cerebrojh Posted January 5, 2006 Share Posted January 5, 2006 I am having a problem with som cosair PC3200 512MB memory sticks that are suppose to run at 400mhz but according to my Setup screen of my computer(Dell 4600) my memory is only running at 333mhz can anyone help?:confused: Thanks Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted January 5, 2006 Corsair Employee Share Posted January 5, 2006 Can you tell me our modules part# (How To Read the Memory Label) and howmany modules you have installed as well as the CPU speed and its FSB? Link to comment Share on other sites More sharing options...
cerebrojh Posted January 5, 2006 Author Share Posted January 5, 2006 module number is VS512MB400 Here is info on computer from CPU-Z CPU-Z Report -------------------------------------------------------------------------------- CPU-Z version 1.31. CPU(s) Number of CPUs 1 Name Intel Pentium 4 Code Name Northwood Specification Intel® Pentium® 4 CPU 2.66GHz Family / Model / Stepping F 2 9 Extended Family / Model 0 0 Brand ID 9 Package mPGA-478 Core Stepping D1 Technology 0.13 µ Supported Instructions Sets MMX, SSE, SSE2 CPU Clock Speed 2660.0 MHz Clock multiplier x 20.0 Front Side Bus Frequency 133.0 MHz Bus Speed 532.0 MHz L1 Data Cache 8 KBytes, 4-way set associative, 64 Bytes line size L1 Trace Cache 12 Kµops, 8-way set associative L2 Cache 512 KBytes, 8-way set associative, 64 Bytes line size L2 Speed 2660.0 MHz (Full) L2 Location On Chip L2 Data Prefetch Logic yes L2 Bus Width 256 bits Mainboard and chipset Motherboard manufacturer Dell Computer Corp. Motherboard model 02Y832, BIOS vendor Dell Computer Corporation BIOS revision A12 BIOS release date 08/26/2004 Chipset Intel i865P/PE/G/i848P rev. A2 Southbridge Intel 82801EB (ICH5) rev. 02 FSB Select 533 MHz Performance Mode enabled Graphic Interface AGP AGP Status enabled, rev. 3.0 AGP Data Transfer Rate 8x AGP Max Rate 8x AGP Side Band Addressing supported, enabled AGP Aperture Size 128 MBytes Memory DRAM Type DDR-SDRAM DRAM Size 1024 MBytes DRAM Frequency 166.2 MHz FSB:DRAM 4:5 CAS# Latency 2.5 clocks RAS# to CAS# 3 clocks RAS# Precharge 3 clocks Cycle Time (TRAS) 7 clocks # of memory modules 2 Module 0 Corsair DDR-SDRAM PC3200 - 512 MBytes Module 1 Corsair DDR-SDRAM PC3200 - 512 MBytes Software Windows version Microsoft Windows XP Home Edition Service Pack 2 (Build 2600) DirectX version 9.0c Link to comment Share on other sites More sharing options...
RJLeong65 Posted January 5, 2006 Share Posted January 5, 2006 I am having a problem with som cosair PC3200 512MB memory sticks that are suppose to run at 400mhz but according to my Setup screen of my computer(Dell 4600) my memory is only running at 333mhz can anyone help?:confused: Thanks I've just looked at the CPU that your Dell 4600 is running. You have only a 533FSB CPU (actual FSB clockspeed of 133MHz) - but running your PC3200 memory at 200MHz (DDR400) with a 133MHz FSB CPU is considered out of spec for the i865PE chipset (due to the 67MHz differential between the actual memory clockspeed and the CPU's actual FSB clockspeed), according to Intel (Intel officially supports asynchronous memory operation only up to +/-33.3MHz from the CPU's actual FSB clockspeed on their DDR1 chipsets/memory controllers). With a 533FSB CPU, you can use only PC2100 or PC2700 memory - and your VS1GBKIT400 got downclocked to 166MHz (DDR333) due to your CPU's slow 133MHz FSB clockspeed. On the other hand, your system's chipset does support 200MHz/DDR400 memory operation - but only if you have an 800FSB (actual 200MHz FSB) CPU. Link to comment Share on other sites More sharing options...
cerebrojh Posted January 5, 2006 Author Share Posted January 5, 2006 So should I change to PC2700 and stay at 333mhz or is there no way to get it up to 400mhz? Link to comment Share on other sites More sharing options...
RJLeong65 Posted January 5, 2006 Share Posted January 5, 2006 So should I change to PC2700 and stay at 333mhz or is there no way to get it up to 400mhz? Actually, Dell provides no way at all whatsoever to manually change the memory speed. So your PC3200 memory will run at 166MHz/DDR333 with your CPU no matter what. Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted January 5, 2006 Corsair Employee Share Posted January 5, 2006 This is a chipset limitation. If the FSB of your CPU is 400 For Intel and 100 MHz for AMD, the memory speed supports only DDR 266. If the FSB of your CPU is 533 For Intel and 133/166 MHz for AMD, the memory speed supports DDR 266/333 If the FSB of your CPU is 800 MHz for Intel and 200 MHz for AMD, the memory speed supports DDR 333/400 Link to comment Share on other sites More sharing options...
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