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<blockquote data-quote="SciDoctor" data-source="post: 280215" data-attributes="member: 11346">I think the problem is down to pci bus bandwidth and latanecy . (NOT AGP ,NOT pci-e)From my own testing with an AIW9000pci and the excellent HD2400pci the 32 bit pci bus has some severe limitations when data throughput is busy.Moving these cards onto a 64bit pci-x bus and these limitations were not present, i don't think either card was fully 64 bit compliant but the extra bandwidth availble on the pci-x bus allowed them to reach closer to their theoretical maximum more so tan the restrictive 32 bit bus.The 32 bit pci bus is so busy and shared with many other devices, this is where latency settings can make or break bandwidth hungry devices.Drivers can implicitly set higher latency (ie the time on the bus is increased for that device) or you can use an app called 'pci latency' to change settings for all devices.LAN drivers can set their latency too high and Creative drivers are notorious for ridiculous latency (to make up for their cr-ap drives I think)So raising latency for your pci GPU and lowering others can help give data time on the bus to complete transactions .Obviously this can only help to a certain amount as the DRIVERS for your NV card may not be that good.The pci HD 2400 allows full VISTA aero and gives excellent smooth MP operation at 50FPS sync from my testing.</blockquote>

[QUOTE="SciDoctor, post: 280215, member: 11346"] I think the problem is down to pci bus bandwidth and latanecy . (NOT AGP ,NOT pci-e) From my own testing with an AIW9000pci and the excellent HD2400pci the 32 bit pci bus has some severe limitations when data throughput is busy. Moving these cards onto a 64bit pci-x bus and these limitations were not present, i don't think either card was fully 64 bit compliant but the extra bandwidth availble on the pci-x bus allowed them to reach closer to their theoretical maximum more so tan the restrictive 32 bit bus. The 32 bit pci bus is so busy and shared with many other devices, this is where latency settings can make or break bandwidth hungry devices. Drivers can implicitly set higher latency (ie the time on the bus is increased for that device) or you can use an app called 'pci latency' to change settings for all devices. LAN drivers can set their latency too high and Creative drivers are notorious for ridiculous latency (to make up for their cr-ap drives I think) So raising latency for your pci GPU and lowering others can help give data time on the bus to complete transactions . Obviously this can only help to a certain amount as the DRIVERS for your NV card may not be that good. The pci HD 2400 allows full VISTA aero and gives excellent smooth MP operation at 50FPS sync from my testing. [/QUOTE]

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