Iwill BD133u i815EP B stepping

Tuesday, September 18, 2001


The Iwill BD133u motherboard is based around the i815EP B stepping chipset, which makes it compatible with Intel Pentium 3 "Tualatin" processors. The BD133u is in fact the 3rd such board we've received for review, and comes with a reasonable range of Overclocking functions - something we couldn't say about the previous two "Tualatin" boards we received (such as the Intel Easton2). Furthermore, the BD133u comes with an onboard soundcard based on theC-Media CM18738 audio chip which is enough to make the Iwill BD133u a very interesting board to review.

So, without further ado, onto the review...

Characteristics of the Iwill BD133u
Pentium III (FC-PGA) or Celeron processor, including "Tualatin"
i815EP stepping B
Form factor
ATX 30.5cm X 19cm
6 PCI - 0 ISA - 0 CNR - 1 AGP - 4 USB
Three 168-pin DIMM sockets, maximum size up to 512MB.
66Mhz to 200Mhz in steps of 1Mhz
Vcore adj.
1.050v to 1.825v in steps of 0.025v
Vio adj.
+5% ou +10%
Audio chipset
6 channel C-Media CM18738


The Iwill BD133u comes complete with a new set of audio circuits that are based on the C-Media CMI8738 chip. The CMI8738 supports 5.1 configuration, and up to 6 audio-out lines - including one central base channel.

Super Audio version of the Iwill BD133u permits users to treat SPDIF digital signals, using optical connectors and RCA in & out jacks.

From an audio standpoint, the C-Media CMI8738 leaves very little to be desired; it's capable of supporting 32 polyphonic voices, EAX effects, and is compatible with both Microsoft DirectSound 3D, and Aureal A3D.

With that said, we can't exactly compare this integrated board to an SBLive card, but its certainly a much sound solution than the audio abilities of most VIA and/or Intel chipsets.

Whatever the case though, we found the BD133u sound abilities to be excellent. Its quite capable of playing MP3s, CD sound-tracks, and 3D games with a surprising amount of depth and fidelity. The richness of the C-Media CMI8738's sound is pretty shocking, and will come as a pleasant surprise to many users.

As we mentioned earlier, the BD133u offers users a fair amount of latitude in the Overclocking arena.

For all intents & purposes, the BD133u is also a jumperless board; only one jumper exists that relates to the CPU, and that's used to adjust the Vio voltage. All other adjustments are performed from within the BIOS

To start off, the "Iwill Smart Settings" menu offers tweakers the ability to set the clock multiplier to between 4X and 12X in steps of 0.5X

The FSB frequency can also be adjusted, and set to between 66MHz and 200MHz in 1MHz increments - as indicated by the table above.

As expected, the Vcore voltage is also adjustable, and can be set as indicated in the table.

A number of settings relating to the memory bus can also by changed. The memory bus frequency itself, though, is set from within the "Iwill Smart Settings" menu. From there, the memory bus frequency can be set to 100MHz, 133MHz, or to SPD - which will allow the system to determine the setting automatically.

All other memory timing settings can be accessed through the traditional "Advanced Chipset Features" menu.


Suite: Technical details.