The gaming CPU shortlist

The best CPU for gaming in the UK is the AMD Ryzen 7 9850X3D, which scores 100% in Tom's Hardware's August 2026 CPU hierarchy and costs £382.99 on Amazon UK at the time of writing (September 2026). The Ryzen 9 9950X3D at £527.00 adds 16 cores for creative work at 95.7%, and the Ryzen 7 7800X3D at £299.00 is the best-value 3D V-Cache chip at 85.6%.

Intel's Core Ultra 7 270K Plus at £293.97 suits gaming plus streaming, with 24 cores against 8. Memory is the bigger cost in 2026: a Patriot Viper Venom 32 GB DDR5-6000 CL30 kit costs £429.99, more than every CPU here except the Ryzen 9 9950X3D.

What is the best CPU for gaming in the UK in 2026?

The AMD Ryzen 7 9850X3D is the best CPU for gaming in 2026, and AMD's 3D V-Cache chips hold the top seven places in Tom's Hardware's 17-game hierarchy, tested at 1080p on an RTX 5090. The 96 MB of stacked L3 cache keeps game data close to the cores, which is why an 8-core X3D chip outruns Intel's 24-core parts in games. The picks by budget:

• Over £350: Ryzen 7 9850X3D (£382.99) for gaming; Ryzen 9 9950X3D (£527.00) for gaming plus rendering, encoding or streaming.
• £290 to £300: Ryzen 7 7800X3D (£299.00) for gaming; Core Ultra 7 270K Plus (£293.97) for gaming plus heavy multitasking.
• £210 to £230: Ryzen 5 7500X3D (£229.00) or Core Ultra 5 250K Plus (£214.99).
• Under £150: Core i5-14400F (£148.97) for a DDR4 build.

1. AMD Ryzen 7 9850X3D - fastest gaming CPU

The AMD Ryzen 7 9850X3D costs £382.99 on Amazon UK at the time of writing (September 2026). AMD launched it on 29 January 2026 at $500 as a higher-clocked 9800X3D: the same 8 Zen 5 cores, 16 threads and 96 MB of L3 cache, with the boost clock raised from 5.2 GHz to 5.6 GHz. Tom's Hardware's August 2026 hierarchy ranks it first at 100%.

The extra clock speed buys a small lead and costs power. The Ryzen 7 9800X3D scores 97.0% in the same hierarchy for £27.10 less on Amazon UK, at £355.89. TechSpot measured the 9850X3D 4 to 5% faster at 1080p, with average EPS power draw up 27%, from 128 W to 162 W. The Ryzen 7 9850X3D suits buyers pairing an RTX 5080 or faster card with a high-refresh monitor, where the CPU sets the frame-rate ceiling.

2. AMD Ryzen 9 9950X3D - best for gaming and creative work

The AMD Ryzen 9 9950X3D costs £527.00 on Amazon UK at the time of writing (September 2026). AMD launched it on 12 March 2025 at $700 with 16 Zen 5 cores, 32 threads, a 5.7 GHz boost, 128 MB of L3 cache and a 170 W TDP. Tom's Hardware's August 2026 hierarchy scores it 95.7%, 4.3 points behind the Ryzen 7 9850X3D and 10.1 points ahead of the Ryzen 7 7800X3D.

TechPowerUp's March 2026 test on an RTX 5090 measured the 9950X3D at 207.1 fps at 1080p, against 198.8 fps for the Ryzen 7 7800X3D and 185.6 fps for the Core Ultra 7 270K Plus. Its real advantage is cores: 16 cores and 32 threads against 8 and 16 on the Ryzen 7 X3D chips, which counts for 3D rendering, video encoding and game streaming alongside play. Against the 270K Plus, the other many-core pick, it costs £233.03 more and scores 18.2 points higher in games.

The Ryzen 9 9950X3D suits buyers who game and create on one PC and want near-flagship frame rates too. For gaming alone, the Ryzen 7 9850X3D is faster and £144.01 cheaper.

