Industry sources revealed to TechPowerUp some pretty interesting specifications of AMD's two upcoming GPUs based on the 4th generation Graphics CoreNext "Polaris" architecture. The company is preparing a performance-segment GPU and a mainstream one. It turns out, that the performance-segment chip, which the press has been referring to as "Ellesmere," could feature 32 compute units (CUs), and not the previously thought 40.

Assuming that each CU continues to consist of 64 stream processors (SP), you're looking at an SP count of 2,048. What's more, this chip is said to offer a single-precision floating point performance of 5.5 TFLOP/s, as claimed by AMD. To put this into perspective, the company had claimed 5.2 TFLOP/s for the "Hawaii"/"Grenada" based FirePro W9100, which launched earlier this February, and that SKU featured all 2,816 SP present on the chip. So this chip is definitely faster than most "Hawaii" based SKUs.

HIS rolled out a new low-power Radeon R7 360 graphics card. The R7 360 Green iCooler OC, comes with TDP of 50W, compared to AMD's own specs that rate it at 100W. The card relies on the PCIe bus for entirely for its power, and uses high-grade VRM components that are more energy-efficient than the ones found on most R7 360 cards. That's not all, HIS is also throwing in a tiny OC - 1070 MHz core (vs. 1050 MHz reference). The card's 2 GB of GDDR5 memory over a 128-bit memory bus ticks at 6.00 GHz (GDDR5-effective). Based on the 28 nm "Tobago" silicon, the R7 360 packs 768 stream processors. In Europe, you can expect the HIS R7 360 Green iCooler OC to be priced at 99.90€ (including all taxes).

It looks like AMD's desktop discrete GPU lineup for 2015 will see a mix of rebrands, re-codename, and one big new chip, all making up the new Radeon R7 300 and R9 300 series. Cards based in this lineup should begin rolling out this month. Leaks from OEMs such as this one, suggest that the first of these should begin rolling out as early as June 16.

The spread is pretty cut and dry. "Hawaii," the chip driving the R9 290 series, will not only get a new codename as "Grenada," but also a seamless rebrand to the R9 390 series, with Grenada Pro making up the R9 390, and Grenada XT making up the R9 390X. One possibility could be AMD taking advantage of low 4 Gbit GDDR5 chip prices to cram 8 GB of standard memory amount, across Grenada's 512-bit wide memory interface. The R9 390X will compete with the GeForce GTX 970, while the R9 390 will offer an option in the vast price and performance gorge between the GTX 960 and GTX 970.