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Intel Core i7-10700K vs AMD Ryzen 7 3700X: Eight-Core CPUs Fight for Prime Day Supremacy

You know things are tough in the CPU world when the best Intel and AMD chips deals for Amazon's Prime Day are for previous-gen chips, but that's the situation this year. We spotted dueling deals for previous-gen eight-core Intel and AMD chips, all of which have vied for spots on our Best CPUs list in the past. That sets up a Prime Day battle between the $259 Core i7-10700K ($239 for the graphics-less 10700KF) and the $279 Ryzen 7 3700X. 

We typically don't recommend buying previous-gen chips, but all three of these chips are available at (or near) all-time low pricing while we're in the unforgiving grip of a silicon shortage. That makes them solid alternatives if you're looking to upgrade a current system, or even build out a new platform with previous-gen gear. 

For comparison, both the current-gen eight-core AMD Ryzen 7 5800X and the eight-core Intel Core i7-11700K weigh in at $399 when you can find them in stock near MSRP, meaning that the three chips in today's Amazon Prime Day deal are ~$150 cheaper for the same number of cores. That means you'll pay roughly $34 per core for the previous-gen chips while the more modern chips weigh in at $50 per core. 

Naturally, the previous-gen eight-core chips aren't as fast as the newer models, but you can reference our CPU Benchmark hierarchy for a crystal-clear view of the performance deltas between the newer and older chips. Here's a snippet of how that breaks down for each chip, with the scores in each category being relative to the fastest chip on the market in each category (higher is better):

PriceGaming 1080p / 1440pMulti-Threaded PerformanceSingle-Threaded Performance
Intel Core i7-10700K/F$259 / $23986% / 90%28%82%
Ryzen 7 3700X$27977% / 81%27%76%
Core i7-11700K/F$399 / $38992% / 95%34%94%
Ryzen 7 5800X$39997% / 97%33%93%

Intel Core i7-10700K: was $320, now $260 at Amazon
The Core i7-10700K's $260 price tag marks a new low for the eight-core 16-thread processor that operates with a 5.1 GHz boost and 3.8 GHz base clock. This chip makes a cost-effective upgrade if you already have a 10th-gen processor, but be sure to check pricing on newer alternatives before pulling the trigger. View Deal

Intel Core i7-10700KF: was $301, now $240 at Amazon
The Core i7-10700KF's $240 price tag marks a new low for the eight-core 16-thread processor that operates with a 5.1 GHz boost and 3.8 GHz base clock. This model comes without integrated graphics and makes a cost-effective upgrade if you already have a 10th-gen processor, but be sure to check pricing on newer alternatives before pulling the trigger.View Deal

AMD Ryzen 7 3700X: was $307, now $279 at Amazon
AMD's eight-core 16-thread Ryzen 7 3700X is at near all-time low pricing for Prime Day, marking the only AMD chip we can find with a substantial discount. This chip ticks at 3.8 GHz under heavy load and boosts to 4.6 GHz. It also comes with full support for PCIe 4.0. View Deal

Overall, the Core i7-10700K looks to be the better pick based purely on performance alone. However, remember, this chip doesn't come with a bundled cooler, whereas the Ryzen 7 3700X does. Additionally, the Ryzen 7 3700X supports PCIe 4.0 while the 10700K uses the slower PCIe 3.0 spec.

For more Prime Day savings, check out our Prime Day live blog and lists of the best Prime Day gaming PC and laptop deals, best Prime Day SSD deals, best Prime Day Monitor Deals, Best Prime Day Dell Gaming deals and the best Prime Day hardware deals overall. Our sister site, TechRadar, has a broader list of Amazon Prime Day deals that includes product categories we don't typically cover, such as smart home devices, TVs and phones.

Paul Alcorn is the Deputy Managing Editor for Tom's Hardware US. He writes news and reviews on CPUs, storage and enterprise hardware.


Intel Core i7-10700 vs Core i7-10700K Review: Is 65W Comet Lake an Option?

Over the years, Intel’s consumer processor lineup has featured its usual array of overclocking ‘K’ models, and more recently the ‘F’ series that come without integrated graphics. The bulk of the lineup however are still the versions without a suffix, the ‘nones’, like the Core i7-10700 in this review. These processors sit in the middle of the road, almost always having a 65 W TDP compared to the 91-125 W overclockable models, but also having integrated graphics, unlike the F family. What makes it interesting is when we pair one of these 65 W parts against its 125 W overclocking counterpart, and if the extra base and turbo frequency boost is actually worth the money in an era where motherboards don't seem to care about power?

Intel’s Core i7-10700 at 65 W: Is It Really 65 W?

