The claim is that the tweak (IRQn=4096) improves network performance by allocating 4 megabytes of memory as a buffer for the IRQ (n) used by your network adapter. However:
- The setting has no effect on actual memory allocation.
- The setting does not actually affect network performance in carefully controlled tests. (Anecdotal reports are mixed and unreliable due to Internet and system variables, particularly the effects of caching.)
- There is no apparent evidence that there even is any such setting in Microsoft documentation.
- Windows does not allocate buffer memory for IRQs. (Buffers are the responsibility of device drivers, which allocate them by device, not by IRQ. On the PCI bus, a single IRQ can be shared by multiple devices.)
While it doesn't help, the good news is that (like TTL) this setting doesn't hurt (assuming you don't screw up your SYSTEM.INI file). Windows just ignores settings that it doesn't recognize.reference
last modified: 2009-10-24 02:29:52