Intel Iris Pro Graphics P580 vs Intel HD Graphics 505
Intel Iris Pro Graphics P580► remove
The Intel Iris Pro Graphics P580 (GT4e) is an integrated professional graphics unit of the Skylake generation (top version). As successors of the Iris Graphics 6200 (Broadwell), the Iris P580 can be found in some high-end Xeon quad core CPUs and offers 128 MB of dedicated eDRAM memory. Furthermore, the so-called GT4e-version features 72 Execution Units (EUs). Besides the eDRAM cache, the Iris 580 is able to access the main memory (2x 64bit DDR3L-1600 / DDR4-2133).
Compared to the consumer Iris Pro Graphics 580, the P580 is only included in the Xeon processors and intended for professional applications (certified drivers?) similar to the Quadro and Fire Pro lines.
Compared to the Iris Graphics 550 (28 W GT3e), the Iris Pro Graphics P580 offers more EUs (72 vs. 48) and a larger eDRAM Cache (128 vs. 64 MB).
The exact performance of the Iris Graphics P580 depends on memory configuration and CPU model (different clock speeds). However, it should be clearly faster than the old Broadwell Iris Pro 6200 and may compete with a dedicated GeForce 945M. Modern games of 2015/2016 should be playable in medium settings.
The revised video engine now decodes H.265/HEVC completely in hardware and thereby much more efficiently than before. Displays can be connected via DP 1.2 / eDP 1.3 (max. 3840 x 2160 @ 60 Hz), whereas HDMI is limited to the older version 1.4 (max. 3840 x 2160 @ 30 Hz). However, HDMI 2.0 can be added using a DisplayPort converter. Up to three displays can be controlled simultaneously.
The Iris Graphics P580 can be found in some mobile high-end quad core processors (45 W). Therefore, they are most likely not used in thin and light laptops.
Intel HD Graphics 505► remove
The Intel HD Graphics 505 is an integrated processor graphics unit from the Apollo Lake generation (e. g. Pentium N4200), which was announced mid 2016. The GPU can convince with low consumption figures, but the performance is only in the low-end segment and is rarely sufficient for modern games. Being the maximum configuration of the Apollo Lake GPU, the HD Graphics 505 is equipped with 18 Execution Units (EUs) running at up to 750 MHz. The technical specifications of the GPU are based on Intel's Gen9 architecture, which is also used for the more expensive Skylake series.
Due to its lack of dedicated graphics memory or eDRAM cache, the HD 505 has to access the main memory via processor (2x 64bit DDR3L-/LPDDR3-1866, LPDDR4-2400).
The HD Graphics 505 should be slightly slower than the older Core-M GPU HD Graphics 5300, so modern games (as of 2016) will rarely run smoothly even at the lowest settings.
The revised video engine now decodes H.265/HEVC completely in hardware and thereby much more efficiently than before. Up to three displays can be connected via DP/eDP or HDMI (4K probably only at 30 Hz via HDMI 1.4).
The TDP of the whole Pentium N4200 chip is 6 Watts by default, so the GPU is primarily used for (often passively cooled) netbooks or thin notebooks. The TDP can also be reduced to 4 Watts, but this will obviously affect the performance.
|Intel Iris Pro Graphics P580||Intel HD Graphics 505|
|Gen. 9 Series|
|Codename||Skylake GT4e||Apollo Lake|
|Architecture||Intel Gen. 9 (Skylake)||Intel Gen. 9 (Apollo Lake)|
|72 -||18 -|
|Core||350 - 1100 (Boost) MHz||300 - 750 (Boost) MHz|
|Bus||eDRAM + 64/128 Bit||64/128 Bit|
|Memory||eDRAM||(LP)DDR3(L) / LPDDR4|
|Max. Memory||128 MB|
|DirectX||DirectX 12 (FL 12_1)||DirectX 12 (FL 12_1)|
|Technology||14 nm||14 nm|
|CPU||GPU Base Speed||GPU Boost / Turbo|
|Intel Xeon E3-1575M v5||4 x 3000 MHz, 45 W||350 MHz||1100 MHz|