With all the memory talk going on, I thought this would be a good time to throw this out there. These are just some findings, I'm not concluding anything. Thought those of you with the same setup would be interested. I wish I could've tested at higher FSB speeds, but I can't get much more than 150, so I stopped there.
For those who don't know (and I'm reading straight out of my mobo manual), here is a description of the settings. If anyone is willing to elaborate on this, please do, and do so in simple words for the simple minded like me
. Also, if anyone would like to explain how they work and how they work with each other, I'd appreciate it.
CAS Latency: controls the latency between the RAM read command and the time the data actually becomes available. After the RAM receives a read command, there is a time delay before it actually carries out the command. This clock cycle delay is the CAS Latency. Apparently, this timing setting also determines the number of clock cycles it takes to complete the first part of the burst transfer. Increasing the CAS Latency will give you a bit more overclocking room, while decreasing it will boost performance slightly. So far I've found that the performance increase you get by lowering this setting isn't much, I'd rather keep it higher and squeeze a bit more fsb to boost performance.
RAS to CAS Delay: controls the latency between the DDR active command and the read/write command.
RAS Precharge Delay: controls the idle clocks after issuing a precharge command to the DDR.
Active Precharge Delay: controls the number of DDR clocks used for DDR parameters.
System:
P4 1.6a
Asus P4B533-E
1 x 256MB Corsair XMS3200
WinXP
SiSoftware Sandra memory benches:
SciSoft Sandra - CAS . 2/2/2/6 . . . . . . 2/3/3/6 . . . . . . . 2.5/3/3/7
113fsb 1:1 226ddr = 1602 / 1602 . . . 1559 / 1561 . . . 1553 / 1555 DS6 ON
125fsb 1:1 250ddr = 1785 / 1784 . . . 1738 / 1738 . . . 1731 / 1730 DS6 ON
100fsb 3:4 266ddr = 1946 / 1945 . . . 1902 / 1903 . . . 1900 / 1900 DS6 ON
133fsb 1:1 266ddr = 1934 / 1934 . . . 1888 / 1887 . . . 1878 / 1878 DS6 ON
113fsb 3:4 300ddr = 2188 / 2189 . . . 2142 / 2143 . . . 2137 / 2136 DS6 ON
150fsb 1:1 300ddr = 2169 / 2167 . . . 2114 / 2113 . . . 2105 / 2105 DS6 ON
125fsb 3:4 333ddr = 2434 / 2434 . . . 2381 / 2380 . . . 2379 / 2380 DS6 ON
133fsb 3:4 354ddr = * FAILED * . . . . 2577 / 2578 . . . 2573 / 2573 DS6 ON
150fsb 3:4 400ddr = * FAILED * . . . . 2882 / 2882 . . . 2878 / 2877 DS6 ON
100fsb 3:4 266ddr = 1946 / 1945 . . . 1903 / 1901 . . . 1901 / 1901 DS6 OFF
125fsb 3:4 333ddr = 2433 / 2432 . . . 2380 / 2382 . . . 2379 / 2380 DS6 OFF
133fsb 1:1 266ddr = 1939 / 1941 . . . 1891 / 1890 . . . 1890 / 1889 DS6 OFF
113fsb 3:4 300ddr = 2190 / 2189 . . . 2141 / 2140 . . . 2137 / 2137 DS6 OFF
150fsb 1:1 300ddr = 2172 / 2172 . . . 2118 / 2118 . . . 2118 / 2117 DS6 OFF
125fsb 3:4 333ddr = 2433 / 2432 . . . 2380 / 2382 . . . 2379 / 2380 DS6 OFF
After I disabled all USB, LAN, and Sound:
113fsb 3:4 300ddr = 2317 / 2317 . . . 2294 / 2293 . . . 2291 / 2290 DS6 ON
125fsb 3:4 333ddr = 2564 / 2564 . . . 2538 / 2539 . . . 2536 / 2536 DS6 ON
133fsb 3:4 354ddr = * FAILED * . . . . 2736 / 2735 . . . 2733 / 2732 DS6 ON
150fsb 3:4 400ddr = * FAILED * . . . . 3050 / 3050 . . . 3048 / 3048 DS6 ON
The DS6 on/off refers to the ratio hack for the P4B533-X boards. I didn't explore all the setting combinations, I simply wanted to do some experimentation with the settings to find out what would be the best settings for me at both default speeds and overclocked.
