Intel Broadwell Thread

[frozentundra123456]

The use case for this? Places where the iGPU is both good enough and attractive. So maybe legitimate small gaming machines if it works, and very likely Apple as they really like iGPU's for the iMacs/mini's etc.

There's enough power budget here that were they using something as efficient as say Maxwell it'd be hitting 750ti ish levels on their 14nm process.

Apple, sure I can see that. Otherwise, I dont know. It depends on the performance of the igpu and the price of the chip. Now if the performance of the igpu is significantly better than Kaveri, sure one might be willing to pay the "intel tax". But the more I look at the APU tests on game.gpu, the more I think it will be lucky to be even equal to Kaveri at a much higher price. Even if you double HD4600 performance, you would not have a clear lead over A10 7850K except in a few cpu limited games.

Now if they wanted to really stick it to AMD, they could price it at Kaveri levels and have a much better cpu and probably equal igpu. But we all know there is no way that will happen, since the normal quads are more expensive already than Kaveri. If the price were right, it would be ideal for steamboxes too.

 

[Sweepr]

It will be interesting to see where Broadwell GT3e and Skylake GT2/GT4e will end up relative to the competition in terms of graphics performance. According to the latest roamaps AMD APUs will not get HBM neither Zen cores next year so it's almost a given that Intel will be more competitive by then than it currently is with their Haswell GT2 LGA solutions, while retaining their CPU performance advantage.

 

[DrMrLordX]

For what it's worth, I think the i7-5775C is an exciting product. It may be Intel's first iGPU that is decisively more powerful than AMD's offerings. Also, I'm not sure how good OpenCL 2.0 is for sharing memory space between GPUs and CPUs, but if the interface is useable and the results are there, Intel could just lean on Khronos for a way to leverage GT3e for compute functions with the existing OpenCL paradigm as a partial alternative to HSA.

I don't know enough about Gen8 graphics to understand whether or not Gen8 is really capable of sharing memory space the same way integrated GCN cores can do it.

 

[Dave2150]

I'm surprised we still don't have Broadwell-C available for desktop.

We're approaching mid may - with Skylake due in July, August, you'd have thought these would have launched by now.

Isn't there going to be a Skylake LGA1151 CPU with Iris Pro available too? If that launches with the rest of Skylake, Broadwell-C will have a ridiculously short shelf life.

 

[DrMrLordX]

Skylake Iris Pro won't show up until 2016, probably. It won't be in the first launch for Skylake in 2015.

 

[ShintaiDK]

I'm surprised we still don't have Broadwell-C available for desktop.

We're approaching mid may - with Skylake due in July, August, you'd have thought these would have launched by now.

Isn't there going to be a Skylake LGA1151 CPU with Iris Pro available too? If that launches with the rest of Skylake, Broadwell-C will have a ridiculously short shelf life.

And Skylake is august 15th, not july.

 

[Sweepr]

Intel Core i7-5775C ‘Broadwell’ overclocked to 5GHz with air cooling

Intel will shortly launch its new Broadwell line of CPUs, which are compatible with LGA1150 socket and based on 14nm manufacturing process. The launch seems to be imminent and the guys from HKEPC, and the well known overclocker Lam, already have a working sample and have published a couple of benchmark results.

The screenshot and images from the official Facebook page unfortunately do not show much, but we are already able to understand that the used motherboard for testing is ASRock's Z97 OC Formula, which is also compatible with Haswell and Haswell Refresh CPUs. The screenshot also shows a short test of wPrime 32M where the Core i7-5775C managed to score approximately 4.4 seconds at a frequency of 4800 MHz.

We quickly checked the result at HWBOT and we can see that the Core i7-4790K at similar clock is about half a second slower. Unfortunately, we do not have any details regarding the memory settings so this comparison may not be totally correct. We will definitely keep our eyes for more scores as these should show up pretty soon.

A Chinese overclocker has managed to obtain an engineering sample of Intel Corp.’s Core i7-5775C central processing unit and overclock it to rather whopping 5GHz frequency using an air cooler. As it turns out, Intel’s “Broadwell Unlocked” chips can run at rather high clock-rates.

Albertfu, a PC enthusiast from China, overclocked his Intel Core i7-5775C from default 3.30GHz to 4.80GHz first and passed the SuperPi 32M test in 4.399 seconds, which is a solid result. He then pushed the chip further to 5.0GHz with rather massive 1.419V core voltage and the system was stable enough to boot Windows and take a CPU-Z screenshot. At that frequency, the computer was not truly stable, according to Albertfu.

