In late 2002, there was an attempt to form a fourth family, also for the laptop market, the only member of it being the GeForce4 4200 Go (NV28M) which was derived from the Ti line.

Although the 4200 was initially supposed to be part of the launch of the GeForce4 line, Nvidia had delayed its release to sell off the soon-to-be discontinued GeForce 3 Ti500 chips.

[7] Furthermore, some graphics card makers simply ignored Nvidia's guidelines for the Ti4200, and set the memory speed at 250 MHz on the 128 MiB models anyway.

It outperformed the Mobility Radeon 9000 by a large margin, as well as being Nvidia's first DirectX 8 laptop graphics solution.

[1] Nvidia, however, missed a chance to dominate the upper-range/performance segment by delaying the release of the Ti4200 and by not rolling out 128 MiB models quickly enough; otherwise the Ti4200 was cheaper and faster than the previous top-line GeForce 3 Ti500 and Radeon 8500.

[13] Besides the late introduction of the Ti4200, the limited release 128 MiB models of the GeForce 3 Ti200 proved unimpressive, letting the Radeon 8500LE and even the full 8500 dominated the upper-range performance for a while.

Debuting at half the cost of the 4600 (US$199 versus US$399), the 4200 remained the best balance between price and performance until the launch of the short-lived DirectX 9 ATI Radeon 9500 Pro at the end of 2002.

It also owed some of its design heritage to Nvidia's high-end CAD products, and in performance-critical non-game applications it was remarkably effective.

The most notable example is AutoCAD, in which the GeForce4 MX returned results within a single-digit percentage of GeForce4 Ti cards several times the price.

It was also the first GeForce to offer hardware-iDCT and VLC (variable length code) decoding, making VPE a major upgrade from Nvidia's previous HDVP.

The MX440 performed reasonably well for its intended audience, outperforming its closest competitor, the ATI Radeon 7500, as well as the discontinued GeForce2 Ti.

Priced about 30% above the GeForce2 MX, it provided better performance, the ability to play a number of popular games that the GeForce2 could not run well—above all else—to the average non-specialist it sounded as if it were a "real" GeForce4—i.e., a GeForce4 Ti.

While John Carmack initially warned gamers not to purchase the GeForce 4 MX440, its somewhat widespread adoption compelled id Software to make it the only DirectX 7.0 GPU supported by Doom 3.

ATI's move in turn compelled Nvidia to roll out the Ti4200 earlier than planned, also at a similar price to the MX 460, and soon afterwards discontinuing the Ti200.

The Ti200, 8500LE, and Ti4200 were all DirectX 8.0 compliant while having similar market pricing to the MX460, while the 8500LE and Ti4200 also provided significantly better performance than the MX460, prevented the MX460 from ever being popular compared to the other GeForce 4 MX releases.

The two new models were the MX440-8X, which was clocked slightly faster than the original MX440, and the MX440SE, which had a narrower memory bus, and was intended as a replacement of sorts for the MX420.

In spite of its new codename (NV19), the PCX 4300 was in fact simply an NV18 core with a BR02 chip bridging the NV18's native AGP interface with the PCI-Express bus.