How Is Breaking The 4 GHz Barrier Possible?
A closer look at the processing cores in the 805 CPU reveals that the device is fabricated with a B0 product code (stepping). The first core in the 800 series on which this CPU is based was fabricated using the older A0 version instead.
The first items Intel fabricated in the 800 series were delivered with A0 version cores
The successor series used the B0 version cores, and this is the series to which the Pentium D 805 cores belong.
There aren't any significant differences between the two versions when it comes to energy saving functions or instruction sets, but it's easy to recognize from the B0 version that the Pentium D 805 really belongs to the second production series for this CPU. The motivation for a version update usually comes from further optimizations to the circuit layout or fabrication process, as well as corrections for design or behaviour errors. On all counts, the B0 version is an improvement over the older A0 version. Since this version could handle CPU clock rates of 3.2 GHz at the beginning of the series without any problems, a consequence of these improvements is that all B0 version CPUs should be able to handle CPU clock rates of at least 3.2 GHz. This was the theory we formulated before we started testing the Pentium D 805.
|Processor||Clock Rate||Version||sSpec Number|
|Pentium D 840||3.20 GHz||A0||SL88R|
|Pentium D 830||3.00 GHz||A0||SL88S|
|Pentium D 820||2.80 GHz||A0||SL88T|
|Pentium D 840||3.20 GHz||B0||SL8CM|
|Pentium D 830||3.00 GHz||B0||SL8CN|
|Pentium D 820||2.80 GHz||B0||SL8CP|
|Pentium D 805||2.66 GHz||B0||SL8ZH|
Of course, we would like to keep the cost down as much as possible.
We have no idea where the best bang for the buck will be. For us a stable system is more important than blazing speed. Thus, the HP's worked fine for what we originally got them for; it’s just that our graphics and video production software are forcing upgrades in speed and power.
The D850 chip sounds incredible and the power supply we already have to get will handle overclocking that chip. It even sounds like that chip will work in the existing mobo if we can find a way to change the clock speed from inside windows instead of from the BIOS. HP BIOS does not allow adjusting the clock speed in the BIOS but can't BIOS just be changed as well; isn't it just an EPROM?
Anyway, even if we opt for changing out the mobo for another case compatible Asus mobo, we still have to answer the question of which board and chip combination will give us the most stable service for the least cost.
Any ideas that might help us plan the most appropriate upgrade and the least cost?
With the price of components that you need to make this run stable, and the amount of electricity that this would use, a cheap Core 2 and motherboard and DDR2 memory would cost you less in the long run.
Intel Pentium Dual Core E5200
Kingston DDR2 2x2GB 800MHz
This should cost less than $200.
no hate pl0x