The understanding of the way that Intel references its TDP (thermal design point) values has gone through a mini-revolution in the last few years. We have had an almost-decade of quad-core processors at around 90 W and 65 W, and most of them would never reached these numbers even under turbo modes - for example, the Core i5-6600K was rated at 91 W, but peak power draw was only 83 W. This has been the norm for a while, until recently when Intel had to start boosting the core count. As we have slowly gone up in core count, from 4 to 6 to 8 and now 10, these numbers have seemed almost arbitrary for a while.

The reason comes down to what TDP really is. In the past, we used to assume that it was the peak power consumption of the processor was its TDP rating – after all, a ‘thermal design point’ of a processor was almost worthless if you didn’t account for the peak power dissipation. What makes Intel’s situation different (or confusing, depending on how you want to call it) is that the company defines its TDP in the context of a 'base' frequency. The TDP will be the maximum power under a sustained workload for which the base frequency is the minimum frequency guarantee. Intel defines a sustained workload one in which the 'turbo budget' has expired, and the processor will achieve its best frequency above base frequency (but not turbo modes) .

The point about ‘not turbo’ is the key element here. Intel’s TDP ratings are only in effect for the base frequency, not the turbo frequency. If a PC is built with a maximum power dissipation in mind, allowing a processor to turbo above that power might have catastrophic consequences for the thermal performance of that system. The other angle is that Intel never quotes the turbo power levels (also known as Power Level 2, or PL2) alongside the other specifications, although they are technically in the specification documents when they get released.

On top of all this, motherboard manufacturers also get a say in how a processor performs. Because turbo power is only an optional suggestion from Intel, technically Intel will accept any value for the ceiling of the turbo power, and accept turbo under any circumstances if the motherboard manufacturer wants it. Motherboard manufacturers overengineer their motherboards to support longer turbo times (or overclocking), and so they will often ignore these Intel recommended values for PL2, allowing the processor to turbo harder for longer, and in a lot of cases of premium motherboards, indefinitely.

So why does all this matter with respect for this review? Well my key comparison in this review is our new processor, the Core i7-10700, up against its overclocking counterpart, the Core i7-10700K. Aside from the suffix difference, the K variant has a TDP almost twice as high, and this manifests almost entirely in the base frequency difference.

Intel SKU vs SKU
(an homage to Spy vs Spy)
Intel Core
AnandTechIntel Core
8 C / 16 TCores / Threads8 C / 16 T
3.8 GHzBase Frequency2.9 GHz
5.1 GHzPeak Turbo (1-2C)4.8 GHz
4.7 GHzAll-Core Turbo4.6 GHz
2 x DDR4-2933
Up to 128 GB
DRAM Support2 x DDR4-2933
Up to 128 GB
125 WTDP / PL165 W
Intel UHD 630Integrated GraphicsIntel UHD 630
$374Price (1ku)$323

Even though the TDP is 125 W vs 65 W, the peak turbo frequency difference is only +300 MHz, and the all-core turbo difference is only +100 MHz. In contrast, the base frequency difference is +900 MHz, and that is ultimately what the user is paying for. But this base frequency only matters if the motherboard bothers to put a cap on turbo budgets.

The base frequency is more of a minimum guaranteed frequency, than an absolute 'this is what you will get' value under a sustained workload. Intel likes to state that the base frequency is the guarantee, however if a processor can achieve a higher frequency while power limited, it will - if it can achieve that power value with 200 MHz above base frequency, it will run at the higher frequency. If this sounds familiar, this is how all AMD Ryzen processors work, however Intel only implements it when turbo is no longer available. This ends up being very processor dependent. 

For the turbo, as mentioned, Intel has recommendations for power levels and turbo time in its documentation, however OEMs and motherboard manufacturers are free to routinely ignore it. This is no more obvious than when comparing these two processors. What does this mean for end-users? Well, graphs like this.

Intel Peak Power Draw

First time I saw these numbers, it shocked me. Why is this cheaper, and supposedly less powerful version of this silicon running at a higher turbo power in a standard off-the-shelf Intel Z490 motherboard?

Welcome to our review. There’s going to be a lot of discussion on the page where we talk about power, frequency, and the quality of the silicon. Also when it comes to benchmarking, because if we were to take an extreme view of everything, then benchmarking is pointless and I'm out of a job.

The Market

The Core i7-10700 and Core i7-10700K are both members of Intel’s 10th Generation ‘Comet Lake’ Core i7 family. This means they are based on Intel’s latest 14nm process variant (14+++, we think, Intel stopped telling us outright), but are essentially power and frequency optimized versions of Intel’s 6th Generation Skylake Core, except we get eight cores rather than four.

Intel 10th Gen Comet Lake
Core i9 and Core i7
Core i9
Core i7
T = Low Power
F = No Integrated Graphics
K = Overclockable

TB2/TB3 = Intel Turbo Boost 2 (any core in CPU), TB3 (specific core in CPU)
TVB = Thermal Velocity Boost (Spec = 70ºC); routinely ignored by motherboard vendors

Both CPUs are rated to run dual channel memory at DDR4-2933 speeds, and have 16 PCIe 3.0 lanes with support for Intel 400-series chipsets. These are socket LGA1200 processors, and are incompatible with other LGA115x motherboards.

