RAM problems - bad stick?

[tchiseen]

I've got 2 sticks of pc3200 ram on my mobo (for specs check my computer options) but its not running at 400 mhz!! its running at 320 mhz (effective, 160 real clock) needless to say, im po'd.
is there anything i can do with the timings to make the sticks run at the full 200? they're both supposed to! i can get 400mhz with just the kingmax, but having only 512 proves a BIG drop in performance.

Detailed Info from Everest: (i've taken out empty feilds) note the timings are basically the only things i see different. HELP! i've also added mobo info too.


* DIMM 1:

Memory Module Properties
Module Name Kingmax MPXC22D-38KT3R-FHA
Module Size 512 MB (2 rows, 4 banks)
Module Type Unbuffered
Memory Type DDR SDRAM
Memory Speed PC3200 (200 MHz)
Module Width 64 bit
Module Voltage SSTL 2.5
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh
Memory Timings
@ 200 MHz 2.5-4-4-8 (CL-RCD-RP-RAS)
@ 133 MHz 2.0-3-3-6 (CL-RCD-RP-RAS)
Memory Module Features
Early RAS# Precharge Not Supported
Auto-Precharge Not Supported
Precharge All Not Supported
Write1/Read Burst Not Supported
Buffered Address/Control Inputs Not Supported
Registered Address/Control Inputs Not Supported
On-Card PLL (Clock) Not Supported
Buffered DQMB Inputs Not Supported
Registered DQMB Inputs Not Supported
Differential Clock Input Supported
Redundant Row Address Not Supported

* DIMM 2

Memory Module Properties
Module Name Mosel
Module Size 512 MB (2 rows, 4 banks)
Module Type Unbuffered
Memory Type DDR SDRAM
Memory Speed PC3200 (200 MHz)
Module Width 64 bit
Module Voltage SSTL 2.5
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh

Memory Timings
@ 200 MHz 3.0-3-3-8 (CL-RCD-RP-RAS)
@ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)
@ 133 MHz 2.0-2-2-6 (CL-RCD-RP-RAS)

Memory Module Features
Early RAS# Precharge Not Supported
Auto-Precharge Not Supported
Precharge All Not Supported
Write1/Read Burst Not Supported
Buffered Address/Control Inputs Not Supported
Registered Address/Control Inputs Not Supported
On-Card PLL (Clock) Not Supported
Buffered DQMB Inputs Not Supported
Registered DQMB Inputs Not Supported
Differential Clock Input Supported
Redundant Row Address Not Supported

* MOBO:
Motherboard Properties
Motherboard ID 65-0702-000000-00101111-110404-I848P$AH002001_BIOS Date: 11/04/04 20:48:18 Ver: 08.
Motherboard Name Asus P4P800S-X

Front Side Bus Properties
Bus Type Intel NetBurst
Bus Width 64-bit
Real Clock 200 MHz (QDR)
Effective Clock 800 MHz
Bandwidth 6400 MB/s

Memory Bus Properties
Bus Type DDR SDRAM
Bus Width 64-bit
Real Clock 160 MHz (DDR)
Effective Clock 320 MHz
Bandwidth 2560 MB/s

Chipset Bus Properties
Bus Type Intel Hub Interface
Bus Width 8-bit
Real Clock 67 MHz (QDR)
Effective Clock 267 MHz
Bandwidth 267 MB/s

Motherboard Physical Info
CPU Sockets/Slots 1 Socket 478
Expansion Slots 4 PCI, 1 AGP
RAM Slots 2 DDR DIMM
Integrated Devices Audio, LAN
Form Factor ATX
Motherboard Size 170 mm x 300 mm
Motherboard Chipset i848P
Extra Features JumperFree, Stepless Freq Selection

 

[zephead]

your chipset does not support ddr400, so the ddr400 modules will run at the chipset's limit of ddr333. also with your chipset, DDR333 modules are underclocked to DDR320 specs, when a 800mhz cpu fsb is active. this is to minimize latencies.

 

[tchiseen]

uh, im sorry to disagree with you, but not only does it say riight on the box that it supports ddr400, but i can get a single stick to run at ddr400.

baring this, is there anything i can do (lower fsb) to get more performance?

 

[zephead]

according to the intel website, the i845 series of chipsets do not natively support ddr400. in your case, perhaps the board ran a single stick at ddr400, but when another non-identical stick was added it dropped down to ddr333. in the end, because of the 800mhz fsb, it dropped again to ddr320.