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Depends entirely on what you're going to be using the computer for, the 9700K will be better in gaming while the 3800X is better for Workstation tasks.

Main Desktop: CPU - i9-14900k | Mobo - Gigabyte Z790 Aorus Elite AX | GPU - PNY Gaming OC RTX 5080 16GB RAM - Corsair Vengeance Pro RGB 64GB 6400mhz | AIO - Arctic Liquid Freezer III 360mm | PSU - Corsair RM1000X | Case - Hyte Y40 - White | Storage - Samsung 980 Pro 1TB Nvme /  Sabrent Rocket 4 Plus 4TB Nvme / Samsung 970 EVO Plus 2TB Nvme / Samsung 870 EVO 4TB SSD / Samsung 870 QVO 2TB SSD/ Samsung 860 EVO 500GB SSD|

 

TV Streaming PC: Intel Nuc CPU - i7 13th Gen | RAM - 16GB DDR4 3200mhz | Storage - Crucial P3 Plus 1TB Nvme |

 

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getting a 9700K means the best CPU you can upgrade to without a new motherboard is a 9900k

 

with Ryzen, you get the option to upgrade to 4th gen next year

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

Primary PC:

i7 8086k - EVGA Z370 Classified K - G.Skill Trident Z RGB - WD SN750 - Jedi Order Titan Xp - Hyper 212 Black (with RGB Riing flair) - EVGA G3 650W - dual booting Windows 11 and Fedora Linux - Black and green theme, Razer brainwashed me.

Draws 400 watts under max load, for reference.

 

PSU tier list

How many watts do I need?

PSU misconceptions, protections explainedgroup reg is bad

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The problem with Ryzen is that the 3800X games the same as the 3600 so you're not gaining nothing spending more if your primary use is games.

 

The i7 9700K however will game significantly better but it is all in all considered bad value due to the lack of threads facing the 3700X and 3800X which decreases it's multitasking and other uses outside game.

 

There's no right answer here, I'd argue it depends on far more information you haven't given us like user case, other components, display settings and so on.

Personal Desktop":

CPU: Intel Core i7 10700K @5ghz |~| Cooling: bq! Dark Rock Pro 4 |~| MOBO: Gigabyte Z490UD ATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: RX 6900XT Sapphire Nitro+ |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: AMD R9 7950XT  |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Aorus Master |~| RAM: 32G Kingston HyperX |~| GPU: AMD Radeon RX 7900XTX (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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3700x/3800x are like 9900KF that clock much worse, 3800x not as bad, for a big discount. 9700k wins in single core performance but isnt as good in multicore, so it really depends on workload and whether Intel Quicksync helps you

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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6 hours ago, Mabbott7 said:

I'm thinking about building a pc and im stuck choosing between 2 CPU's the AMD Ryzen 7 3800x or the intel i7 9700k i have researched both but i cant pick one, any input would be greatly appreciated, thanks

For gaming, Intel is always better.  For anything else, AMD is bang for buck. 

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6 hours ago, Mabbott7 said:

I'm thinking about building a pc and im stuck choosing between 2 CPU's the AMD Ryzen 7 3800x or the intel i7 9700k i have researched both but i cant pick one, any input would be greatly appreciated, thanks

If you're purely gaming, and doing no other productivity work that is CPU intensive, intel. If you are doing productivity, AMD is the way to go.

Also, the 3700x is in my opinion a better buy as you can overclock it and get the same performance as the 3800x. 

Current PC (Second Build) : CPU: Ryzen 5 1600 (OC @3.8GHz, sometimes pushed to 4GHz) RAM: 16gb Corsair Vengeance RGB Pro DDR4-2666 (OC @2733Mhz, sometimes pushed to 2800 for testing purposes)   GPU: PowerColor Radeon RX570 8gb MOBO: ASRock B450m Pro4 SSD: Inland 120gb HDD: 1tb Seagate Barracuda PSU: Cooler Master Masterwatt 500w Lite Case: NZXT H500 OS: Arch Linux+ KDE Plasma [Desktop Environment] & Windows 10 Pro [Broken due to grub 50% of the time]

 

Accessories: Mouse: Alienware AW958 Elite Keyboard: Corsair K63 Wireless  Headphones: Samsung Level On Pro

 

Phone (waiting on arrival): Samsung Galaxy Note 9

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