Skip to content
【☢】 ▷ Hardware, Reviews, News, Tutorials, Help post

technical specifications of these GPUs

The battle between AMD and NVIDIA continues, this time with the former’s commitment to the lower-middle range, that of gaming graphics cards around $ 300 with their AMD Radeon RX 6600 (XT), of which they have been able to know new details.

Navi 23, the GPU of the AMD Radeon RX 6600 (XT)

The information comes to us from Igor’s Lab and comes complete with details, which indicates that the launch of the AMD RX 6600 XT would not be a matter of months, but rather weeks, since the AMD RX 6600 XT has already been finished.

As you may already know by now, the AMD Radeon RX 6600 XT is based on a new GPU from the RDNA 2 family or also known as Navi 2x, specifically the Navi 23 model. Whose measurements are of the chip are 16.51mm by 14.28mm, making a total chip area of ​​235.76mm². All assembled on a 35 x 35mm socket in total and with the GPU turned 45º in it.

Regarding the desktop models, AMD will launch two graphics cards based on Navi 23, which are the AMD Radeon RX 6600 and the RX 6600 XT. The only differences between the two being the following:

  • ANDThe 6600 XT has all 32 Compute Units active, while the 6600 has 4 of them inactive, making a total of 28.
  • Boost speed is 2.6 GHz for the 6600 XT and 2.7 GHz in the case of the 6600.
  • The TDP, in the absence of your final confirmation, it would be 100 W for the 6600 XT and 100 W for the 6600. We do not know if this is an error on the part of Igor’s Lab or is due to the higher clock speed.

VRAM configuration

Variable speed VRAM

Both models will use GDDR6 memory at 16 Gbps on a 128-bit bus. Which translates into a bandwidth of 256 GB / s, half that of the AMD Radeon RX 6800 (XT) and RX 6900 XT. Interestingly, the AMD Radeon RX 6600 XT has a configuration that is just half that of the AMD RX 6800. In the sense of half the bandwidth, Compute Units and amount of VRAM.

Also for laptops


While high-end GPUs have problems due to their high consumption of being transferred as is for laptops, it is not the problem of low-mid-range ones, and in the same way that NVIDIA uses the same GA106 chip for the RTX 3060 Mobile and for desktop, AMD will do the same for its Navi 23 GPU.

So the AMD Radeon RX 6000 Mobile could debut with Navi 23-based GPUs, but this time We would have three variants according to the TGP of each one: 65 W, 85 W and 90 W. Where the differences would be the clock speed, but we do not know which variants correspond to the version with 28 Compute Units and which ones to the version with 32 Compute Units.

We do not know the VRAM configuration of the portable models, since it could well be a little slower and use GDDR6 memory at 14 Gbps or even 12 Gbps. At the same time that we could find models with 4 GB of VRAM and not 8 GB.

Other details of the AMD RX 6600 (XT)

RX 6600 XT PCIe

The first of the details is that the graphics card uses the PCI Express bus with 8 lines instead of 16. Which also indicates that it is a design not only intended for laptops, but also for mini-ITX towers. Are we going to see an AMD RX 6600 (XT) with a reduced form factor? Let’s not forget that AMD at CES teased it on a slide, so it is possible that we will see a model of reduced size.

RX 6600 Display

As for its accelerators, we have on the one hand that its hardware video codec will be capable of encoding and decoding VP9, ​​H.264 and HEVC, although only decoding AV1. If we go to its screen controller, both graphics cards will come with 5 video outputs of the DisplayPort 1.4a type with the option of adding a USB-C Alt-DP port if the manufacturer wants. Also an HDMI 2.1 port and another SL-DVI.

RX 6600 Thermal Sensor

The third novelty would be in the temperature monitoring, since a new temperature sensor has been integrated within the GPU itself. Which can control the fans of the graphics card via PWM, a limit temperature can be defined to protect the chip and can provide the temperature data to the software directly or through an SMBus port.