broadwell Have anyone ever heard of i7-5775C?

[maxtch]

When I bought my current desktop daily driver my plan was to upgrade it to i7-5775C after its release as Broadwell was on the verge, and use an E3-1231v3 in the interim. I specified the H97 chipset for my platform as I want Broadwell compatibility. My supplier cannot source any H97 mobo and upgraded it to a Z97 for me. Hence overclocking came back in the scope for me, and I am running my E3-1231v3 with a 3% BCLK overclock.

 

Broadwell delayed, and it seem to me that this upgrade path is kaput. Now what is my upgrade path? Keep hunting for the elusive i7-5775C, grabbing the i7-4790K and OC the crap out of it, or stick with my interim plan of E3-1231v3 with 3% BCLK overclock as long term plan and call it a day?

[aisle9]

The 5775C is a glorified APU. You can safely skip it. A 4790K is your best bet for a Haswell upgrade from that beautiful Xeon, but you may not see enough improvement to justify the price.

[Aniallation]

Aren't the 5xxxC chips the desktop Broadwell chips that nobody bought because Haswell was cheaper and there wasn't that much of a performance difference? Everyone just waited for Skylake (which wasn't that big of an increase either, but oh well)

[maxtch]

3 minutes ago, aisle9 said:

The 5775C is a glorified APU. You can safely skip it. A 4790K is your best bet for a Haswell upgrade from that beautiful Xeon, but you may not see enough improvement to justify the price.

Beautiful Xeon?

[aisle9]

1 minute ago, maxtch said:

Beautiful Xeon?

The E3-1231v3 is one of my all-time favorite CPUs, and I keep trying to find an excuse to buy and build around one. It's an i7-4770 for the price of an i5, basically. Hard to upgrade that while staying within the LGA1150 socket.

[maxtch]

2 minutes ago, aisle9 said:

The E3-1231v3 is one of my all-time favorite CPUs, and I keep trying to find an excuse to buy and build around one. It's an i7-4770 for the price of an i5, basically. Hard to upgrade that while staying within the LGA1150 socket.

There is a chance that my router/NAS combo server, running on decade-old Core 2 Quad Q9300 and Intel 3200 MCU, may die on me (although server-grade hardware are supposed to last for a very long time but a decade is still extreme.)

 

If that thing died on me, I can resurrect my old pair of E5-2620v2 (currently sleeping in my spare parts bin) but that means buying the more expensive C602 motherboard.

[Zodiark1593]

Stock, the 5775C tends to be slightly slower than the much higher (also stock) clocked 4790K. The iGPU is apparently about on par with the GTX 750. Grab it for the novelty, or skip it over. 

[maxtch]

8 minutes ago, Zodiark1593 said:

Stock, the 5775C tends to be slightly slower than the much higher (also stock) clocked 4790K. The iGPU is apparently about on par with the GTX 750. Grab it for the novelty, or skip it over. 

Can the 5775C be overclocked? I do have a Z97 board.

 

I can buy the 5775C and put it on my Z97 board, and buy a server-grade board with ECC RAM for the E3-1231v3.

[Zodiark1593]

11 minutes ago, maxtch said:

Can the 5775C be overclocked? I do have a Z97 board.

 

I can buy the 5775C and put it on my Z97 board, and buy a server-grade board with ECC RAM for the E3-1231v3.

Yes, it can be overclocked, however, there is still a substantial gap between the 4790K.

[maxtch]

1 hour ago, Zodiark1593 said:

Yes, it can be overclocked, however, there is still a substantial gap between the 4790K.

Substantial gap in what? Price?

[Đỗ Đức Huy]

http://www.anandtech.com/show/9482/intel-broadwell-pt2-overclocking-ipc/2

Quite bad OC number for an I7 chip, but here are a few novel feature of this CPU:

LAAAAAAAAAAARGE L4 cache, 128Mb to be exact. If your software can benefit from large cache then one plus point for the vaporware CPU

Good iGPU (trading blows with the 750 non ti). If your use case is an as small as possible in a corner PC that have to output good graphic, one more plus point for this vaporware CPU.

 

[porina]

I have the i5-5675C. They are overclockable, but not well. It took watercooling to get it to 4.1 GHz bench stable. The L4 cache does wonders for ram bandwidth intensive tasks which do fit.

[maxtch]

2 hours ago, aisle9 said:

The E3-1231v3 is one of my all-time favorite CPUs, and I keep trying to find an excuse to buy and build around one. It's an i7-4770 for the price of an i5, basically. Hard to upgrade that while staying within the LGA1150 socket.