The overclocker used an Asrock Z97 OC Formula motherboard as well as Gelid GX-7 cooler for his experiments. It is highly likely that professionals with liquid nitrogen will manage to boost the Core i7-5775C to well over 5GHz, but do not expect the chip to break that milestone inside regular PCs even with highly-sophisticated liquid cooling solutions.

www.ocaholic.ch/modules/news/article.php?storyid=12431
www.kitguru.net/components/cpu/anto...oadwell-overclocked-to-5ghz-with-air-cooling/

Not bad at all considering it's a 65W TDP chip with a massive GT3e iGPU. I've played with Haswell systems that wouldn't boot at 4.8GHz, let alone 5GHz. Honestly wasn't expecting it to reach Devil's Canyon OC potential, bodes well for Skylake-S later this year.

If Broadwell-K can deliver +4.5GHz without fancy cooling then it's going to be a valid upgrade option for LGA1150 users. It should confortably outperform Haswell at the same clocks thanks to a ~5% IPC boost and the huge eDRAM acting as cache.

 

[crashtech]

Interesting, hopefully that is not too cherry-picked of a sample.

 

[frozentundra123456]

Intel Core i7-5775C ‘Broadwell’ overclocked to 5GHz with air cooling



www.ocaholic.ch/modules/news/article.php?storyid=12431
www.kitguru.net/components/cpu/anto...oadwell-overclocked-to-5ghz-with-air-cooling/

Not bad at all considering it's a 65W TDP chip with a massive GT3e iGPU. I've played with Haswell systems that wouldn't boot at 4.8GHz, let alone 5GHz. Honestly wasn't expecting it to reach Devil's Canyon OC potential, bodes well for Skylake-S later this year.

If Broadwell-K can deliver +4.5GHz without fancy cooling then it's going to be a valid upgrade option for LGA1150 users. It should confortably outperform Haswell at the same clocks thanks to a ~5% IPC boost and the huge eDRAM acting as cache.

Depends on how much difference the e-dram makes I guess. I cant imagine it will be enough to justify an upgrade from Haswell, except perhaps in isolated applications.

Only place I see this chip having much appeal is for a small brix like gaming box where one is willing to pay the price for the igpu performance. Will be interesting to see how the igp performance stacks up against Kaveri. If all you want is igp though, Kaveri will be much cheaper, and I expect similar igpu performance, although BW will slaughter it in cpu performance. It might make an ideal SteamBox if the price were cheaper. Just make the damn edram standard in quad mobile, that is where it is needed, since you cant add a discrete card easily.

 

[jpiniero]

Depends on how much difference the e-dram makes I guess. I cant imagine it will be enough to justify an upgrade from Haswell, except perhaps in isolated applications.

Well neither is Skylake really. Or Skylake Refresh. Or After Cannonlake... maybe 8 core Broadwell-E or Skylake-E.

 

[crashtech]

Actually, This kind of CPU has interested me ever since we heard of Haswell with Iris Pro, though at that time the eDRAM die was too big to fit onto a 1150 socket. I was actually considering an A10 for a particular application but the CPU portion would have actually been a performance regression from the Sandy Bridge it was to replace. This might do nicely, though I'm sure at quite the price premium.

 

[Dave2150]

Intel Core i7-5775C ‘Broadwell’ overclocked to 5GHz with air cooling

www.ocaholic.ch/modules/news/article.php?storyid=12431
www.kitguru.net/components/cpu/anto...oadwell-overclocked-to-5ghz-with-air-cooling/

Not bad at all considering it's a 65W TDP chip with a massive GT3e iGPU. I've played with Haswell systems that wouldn't boot at 4.8GHz, let alone 5GHz. Honestly wasn't expecting it to reach Devil's Canyon OC potential, bodes well for Skylake-S later this year.

If Broadwell-K can deliver +4.5GHz without fancy cooling then it's going to be a valid upgrade option for LGA1150 users. It should confortably outperform Haswell at the same clocks thanks to a ~5% IPC boost and the huge eDRAM acting as cache.

It wasn't stable at 5Ghz, he was only able to take the screenshot.

Also remember this was a suicide run at 1.419V - most 4790k's also boot into windows @5Ghz at that kind of voltage.

 

[Sweepr]

It wasn't stable at 5Ghz, he was only able to take the screenshot.

Also remember this was a suicide run at 1.419V - most 4790k's also boot into windows @5Ghz at that kind of voltage.

It doesn't need to be. If it's 24/7 stable at 4.5GHz then it should match 4.75-5.0GHz Haswell due to architectural improvement + eDRAM/L4. Most of the Haswell builds I touched wouldn't go to 5GHz stable on air.

