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HP Recommended

Dima999,

 

I had a z620 with 2X Xeon E5-2690:

 

HP z620_1 (2012)(Rev 5) 2X Xeon E5-2690 (8-core @ 2.9 /3.8GHz) / 64GB (4X 8GB +4X 8GB DDR3-1600) / Quadro K2200 (4GB) / Samsung 850 Evo 250GB + Seagate Constellation ES.3 1TB / 800W > Windows 7 Professional 64-bit >  HP 2711x (1920 X 1080)

 

Performance was quite good;

 

[ Passmark System Rating= 5675 / CPU= 22625 / 2D= 815 / 3D = 3580 / Mem = 2522 / Disk = 12640 ] 9.25.16   Single Thread Mark = 1903

[ Cinebench R15: CPU = 2209 cb / Single core 130 cb / OpenGL= 119.23 fps / MP Ratio 16.84x] 10.31.16

 

That system was 100% reliable. 

 

I changed to a z620 V2 so that I could run a CPU with a higher single thread performance for 3D CAD:

 

HP z620_2 (2017) (Rev 3) > Xeon E5-1680 v2 (8-core@ 4.3GHz)  / z420 Liquid Cooling / 64GB DDR3-1866 ECC Reg / Quadro P2000 5GB / HP Z Turbo Drive M.2 256GB / HP/LSI 9212-41 RAID Controller + Intel 730 480GB + 2X Seagate Constellation ES.3 1TB / ASUS Essence STX PCIe sound card / 825W PSU /> Windows 7 Prof.’l 64-bit  > 2X Dell Ultrasharp U2715H  (2560 X 1440) / Logitech z2300 2.1 Sound
[ Passmark Rating = 6322 / CPU rating = 17178 / 2D = 852 / 3D= 9012 / Mem = 3032 / Disk = 14227 /  Single Thread Mark = 2339  [7.3.17]
[ Cinebench R15 = cb1214 (CPU) / 153 (Single Threaded) / 150.77 (OpenGL) MP Ratio 7.92x / Accuracy 99.6% ] 7.21.17

 

If your goal is to eventually have the highest performance dual processor zX20-series, consider buying a z820 v2 which will support 2X 12-core v2 CPU's.  It's possible to use Xeon E5 v1 on a v2 motherboard but in general, Xeon E5-v2 have more core potential, higher clock speeds per core and better single-thread perormance.  The RAM in E5- v2 is 1866MHz as compared to 1600 in v1. Importantly, there is also a special all in one z820 liquid cooler.  The other aspect is that the z820 motherboard is more open and I believe the air flow in the case is better. The z620 riser board has only four RAM slots and better memory performance in dual CPU systems is said to result with a symmetrical memory configuration between the two processors. A z820 having 2X E5-2697 v2 12-cores has a Passmark CPU score of 26741. The E5-2687W v2 8-core had the highest turbo clock speed of any E5-2600 v2 of 4.0GHz and in a z820 2X makes a CPU score up to 25572.  In a z620 the top 2X E5-2687W v2 scores 22355.

 

The z620 riser design is clever, and it locks securely into place, but I think that the added cost plus the limitation on riser RAM slots and these other factors makes a z820 v2 a more attractive long-term solution.

 

On Passmark baselines, the highest performance for 2X E5-2690 has a CPU mark of 22625 (my previous z620) and compare that to 2X E5-2690 v2 at up to 26543.

 

Given the current cost of the E5-2690,  at $130-160, the cost/performnce is difficult to better- an E5-2690 v2 is about $330-375 (10.18),  but if very high performance is required and cost is within reason not the limiting factor, a v2 series will be the better long-term solution.  It would be an advantage, as SDH suggests, to have a z620 V2 motherboard and use an E5- v1 processor and change it later.  I have a z420 v2 and have thought of running an E5-2690 first version in it for CPU rendering.

 

Also, look into the way the programs used can utilize the GPU's CUDA compute power. Under certain circumstances a single, faster CPU combined with a couple of GPUs having many CUDA cores can be much faster in computation and simulation.

