DFI nF4 SLI-DR Expert
GEIL DDR500--在某大的簽名檔的資料庫連結看到的是D43

Dram Frequency Set: 245(Mhz)(9/11),
Command Per Clock: Disable--1T,2T不穩 :stupefy:
CAS Latency Control(tCL): 2.5,
RAS# to CAS# Delay(tRCD): 4,
Min RAS# Active Timing(tRAS): 7,
Row Precharge Timing(tRP): 4,
Row Cycle Time(tRC): 7,
Row Refresh Cycle Time(tRFC): 16,
Row to Row Delay(tRRD): 2,
Write Recovery Time(tWR): 2,
Write to Read Delay(tWTR): 2,
Read to Write Delay(tRTW): 3,
Refresh Period(tREF): 3120,
Write CAS# Latency(tWCL): 1,
DRAM Bank Interleave: Enable,
DQS Skew Control : DecreaseSkew,
DQS Skew Value: 0,
DRAM Drive Strength: Level 8--爬文時看到某網友說雙面顆粒設8比較好 :ase
Max Async Latency: 8 NS,
Read Preamble Time: 6 NS,
Idle Cycle Limit:16--預設是256後來設32再把DDS改為Level 8後自動設為16
Dynamic Counter: Disable,
R/W Queue Bypass: 04X,
Bypass Max: 04X,
32 Byte Granulation: Disable(4 Bursts)

附帶一提最近買了2支512的優力勤的DDR400 顆粒是DT-D43直接上機也是照上面的參數不加壓穩跑490,那之前特別買的GEIL到底是.... :jolin:

R/W Queue Bypass: 是16X

Command Per Clock: Disable--2T,1T不穩--打顛倒了,抱歉

我聽說D43要上DDR500確是要設2T才行,至於和1T的差別,參數調得好的話,也沒多大分別.
我把Command Per Clock改成2T,在MemTest86中的顯示:
1T傳輸=2171MB/S
2T傳輸=2049MB/S
其他BenchMark测試沒甚麼差別,3DMark03跟本沒差.

tREF 該如何設,在dfi-street論壇見過一位網大說得很有道理:
用Everest Ultimate Edition 來看,
在 Motherboard-SPD 項目中可看見Refresh Rate.
在他所舉的例子中Refresh Rate是:Reduce(7.8uS);Self Refresh7.8uS,
由於250mHZ是相等於4nS一週,可計算出 7800nS/4nS=1950週,
因此tREF應設成最接近1950的參數.

參考一下 :)