Some people might choose Core i7 5775C instead of Devil's Canyon as a replacement for older Pentium and Core i3/i5 LGA1150 parts if there's reasonable OCing potential.

 

[Fjodor2001]

And Skylake is august 15th, not july.

That specific now? 😱 Any source I've missed?

 

[Arachnotronic]

that specific now? 😱 any source i've missed?

It's the date that IDF 2015 begins, IIRC.

 

[jpiniero]

Some people might choose Core i7 5775C instead of Devil's Canyon as a replacement for older Pentium and Core i3/i5 LGA1150 parts if there's reasonable OCing potential.

Should point out that Broadwell-C is going to cost more than DC does. How much to be determined of course, might be $30-50. It would make sense if you bought the Pentium AA, but of course you would have been just better off buying DC in the first place.

 

[Dufus]

Albertfu, a PC enthusiast from China, overclocked his Intel Core i7-5775C from default 3.30GHz to 4.80GHz first and passed the SuperPi 32M test in 4.399 seconds, which is a solid result.

Someone should tell Kit that was Wprime 32M, not SuperPi 32M.

A nice result for 32M, wonder what the temps would be like on 1024M.

 

[DrMrLordX]

Dunno man, that's pretty sweet. 4.8 ghz on air? Even getting 4.5-4.6 out of the 5775C is unexpected. That plus the iGPU and eDRAM? How could you not want that over the 4790k? Now, if you're waiting for Skylake, that's one thing, but . . .

 

[TechyGeek]

Dunno man, that's pretty sweet. 4.8 ghz on air? Even getting 4.5-4.6 out of the 5775C is unexpected. That plus the iGPU and eDRAM? How could you not want that over the 4790k? Now, if you're waiting for Skylake, that's one thing, but . . .

Folks, not sure how relevant the eDram L4 cache is but in the article below, going from 1mb to 4mb cache gives you 5% bump in select apps.

http://www.tomshardware.com/reviews/cache-size-matter,1709-8.html

With that in mind, I guess it's a matter of which chip OC's better?

Let me know if you disagree.

 

[AtenRa]

If the price is reasonable, I really like to include one of those in my APUWars review.

 

[DrMrLordX]

Folks, not sure how relevant the eDram L4 cache is but in the article below, going from 1mb to 4mb cache gives you 5% bump in select apps.

http://www.tomshardware.com/reviews/cache-size-matter,1709-8.html

With that in mind, I guess it's a matter of which chip OC's better?

Let me know if you disagree.

It's hard to take that article's findings into account. You are comparing the L4 on Broadwell-C to L2 on Conroe. L2 is faster and, therefore, should have a much greater impact on performance than L4. Also, Conroe had the memory controller off-die so cache was arguably even more important back then. Then there are the architectural differences that have accumulated over the past 9 years . . .

I think the main things to take into account are:

Broadwell has a ~5% IPC advantage over Haswell at the same clockspeed
i7-5775C has extra cache, which isn't gonna hurt things (usually doesn't on Intel chips)
Looks like the i7-5775C will OC about as well as the 4790k

So it looks to me like you've got 5-10% better performance out of the i7-5775C and you get a beefy iGPU thrown in to boot. If that Gen8 Gt3e supports all OpenCL2.0 features in hardware then you could see some awesome hybrid CPU/GPGPU stuff out of that chip. HD4600 will never get you that.

If the price is reasonable, I really like to include one of those in my APUWars review.

Please do. They'll probably run like $360 at launch though.

 

[AtenRa]

Please do. They'll probably run like $360 at launch though.

If that is the price i will certainly will not, but i was thinking about the Core i5, i hope it will be the same as Haswell.

 

[Dufus]

Even getting 4.5-4.6 out of the 5775C is unexpected.

Not so much unexpected I think. Even an overclocked i7-4700MQ with 47W TDP can reach that although thermals are a big problem. Still seem to be stuck with the 4.5GHz-5GHz range for normal OC's, hopefully that will change in SKL or CNL.

 

[DrMrLordX]

Yeah, but this is the 14nm process which hasn't shown up at any clockspeed above, what, 3 ghz yet? Also the lower turbo speed vs the i7-4770R had people scratching their heads.

I was expecting 4.2-4.4 ghz max.

 

[ShintaiDK]

Yeah, but this is the 14nm process which hasn't shown up at any clockspeed above, what, 3 ghz yet? Also the lower turbo speed vs the i7-4770R had people scratching their heads.

I was expecting 4.2-4.4 ghz max.

Plenty of Broadwells above 3Ghz..