Processors/Comparison
15 specifications
AMD FX-6300 vs AMD Ryzen 3 3300X
On paper, the AMD FX-6300 has more cores (6 against 4), the AMD Ryzen 3 3300X boosts higher, and the AMD Ryzen 3 3300X carries more L3 cache. Specifications describe what each chip is designed to do; how much of that either one holds under continuous load is a separate question.
AMD FX-6300
AMD · FX (Vishera) · Desktop
AMD Ryzen 3 3300X
AMD · Ryzen 3000 · Desktop
Cores and clocks
Cache and power
Platform
A check marks the higher figure only on rows where higher is unambiguously better. Rows without one are not ties; they are specifications where “better” has no meaning.
Reading the table
What the difference means.
Cores and threads
This pair splits: the FX-6300 has more cores (6 against 4) while the Ryzen 3 3300X runs more threads (8 against 6). That happens when one design runs two threads on every core and the other does not, or mixes large and small cores. A second thread on a core adds roughly a quarter to a third of a core's work, not a whole one, so 6 full cores and 8 threads on 4 cores land closer together than either number suggests. Work that spreads across everything, such as rendering, compiling and video export, is where the difference shows; which side wins it depends on how fast each core is, which a specification sheet does not say.
Boost clock
The Ryzen 3 3300X boosts to 4.3 GHz against 3.8 GHz, 13 percent higher. Across generations it is not a guide to speed on its own, for the reason above. Boost is also a peak: it is held for seconds to minutes, on one or two cores, while the cooling and the power limit allow. What either chip settles at under a long load is lower, and it depends on the cooler and the motherboard as much as the chip.
Cache
The Ryzen 3 3300X carries 16 MB of L3 cache against 8 MB. Cache is fast memory on the chip, and a larger one means the cores wait on main memory less often. Games, large spreadsheets and compiling respond to it; rendering and video export, which stream through data in order, respond much less.
Power and cooling
The FX-6300 is rated at 95 W against 65 W. The rating is the heat the cooler has to move for the chip to hold its speed, and modern chips draw well above it in short bursts. A competent tower cooler suits the FX-6300; the Ryzen 3 3300X is easier to keep quiet and fits smaller cases. A chip whose cooling falls short does not fail. It slows down, and it does so after the first minute, which is why short benchmarks miss it.
Platform
They use different sockets, AM3+ and AM4, so moving from one to the other means a new motherboard. For an upgrade, that cost belongs in the comparison; for a new build, the newer platform is the one with later chips still to come.
Manufacturing process
The Ryzen 3 3300X is built on a 7 nm process against 32 nm. A finer process generally does the same work for less power. The names are marketing labels rather than measurements, though, and they are not comparable between manufacturers, so treat the row as a sign of how recent the design is and no more.
Which to pick, on paper
- Rendering, compiling, video export
- Ryzen 3 3300X
- 8 threads against 6. Work that uses every thread scales with how many there are.
- A quiet or compact build
- Ryzen 3 3300X
- 65 W against 95 W: less heat to move, so a smaller cooler and slower fans.
What no table says
How much of its speed a processor keeps after the first minute depends on the cooling and the power limit of the machine it is in. If you own one of these, measure it: the test is free and runs in this browser.
Questions
- Is the FX-6300 better than the Ryzen 3 3300X?
- By need, on the specifications: rendering, compiling, video export: the Ryzen 3 3300X; a quiet or compact build: the Ryzen 3 3300X. No specification says how much speed either one keeps under a long load; that depends on the cooling and the power limit of the machine it is in, and it is what a sustained test measures.
- Do the FX-6300 and the Ryzen 3 3300X use the same socket?
- No. The FX-6300 uses AM3+ and the Ryzen 3 3300X uses AM4, so switching means a new motherboard.
- Which runs hotter, the FX-6300 or the Ryzen 3 3300X?
- The FX-6300 is rated at 95 W against 65 W, so it produces more heat under load and needs the larger cooler. How hot either one actually runs depends on the cooler and the case more than on the chip.
More comparisons
- AMD FX-6300 vs Intel Core i3-14100
- AMD FX-6300 vs Intel Core i3-14100F
- AMD FX-6300 vs AMD Ryzen 5 1600
- AMD FX-6300 vs Intel Core i7-6850K
- AMD FX-6300 vs Intel Core i5-8400
- AMD Ryzen 3 3300X vs Intel Core i3-12100
- AMD Ryzen 3 3300X vs Intel Core i3-12100F
- AMD Ryzen 3 3300X vs Intel Core i7-4790K
- AMD Ryzen 3 3300X vs AMD FX-4350
- AMD Ryzen 3 3300X vs Intel Core i3-14100
Every figure on this table is a design target. None of it is a measurement.
Nothing above describes how a processor behaves twenty minutes into a sustained workload, which is where two chips with nearly identical specifications routinely diverge. A boost clock is a ceiling the vendor permits, not a rate the chip sustains, and whether it holds depends on the cooling, the case, the power profile and the room. None of those appear on a specification sheet.
We deliberately do not reduce these figures to a single score. A composite invented from specifications would look authoritative and measure nothing, and choosing the weights would be choosing the winner.