 

BambiBoomZ

 

 

HP Recommended

Thank you for your fabulous and detailed reply...I am currently being offered to buy a used z820 and a used z620... Which costs 300 usd less.. Now the money is not that big difference here.. For me the primary concerns are - the noise of the workstation (z820 must be a lot louder?) And build reliability for extended maxed out calculation spells ( running at 99% for 10 Hours in a row).... Can the riser be less reliable??? Can it be a point of failure for 620? On the other hand the Fife fan construct used by 820 seems fragile as well)

 

Your reported speed of 22000 on passmark on dual 2690 looks very attractive to my single current performance of 13000 on a single 2680!)

 

HP Recommended

If  you do not need the expandability of the z820, and size is a concern get the z620

 

on the other hand, if you want/need the fastest cpu's and more than 128GB ram, or lots of internal drive space, more PCI-e slots, and a onboard LSI SAS/SATA controller get the z820

 

i have a z820, and it's actually very quiet and may possibly run cooler than a z620 due to it's greater size and more robust cooling solution however, since the z820 is a full sized tower case it's also about a 35% larger than a z620

 

also a z820 can be factory water cooled on both cpu's and the z620 can not

 

just make sure the z820 is a rev 1.03/1.04 board which is able to take the latest cpu's if the board is 1.02 or lower it will not support the later cpu's it's part number is 618266-001

 

the second version (the one you want)  1.03/1.04 will have part numbers 708464-001, 708610-001, or a close variation. 

 

this information is marked on the PCB near a white label attached to the board

 

https://h30434.www3.hp.com/t5/image/serverpage/image-id/169408i64DC35D9CABA3507/image-size/large?v=1...

 

 

HP Recommended

Dima999,

 

A couple of months ago, the prospect of substantial performance improvements at a very favorable cost /performance suggested buying only the minimal items and such that new hardware could be transferred to a new platform.  However, recent occurrences: the fabulously expensive Quadro and GeForce RTX without a correpsonding extreme improvement in performance due to proper utilization, the doubling in cost of certain CPU's of interest due to a "shortage" of processors such as the i7-7820X immediately before the introduction of the desparately touted i9-9900K, has prompted me to plan for z620_2 to stay on the job another two years.  The Xeon W-2145 with a very high single thread performance is  very atractive, but it's a $1,300 8-core.   Xeon E5  has a lot of life in it! 

 

In comparison of the z620 and z820, I think a z820  V2  has a much better long-term prospect:

 

1. Higher demand and resale value

2. Ability to use one or two processors

3.  Accommodates Xeon E5- up to 12-cores

___  Compare  E5-2690 8C@2.8/3.8GHz)Passmark =  13792/ Single Thread = 1803)  to Xeon E5-2690 v2 10C@3.0/3.6 = 16488 / Single Thread = 1824

4. Symmetrical RAM configuration with higher total capacity 

5.  The z620 CPU riser is an excellent functional design and of excellent quality, but:

____ there is a complex interface / connection

____ the z620 riser I believe must restrict the air flow in the chassis as compared ot the z820

____ the z620 does not have an easy solution to liquid CPU cooling of two processors whereas the z820 has an effective all-in-one liquid CPU cooler that simply plugs in.  Here is a mockup for high capacity liquid cooling for a  z620:

 

HP Z620_Liquid Cooling_RL_XRay_10.26.18..jpg

 ^ And, that's a complicated and expensive project in comparison to the standard, z820 plug-in solution.

 

Consider a z820 with 2X E5-2670 v2, E5-2680 v2, or E5-2690 v2 with liquid cooling, a fast PCIe OS/Programs drive with subsidiary cache drive and at least 64GB of RAM, and use only 8GB HP branded modules.  This system could be started with a single CPU and 32GB.  As software demands seem to have staibilized a bit,  that level of system might be effective a good 3-4 years,

 

BambiBoomZ

 

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.