FAQ
TL;DR: Upgrading i5-2500S to i3-8100 delivers ~30% single‑core and ~50% multi‑core gains; “replace if CPU is the limit.” [Elektroda, dt1, post #17010692]
Why it matters: This FAQ helps DDR3 owners decide the smartest CPU/motherboard path for gaming and everyday work with an R9 280-class GPU.
Quick Facts
- Moving from 2nd‑gen to 4th‑gen Intel isn’t worth it; sell DDR3 and jump to DDR4 instead. [Elektroda, dt1, post #17008854]
- i3‑8100 + Asrock Z370 Pro4 + 8 GB DDR4 came to ~PLN 1,170 for the OP. [Elektroda, komandor64, post #17010303]
- Z170 boards started ~PLN 300–350; Z370 from ~PLN 450, with cheaper chipsets expected later. [Elektroda, dt1, post #17009553]
- R9 280 pairs fine with CPUs up to i5‑7400/7500 class; i3‑8100 is comparable. [Elektroda, dt1, post #17009400]
- Xeon E3‑1230 v2 (LGA1155) was suggested as a ~PLN 4xx option for more threads. [Elektroda, Dra98, post #17009462]
Is upgrading from i5‑2500S to a 4th‑gen Intel worth it if I keep DDR3?
No. The jump from 2nd‑gen to 4th‑gen is called pointless in the thread. The recommended path is to sell DDR3, move to DDR4, and pair i3‑8100 with a Z370 board. That route gives meaningful gains and a modern platform. [Elektroda, dt1, post #17008854]
Ryzen 5 1500X on AM4 vs i3‑8100—what’s better for mixed use and gaming?
Performance trades blows. “In some applications it will be better, in others it will be worse.” For general apps and games, the expert favored i3‑8100 at the time. AM4 means a Ryzen platform that requires DDR4, so budget for new RAM. [Elektroda, dt1, post #17009297]
Will my R9 280 bottleneck with an i3‑8100?
No. R9 280 was fine with i5‑4xxx/7xxx era CPUs, and i3‑8100 performs in that ballpark. Expect smooth pairing at 1080p with appropriate settings. [Elektroda, dt1, post #17009400]
Should I consider an LGA1155 Xeon (E3‑1230 v2) instead of a new platform?
It’s viable if you need more threads on the old board. E3‑1230 v2 offers strong multi‑threaded performance and appeared around PLN 4xx in discussion. It avoids a board/RAM swap, but you stay on an aging platform. [Elektroda, Dra98, post #17009462]
How much faster is a Xeon upgrade over i5‑2500S in real apps?
Expect about 10–15% in apps using up to four threads. Gains can exceed 50% where many threads are used. That makes sense for workloads like heavy multitasking or content tools. [Elektroda, dt1, post #17009553]
What total budget did the OP land on for i3‑8100 + Z370 + DDR4?
About PLN 1,170 for CPU, Asrock Z370 Pro4, and 8 GB DDR4. That figure reflects real prices discussed and helps plan a similar swap today. [Elektroda, komandor64, post #17010303]
Are Z370 motherboards overpriced, and will cheaper chipsets help?
Z370 started around PLN 450, while Z170 could be PLN 300–350. Cheaper chipsets were expected to arrive later, reducing total platform cost. [Elektroda, dt1, post #17009553]
How do I tell if the CPU or GPU is my gaming bottleneck?
Try this: 1) Test the GPU in a faster PC with the same settings. 2) Watch in‑game CPU/GPU usage and frame times. 3) Rule out PSU faults by swapping a known‑good unit. If performance jumps on a stronger CPU, your CPU was the limit. [Elektroda, dt1, post #17010777]
My PC freezes and shuts down—could it be the motherboard?
Maybe, but also check the power supply. Random freezes and shutdowns can indicate PSU issues, even with reputable brands. Swap in a good PSU before condemning the board. [Elektroda, dt1, post #17010777]
Is the i3‑8100 only ~15–20% faster than a stock i5‑2500?
One participant cited a 15–20% edge in some tests and questioned value versus cost. Treat this as a conservative view focused on selected apps. Context matters. [Elektroda, Jawi_P, post #17010427]
What performance gain did swapping to an i5‑4690K show with the same R9 280?
The user reported a “colossal difference” at the same game titles and settings when moving the R9 280 to an i5‑4690K system. That points to previous CPU limitation. [Elektroda, komandor64, post #17010837]
Does moving to Z370 now leave room for a later CPU upgrade?
Yes. The advisor noted Z370 keeps the door open to replace the processor with a six‑core i5/i7 later if needed. “If the processor is currently a limitation…it is worth replacing.” [Elektroda, dt1, post #17010692]
Does Ryzen require DDR4, and what is AM4 in this context?
Yes, the OP observed Ryzen platforms require DDR4. AM4 refers to the AMD motherboard socket used with CPUs like the Ryzen 5 1500X mentioned in the thread. Plan for new RAM if you switch. [Elektroda, komandor64, post #17008410]