Intel Core i7-7700K Desktop Processor 4 Cores up to 4.5 GHz unlocked LGA 1151 100/200 Series 91W (Renewed)
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AI Verdict
This 4-core, 8-thread LGA 1151 CPU with 4.5 GHz max turbo is for breathing a little more life into an aging 100/200 series motherboard.
This renewed i7-7700K is a situational fit, primarily serving as a drop-in upgrade for users with an existing LGA 1151 motherboard (100/200 series chipset) and a weaker CPU. Its 4 cores and 8 threads, combined with a 4.5 GHz max turbo frequency, offer a performance boost for single-threaded tasks and older games, but it struggles with modern multi-threaded workloads and high-end GPUs.
If you need more multi-threaded performance or better longevity for gaming, look for CPUs with 6 or more cores and higher clock speeds on a newer platform.
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Pros
- Achieves 4.5 GHz max turbo frequency out of the box, offering a speed bump for older systems.
- Features an unlocked multiplier, allowing for overclocking beyond 4.5 GHz, with some users reaching 5 GHz on liquid cooling.
- Includes Intel UHD Graphics 630, capable of hardware decoding 4K H.265 video and streaming 4K Netflix content.
- Compatible with existing Intel 100-series and 200-series chipset motherboards.
- Supports Intel Optane Memory for potential storage acceleration.
Cons
- Its 4 cores and 8 threads are considered a minimum for modern gaming, potentially bottlenecking newer GPUs.
- Performance gains over the previous generation i7-6700K were only 5-7% at stock speeds upon release.
- Requires an LGA 1151 motherboard with a 100 or 200 series chipset, limiting upgrade paths without a full platform change.
- Some users reported high temperatures, especially when overclocking, requiring robust cooling solutions.
Dimension Scores
Its 4.5 GHz max turbo frequency and Kaby Lake architecture provide above-average single-thread performance for its generation, but it's surpassed by newer CPUs.
With only 4 cores and 8 threads, its multi-thread performance is below current category averages, especially for demanding applications and modern games.
The 91W TDP is average for a performance-oriented CPU of its era, but newer generations offer better performance per watt.
The LGA 1151 socket with 100/200 series chipset support is an older platform, offering limited upgrade options and diminishing relevance for new hardware.
Best For
- Upgrading an existing PC with an LGA 1151 100/200 series motherboard and a weaker CPU.
- 1080p gaming with a mid-range GPU like an RX 6600 or RTX 3060, where the CPU won't be a severe bottleneck.
- General desktop use, web browsing, and productivity tasks on an older platform.
- Streaming 4K video content thanks to integrated hardware decoding.
Not Recommended For
- Building a new PC for current-generation gaming or demanding multi-threaded applications.
- Pairing with high-end GPUs (e.g., RTX 4070 or higher) for 1440p or 4K gaming, as it will likely cause CPU throttling.
- Users seeking a future-proof CPU for the next 2-3 years, as its 4-core architecture is aging.
Watch Out For
- The 4-core, 8-thread configuration is increasingly a bottleneck for CPU-intensive modern games, even at 1080p.
- Compatibility is strictly limited to Intel 100/200 series chipsets, meaning it won't work with newer LGA 1151 boards (e.g., 300 series) or other sockets.
- Some users reported higher operating temperatures, especially when pushing clock speeds, which might necessitate delidding or a high-performance cooler.
- As a renewed product, it ships with a minimum 90-day warranty, which is shorter than a new CPU's warranty.
Full Specifications
| ASIN | B07KMDKM6P |
| Brand | Intel |
| CPU Model | Core i7 |
| CPU Speed | 4.2 GHz |
| CPU Socket | LGA 1151 |
| Item Weight | 2.08 ounces |
| Manufacturer | Intel |
| CPU Manufacturer | Intel |
| Item model number | BX80677I77700K-cr |
| Product Dimensions | 1.9 x 4.1 x 4.6 inches |
| Is Discontinued By Manufacturer | No |
What Buyers Say
Many users upgrading from much older CPUs on the same LGA 1151 platform found a noticeable performance bump, especially for gaming and general use. However, the recurring theme is that its 4-core, 8-thread design is showing its age, with several users reporting it as a bottleneck for modern GPUs in current games. Some owners noted that while it overclocks well, managing temperatures can be a challenge, requiring robust cooling.