3. AMD Ryzen 7 7800X3D - best value X3D

The AMD Ryzen 7 7800X3D costs £299.00 on Amazon UK at the time of writing (September 2026), against a $450 launch price in April 2023. It pairs 8 Zen 4 cores and 16 threads with a 5.0 GHz boost and the same 96 MB of L3 cache as the Zen 5 X3D chips, and scores 85.6% in Tom's Hardware's hierarchy.

The 7800X3D costs £3.49 per gaming point, the lowest of the X3D chips in the value table below, and TechSpot's best CPUs guide measured it 13% faster than the Core Ultra 7 270K Plus in CPU-limited games. AMD tests its X3D chips with 32 GB of DDR5-6000, the de facto sweet spot on AM5. The Ryzen 7 7800X3D suits 1440p gamers with an RTX 5070 or Radeon RX 9070 XT, where a faster CPU adds little at native resolution.

4. Intel Core Ultra 7 270K Plus - best Intel CPU for gaming

The Intel Core Ultra 7 270K Plus costs £293.97 on Amazon UK at the time of writing (September 2026). Intel launched it on 26 March 2026 at $299 with 24 cores (8 performance, 16 efficient), a 5.5 GHz boost, 40 MB of L2 and 36 MB of L3 cache, and official support for DDR5-7200. Tom's Hardware scores it 77.5%, and TechSpot names it the best mainstream CPU.

TechSpot measured the 270K Plus 3% faster than the Ryzen 7 9700X in games, with 11% better 1% lows. The 270K Plus earns its place on cores: 24 against 8 for any Ryzen 7 X3D chip, which counts for game streaming, video encoding and compiling. The Core Ultra 7 270K Plus suits buyers who game and create on one PC, play at 1440p or above and would rather not pay £527.00 for the Ryzen 9 9950X3D.

Which gaming CPU gives the most performance per pound?

The Intel Core i5-14400F gives the most gaming performance per pound, at £2.57 per percentage point of its Tom's Hardware score, and the Core Ultra 5 250K Plus is the best-value current-generation chip at £2.93. Compare Electronic divided each chip's Amazon UK price by its score in Tom's Hardware's August 2026 hierarchy, a 17-game average at 1080p on an RTX 5090 with the Ryzen 7 9850X3D as 100%.

• Tom's Hardware scores the i5-14400, the same chip as the Core i5-14400F with integrated graphics, at 58.0%.
• The 14.4 points from the Ryzen 7 7800X3D to the Ryzen 7 9850X3D cost £5.83 each (£83.99 ÷ 14.4).
• The Ryzen 9 9950X3D costs £144.01 more than the 9850X3D and scores 4.3 points lower: the premium buys 8 extra cores, not frames.
• The Core Ultra 5 250K Plus costs £66.02 more than the Core i5-14400F for 15.3 points, £4.32 per point. The Core i5-14600K costs £18.00 more than the 250K Plus and scores 0.5 points lower.

CPU-only value flatters cheap chips, because every AM5 and LGA1851 chip also needs a board and DDR5. The Ryzen 5 7500X3D is judged on TechSpot's figures in the budget section below.

What does a gaming CPU cost with a motherboard and RAM?

A gaming platform of CPU, motherboard and 32 GB of DDR5 costs £917.99 with the Ryzen 7 7800X3D, £923.95 with the Core Ultra 7 270K Plus, £1,042.97 with the Ryzen 7 9850X3D and £1,186.98 with the Ryzen 9 9950X3D at Amazon UK prices in September 2026. The Patriot Viper Venom 32 GB DDR5-6000 CL30 kit at £429.99 is the most expensive part in every build except the 9950X3D's.

• The RAM kit costs £47.00 more than the Ryzen 7 9850X3D itself and makes up 46.8% of the 7800X3D build.
• Counted as a platform, the 9850X3D build is the best value of the four at £10.43 per point, because £659.98 of board and RAM dilutes the CPU premium. On the ASUS TUF Gaming B850-Plus WiFi it totals £1,001.98, or £10.02 per point.
• The Intel build costs £5.96 more than the 7800X3D build and scores 8.1 points lower in games. It wins only on core count.

