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The HP Business PC dx6050 will not support future Athlon XP processors with front-side buses that 
operate at a 400 MHz. 

HP offers the following recommendations for maximizing performance: 

 

Dual-channel–While it is possible to configure single-channel main memory, HP recommends the 
dual-channel configuration, which doubles memory bandwidth. 

 

Matching DIMMs–When configuring dual-channel memory, HP strongly recommends using DIMMs 
that are matched in size and speed. 

 

If DIMM speeds are mismatched, memory runs at the speed of the slower DIMM. 

 

If the DIMMs are different sizes, then part of the memory configuration is dual-channel and part is 
single-channel. 

Note 

See the Appendix for more information on the impact of using mismatched 
DIMMs. 

 

Memory size–Depending on configuration, memory performance can differ between desktops with 
the same total memory size. For example, a desktop with two 128MB DIMMs may out-perform a 
system with a single 256MB DIMM (because the dual-channel configuration doubles memory 
bandwidth). Again, HP recommends the dual-channel configuration. 

 

Graphics driver–HP recommends using the graphics driver supplied with the HP Business PC 
dx6050. Using an alternative driver may impact system performance (as shown in the Appendix). 

Summary 

The NVIDIA GeForce4 MX graphics integrated into the HP Business PC dx6050 automatically receive 
an allocation of up to 64 MB of DDR main memory. 

The HP Business PC dx6050 supports single-channel and dual-channel configurations. Performance 
tests carried out by HP indicate that a dual-channel memory configuration can achieve significant 
performance gains. Some care is required when configuring memory; mismatched DIMMs or the use 
of an alternative graphics driver can degrade graphics or system performance. 

Simple, yet powerful and reliable, the HP Business PC dx6050 is an excellent investment for today’s 
small to medium business customers. 

Summary of Contents for Compaq dx6050 MT

Page 1: ...Graphics Memory for HP Business PC dx6050 Abstract 2 Introduction 2 Graphics Memory Allocation 3 Graphics Driver 3 Main Memory Configuration 4 Memory Speed 4 Summary 5 Appendix 6 Example 1 6 Example 2 7 Example 3 8 ...

Page 2: ...s white paper outlines main memory configuration issues and the performance testing and offers recommendations for optimizing the memory configuration Introduction The HP Business PC dx6050 is an AMD based business desktop from HP further broadening the range of HP business desktops available to the customer By incorporating processors chip set and integrated graphics from industry leaders AMD and...

Page 3: ... the amount of memory allocated by the Auto feature Table 1 Auto graphics memory allocation Main memory Graphics memory allocation Less than 256 MB 16 MB 256 MB 32 MB 384 MB or more 64 MB Alternatively the end user can manually specify an allocation of up to 128 MB Note If the end user specifies a graphics memory allocation that exceeds available main memory the BIOS defaults to the Auto setting H...

Page 4: ...significantly Note Performance tests carried out by HP on a HP Business PC dx6050 show the following performance gains for dual channel over single channel memory SYSmark test suites 5 6 7 6 Winstone test suites 0 4 2 9 Mad Onion 3DMark as much as 65 These test results only serve as a reference to demonstrate differences that may exist between memory configurations The results may vary with system...

Page 5: ...ory size For example a desktop with two 128MB DIMMs may out perform a system with a single 256MB DIMM because the dual channel configuration doubles memory bandwidth Again HP recommends the dual channel configuration Graphics driver HP recommends using the graphics driver supplied with the HP Business PC dx6050 Using an alternative driver may impact system performance as shown in the Appendix Summ...

Page 6: ...the specified graphics memory allocation to the top of the memory space Since memory is 128 bits wide graphics performance is optimal Note If the end user deploys an add in AGP graphics card the integrated graphics are automatically disabled the graphics memory allocation becomes available to other applications If the end user deploys a PCI graphics card the integrated graphics are likewise disabl...

Page 7: ...Figure 2 Dual channel memory with mismatched DIMMS HP graphics driver The BIOS maps upper memory to be 64 bits wide lower memory to be 128 bits wide The BIOS maps the specified graphics memory allocation to the top of the memory space the larger DIMM Since upper memory is 64 bits wide graphics performance is sub optimal ...

Page 8: ...8 bits wide The BIOS maps the specified graphics memory allocation to the top of the memory space part of the larger DIMM The allocation is 64 bits wide An alternative driver may automatically re map the graphics allocation to the faster 128 bit memory space to optimize graphics performance However the space originally allocated by the BIOS for integrated graphics is still hidden from the operatin...

Page 9: ...The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services Nothing herein should be construed as constituting an additional warranty HP shall not be liable for technical or editorial errors or omissions contained herein 371658 001 06 2004 ...

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