For those who don't know (and I'm reading straight out of my mobo manual), here is a description of the settings. If anyone is willing to elaborate on this, please do, and do so in simple words for the simple minded like me
CAS Latency: controls the latency between the RAM read command and the time the data actually becomes available. After the RAM receives a read command, there is a time delay before it actually carries out the command. This clock cycle delay is the CAS Latency. Apparently, this timing setting also determines the number of clock cycles it takes to complete the first part of the burst transfer. Increasing the CAS Latency will give you a bit more overclocking room, while decreasing it will boost performance slightly. So far I've found that the performance increase you get by lowering this setting isn't much, I'd rather keep it higher and squeeze a bit more fsb to boost performance.
RAS to CAS Delay: controls the latency between the DDR active command and the read/write command.
RAS Precharge Delay: controls the idle clocks after issuing a precharge command to the DDR.
Active Precharge Delay: controls the number of DDR clocks used for DDR parameters.
System:
P4 1.6a
Asus P4B533-E
1 x 256MB Corsair XMS3200
WinXP
SiSoftware Sandra memory benches:
SciSoft Sandra - CAS . 2/2/2/6 . . . . . . 2/3/3/6 . . . . . . . 2.5/3/3/7
113fsb 1:1 226ddr = 1602 / 1602 . . . 1559 / 1561 . . . 1553 / 1555 DS6 ON
125fsb 1:1 250ddr = 1785 / 1784 . . . 1738 / 1738 . . . 1731 / 1730 DS6 ON
100fsb 3:4 266ddr = 1946 / 1945 . . . 1902 / 1903 . . . 1900 / 1900 DS6 ON
133fsb 1:1 266ddr = 1934 / 1934 . . . 1888 / 1887 . . . 1878 / 1878 DS6 ON
113fsb 3:4 300ddr = 2188 / 2189 . . . 2142 / 2143 . . . 2137 / 2136 DS6 ON
150fsb 1:1 300ddr = 2169 / 2167 . . . 2114 / 2113 . . . 2105 / 2105 DS6 ON
125fsb 3:4 333ddr = 2434 / 2434 . . . 2381 / 2380 . . . 2379 / 2380 DS6 ON
133fsb 3:4 354ddr = * FAILED * . . . . 2577 / 2578 . . . 2573 / 2573 DS6 ON
150fsb 3:4 400ddr = * FAILED * . . . . 2882 / 2882 . . . 2878 / 2877 DS6 ON
100fsb 3:4 266ddr = 1946 / 1945 . . . 1903 / 1901 . . . 1901 / 1901 DS6 OFF
125fsb 3:4 333ddr = 2433 / 2432 . . . 2380 / 2382 . . . 2379 / 2380 DS6 OFF
133fsb 1:1 266ddr = 1939 / 1941 . . . 1891 / 1890 . . . 1890 / 1889 DS6 OFF
113fsb 3:4 300ddr = 2190 / 2189 . . . 2141 / 2140 . . . 2137 / 2137 DS6 OFF
150fsb 1:1 300ddr = 2172 / 2172 . . . 2118 / 2118 . . . 2118 / 2117 DS6 OFF
125fsb 3:4 333ddr = 2433 / 2432 . . . 2380 / 2382 . . . 2379 / 2380 DS6 OFF
After I disabled all USB, LAN, and Sound:
113fsb 3:4 300ddr = 2317 / 2317 . . . 2294 / 2293 . . . 2291 / 2290 DS6 ON
125fsb 3:4 333ddr = 2564 / 2564 . . . 2538 / 2539 . . . 2536 / 2536 DS6 ON
133fsb 3:4 354ddr = * FAILED * . . . . 2736 / 2735 . . . 2733 / 2732 DS6 ON
150fsb 3:4 400ddr = * FAILED * . . . . 3050 / 3050 . . . 3048 / 3048 DS6 ON
The DS6 on/off refers to the ratio hack for the P4B533-X boards. I didn't explore all the setting combinations, I simply wanted to do some experimentation with the settings to find out what would be the best settings for me at both default speeds and overclocked.