OC3D tracked a Crucial Pro 32 GB DDR5-6000 kit on Amazon UK at £79 in September 2025 and £351 by January 2026; the causes are in the RAM shortage explained. Board picks are in the best motherboard for gaming UK 2026 guide.

Ryzen 7 9850X3D or Ryzen 9 9950X3D: which is better for gaming?

The Ryzen 7 9850X3D is the better gaming chip; the Ryzen 9 9950X3D is the better all-round chip. The 9950X3D costs £144.01 more, a 37.6% premium, and the difference buys:

• 8 more cores and 16 more threads: 16 and 32 against 8 and 16.
• 32 MB more L3 cache (128 MB against 96 MB) and 100 MHz more boost clock (5.7 GHz against 5.6 GHz).
• A 170 W TDP against 120 W, per AMD.
• 4.3 fewer points in Tom's Hardware's gaming hierarchy: 95.7% against 100%.

As a platform on the MSI MAG B850 Tomahawk Max WiFi with 32 GB of DDR5, the gap shrinks to 13.8%: £1,186.98 against £1,042.97. The 9850X3D suits a gaming-only PC; the 9950X3D suits a PC that also renders, encodes or streams.

7800X3D or 9850X3D: which is better for gaming?

The Ryzen 7 9850X3D is the faster chip; the Ryzen 7 7800X3D is the better buy for 1440p. TechSpot measured the 9850X3D 14% faster, and Tom's Hardware scores them 100% and 85.6%. The 9850X3D costs £83.99 more: 28.1% more for the chip, but only 9.1% more as a full platform (£1,001.98 against £917.99 on the same ASUS TUF Gaming B850-Plus WiFi and Patriot RAM).

The 7800X3D suits 1440p builds with an RTX 5070-class card; the 9850X3D suits high-refresh 1080p play and later GPU upgrades. A full system comparison is in Ryzen 7 7800X3D vs Ryzen 7 5700X gaming PC.

Is Intel competitive for gaming again?

Yes in the mid-range, no at the top. The Core Ultra 200S Plus chips put Intel back in contention on price: the Core Ultra 5 250K Plusscores 73.3% for £214.99 and the Core Ultra 7 270K Plus 77.5% for £293.97, both ahead of the Core i5-14600K at 72.8% and AMD's Ryzen 5 9600X at 72.6%.

• TechSpot measured the 250K Plus 2 to 3% faster than the Ryzen 5 9600X and 12% faster than the Core Ultra 5 245K.
• No Intel chip reaches the X3D tier: the Ryzen 7 9850X3D is 29% faster than the 270K Plus in Tom's Hardware's ranking, and TechSpot measured the Ryzen 7 7800X3D 13% faster in CPU-limited games.
• The Core i5-14600Kscores 72.8% at £232.99, £18.00 more than the faster 250K Plus, and carries Raptor Lake's Vmin shift history: Intel's fixes run to microcode 0x12F (May 2025), and Intel extended its warranty by two years.

For 270K Plus vs 7800X3D: the 7800X3D for a gaming-only PC, the 270K Plus for gaming plus streaming or encoding at £5.03 less. Buyers who want both top-tier frame rates and many cores should look at the Ryzen 9 9950X3D.

What is the best budget gaming CPU?

The AMD Ryzen 5 7500X3D is the best budget gaming CPU, at £229.00 on Amazon UK at the time of writing (September 2026). It is the cheapest 3D V-Cache chip, with 6 Zen 4 cores, 12 threads, a 4.5 GHz boost and 96 MB of L3 cache, and TechSpot measured it 10% faster than the Ryzen 5 9600X and 11% slower than the Ryzen 7 7800X3D.

