Core i7 5775C processor review: Desktop Broadwell
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Undying
HH, is it possible that you got worse sample yet? That overclock is just so bad. First overclock on 5775c (a month ago) showed it can reach 5Ghz at 1.4v+.
And people thought they'll upgrade from Haswell to Broadwell, lol.
Ryu5uzaku
Broadwell is like moot point if you got even Ivy bridge unless you really really want 14nm -.- Mine clocks to 4.8 :<
At least Intel upped their IGP game. I want to see if AMD has done anything in the past year for their IGP. Since this new iris is barely faster then 7850 on that field, else it is way faster ofc 😀
Great review as always.
Hilbert Hagedoorn
Administrator
No I checked with some other media, and most of us all reach this level of OC.
MasterBash
I dont understand the power consumption. 4770k is 2w more @ 3.5ghz vs broadwell at 3.3ghz. 4790k @ 109w and it runs at 4.0ghz .
14nm doesnt seem to help much... or at all. Unless the other processors were tested with more power efficient hardware, but I doubt it.
I am guessing stock voltage is higher to be able to get stable clocks at default? Then that would defeat the purpose of the power saving of 14nm. Other than that I cant figure out why that would happen. Considering there is a dedicated gpu, its definitely not caused by the iGPU.
The very slight per core performance boost isnt worth it. Its basically haswell with a better iGPU.
Disappointed in 14nm atm.
Turanis
Great review.
But yep this new cpus not worth it.Next year will be better. 🙂
They push the Iris Pro 6k but the cpu has only 6mb smart cache.hmm
Compare Intel® Products
southamptonfc
It's really hard to see the point of this CPU. It's more expensive, slower than the previous generation 4790K, it doesn't overclock as well either.
It's like Intel thought "Well we've produced loads of these, might as well try and sell them". Surely deviating from the normal naming convention is an admission that these are really oddball CPUs.
Toss3
Hmm did you just alter the core voltage and multiplier? If so you really should increase the vccin and limit the cache to 4Ghz. A lot of people were stuck on haswell overclocking because they were trying to stick with the recommended 1:1 ratio, which doesn't really matter and only limits your max oc. Got 4.6 stable easily after actually putting some effort into it (was stuck on 4.3Ghz before and my system refused to boot at 4.6 at any voltage).
XpoLon
It's not slower. Clock for clock Broadwell is up to 7-8% ahead. There are plenty of reviews out there - go and check them out.
Here for example:
tweaktown.com/articles/7222/intel-core-i7-5775c-3ghz-broadwell-lga-1150-cpu-performance-overview/index7.html
maximumpc.com/intel-broadwell-dt-core-i7-5775c-review/
techspot.com/review/1028-intel-core-i7-5775c-broadwell/page10.html
p.p. Stupid that all of the reviewers are overclocking with ES, not retail, that could be better or worse in that regard.
Hilbert Hagedoorn
Administrator
Yep, VCCIN configured up-to 1.950V at one point. Did not make a difference.
Solfaur
As expected, nothing special. As many said before, performance wise anything from 2600K on at +4GHz is pretty damn solid, at least in games. I'd still be on my 3770K if my old mobo wouldn't have died on me, so yeah... I'm looking forward to the day when we'll see massive performance gains again, but that won't happen if AMD (or maybe another company?) won't step up their game. Maybe DX12 and Windows 10 will change things up a bit, we'll see. 🙂
Raider0001
I hope they make like i5 5430K for 150 bucks, that would be my goal, to start over-clocking cheap silicon again...
schmidtbag
For someone buying a brand new PC, doesn't intend to overclock, and has something older than a Sandy Bridge system, this isn't a bad option. It's power efficiency is what stands out the most, in my opinion.
On the note of the IGP, yeah, it might be better than an A10, but the i7 is also much more expensive and it wouldn't surprise me if the A10's memory controller and CPU is a bottleneck. Seriously AMD needs to get going on triple or quad channel memory - the IGP is starving for more bandwidth.
Fox2232
Question is if going out of sync does not reduce efficiency.
One should be sure that higher clock bring proportionally higher performance.
kinggavin
for me right now this cpu and the 4790k are waste of money there so close in price to a 5820k 6 core you might aswell just go x99 because its gonna cost u around the same and u get a 6 core cpu, and for a gaming pc we need see after batman arkham knight how much effort these developers will put in pc ports , and windows 10 will you need a lot of cpu cores, will overclocking a cpu make any difference in games i think wait see what happen with the new software win 10 and dx12 before upgrade any cpu
icedman
Im not too impressed even with the die shrink its only about 11w less power then my ancient 3770k. O well i still hardly even max out what i got im more worried about how long my mobo will last.
vbetts
Moderator
The iGPU is strong in this refresh. Faster IPC performance compared to Godavari, faster iGPU as well, and uses less power. Now they just need to bring the cost down.
Overall, that part of it is amazing. My Alpha is LGA 1150, and hopefully I can pop one of these guys in!
Pleiades
Well since they put in near zero for Batman, it seems anything would be an improvement LOL 🙂
bemaniac
My 4930k was more of a 2nd hand bargain than I thought. It might not be bettered by 20% or more in games only for 3 more years lol
0blivious
This isn't meant to be the successor to the 4790K, is it? I presume not as the base clock is so much lower. Anyways, the performance is impressive compared to my stock 4790K considering the frequency difference.
These clearly aren't particularly good upgrades for anyone on Sandy Bridge or newer but for someone looking to build a new rig, they would do nicely. The overclocking seems to be getting weaker with each new i7 they release though.
Great review.
XpoLon
No. It's different high-level roadmap. See here:
http://i.imgur.com/1sr13ML.jpg
As you can see - 5775C continues it's journey through 2016 till it's replaced by 6775C (?? Skylake equivalent). At this time - 4790K is already "dead".
Overclock it's not weaker. From 3.3 to 4.2/3 is like 900 to 1000MHz. Average 4790K overclocks to 4.8GHz which is 800MHz "only". Also on that speed Haswell is boiling water.
Also DX12 will give you to use iGPU + DGPU. So Broadwell will kick ass in gaming!
