questions about upgrading RAM..

[vansugar24]

ok, so to start it off, i have a D915GAV motherboard
it comes with 4 slots for RAM.

1st question- is single sided memory compatible with double?
2nd question- i bought a 1GB stick of RAM and it works with another stick of 512MB of RAM, but i can't get another stick of 512MB to work with those first two.. do the 2x512MB sticks of RAM have to go together in slot 3&4?

just to add this in here, 2 slots in two channels. (channel a and channel b)

so i have 1GB and 512MB in channel A but i can't seem to get my bios to detect anything in channel B..

help?

[Steve R Jones]

Four 184-pin DIMM connectors supporting up to four double-sided DIMMs
DDR400/333 SDRAM memory
Designed to support up to 4 GB2 of system memory
D915GAV, Features

What are the specs of all four chips?

[vansugar24]

#1

Field Value
Memory Module Properties
Module Name LIFETIMEMEMORY.COM
Serial Number None
Module Size 1024 MB (2 ranks, 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)

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


#2

Field Value
Memory Module Properties
Module Name Kingston K
Serial Number 0326280Ah
Manufacture Date Week 51 / 2005
Module Size 512 MB (2 ranks, 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

Memory Module Manufacturer
Company Name Kingston Technology Company, Inc.
Product Information Kingston Technology Company - Product Information - Product Summary



the third one i'm having questions about is a 512MB DDR 400MHz -ONE SIDED- stick of RAM. is it not compatible at all?