Millennium G450 Specs
Although many of the specs of the G450 don't stray too far from the G400, there are some notable changes.
The G450's front side
Roll that die
The G450 has been built around a smaller die of 0.18 micron, instead of 0.25 micron. Similar to the
die-shrinking manufacturing that is done for processors, a die-shrink for the video chipset can yield several
benefits. Firstly, the G450 consumes less power, which correlates to the fact that the G450 does not run too
hot. In fact, the G450 has no fan; it only has a heatsink. Secondly, a 0.18 die process is a more efficient
manufacturing process in terms of how much material is used. Hopefully over the course of manufacturing thousands
and thousands of cards, this cost savings is passed along to the consumer's bottom line, which is how much the
G450 costs! Finally, the die-shrink allows Matrox to integrate quite a few new things onto the G450, that weren't
integrated features on the G400.
DDR = Dance Dance Revolution
Another feature that can be noted immediately is the memory on the card. The G450 has 32 MB of SDRAM. However,
the G450 is using DDR (double data rate) SDRAM instead of the SDR (single data rate) SDRAM that the G400 cards
were using. This is coupled with a reduction in the memory bus. The memory bus used to be 128-bit, but now has
been reduced to 64-bit. However, by using DDR SDRAM, the 64-bit memory bus should function as a 128-bit bus.
Here is a chart showcasing some of the key features:
|0.18 micron die|
|256-bit DualBus architecture|
|64-bit DDR/SDR external bus to frame buffer memory|
|Full AGP 4X with multi-threaded bus mastering|
|Support for AGP 1X, 2X, and 4X|
|Integrated second RAMDAC|
|Integrated TMDS transmitter|
|32MB 6ns DDR SDRAM|
|Hardware support for Environment Mapped Bump Mapping|
|Vibrant Color Quality2 (VCQ2) rendering|
|Matrox DualHead Display Technology|
|High speed primary 360MHz RAMDAC with UltraSharp RAMDAC technology|
|Primary display resolution up to 2048x1536x32-bit|
|Bilinear, trilinear, and anisotropic filtering|
|Symmetric Rendering Architecture|
|32-bit Z-buffer including 8-bit stencil buffer|
Matrox has a reputation for being tight-lipped about the clock speeds of their video cards. The G450 is no
exception. Using a variety of video utilities, it seems pretty likely that the core speed is running at 125 MHz.
This is the same as the G400 card, which is a bit surprising, considering that the core has not increased in speed.
We will have to verify this. Additionally, the Hyundai SDRAM on the card is rated at 6 ns. The math on the
nanosecond rating would indicate 166 MHz. Again, this is the same as the G400, but slower than the 5 ns rated
RAM on the G400 MAX, which was clocked at 200 MHz.