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Intel Core i7-5775C 3.3GHz Broadwell LGA-1150 CPU Performance Overview

Intel Core i7-5775C 3.3GHz Broadwell LGA-1150 CPU Performance Overview
We take a close look at Intel's Core i7-5775C 3.3GHz Broadwell processor. We tell you all about it and compare it against the Core i7-4790K.
By: Steven Bassiri | Intel CPUs in CPUs, Chipsets & SoCs | Posted: Jul 2, 2015 2:13 pm

Introduction

 

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Turn back the clock to November 2012. Outlook in the PC DIY community was grim, everyone was waiting in anticipation as rumors started to surface that the end of the socketed desktop CPU was growing near. Many thought that if Broadwell was to be BGA only, then all following CPUs would also be the same way. The community loudly protested this news, and Intel listened. The i7-5775C and 5675C aim to answer the call for a socket LGA1150 Broadwell CPU. To top things off, Intel decided to add its top of the line Iris Pro graphics to both SKUs.

 

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In my opinion, Broadwell was always a bit misunderstood. Intel realized that they needed to realign their assets to take greater advantage of the mobile market, and to do that they needed to start building more power efficient and mobile-friendly CPUs. It's one reason that Haswell and Broadwell both carry the integrated silicon voltage regulator, otherwise known as the fully integrated voltage regulator (FIVR). Broadwell is a perfect example of a CPU designed for the mobile segment and supercharged like a race car to fit into the desktop. Instead of increasing performance within the same thermal and power limits as the previous generation, Intel looked to increase power efficiency within the same performance envelope. In fact, low-powered Broadwell SKUs have been in mobile devices and SFF PCs for many months now, and it was only a month ago at Computex that Intel announced the SKUs pictured above.

 

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To help transition into smaller lithographic nodes, Intel has their Tick-Tock model where a Tock is a new microarchitecture and a Tick is basically a node shrink of the previous microarchitecture. Haswell was the Tock at 22nm and Broadwell is the Tick at 14nm. Broadwell is more than just your typical Tick; for starters it is the first time that Intel has put Iris Pro graphics and unlocked overclocking in the same package. The 5775C and 5675C also introduce 128MB of overclockable eDRAM, known as Crystal Well, working as L4 cache primarily for the integrated Iris Pro graphics.

 

As you can see, the die map reveals that Broadwell focuses heavily on the GPU side of things, allocating more die space and quicker memory access to integrated graphics. From what I have seen in my past reviews with SFF PCs using Broadwell, Intel has focused heavily on power reduction. The die shrinks and optimizations have led to greatly reduced power consumption without greatly impacting processing power. Let's see how Broadwell does on the desktop.

 

 

Specifications

 

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The 5775C and 5675C both work in the LGA1150 socket, but Intel recommends the Z97 chipset if you decide to overclock, especially if you want to use XMP. The 5775C has a base and turbo clock speed 200MHz lower than the 4770K and 3770K, but at the same time it carries significantly better integrated graphics and a lower TDP. The 5775C also has less shared cache at 6MB compared to 8MB, but it carries 128MB of eDRAM that operates at 1800MHz. You can start to see the mobile influence on Broadwell and how Intel modified and improved on other features to ready the 5775C for the desktop.

 

 

Pricing

 

Intel's suggested price for the i7-5775C is $377 while its counterpart, the i5-5675C, will cost $277. The 5675C has 2MB less cache and no hyper threading when compared to the 5775C. The 5775C is a little more expensive compared to Haswell offerings; the extra cost is presumably for the better integrated graphics.

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