Broadwell: Intel Core i7-5775C And i5-5675C Review


Operating at lower clock rates with less shared L3 cache and 65W TDPs, Intel’s two new socketed Broadwell-based CPUs clearly aren’t intended to usurp the existing enthusiast-oriented Haswell processors. Power users, breathe easy. That’s not what today’s launch is about. The real star of the show is Iris Pro Graphics 6200, which absolutely destroys anything Intel previously offered for its LGA 1150 interface (not to mention AMD’s best effort to make APUs look good).

In fact, if you were to summarize Broadwell on the desktop in one run-on line, it’d be that a 14nm manufacturing process gives Intel a distinct advantage, which manifests as four IA cores fast enough for desktop workloads and a significantly more complex graphics engine able to hang with many mainstream add-in cards, all crammed into a modest 65W TDP.

From there, you can get into the intricacies: the Broadwell architecture’s increased IPC throughput, a more than doubling of EUs on the graphics engine, major enhancements to the media processing pipeline, 128MB of L4 cache that no other LGA 1150 CPU has enjoyed and optimizations for power, which amplify Intel’s efficiency story. Could you imagine if the company had a version of its quad-core, GT3e-equipped die designed for an 84 or 88W TDP?

Given what we do have our hands on, though, most Tom’s Hardware readers are going to ask, “What’s the point?” Anyone with an LGA 1150 motherboard already has a Haswell-based processor, limiting the allure of an upgrade to Iris Pro Graphics 6200. But if you already have a desktop PC with Haswell inside, you probably have a discrete graphics card too, since HD Graphics 4600 is…well, modest by modern PC gaming standards. Those of you on an older platform would need not only the -5775C or -5675C, but also a new motherboard. You’ve waited this long—why not hang tight for a few months for Skylake and start anew with 100-series chipsets, DDR4 and the return of unlocked 95W K-series CPUs?

Even if the Core i5-5675C and Core i7-5775C aren’t particularly practical right now, we still have to commend Intel for listening. Two years ago, we asked for a socketed CPU sporting the company’s grand effort to showcase integrated graphics, preferably in an enthusiast-friendly configuration. These processors come close to what we envisioned. They’re just victims of unfortunate timing.

MORE: Best Gaming CPUs For The Money

Chris Angelini is a Technical Editor at Tom's Hardware. Follow him on Twitter, Facebook and Google+.

Igor Wallossek is a Senior Contributing Editor for Tom's Hardware Germany, covering CPUs and Graphics. Follow him on Twitter, Facebook and Google+.

Follow Tom's Hardware on Twitter, Facebook and Google+.

  • RNOblivion
    Proof read your articles. This seems to be an increasing prevalent theme of Tom's over the last couple years.
  • greghome
    are these numbers real?.............Not only does it match lower mid range cards, but it completely destorys AMD's APUs........
  • Nuckles_56
    With the Sandra 2015 benchmark on the first page, you are testing the i7 7557c against the i7 4790k instead of the i7 5775c
  • babernet_1
    Sad how AMD is absolutely shoved into the dust bin. I hope their upcoming Zen next year will be worthwhile with its 14nm process and more Intel-like cores.
  • wtfxxxgp
    This is exactly what I said to a buddy of mine about a month ago. Everyone is going on about how little Intel has done with CPUs over the past few years - presumably due to no real competition from AMD. Then people starting looking to Zen as being the real competitor for Intel and saying things like "Intel are in for a shock" - I had the view that Intel weren't resting on their laurels all this time - they've just been biding their time and doing amazing things in a hush hush manner. When Zen is released it will soon be completely obliterated by some of the tech that Intel would have been working on in the meantime - AMD has lagged too far behind for too long and love them or hate them, Intel is the benchmark when it comes to CPUs - period. They own this space, and these 2 chips have just rendered AMD APUs completely useless now. I'd be interested in this for a HTPC solution with some light gaming - League of Legends etc. This is impressive, however, like the article concluded, what a poor time for them to be released.
  • Grognak
    Wow. 93% better average framerate in GTA V than a 7850K with DDR3-2400 RAM... And that's just the i5. Incredible.
  • shrapnel_indie
    Since Broadwell is unlocked, would have been interesting to see how they overclocked. Yeah Skylake is breathing down the neck of Broadwell now thanks to the delays it suffered... but still would be fun to see.

    You’ve waited this long—why not hang tight for a few months for Skylake and start anew with 100-series chipsets, DDR4 and the return of unlocked 95W K-series CPUs?

    Last I heard Skylake was supposed to support DDR3 and DDR4. Was that just a rumor that wasn't the truth or will it actually support DDR3 as well?
  • alpha27
    heh iris coming close to a 750gtx 500 cuda core NVidia better watch out hey
    hmm if intel whacked a few iris's on a gfx chip and did there thing they could possibly beat NVidia...and make even more money lol, hmm mutli 128mb ring buses and iris core's and hbm...delicious
  • de5_Roy
    it's a good review. two big reviews back to back, nice job. :)

    i missed some things:
    unlocked broadwells but no o.c. not even a little look into how these overclock and behave o.c.ed.
    no comparison (gaming, power use, htpc etc.) with the desktop haswell i5 and i7 -R cpus' iris pro igpus. the amd comparisons were good though. i hope you guys test these against the haswell iris pro later.

    in some of the charts, the core i7 5775 was written as i7 7557.
    in the test setup page, system memory section, is it "transcend" instead of "transcent"?

    one last thing: do these unlocked broadwell cpus really have 16x gen 3.0 lanes off the processor? i thought these were soc dies (with southbridge disabled) with 8x gen 3.0 lanes.
  • SteelCity1981
    not surprising given that it has an irs pro gpu in it, that's intel top of the line gpu. now obv even with that said it's in no competition with highend gpus from NVidia or amd as any apu's gpu would get destroyed, but what's good is the fact that it's helping to push gpus on apu's to become better and better and since intel has greatly stepped up their game in the apu's gpu department i'd expect amd to step up their game even further and push back. I also see that since there is such a big gain with broadwells gpu, that skylake won't see any real jump in that department. i'd imagine that the irs 6000 series is going to carry over onto skylake with little improvement over broadwells irs 6200.