8 way xeon vs i7 5930k or i7 7700k

[questioncpu]

Hi, i am gonna build a new monster pc and i need advise. Primarily, it will be used for rendering, but i will also play games on it.
1 Pc:
amd rx 480 gpu
i7 7700k or i7 5930k
32gb ram
and so on....

2 option:
amd rx 480 gpu
8*cpu xeon e7 8850(need compatible motherboard of course)
32gb ram
and so on...

Now this is what i know. I know that xeon processor has lower ghz and is not overclockable.
but per maths it should be stronger.
8 cours will have 80 cores multiplied with base frequence 2ghz makes 160ghz.
i7 5930k will have 6*3.5ghz=21 ghz.
My questions are the following...
1.i7 5930k supports ddr4 4 2133 mhz but e7 8850 supports only ddr3 1333 mhz.
Does this make a difference in speed, so more cores on xeon would be useless??
2. i7 has more memory bandwith speed 68 gb/s while xeon only has 39,2 gb/s. does this mean i7 will be faster than 8 time xeon.
3. When i run games, will i7 beat xeon, cause it has higher single clock speed.
ususally xeon has more cores so per maths it should beat i7. But i heeard that games dont use
more cores, they only use 2 or 4 cores. Will this mean that xeon will be useless and 8 times cpu xeon give less fps than only one i7.
I hope you will answer soon. I am asking you, cause i am a newbie and have low experience.
The money is not the problem. I just need more content information.
Thank you veryy much in advance

 

[kanewolf]

First, I don't believe there are 8 socket motherboards. Just 4 socket boards that can be combined with special hardware. You can't run Windows desktop software with more than two sockets. Finding an E7-8xxx motherboard is usually difficult and expensive. It is a fool's game.

If you want a Xeon based system get an E5-2xxx V2 or newer. Those are dual socket CPUs used in workstations and 1U and 2U servers. BUT I don't recommend 1U/2U configurations. They use riser cards for PCIe access and often have proprietary power and front panel connections.

 

[Lopperuk]

I wouldn't call an RX 480 a 'monster' if you really wanted a monster build you'd atleast go with a gtx 1080

 

[Roland Of Gilead]

Now this is what i know. I know that xeon processor has lower ghz and is not overclockable.
but per maths it should be stronger.
8 cours will have 80 cores multiplied with base frequence 2ghz makes 160ghz.
i7 5930k will have 6*3.5ghz=21 ghz.

thats not how things work! The higher single core speed of the I7's will make them much better/faster specially for gaming. You can't combine the speed of all cores (ie your ref to 160ghz)

id go for the 5930k, and a beefier GPU. The other poster is correct. The RX480 is a mid-high end card. Don't get me wrong, it's a good card. But there's better out there. Something like a GTX1080/TI if its a monster rig you want.

 

[questioncpu]

THANKS FOR THE ANSWERS: yES I KNOW THAT RX 480 is not a monster gpu, but you know i have to look also on my budget and i am not sure yet, how intense i will use that. But my question is answered.
Only what has interested me was higher single core speed in comparison with multiple cpu cores running at lower frequency. But i will stick to i7,
cause it will be safer for me now. It will run games better as keith12 said. thatswhy i said i am a newbie :
Thank you very much. I appreciate all help.

 

[bambiboom]

Hi, i am gonna build a new monster pc and i need advise. Primarily, it will be used for rendering, but i will also play games on it.
1 Pc:
amd rx 480 gpu
i7 7700k or i7 5930k
32gb ram
and so on....

2 option:
amd rx 480 gpu
8*cpu xeon e7 8850(need compatible motherboard of course)
32gb ram
and so on...

Now this is what i know. I know that xeon processor has lower ghz and is not overclockable.
but per maths it should be stronger.
8 cours will have 80 cores multiplied with base frequence 2ghz makes 160ghz.
i7 5930k will have 6*3.5ghz=21 ghz.
My questions are the following...
1.i7 5930k supports ddr4 4 2133 mhz but e7 8850 supports only ddr3 1333 mhz.
Does this make a difference in speed, so more cores on xeon would be useless??
2. i7 has more memory bandwith speed 68 gb/s while xeon only has 39,2 gb/s. does this mean i7 will be faster than 8 time xeon.
3. When i run games, will i7 beat xeon, cause it has higher single clock speed.
ususally xeon has more cores so per maths it should beat i7. But i heeard that games dont use
more cores, they only use 2 or 4 cores. Will this mean that xeon will be useless and 8 times cpu xeon give less fps than only one i7.
I hope you will answer soon. I am asking you, cause i am a newbie and have low experience.
The money is not the problem. I just need more content information.
Thank you veryy much in advance

questioncpu,

A system that is good at CPU rendering and gaming is likely not to be too great at either. CPU rendering, when fully threaded, uses every CPU core- and sometimes CUDA cores in either the GPU or a coprocessor such as NVIDIA Tesla or Xeon Phi.

The more cores in a CPU, the lower the clock speed. For gaming, the single thread performance rules. Today,there are more games that distribute other processes over several cores, but in the majority of games, having more than a four core is still not an advantage.

As a 4-core can have a higher clock speed- better single-thread rating than a 6 or 8-core- unless it is fabulously expensive, the gaming system will be optimized with a i7-7700K, whereas the rendering system is better having a pair of 8-12 core Xeons. A rendering system should not be overclocked by the way.

You didn't mention a budget , but if you're considering an E7-8850 system, which will cost at least $70-80,000, I think it would be more useful and less expensive to buy a Dell or HP dual Xeon workstation having a pair of 12 or 14-core E5-2600 v4's / 128GB ECC reg RAM / 2X Quadro P4000 8GB / 500GB or 1TB M.2 and a separate gaming system with an i7-7700K and pair of GTX 1080Ti / 16GB / M.2.

