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#1
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ddr1 memory
i got the third stick of ddr1 memory.
putting it in the system. i run a memtest. u see the cl is 2.5 not 3 which is no the stick. the bios is set to auto. should i change the bios to maual and change it back, or will it run ok with that setting. (run boinc on the system at 100%) stick is kingston valueram. |
#2
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ddr1 memory
john wrote:
i got the third stick of ddr1 memory. putting it in the system. i run a memtest. u see the cl is 2.5 not 3 which is no the stick. the bios is set to auto. should i change the bios to maual and change it back, or will it run ok with that setting. (run boinc on the system at 100%) stick is kingston valueram. If the memory settings in the BIOS are "Auto", and you add multiple sticks of memory, the BIOS will do a good job of selecting settings to use. If you set the BIOS to "Manual" and enter the numbers yourself, then *you* are responsible for selecting the right numbers to use. To make an example 1) I have one stick of memory with CAS2.5 2) I have a second stick of memory with CAS3 3) My BIOS memory section is "Auto" then the BIOS will set the memory controller to CAS3. CAS3 is exactly what is needed for (2). CAS3 is slower than the CAS2.5 in (1), so that stick is happy also. The settings selected apply to all memory sticks at the same time. The computer doesn't feed each stick different values. The sticks all share the same hardware busses, so the settings are shared values as well. The BIOS tries to select settings slow enough, so that the slowest of all the memory sticks will be satisfied and run well. HTH, Paul |
#3
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ddr1 memory
the setting are set as auto in the bios.
when i put the new stick in and i saw the setting were now lower. was wondering if it would be a problem. "Paul" wrote in message ... john wrote: i got the third stick of ddr1 memory. putting it in the system. i run a memtest. u see the cl is 2.5 not 3 which is no the stick. the bios is set to auto. should i change the bios to maual and change it back, or will it run ok with that setting. (run boinc on the system at 100%) stick is kingston valueram. If the memory settings in the BIOS are "Auto", and you add multiple sticks of memory, the BIOS will do a good job of selecting settings to use. If you set the BIOS to "Manual" and enter the numbers yourself, then *you* are responsible for selecting the right numbers to use. To make an example 1) I have one stick of memory with CAS2.5 2) I have a second stick of memory with CAS3 3) My BIOS memory section is "Auto" then the BIOS will set the memory controller to CAS3. CAS3 is exactly what is needed for (2). CAS3 is slower than the CAS2.5 in (1), so that stick is happy also. The settings selected apply to all memory sticks at the same time. The computer doesn't feed each stick different values. The sticks all share the same hardware busses, so the settings are shared values as well. The BIOS tries to select settings slow enough, so that the slowest of all the memory sticks will be satisfied and run well. HTH, Paul |
#4
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ddr1 memory
this is the setting that the bios has set at boot time.
2.5-3-3-7 from a memtest program. |
#5
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ddr1 memory
john wrote:
this is the setting that the bios has set at boot time. 2.5-3-3-7 from a memtest program. If you had a stick with a rating of 3-3-3-8, then the BIOS would have made a mistake. If all the sticks are CAS 2.5 or CAS 2.0, then that would be a good setting. You'd really need to give a full description of each stick. You can get details from CPUZ. Run the .exe. Go to "About" tab. Select "Register Dump txt" and it will make a text file with the results for your computer. http://www.cpuid.com/cpuz.php ******* This is a selective snip from my cpuz.txt register dump. The "DIMM" part, is what the DIMM is "advertising" as options. The SPD chip on the DIMM, holds this timing table, and CPUZ can read it out. DIMM #1 Timings table Frequency (MHz) 200 266 333 CAS# 3.0 4.0 5.0 RAS# to CAS# delay 3 4 5 RAS# Precharge 3 4 5 TRAS 9 12 15 TRC 12 16 20 Copy over each DIMM table. My second DIMM is the same as the first. DIMM #2 Timings table Frequency (MHz) 200 266 333 CAS# 3.0 4.0 5.0 RAS# to CAS# delay 3 4 5 RAS# Precharge 3 4 5 TRAS 9 12 15 TRC 12 16 20 The section above that, called "Chipset", shows what my BIOS selected as operating conditions Chipset Northbridge VIA PT880 Pro rev. 00 Southbridge VIA VT8237S rev. 00 Graphic Interface AGP AGP Revision 3.0 AGP Transfer Rate 8x AGP SBA supported, enabled Memory Type DDR2 Memory Size 2048 MBytes Channels Dual Memory Frequency 266.0 MHz (3:4) ----- 266*2 means DDR2-533 in my case DRAM Interleave 4-way CAS# 3.0 \ RAS# to CAS# 3 \___ BIOS is using 3-3-3-12, because RAS# Precharge 3 / I forced it to do that :-) Cycle Time (tRAS) 12 / Command Rate 1T ******* If you want comments on your particular settings, then provide some info from the CPUZ register dump. Paul |
#6
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ddr1 memory
this is the dump.
Chipset ------------------------------------------------------------------------------ Northbridge NVIDIA GeForce 6100 rev. A2 Southbridge NVIDIA nForce 410/430 MCP rev. A3 Memory Type DDR Memory Size 2560 MBytes Channels Single Memory Frequency 157.9 MHz (CPU/14) CAS# 2.5 RAS# to CAS# 3 RAS# Precharge 3 Cycle Time (tRAS) 7 Bank Cycle Time (tRC) 10 DRAM Idle Timer 16 Command Rate 2T Memory SPD ------------------------------------------------------------------------------ DIMM #1 General Memory type DDR Manufacturer (ID) Kingston (7F98000000000000) Size 1024 MBytes Max bandwidth PC3200 (200 MHz) Part number K Serial number 732698DC Manufacturing date Week 24/Year 07 Attributes Number of banks 2 Data width 64 bits Correction None Registered no Buffered no Nominal Voltage 2.50 Volts EPP no XMP no Timings table Frequency (MHz) 166 200 CAS# 2.5 3.0 RAS# to CAS# delay 3 3 RAS# Precharge 3 3 TRAS 7 8 DIMM #2 General Memory type DDR Manufacturer (ID) Kingston (7F98000000000000) Size 512 MBytes Max bandwidth PC3200 (200 MHz) Part number K Serial number 600FC249 Manufacturing date Week 49/Year 05 Attributes Number of banks 2 Data width 64 bits Correction None Registered no Buffered no Nominal Voltage 2.50 Volts EPP no XMP no Timings table Frequency (MHz) 133 166 200 CAS# 2.0 2.5 3.0 RAS# to CAS# delay 2 3 3 RAS# Precharge 2 3 3 TRAS 6 7 8 DIMM #3 General Memory type DDR Manufacturer (ID) Kingston (7F98000000000000) Size 1024 MBytes Max bandwidth PC3200 (200 MHz) Part number K Serial number 64316877 Manufacturing date Week 12/Year 06 Attributes Number of banks 2 Data width 64 bits Correction None Registered no Buffered no Nominal Voltage 2.50 Volts EPP no XMP no Timings table Frequency (MHz) 133 166 200 CAS# 2.0 2.5 3.0 RAS# to CAS# delay 2 3 3 RAS# Precharge 2 3 3 TRAS 6 7 8 |
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