“I threw this renewed 7700K in my old Z270 board and it definitely sped things up from my i5, but man, my RTX 3070 still feels held back in some games, especially Rust, like the CPU just can't keep up.”
Common Praise
- Runs fast out of the box with a 4.5 GHz turbo frequency.
- Overclocks well, with some users achieving stable 5 GHz speeds.
- Offers a significant upgrade for users coming from much older 2nd or 3rd generation Intel CPUs.
- Handles 4K video decoding and streaming smoothly.
- Still capable for many games when paired with appropriate mid-range GPUs.
Common Complaints
- Becomes a CPU bottleneck for modern, higher-end graphics cards in current games.
- Temperatures can run high, especially when overclocked, necessitating a high-performance cooler.
- Limited to older 100/200 series motherboards, preventing upgrades to newer chipsets without a full system overhaul.
- Performance gains over the previous i7-6700K were not substantial enough for some users to justify an upgrade at its original release.
Ownership Tips
- You'll need a dedicated CPU cooler; the box doesn't include one.
- Expect to update your motherboard's BIOS if you're upgrading from a 100-series chipset to ensure compatibility.
- If you plan to overclock, invest in a liquid cooler or a high-end air cooler to manage the heat.
- The integrated graphics (UHD 630) are fine for basic display output and 4K video, but not for serious gaming.
Frequently Asked Questions
Is this CPU compatible with my Z370 motherboard?
No, the i7-7700K is only compatible with Intel 100-series and 200-series chipsets (like Z170 or Z270) on the LGA 1151 socket. Z370 motherboards use a different generation of LGA 1151 and are not compatible.
Can I play modern games with this processor?
Yes, you can play modern games, but its 4-core, 8-thread configuration is becoming a minimum for gaming. You might experience CPU bottlenecks with higher-end GPUs or in CPU-intensive titles, especially at 1080p.
Does this CPU come with a cooler?
No, the i7-7700K is a 'K' series processor, meaning it's unlocked for overclocking and does not typically include a stock cooler. You'll need to purchase an aftermarket cooler separately, especially if you plan to overclock.
What kind of performance can I expect compared to an i5-7600K?
The i7-7700K generally outperforms the i5-7600K by about 35% on average in CPU tests, particularly in video encoding tasks due to its 8 threads.
Is this renewed CPU reliable?
Amazon Renewed products are tested and certified to look and work like new, including functionality testing and basic cleaning. It also comes with a minimum 90-day warranty.
Buying Guide
When looking at a CPU like this, you need to think about your existing setup. This isn't a CPU for a brand-new build. It's for extending the life of a PC with an older LGA 1151 motherboard. If you're still running a 6th-gen i5 or even an i7-6700K, this 7700K offers a modest clock speed bump and better 4K media handling, but don't expect a revolutionary change in multi-threaded tasks or gaming performance with a high-end GPU. It's about getting the most out of an older platform.
4 Cores / 8 Threads
Think of cores as individual workers and threads as tasks each worker can handle simultaneously. 4 cores and 8 threads means it can handle 8 tasks at once. For basic computing, that's plenty, but modern games and heavy applications often benefit from more workers (cores) to spread out the workload, like a bigger team completing a project faster.
4.5 GHz Max Turbo Frequency
This is how fast the CPU can run when it needs to work hard, like a car's top speed. A higher GHz generally means faster processing for single tasks. The 4.5 GHz here is still quick for many applications, but newer CPUs hit even higher speeds or sustain them across more cores.
LGA 1151 Socket (100/200 Series Chipset)
This is the physical connection type for the CPU to your motherboard, like a specific plug for an appliance. This CPU only fits motherboards designed for Intel's 6th and 7th generation CPUs. If your motherboard isn't a 100 or 200 series (e.g., Z170, H270, Z270), this CPU won't fit, and you'd need a new motherboard and likely new RAM too.
Alternatives
If this CPU doesn't fit your needs, look for processors with 6 or more physical cores and higher base/boost clock speeds on a newer socket type like LGA 1200 or AM4 for better multi-threaded performance and a more modern platform.
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