Intel's budget CPU range has faced significant competition from AMD over the past year, and the landscape has shifted considerably. While Intel once dominated the sub-£150 market segment, finding genuine Intel processors at this price point has become increasingly challenging in 2025. The Intel Core i5 12th and 13th generation chips that previously filled this category have either been discontinued or pushed above the £150 threshold as newer architectures arrive. This creates a unique situation where buyers seeking true budget computing solutions must carefully evaluate what remains available. The processor market has evolved rapidly, with manufacturers focusing on higher core counts and newer socket standards, leaving the sub-£150 segment thinner than previous years. Buyers in this price bracket should understand that they're often choosing between older Intel architecture or considering alternative platforms that offer better value for the money.
This guide examines the current state of budget processors available under £150, helping you understand what options exist and how they compare. Whether you're building an entry-level gaming PC, a productivity workstation, or a general-purpose machine, understanding the trade-offs at this price point is crucial. The reality of the 2025 market is that truly competitive sub-£150 Intel CPUs have largely been replaced by newer generations, yet some options remain for those willing to choose older architecture or look toward alternative manufacturers. We've investigated the best available choices at this budget tier to help you make an informed decision.
Quick Verdict
Best Overall: AMD Ryzen 5 8400F, exceptional single-threaded performance and multi-core capability just under budget, ideal for gamers and content creators seeking genuine value.
Best Value: AMD Ryzen 5 3600, proven six-core performance that remains highly capable for gaming and general tasks, with extensive software support and upgrade compatibility.
Processor Specifications Comparison
The AMD Ryzen 5 8400F stands out as the most modern processor available at this price point, offering Zen 5 architecture in a genuinely sub-£150 package. This processor is specifically engineered for users who plan to use discrete graphics cards, as it removes integrated graphics to reduce cost and improve value. The 8400F delivers exceptional single-threaded performance that makes it competitive with processors costing significantly more, whilst maintaining the efficiency credentials AMD has become known for with its 65W TDP rating. For gamers building new systems in 2025, this represents the sweet spot between current generation features and budget constraints.
The processor ships with six cores and twelve threads, utilising the latest Zen 5 microarchitecture that brings meaningful improvements in instructions per cycle and overall responsiveness. The AM5 socket ensures you're investing in a platform with several years of upgrade potential remaining, unlike older AM4 solutions that have reached their architectural limit. Performance metrics show the 8400F comfortably handles modern games at high settings when paired with a mid-range discrete GPU, and it proves more than capable for streaming, content creation, and multi-tasking workloads. The 22MB cache might appear modest compared to higher-end chips, but the Zen 5 efficiency means real-world performance translates well regardless.
For builders seeking longevity and current generation performance without stretching toward the £200 mark, the 8400F makes a compelling argument. The lack of integrated graphics keeps costs down, and the modern architecture ensures you're not buying yesterday's technology. This is the processor to choose if you're starting a new AM5 build and want the most powerful option under £150, with several more generation cycles possible before socket obsolescence becomes a concern.
Pros
- Latest Zen 5 architecture with strong single-threaded performance
- AM5 socket allows future CPU upgrades beyond this generation
- Efficient 65W TDP keeps cooling costs and power consumption low
- Best gaming performance available at this sub-£150 price tier
Cons
- No integrated graphics requires discrete GPU purchase
- Limited stock availability may require patience to find at target price
The AMD Ryzen 5 3600 represents genuine bargain-basement computing, and it remains one of the most compelling value propositions in the entire processor market. This Zen 2 architecture chip proved transformative when it launched several years ago, fundamentally shifting performance expectations at the budget tier. Whilst newer architectures have arrived since its release, the 3600 remains entirely viable for gaming, streaming, video editing, and general productivity. For anyone on a tight budget or building a secondary system, this processor delivers shocking capability at a price point that makes upgrading from older hardware feel like tremendous progress.
The six-core, twelve-thread design still punches well above its weight in multi-threaded workloads, though single-threaded performance does show its age compared to newer generations. The real magic of the 3600 lies in its value proposition: you're getting a fully capable processor that will comfortably handle gaming at high settings paired with a mid-range GPU, handle streaming simultaneously, and generally provide a smooth experience for everyday computing. The 35MB cache provides ample buffer for most scenarios, and the 65W TDP means you can cool it with budget solutions or even passively. The AM4 socket has full support from motherboard manufacturers, and finding compatible boards costs nothing extra.
This is the processor to choose if budget is your absolute primary concern and you're willing to accept that you're not buying the very latest architecture. It's perfect for first-time PC builders, anyone upgrading from a decade-old system, or builders creating budget gaming PCs that prioritise GPU investment over CPU spending. The 3600 punches well above its weight class and remains legitimately capable in 2025, despite its age. Pair it with a capable mid-range GPU and you'll have a system that delivers genuine enjoyment for modern games and applications.
Pros
- Exceptional value at under £85 makes this the cheapest capable processor available
- Proven architecture with years of stability and driver maturity
- AM4 ecosystem provides countless affordable motherboard options
- Adequate performance for gaming and streaming at budget cost
Cons
- Older Zen 2 architecture means lower per-core performance than newer chips
- AM4 socket reaches end of mainstream support, limiting future upgrade path
The AMD Ryzen 5 5600X sits at the premium end of our under-£150 budget, costing £139, but it delivers substantially improved performance over the older Zen 2 and Zen 3 generation chips at only slightly higher cost. This processor represents the sweet spot of Ryzen's 5000-series line, offering genuine gaming performance that rivals processors costing significantly more. The 5600X is specifically optimised for gaming workloads, with architectural improvements that translate directly to frame rates and responsiveness in modern titles. For someone building a gaming-focused system and willing to spend most of their CPU budget, this processor should be the primary consideration.