• Core Ultra 5 250K Plus (£214.99): 73.3% in Tom's Hardware's hierarchy at £2.93 per point, with 18 cores for multitasking. TechSpot measured it 2 to 3% faster than the Ryzen 5 9600X, against 10% for the 7500X3D, and LGA1851 is reported to end with this generation.
• Core i5-14400F (£148.97): the DDR4 route and the lowest cost per point in this guide, £2.57. 32 GB of DDR4-3200 costs £220.00 less than DDR5-6000, but Tom's Hardware (28 July 2026) measured DDR4 costing LGA1700 chips 11 to 14% of gaming performance on average.

What a budget platform costs on Amazon UK (September 2026):

• Ryzen 5 7500X3D + Gigabyte B850 Aorus Elite WiFi7 (£172.99) + Patriot 32 GB DDR5-6000 (£429.99): £831.98
• Ryzen 5 7500X3D + MSI PRO B650M-A WiFi (£151.45) + Corsair Vengeance 16 GB DDR5-5200 (£245.99): £626.44
• Core Ultra 5 250K Plus + ASUS TUF Gaming Z890-Plus WiFi (£199.99) + Patriot 32 GB DDR5-6000: £844.97
• Core i5-14400F + MSI PRO B760M-P DDR4 (£89.99) + Corsair Vengeance LPX 32 GB DDR4-3200 (£209.99): £448.95

The 32 GB Ryzen 5 7500X3D route costs £383.03 more than the Intel DDR4 route, and it keeps the AM5 upgrade path AMD supports through 2029. TechSpot's January 2026 memory test found 16 GB matched 32 GB in 12 of 13 games, so the £626.44 build is a sound stopgap.

Does the CPU matter at 1440p and 4K?

Less than at 1080p, but it never stops mattering. TechPowerUp, testing with an RTX 5090 in its Core Ultra 7 270K Plus review, measured the lead of the fastest X3D chip in that test, the Ryzen 7 9800X3D, over the six-core Ryzen 5 9600X shrinking as resolution rises.

TechSpot's May 2026 analysis shows where the gap comes back:

• Upscaling: 1440p with DLSS Quality renders internally at 960p, so CPU differences return.
• Lower settings: in Marvel Rivals at native 1440p, the 9800X3D led the Ryzen 7 5800X3D by 6% at Ultra and 27% at Medium.
• CPU-heavy games:Space Marine 2, Baldur's Gate 3 and Assetto Corsa Competizione show 1440p results close to 1080p.

For a 4K gamer on a mid-range card, spare budget does more on the graphics card; the best graphics card UK 2026 guide ranks them by price per 1440p frame.

Which CPU suits an RTX 5070 or RX 9070 XT?

The Ryzen 7 7800X3D is the best match for an RTX 5070 or Radeon RX 9070 XT, and a Ryzen 5 7500X3D or Core Ultra 5 250K Plus is enough for native 1440p at high settings. No 2026 test pairs a range of CPUs with an RTX 5070, so this is Compare Electronic's inference from the RTX 5090 data: a slower card narrows native-resolution gaps, so the 14% spread at 1440p above is a ceiling. TechSpot's Spider-Man 2 ray tracing test is the counterpoint: any card rendering more than 70 fps there, RTX 5070 Ti included, leaves the game "completely CPU limited".

The ASUS Prime Radeon RX 9070 XT OC costs £668.99, so with a Ryzen 7 7800X3D the pair costs £967.99; the Ryzen 7 9850X3D adds £83.99 for gains a mid-range card mostly hides. The Gigabyte GeForce RTX 5070 Eagle OC SFF costs £718.99; the two cards go head to head in RTX 5070 vs RX 9070 XT.

AM5 or LGA1851: which platform lasts longer?

AM5 lasts longer. AMD extended AM5 support "through 2029" at Computex 2026. Intel's LGA1851 is reported to end with the Core Ultra 200S Plus: leaks reported by Tom's Hardware on 3 September 2026 put Nova Lake (Core Ultra 400) on a new LGA1954 socket, with the first unlocked chips in Q1 2027. Intel has not confirmed a date.

