I need to build a PC soon because I'll be moving somewhere that has very expensive computer parts, and delaying the purchase could make things even more costly. I need 32 GB of DDR4 memory, but fitting high-end RAM into my budget would be difficult. I'm considering a Ryzen 7 5700 because its performance and price seem appealing, although I could choose a less expensive CPU if better memory would make a meaningful difference.
How much performance would I lose by using inexpensive 2666 MT/s RAM instead of basic 3200 MT/s modules? I've found comparisons involving standard and extremely fast memory, but not much information about slower kits. I'd especially appreciate a rough performance estimate and advice on the minimum memory speed worth buying.
3 Answers
The difference between 2666 and 3200 MT/s is generally modest—around a few percent in many gaming benchmarks, though the exact result depends on the game and settings. Around 2400 MT/s is where the performance loss becomes more noticeable. If 2666 is dramatically cheaper, it can work, but 3200 MT/s is the better baseline when the price difference is small.
3200 MT/s is a sensible target and usually isn’t much more expensive than slower memory. 3600 MT/s can be a little better for Ryzen, but it isn’t essential. Also, double-check the processor choice: the Ryzen 7 5700 has less L3 cache and uses PCIe 3.0, while the 5700X has more cache and PCIe 4.0. A Ryzen 5 5600 or 5600X may also be a better value if you need to save money.
I’d prioritize 32 GB of capacity and a decent 3200 MT/s kit over premium memory timings or very high speeds. Avoid paying extra for enthusiast-grade RAM. If the budget only allows 2666 MT/s, it won’t cripple the system, but lowering the CPU to a Ryzen 5 5600 and keeping 32 GB of 3200 MT/s memory may give you a better-balanced build.
So 2666 MT/s would still be reasonable if it saves a significant amount of money?