Intel Iris Pro Graphics P580 vs Intel HD Graphics 515
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 515► remove
The Intel HD Graphics 515 (GT2) is a low-end integrated graphics unit, which can be found in the Core m-series of the Skylake generation. This "GT2" version of the Skylake GPU offers 24 Execution Units (EUs) clocked at up to 1000 MHz (depending on the CPU model). Due to its lack of dedicated graphics memory or eDRAM cache, the HD 515 has to access the main memory (2x 64bit DDR3L-1600 / LPDDR3-1866).
According to Intel, the HD Graphics 515 is up to 41 percent faster than the previous HD Graphics 5300 (Broadwell). Nevertheless, the GPU will handle only simple games like Counter-Strike or Dota with decent frame rates. Depending on the specific CPU model, memory configuration and TDP (4.5 W, configurable), performance may vary substantially.
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 1.4a (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 HD Graphics 515 can be found in Core m processors with 4.5 W TDP (3.5/3.8 W cTDP down, 7 W cTDP up) and is therefore suited for very thin, mostly passively cooled 2-in-1 notebooks and tablets.
|Intel Iris Pro Graphics P580||Intel HD Graphics 515|
|Gen. 9 Series|
|Codename||Skylake GT4e||Skylake GT2|
|Architecture||Gen. 9 Skylake||Gen. 9 Skylake|
|Cores||72 - unified||24 - unified|
|Core||350 - 1100 (Boost) MHz||300 - 1000 (Boost) MHz|
|Bus||eDRAM + 64/128 Bit||64/128 Bit|
|Max. Memory||128 MB|
|DirectX||DirectX 12_1||DirectX 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|