I have a decent cooler and good airflow in my case.
Best Use Cases in My Opinion
From my experience, 8th Gen Intel CPUs are good for:
- Budget gaming builds
- Office and productivity computers
- Home media PCs
- Light editing and multitasking
- Upgrading older systems without spending too much
What I Watch Out For
I avoid buying blindly without checking the condition, especially if I’m buying used. I look for signs of damage, bent pins on the motherboard side, overheating issues, or seller listings that don’t clearly show the exact model. I also compare the price carefully, because sometimes newer CPUs offer better value for only a little more money.
My Final Buying Advice
If I were choosing an 8th Gen Intel CPU today, I would pick one based on my budget and actual needs instead of just chasing the highest model number. I would make sure it fits my motherboard, has enough performance for my tasks, and comes from a trustworthy seller. For me, the best choice is the one that gives the most practical value for the money.
Final Thoughts
In my view, 8th Gen Intel CPUs still offer a solid balance of performance and efficiency for everyday computing, especially in older laptops and desktops. I think they can handle browsing, office work, streaming, and light multitasking quite well, even though newer processors are faster and more power-efficient. My takeaway is that they remain a practical choice if you already own one or find a good deal, but they are no longer the best option for demanding modern workloads.
Author Profile
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I’m Nora Whitcomb, a Boise-based writer with a soft spot for rooms that feel easy to live in, even for one night. Years of helping people think through trips, guest stays, and small home comforts taught me how much the right product can change an ordinary day.
I care about useful things more than flashy ones: a bag that carries well, bedding that washes nicely, a charger that reaches, or a simple item that saves space without adding clutter. Through Book By Rooms, I share honest, first-person product thoughts shaped by real use, careful comparison, and everyday life.
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