If you would like a single system good at both tasks, a fast single 8-core will be the best as dual CPU systems have some latency in sending threads to two processors. An 8-core CPU with a very good single-thread performance is the i7-6900K (3.2/3.7GHz) or there is the Xeon E5-1680 v4 (3.4/4.0GHz) which would be my choice.

If you need to produce a very large number of renderings over a short period, and would like to do that very economically, a better approach would be to build/ upgrade two or three systems based on obsolete workstations. Our office rendering system:

Purchased for $270:

HP z620 (Original) Xeon E5-1620 4-core @ 3.6 /3.8GHz) / 8GB (1X 8GB DDR3-1333) / AMD Firepro V5900 (2GB) / Seagate Barracuda 750GB + Samsung 500GB + WD 500GB
[ Passmark System Rating= 2408 / CPU= 8361 / 2D= 846 / 3D = 1613 / Mem =1584 / Disk = 574] 7.13.16

Upgrade cost, about $1,100:

HP z620 (2012) (Rev 3) 2X Xeon E5-2690 (8-core @ 2.9 / 3.8GHz) / 64GB DDR3-1600 ECC reg) / Quadro K2200 (4GB) + Tesla M2090 (6GB) / HP Z Turbo Drive (256GB) + Samsung 850 Evo 250GB + Seagate Constellation ES.3 (1TB) / Creative Sound Blaster X-Fi Titanium PCIe sound card + Logitech z313 2.1 speakers / 800W / Windows 7 Professional 64-bit > > HP 2711x (27" 1980 X 1080)
[ Passmark System Rating= 5675 / CPU= 22625 / 2D= 815 / 3D = 3580 / Mem = 2522 / Disk = 12640 ] 9.25.16
[ Cinebench R15: CPU = 2209 cb / Single core 130 cb / OpenGL= 119.23 fps / MP Ratio 16.84x] 10.31.16

That z620 currently has the highest z620 system rating on Passmark. The Tesla M2090 6GB CUDA co-processor accelerates CPU renderings a noticeable amount. The Cinebench R15 CPU score of 2209 is more than double the 1031 of the office Xeon E5-1660 v2 6-core @ 3.7/4.0GHz, showing that more but slower cores wins the race in CPU rendering. You could have three of these systems for the cost on one Xeon E7 CPU.

Another good way to to do this is to buy a couple of Supermicro Superworkstation daul LGA2011 "barebones" system that provides a case, motherboard supporting Xeon E5-2600 v2, CPU coolers, and power supply:

Supermicro SuperWorkstation SYS-7037A-i (Black)


SuperWorkstation SYS-7037A-I Dual Socket LGA2011 Xeon 900W Mid-Tower Workstation Barebone System (Black) > $733.99

And add to these a pair of used Xeon E5-2670 v2 10-core @ 2.5/.3.3GHz, 128GB RAM and a pair of the upcoming Quadro P2000 5GB or P4000 8GB GPU's.

Xeon typically have a MTBF of 170.000 hours, which more or less means they are rated to run at full performnace for 19+ years continuously.

In your use, and having a substantial budget, consider buying a couple of HP z640 or z840's with for example a pair of E5-2650 v4 12-cores or 14-core E5-2600 v3's. Here's and example:

HP Z840

Windows 10 Pro 64 - HP recommends Windows 10 Pro.
Intel® Xeon® E5-2650v4 2.2 2400 12C 1st CPU
Intel® Xeon® E5-2650v4 2.2 2400 12C 2nd CPU
HP Z840 850W 88 Percent Efficient Chassis
128GB DDR4-2400 (8x16GB) 2 CPU Registered RAM
512 GB HP Z Turbo Drive G2 PCIe SSD
Operating System Load to SATA/SAS
512 GB SATA Self Encrypting (SED) SSD
4 TB 7200 RPM Enterprise SATA 2nd HDD
NVIDIA Quadro M4000 8GB 4xDP 1st No cable included Graphics
NVIDIA Quadro M4000 8GB 4xDP 2nd No cable included Graphics
HP Remote Graphics Software (RGS) for Z
9.5mm Slim Blu-ray Writer SATA 1st Optical Disc Drive
HP USB CCID Smartcard Keyboard
HP USB Optical Mouse
HP Dual Processor Air Cooling Kit
ENERGY STAR Qualified Configuration
HP 3/3/3 Warranty
HP Single Unit Packaging
HP Z840 Country Kit
_____________________

$11,747.19 each

These would have both excellent CPU and GPU rendering performance.

Then, have a dedicated gaming system based on an i7-7700K/ 2X GTX 1080Ti /Samsung 960 Evo.

Why compromise?

Cheers,

BambiBoom

CAD / 3D Modeling / Graphic Design:

HP z420 (2015) (Rev 3) > Xeon E5-1660 v2 (6-core @ 3.7 / 4.0GHz) / 32GB DDR3 -1866 ECC RAM / Quadro K4200 (4GB) / Samsung SM951 M.2 256GB AHCI + Intel 730 480GB (9SSDSC2BP480G4R5) + Western Digital Black WD1003FZEX 1TB> M-Audio 192 sound card + Logitech z2300 2.1 speakers > 600W PSU> > Windows 7 Professional 64-bit >> 2X Dell Ultrasharp U2715H (2560 X 1440)
[ Passmark Rating = 5581 > CPU= 14046 / 2D= 838 / 3D= 4694 / Mem= 2777 / Disk= 11559] [6.12.16] Single-Thread Mark = 2341
[Cinebench R15 > CPU = 1031cb / Single Core = 142 cb / OpenGL= 127.39 fps / MP Ratio = 7.24x] 3.2.17
[FryBench: 3:24 /Efficiency 2177.13] 3.11.17