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- Dec 20, 2004
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- Sydney Australia
how does the LDT work? why do we have to turn it down to make our OC stable?
How does the calculation work?
How does the calculation work?
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LDT multiplier on AV8
- Thread starter Reyn
- Start date
The HTT speed times the LDT (HTT multi) results in the effective HyperTransport-speed - which is 1000MHz by default (HTT 200 x LDT 5 = 1000 MHz HT-speed).
As this bus only communicates with the peripherals (hard drives, soundcard, AGP card, LAN, etc) there is no performance gain in going higher than stock speed - and probably no significant loss in reducing it a bit. The HT-bus is far from a bottleneck as 4 GB data can be transferred each way per second. However you risk instability if setting the total HT-speed higher than stock speed (as with any other component). The HT seems to be extra sensitive to OCing tho, which is probably due to the non-existent performance gain you would see from overclocking it. There is simply no need for the mobo-manufacturers to put any emphasis on this, as it is more than adequate at stock speed.
The HTT (which both the internal CPU speed - and the effective HT-speed is derived off of) has to be increased in order to overclock the memory and CPU (unless using one of the fully unlocked FX-CPUs - in that case the CPU can be OCed without adjusting the HTT). If for example increasing the HTT to 250, you should reduce the LDT multi to 4 to ensure stability.
As this bus only communicates with the peripherals (hard drives, soundcard, AGP card, LAN, etc) there is no performance gain in going higher than stock speed - and probably no significant loss in reducing it a bit. The HT-bus is far from a bottleneck as 4 GB data can be transferred each way per second. However you risk instability if setting the total HT-speed higher than stock speed (as with any other component). The HT seems to be extra sensitive to OCing tho, which is probably due to the non-existent performance gain you would see from overclocking it. There is simply no need for the mobo-manufacturers to put any emphasis on this, as it is more than adequate at stock speed.
The HTT (which both the internal CPU speed - and the effective HT-speed is derived off of) has to be increased in order to overclock the memory and CPU (unless using one of the fully unlocked FX-CPUs - in that case the CPU can be OCed without adjusting the HTT). If for example increasing the HTT to 250, you should reduce the LDT multi to 4 to ensure stability.
