Intel Core i7-4790K vs Intel Core i7-5775C

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Core i7-4790K compared with Core i7-5775C

	IntelCore i7-4790K	IntelCore i7-5775C
Overview
Released
Released	June 2014	June 2015
Cores and clocks
Cores
Cores	4	4
Threads
Threads	8	8
Base clock
Base clock	4 GHz	3.3 GHz
Boost clock
Boost clock	4.4 GHz (better)	3.7 GHz
L3 cache
L3 cache	8 MB (better)	6 MB
Cores
Cores	Four cores with Hyper-Threading; Intel Turbo Boost 2.0 supported. The current maker page lists Transactional Synchronization Extensions as unsupported, superseding early review specifications.	Four cores with Hyper-Threading; Intel Turbo Boost 2.0 supported. CPU multiplier overclocking is confirmed by PC Gamer and PCWorld.
Clocks
Clocks	Maximum turbo is a single-core frequency; overclocking requires an appropriate motherboard and cooling. Intel publishes TDP without a separate maximum turbo-power figure.	Maximum turbo is a single-core frequency. Intel also publishes a 37 W configurable TDP-down mode at a 2.2 GHz base frequency. Intel's June 2015 driver notes describe the model as newly launched; Velocity Micro offered systems immediately in June, while PC Gamer reported delayed availability of separately boxed processors.
Graphics and AI
Built-in graphics
Built-in graphics	Yes	Yes
Graphics
Graphics	Intel HD Graphics 4600; 20 execution units; 350 MHz base, up to 1.25 GHz; three displays; Quick Sync Video. HDMI up to 3840×2160 at 24 Hz; DisplayPort and eDP up to 3840×2160 at 60 Hz; VGA up to 1920×1200 at 60 Hz.	Intel Iris Pro Graphics 6200; 300 MHz base, up to 1.15 GHz; 128 MB eDRAM; three displays; Quick Sync Video. DisplayPort up to 3840×2160 at 60 Hz; HDMI up to 4096×2304 at 24 Hz.
Platform
Socket
Socket	LGA1150	LGA1150
Base power
Base power	88 W	65 W
Unlocked
Unlocked	Yes	Yes
Memory support
Memory support	Up to 32 GB; two channels; DDR3-1333/1600 or DDR3L-1333/1600 at 1.5 V, as listed by Intel; 25.6 GB/s maximum bandwidth; ECC not supported.	Up to 32 GB; two channels; DDR3L-1333/1600 at 1.5 V, as Intel specifies; 25.6 GB/s maximum bandwidth; ECC not supported.
PCIe
PCIe	PCIe 3.0; 16 CPU lanes, configured as 1×16, 2×8 or 1×8+2×4.	PCIe 3.0; 16 CPU lanes, configured as 1×16, 2×8 or 1×8+2×4.
Process
Process	22 nm; Devil's Canyon, a Haswell refresh; 37.5 × 37.5 mm package; 74.04°C Tcase limit, not a junction-temperature limit. New polymer thermal interface and additional capacitors, described in Intel's Computex launch coverage and the exact-model reviews.	14 nm; Broadwell; 37.5 × 37.5 mm package.
Cooler
Cooler	Intel lists both ordinary boxed and explicitly fanless boxed SKUs; cooler contents should be checked for the particular package. Compatible Intel 8- and 9-series chipsets require the appropriate motherboard BIOS. Intel's June 2014 fact sheet confirms volume availability that month; the announcement itself is not used as the on-sale day.	LGA1150 motherboard support depends on the board and BIOS. PC Gamer's firmware difficulties concern its early engineering sample and do not establish a fault in every retail processor.