Aside from the power and frequency differences, the other one is the price: $335 MSRP for the Core i7-10700, and $387 MSRP for the Core i7-10700K. This is a +$52 difference, which is designed to enable better frequencies and overclocking on the K processor. The non-K processor may be shipped with Intel’s 65 W PCG-2015C thermal solution, depending on location, although the first thing you would want to do is to buy something/anything else to cool the processor with given that it'll peak at 215W in enthusiast systems.

On the competing side from AMD, the nearest solution is the Ryzen 5 5600X, a 65W version of Zen 3 with two fewer cores but higher IPC, with an MSRP of $300. This does come with a reasonably good default cooler. Our full review of the Ryzen 5 5600X can be found here.

This Review

The goal of this review was initially just to benchmark the Core i7-10700 and see where it fits into the market. As our testing results came into focus, it was clear that we had an interesting comparison on our hands against the Core i7-10700K, which we have also tested. In this review the focus will be on the difference between the two, focusing primarily on where the i7-10700 lands compared to the competition, and perhaps some of the complexities involved.

Test Setup

As per our processor testing policy, we take a premium category motherboard suitable for the socket, and equip the system with a suitable amount of memory running at the manufacturer's maximum supported frequency. This is also typically run at JEDEC subtimings where possible. It is noted that some users are not keen on this policy, stating that sometimes the maximum supported frequency is quite low, or faster memory is available at a similar price, or that the JEDEC speeds can be prohibitive for performance. While these comments make sense, ultimately very few users apply memory profiles (either XMP or other) as they require interaction with the BIOS, and most users will fall back on JEDEC supported speeds - this includes home users as well as industry who might want to shave off a cent or two from the cost or stay within the margins set by the manufacturer.

Test Setup
Intel LGA1200Core i9-10900K
Core i9-10850K
Core i7-10700K
Core i7-10700
ASRock Z490
PG Velocita
+ SST*
Corsair DomRGB
4x8 GB
AMD AM4Ryzen 9 5900X
Ryzen 7 5800X
Ryzen 5 5600X
X570 Godlike
2x32 GB
GPUSapphire RX 460 2GB (CPU Tests)
NVIDIA RTX 2080 Ti FE (Gaming Tests)
PSUCorsair AX860i
Corsair AX1200i
Silverstone SST-ST1000-P
SSDCrucial MX500 2TB
*TRUE Copper used with Silverstone SST-FHP141-VF 173 CFM fans. Nice and loud.

Many thanks to...

We must thank the following companies for kindly providing hardware for our multiple test beds. Some of this hardware is not in this test bed specifically, but is used in other testing.

A big thanks to ADATA for the ​AD4U3200716G22-SGN modules for this review. They're currently the backbone of our AMD testing.

Users interested in the details of our current CPU benchmark suite can refer to our #CPUOverload article which covers the topics of benchmark automation as well as what our suite runs and why. We also benchmark much more data than is shown in a typical review, all of which you can see in our benchmark database. We call it ‘Bench’, and there’s also a link on the top of the website in case you need it for processor comparison in the future.

If anyone is wondering why I've written the SKU of the processor on it with a sharpie, as per our lead image, it's because when you're shuffling through a box of them in low light, what is printed on the headspreader can be difficult to read if the light isn't right. With a perminent marker, it makes it much easier to read at-a-glance.

Read on for our full review.

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Pros: First off, I'm upgrading from a I7-4790K (4.7GHz OCed). The 4790K I have is 5 years old. That CPU is a true beast, but I felt like it was time to get a new MB/CPU/RAM due to age. So, that said, I see a huge difference in desktop work and games. I mainly game. I don't understand why everyone says these CPU's run hot. I'm running stable at 5.2 on an AIO and this CPU doesn't even break 40c-70c in some benchmarks or games. It runs way cooler than my 88w 4790K. I am using an Aorus Ultra MB. If you are coming from a way older generation Intel or AMD, this CPU will not disappoint!

Cons: Cons. I didn't want to wait for however long for the KF series, so I paid the extra for the K. That has nothing to due with how this CPU performs. So, not really a con. (I tried to find one)

Overall Review: Overall, this is a fantastic CPU. I've owned both AMD and Intel through out my 42 years. If you are coming from a much older Intel gen CPU, I recommend it fully. If you have 9th gen I7-I9, I wouldn't recommend.


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10700k i7 intel core

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Hard to Justify: Intel Core i7-10700K CPU Review \u0026 Benchmarks vs. 3900X, 3700X, 10600K

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