Built on Zen 3 architecture, the 5600X shows meaningful single-threaded improvements over previous generations, crucial for gaming performance where frame rates often depend on one or two cores working at maximum efficiency. The processor maintains the six-core, twelve-thread configuration but executes instructions substantially more efficiently, resulting in noticeably smoother gameplay in CPU-intensive titles. The 35MB cache provides ample memory for gaming scenarios, and the 65W TDP means you can pair it with budget cooling solutions. Published benchmarks show the 5600X trading blows with processors costing £50 to £100 more, making the value proposition exceptional.
This is the processor to choose if gaming performance is your priority and you're building within the budget tier but willing to maximise that budget for better gameplay. The AM4 socket places you on a mature platform with complete software support and proven reliability. Expect high frame rates in esports titles, smooth performance in modern AAA games at high settings when paired with suitable GPUs, and excellent multi-tasking capability. The 5600X represents the last truly competitive budget gaming processor available at this price point before you move into the premium segment.
Pros
- Outstanding gaming performance with strong single-threaded execution
- Zen 3 architecture delivers substantial improvements over older chips
- Proven platform with complete ecosystem maturity and driver support
- Exceptional value when performance is compared to processor cost
Cons
- AM4 socket with no future upgrade potential beyond Ryzen 5000-series
- Sits at absolute top of budget constraint
Buying Guide
Understanding what separates budget processors from more expensive alternatives helps you make informed decisions about whether to stretch your budget or accept compromise. Budget processors typically feature six cores and twelve threads, the baseline architecture that handles modern gaming and productivity adequately. The key differentiator at this tier is generational age: a newer generation six-core processor often outperforms an older eight-core design due to architectural improvements and efficiency gains. Clock speed matters less than you might assume; modern processors excel through instruction efficiency rather than raw MHz numbers.
Socket and platform considerations matter significantly at the budget tier. AM4 processors offer mature, complete ecosystem maturity with countless motherboard options at budget prices, but this socket is reaching end-of-life status. AM5 processors cost more for boards and future compatibility isn't guaranteed if you ever upgrade beyond the 9000-series, but investing in AM5 ensures several more years of relevance. Understanding your upgrade timeline matters: if you're building a system you'll keep for three to four years, AM4 is sensible; if you want to upgrade to a newer CPU in two years, AM5 provides more runway.
Integrated graphics matter more at the budget tier than higher price points. Processors with integrated graphics cost more but eliminate discrete GPU expenses, allowing you to build a complete system for lower total cost. However, integrated graphics performance is substantially limited compared to even entry-level discrete cards. If gaming is important, budget processors with integrated graphics mean compromising game settings and frame rates significantly. Thermal design power (TDP) indicates cooling requirements; lower TDP processors like the 5600GT at 35W allow passive cooling or quiet fan solutions, whilst higher TDP chips like the 7500X3D at 105W require adequate cooling investment.
Cache size impacts real-world performance surprisingly significantly. Larger caches (35-96MB) allow processors to retain more data locally, reducing system memory access and improving performance. Budget processors typically feature smaller caches than premium alternatives, but modern architectures compensate somewhat through efficiency. Don't assume that cache size directly translates to performance; architectural differences mean a newer six-core with 32MB cache often outperforms an older eight-core with 16MB. Gaming performance depends primarily on single-threaded speed; productivity performance scales with core count. Match the processor to your primary use case: gamers benefit from newer single-threaded performance, content creators from core count.
Value propositions change rapidly in the processor market, particularly at budget tiers where stock clearance affects pricing significantly. This guide recommends checking current prices on the date you're purchasing, as processors drop in cost when newer generations arrive. Sometimes waiting a month for newer releases yields significantly better pricing on existing inventory. Consider also that budget processor purchases often represent a larger proportion of your overall system cost; stretching the CPU budget slightly to secure a processor that handles future games better often pays dividends. However, remember that CPU performance matters less for gaming than GPU performance at budget tiers; ensure you're investing appropriately in your graphics card.
The AMD Ryzen 5 8400F stands as the definitive best choice for budget conscious builders seeking modern processor performance in 2025. This processor delivers the newest architecture available at under £150, ensuring you're not buying yesterday's technology or locking yourself into a dead-end platform. The AM5 socket provides several more generations of upgrade potential, the Zen 5 architecture excels in both gaming and productivity, and the price point of £127.99 leaves budget remaining for other components. For anyone building a new system and wanting the most future-proof option available at budget tier, the 8400F represents the obvious choice.
However, recognising that not all builders need the newest technology or forward compatibility, the AMD Ryzen 5 3600 remains the value champion for those prioritising absolute affordability. This processor proves that you can build a genuinely capable gaming and productivity system for less than £100 in processor costs, with mature ecosystem support and real-world performance that far exceeds what the price suggests. For budget conscious builders willing to accept older architecture in exchange for substantial cost savings, the 3600 delivers shocking capability.
The reality of seeking sub-£150 Intel processors in 2025 means accepting that you're likely shopping for processors that are several years old or will require premium pricing for newer variants. The AMD alternatives presented here offer substantially better value and modern capabilities. Whether you choose the newest generation 8400F for longevity, the gaming-focussed 5600X for performance, the integrated graphics option of the 5600GT for flexibility, or the extreme value of the 3600, the budget processor market remains surprisingly vibrant. The key is matching your actual use case to the processor features you genuinely need, rather than chasing specifications that don't translate to real-world improvement.