• Zen 6: not formally announced. Data-mined AMD documents list Olympic Ridge desktop chips under AM5 (TechSpot, 27 August 2026); a desktop delay to 2027 is rumoured.
• Ryzen 5 9600X3D:not launched. AMD said at Computex 2026 that a six-core Zen 5 X3D chip "may be something that we look at doing".
• LGA1700: no upgrade path beyond 14th-gen chips, but it still takes DDR4.

AM5 is worth it in 2026 for any new build. The MSI MAG B850 Tomahawk Max WiFi (£229.99) and ASUS TUF Gaming B850-Plus WiFi (£189.00) have BIOS Flashback, which updates the BIOS with no CPU or RAM fitted, ready for a future chip.

What about AM4 owners?

AM4 owners should upgrade the graphics card first and move to AM5 only if the CPU still limits frame rates afterwards. A platform swap is expensive: the Ryzen 7 7800X3D, MSI PRO B650M-A WiFi (£151.45) and Patriot 32 GB DDR5-6000 kit total £880.44 at Amazon UK prices in September 2026.

• TechSpot measured the Ryzen 7 7800X3D 20 to 24% faster than the Ryzen 7 5800X3D, AMD's top AM4 gaming chip, and the Ryzen 5 7500X3D 8 to 9% faster.
• The same £880.44 covers an ASUS Prime Radeon RX 9070 XT OC at £668.99 with £211.45 to spare.
• AMD re-released the Ryzen 7 5800X3D as the 10th Anniversary Edition on 25 June 2026 at $349; TechSpot found performance identical to the 2022 original and level with the Ryzen 5 9600X on a 13-game average.
• The Ryzen 7 5700X3D is end of life, according to Tom's Hardware (August 2025).

Owners weighing a CPU swap on AM4 should check the board maker's CPU support list for a compatible BIOS first. The GPU or CPU decision is covered step by step in how to upgrade an old gaming PC.

Who should skip these CPUs?

Four chips are poor gaming buys at September 2026 prices:

• Ryzen 9 9950X3D2 Dual Edition ($900 at launch): TechSpot judged it not compelling for gaming at roughly three times the price of the Core Ultra 7 270K Plus.
• Ryzen 7 9700X (£267.45): TechPowerUp measured 188.0 fps at 1080p against 198.8 fps for the 7800X3D, which costs £31.55 more.
• Core Ultra 7 265K (£340.23 on Amazon UK): £46.26 more than the 270K Plus, which TechSpot measured 13% faster.
• Core i5-14600K (£232.99): £18.00 more than the faster Core Ultra 5 250K Plus; worth it only to reuse an LGA1700 board.

Buyers who would rather not build at all should read build vs buy a gaming PC UK 2026.

What should UK buyers check before ordering a CPU?

• Cooler: AMD ships the Ryzen 7 9850X3D, Ryzen 9 9950X3D and Ryzen 7 7800X3D without a cooler, and the 9950X3D is rated at 170 W TDP.
• BIOS:AMD says a BIOS update may be required for Ryzen 9000 chips on 600-series boards; check the board's CPU support list for the 9850X3D, 9950X3D and 7500X3D. The ASUS TUF and MSI Tomahawk B850 boards and the MSI PRO B650M-A WiFi can flash a BIOS with no CPU fitted, and the Gigabyte B850 Aorus Elite WiFi7 has Q-Flash Plus.
• Intel 14th gen: update to microcode 0x12F or later and run Intel Default Settings.
• Rights: the Consumer Rights Act 2015 gives a 30-day right to reject a faulty CPU for a full refund from the retailer.

Verdict

The AMD Ryzen 7 9850X3D at £382.99 is the fastest gaming CPU in the UK and, counted as a full platform, the best value of the four builds priced here at £10.43 per point. The Ryzen 9 9950X3D at £527.00 is the pick for gaming plus rendering, encoding or streaming. The Ryzen 7 7800X3D at £299.00 is the value X3D pick for 1440p, the Core Ultra 7 270K Plus at £293.97 is the cheaper choice for gaming plus multitasking, and the Ryzen 5 7500X3D at £229.00 is the budget pick. Whichever chip goes in, budget for 32 GB of DDR5 at £429.99 first.