new key technologies and features of HP Compaq Business Desktop d530 series
4
HT Technology enables PC usage models previously deemed “impractical”. Typically
with processor intensive applications and certain workloads, the PC becomes
unresponsive and the user is unable to perform any other tasks - basically while the PC
works on one thing you cannot do anything else.
DDR Memory
The Intel 865G chipset supports DDR non-ECC (error checking and correction)
memory. Three speeds are supported: PC3200 DDR (400MHz), PC2700 DDR
(333MHz) and PC2100 DDR (266MHz).
The 865G chipset supports both single and dual channel DDR memory configurations.
Memory can be populated in singles or in pairs, but for best performance, memory
should be populated in matched pairs (1 DIMM per channel) and all DIMMs should
be the same speed. If not all the same speed, maximum operation speed is determined
by the slowest DIMM in the system.
With the 865G chipset, actual memory speed is determined by the processor in the
system. Refer to the following chart:
CPU
FSB
(MHz)
Memory Type
Inserted
Actual
Memory
Speed (MHz)
Notes
PC3200 266
400MHz DDR results in no performance
increase
PC2700 266
333MHz DDR results in no performance
increase
400
PC2100 266 optimal
PC3200 333
400MHz DDR results in no performance
increase
PC2700 333 optimal
533
PC2100 266
PC3200 400 optimal
PC2700 320
800
PC2100 266
In order to realize the benefit of dual channel, the following rules must be followed:
DIMMs must be same density (size): 128MB, 256MB, etc.
DIMMs must be same DRAM technology: based on 128Mb, 256Mb, etc.
DIMMs must be same DRAM bus width (x8 or x16 bits)
DIMMs must be all single-sided or dual-sided
Channels must be symmetrical – 2 or 4 DIMMs; 3 DIMMs is non-symmetrical so
will not get dual channel benefit
If speeds are mis-matched, actual speed will default to slowest DIMM in the
system.
Refer to "Configuring DDR Memory in hp business desktops” whitepaper for more
detailed information.
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