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Anyone know what memory works best with Asus P5B-E mobod? Any specific brand? Also, will I notice a difference between the 667 or 800 speed?

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Dani AI

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Short answer: use a matched dual‑channel DDR2 kit from a reputable maker and prioritize capacity and timing over headline MHz. As noted, reputable vendors are a safe choice; was right to ask whether 800 vs 667 matters — for a non‑overclocked P5B‑E system the everyday difference is small, while dual‑channel and correct timings matter more.

Why: Core‑era Intel boards set memory speed in relation to the FSB and chipset, so raw DDR2‑800 bandwidth is often not fully exploited in typical desktop workloads. Dual‑channel (two matched sticks in the correct colour slots, e.g. DIMM_A2 + DIMM_B2) yields a bigger practical bandwidth gain than a single faster module. Lower CAS/command latencies and having enough total RAM will usually improve responsiveness more than the bump from 667 to 800 MHz.

Practical tips:

  • Buy a matched dual‑channel kit (same part number/kit) rather than mixing modules.
  • Check the motherboard QVL and update the BIOS before installing new RAM for best compatibility.
  • Most DDR2 runs at 1.8V by default; only raise voltage if the RAM vendor specifies it and the board supports it.
  • If the system is unstable after changes, try reseating modules, then run Memtest86 (or similar) to isolate bad DIMMs.
  • If cost is close, go for DDR2‑800 dual kit; otherwise choose the lowest latency 667 kit that fits your budget.

This keeps the build stable and gives the best real‑world gains for a P5B‑E without overclocking.

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I've had great luck with

Member Avatar for Member #23858

G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory


This has been given some good reviews by some.


Is there a difference in speed between the 800 and the 667?


No overclocking.

Member Avatar for dcc

This article is almost a year old but may shed some light on your question. It would appear that the FSB of the Intel CPUs is actually a potential bottle neck for faster speeds.

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