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RAM
RAM (Random Access Memory) is the working memory of your PC—the place where active programs keep the data they need right now. Because many builders prioritize the CPU and GPU, RAM can be underestimated; yet the right kit can noticeably improve responsiveness and frame pacing, especially if you plan to overclock. For broader context (including RAM considerations), see the MOTHERBOARDS page.
There are three primary specs to evaluate when choosing RAM:
Size
Measured in gigabytes (GB), capacity typically ranges from 8 GB up to 128 GB or more. More capacity lets your system juggle additional data and tasks simultaneously, which benefits heavy multitasking and demanding apps.
For gaming, 32 GB is the practical sweet spot. If you stream from the same PC or run memory-hungry software, consider 64 GB.
Frequency
Expressed in megahertz (MHz), this indicates how quickly the memory moves data. DDR4 commonly reaches a bit over 4000 MHz, while DDR5 can exceed 8000 MHz. Higher frequency usually improves throughput and reduces bottlenecks.
Frequencies can be increased via BIOS overclocking.
Latency Timings
CAS latency (CL) reflects how long memory takes to serve requested data (e.g., DDR4: CL14/16/18; DDR5: CL30/36/40). Lower values mean snappier access and better responsiveness.
Like frequency, timings can be tightened in the BIOS with careful tuning.
Thoughtfully balancing these three—capacity, speed, and latency—helps maximize performance and keep both apps and games running smoothly.
RAM in Gaming: Secondary Factors to Consider
Secondary/tertiary timings and base voltages
Beyond primary timings, parameters such as tRFC, tRAS, tRC and others influence real-world responsiveness. Optimizing them can reduce overall latency, smoothing frame delivery and minimizing micro-stutter.
Performance kits may require higher voltage for stability at elevated speeds. Ensure your motherboard and cooling can accommodate the added heat before raising voltages.
Rank
A module’s “rank” (single-rank vs dual-rank) describes how its memory chips are organized. Either can perform well; results vary with motherboard, memory controller, and game engine. There’s no universal winner—test and consult QVLs where possible.
Memory chip type/manufacturer
Vendors like Samsung, Micron, and Hynix produce different ICs (e.g., Samsung B-Die, Hynix A-Die). These influence achievable clocks and timings.
Among DDR4, Samsung B-Die is renowned for sustaining high frequency at tight timings, which is excellent for latency-sensitive gaming workloads.
Dual Channel
Use two (or more) identical sticks to enable Dual Channel, which doubles the memory bus width and boosts bandwidth. Most boards prefer slots 2 and 4 (from left to right), but always verify in your motherboard manual.
Avoid mixing modules of different brands, speeds, capacities, or timings.
RAM with Ryzen CPUs & Infinity Fabric
AMD processors are particularly sensitive to memory behavior. With DDR4 on AM4, optimal results often come from kits around 3600 MHz CL16 (CL14 if available) up to roughly 3800 MHz, which keeps the Infinity Fabric (FCLK) synchronized for best latency. Going much higher can desynchronize fabric and memory clocks, negating gains.
On AM5 (DDR5), favor low-latency kits up to about 6000 MHz CL30 (do not exceed 6400 MHz in most cases).
Infinity Fabric links CPU components at a frequency tied to memory speed; maintaining a 1:1 ratio (where applicable) is ideal for peak efficiency.
DDR5 RAM with Intel CPUs
Intel’s memory controllers generally tolerate higher DDR5 frequencies than AMD. Compatibility still depends on your CPU, motherboard (BIOS), and kit.
On many Z790 boards, ~7200 MHz is a realistic target with current firmware. Above that, stability depends heavily on the board’s QVL and tuning. If you see crashes or BSODs, update the BIOS, fine-tune voltages, or step down the frequency.
For additional guidance, refer back to the MOTHERBOARDS page.
Recommended RAM
Choose kits that match your platform’s strengths: for gaming PCs today, 32 GB (2×16 GB) with high frequency and low latency is the sweet spot; step up to 64 GB if you multitask heavily, create content, or stream on the same machine. Always check your motherboard’s QVL to ensure proven compatibility.
Recommended RAM