You can buy one and build a 24/7/365 uptime machine out of it, using a motherboard with C226 chipset, ECC memory and Linux as the host operating system. It is a Xeon after all.

 

it can run a few virtual machines in it for a home user: a router with VPN, intrusion detection and prevention systems and network-wide antivirus; a NAS that keeps all your documents, videos and backups in an RAID array; and a gaming virtual machine with dGPU switched in through VT-d allowing you to game on your own rig from anywhere. The underlying Linux (or ESXi) host system never stops and gives you great reliability that way.

[othertomperson]

I've never seen desktop Broadwell in an actual online store. The i7 5775C is not a "glorified APU" (wtf?) it was just superceded by the i7 6700k that was released around the same time.

[porina]

3 minutes ago, othertomperson said:

I've never seen desktop Broadwell in an actual online store. The i7 5775C is not a "glorified APU" (wtf?) it was just superceded by the i7 6700k that was released around the same time.

The window of opportunity was relatively small. Desktop Broadwell came very late after Haswell. Skylake came not long after, like months. I actually picked up my Broadwell after Skylake just to test that L4 cache goodness. Unlike Haswell, it didn't have any staying power in retail.

[Zodiark1593]

7 hours ago, maxtch said:

Substantial gap in what? Price?

Typing on a phone, so I got lazy. 

 

Clock speed. The 5775C doesn't overclock nearly as high as the 4790K. 

[NumLock21]

5775c is a unlock cpu with igpu on steroids. Where it can reach 100fps in certain games. Reason why it's rare or not much have it was, on launch day the price of that is almost the same as a 5820K, but with less cores and the igpu targeting at the wrong audience. Intel still released it for the sake of their road map, even when skylake was around the corner. There is also a core i5 5675c.

 

[porina]

23 minutes ago, NumLock21 said:

5775c is a unlock cpu with igpu on steroids. Where it can reach 100fps in certain games. Reason why it's rare or not much have it was, on launch day the price of that is almost the same as a 5820K, but with less cores and the igpu targeting at the wrong audience. Intel still released it for the sake of their road map, even when skylake was around the corner. There is also a core i5 5675c.

I think it was launched so that Intel could say they didn't skip a generation. Broadwell was used in mobile, but desktop was very late. The desktop CPUs were unusual in that sense, with smaller L3 cache than CPUs either side, and a fat L4 cache added. This helps the GPU a lot, but let's not over sell it. It is still an iGPU after all, but the L4 cache substantially relieves the ram bandwidth limitations compared to other similar models.

 

When I built my current main system around mid 2015, 6700k and 5820k were practically same price. The Broadwell equivalent was also similar although I can't remember exactly. I think the L4 cache was an interesting thing, and would like to see it in future desktop CPUs, but it seems limited to Iris Pro on laptops only.

[NumLock21]

16 minutes ago, porina said:

I think it was launched so that Intel could say they didn't skip a generation. Broadwell was used in mobile, but desktop was very late. The desktop CPUs were unusual in that sense, with smaller L3 cache than CPUs either side, and a fat L4 cache added. This helps the GPU a lot, but let's not over sell it. It is still an iGPU after all, but the L4 cache substantially relieves the ram bandwidth limitations compared to other similar models.

 

When I built my current main system around mid 2015, 6700k and 5820k were practically same price. The Broadwell equivalent was also similar although I can't remember exactly. I think the L4 cache was an interesting thing, and would like to see it in future desktop CPUs, but it seems limited to Iris Pro on laptops only.

That was my point, for the sake of their road map since it has Broadwell on it. Can't remember the exact time it was release but it's around the time of x99 and that's back in 2014 or so.  Yes X99 has been out for 2 years.

[maxtch]

6 hours ago, Zodiark1593 said:

Typing on a phone, so I got lazy. 

 

Clock speed. The 5775C doesn't overclock nearly as high as the 4790K. 

Can it be brought up to the same speed as E3-1231v3 (3.4/3.8GHz) or the stock speed of i7-4790K (4.0/4.2GHz) on air cooling?

[porina]

9 hours ago, maxtch said:

Can it be brought up to the same speed as E3-1231v3 (3.4/3.8GHz) or the stock speed of i7-4790K (4.0/4.2GHz) on air cooling?

I'm running my 5675C at 3.5 GHz fixed with a Deepcool Lucifer which I only bought as it was cheap, but I run loads equivalent to Prime95 24/7 so I have to be conservative. During earlier benching I did hit 4.1 GHz bench stable (not fully tested), with an AIO watercooler. I couldn't get 4.2 bench stable. I'd imagine high end air like a Noctua D15 would be fine for at least 4 GHz in normal use.