I know nothing about AMD CPUs
I know the best bang for your your buck has always been AMD
AMD does not have ANY sort of automatic "win" in the value segment anymore. The market conditions that allowed Intel to run a price premium, sell a name, etc, while AMD offered premium performance at bargain basement prices are over. In every price class that there is competition from each brand, there are valid trade-offs involving considerations such as:
- Single threaded performance
- Multi-threaded performance
- performance scaling
- compute efficiency
- platform connectivity/value differences
Think of an AMD "core" as part of a "tandem threaded" module. The performance scaling works very roughly as follows:Modern AMD "core" assigned a ~0.9-1.0 to represent the zambezi/vishera classes. The following ratios apply assuming equal clock speed
Single thread running on AMD module: performance = ~0.90X - 1.0X
2 threads running on AMD module: performance = ~1.65X - 1.85X
Single thread running on Intel core (SB-Haswell): performance = ~1.40X - 1.65X
2 threads running on Intel core w/out hyperthreading = ~1.40X - 1.65X
2 threads running on Intel core w/hyperthreading = ~1.40X - 2.25X
From the multipliers above, one can then
apply clock speed differentials to determine a ballpark performance comparison of different chips. Don't forget to include a reasonable estimate of turbo-core speeds for different scenarios.
Note that AMD chips are currently running about 30% less compute efficient than similar generation Intel chips. This manifests as a demand for greater cooling performance and heavier VRM configurations on motherboards.
AMD offers an alternative to Intel at a competitive price. There is no "obvious" win across the board from any AMD chip. Whether or not the AMD chip is the better value for YOUR particular build is highly dependent on what the build will be used for. The majority of games
that are CPU bound will run faster on an i5 than they will on an AMD chip because the i5 has performance where it counts for most CPU bound games (single threaded performance).
Best of luck in your new upcoming build.