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Maxunderground news unavailable

i7 vs xeon workstation performance?
show user profile  Ali3D
recently my boss has bought a workstation,
intel xeon E5645 @ 2.40 Ghz (6 cores real + 6 virtual) with 12 GB of ram
i launched an equal render on both computers, comparing the results, i didnt see any significant difference in render time. while on this new computer the render took 52m 24s
, on the old computer:
i7 950 @ 3.04 Ghz with 6 GB of Ram
it took 1h and 50 seconds

is that us expecting too much or is there something wrong?
cosnidering the fact that on i7, i had not activated turbo mode. (it was set to "high performance")

rendering times edited*
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http://Ali3D.ir

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read 3010 times
1/3/2012 6:05:25 PM (last edit: 1/3/2012 6:53:04 PM)
show user profile  del3d
what renderer?
read 2990 times
1/3/2012 6:31:31 PM (last edit: 1/3/2012 6:31:31 PM)
show user profile  Ali3D
vray
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http://Ali3D.ir

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read 2987 times
1/3/2012 6:32:25 PM (last edit: 1/3/2012 6:32:25 PM)
show user profile  Bolteon
the difference is...


that i7? is the only chip you can put into that motherboard.

the xeon? with the right motherboard can go x8 (ie 48 cores physically, 96 total)

the time comparison makes sense; considering the clock speeds.

-Marko Mandaric



read 2981 times
1/3/2012 6:38:07 PM (last edit: 1/3/2012 6:38:48 PM)
show user profile  advance-software
sounds like a cr@p xeon.

this r a good xeon :

http://www.intel.com/content/www/us/en/processors/xeon/xeon-processor-e7-family.html?iid=subhdr%20itc_xeon

(quite pricey though so probably best sticking to i7s for now)
read 2974 times
1/3/2012 6:40:51 PM (last edit: 1/3/2012 6:41:25 PM)
show user profile  del3d
Are you using all threads (12) when rendering using the xeon? Sorry if it sounds offending to you. That is the only thing that comes to my mind.
I would imagine the two would be at least equal.
read 2967 times
1/3/2012 6:45:21 PM (last edit: 1/3/2012 6:45:21 PM)
show user profile  Ali3D
sorry guys, i misplaced the rendering time,
the shorter time goes for xeon, and the longer time for i7
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read 2960 times
1/3/2012 6:51:45 PM (last edit: 1/3/2012 6:51:45 PM)
show user profile  Ali3D
yeah it uses all 12 threads, but i expected more difference in render time rather than 9 mins, at least due to the prices!
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http://Ali3D.ir

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read 2954 times
1/3/2012 6:54:15 PM (last edit: 1/3/2012 6:54:15 PM)
show user profile  advance-software
could run this to see how it compares vs. other systems.

http://www.maxforums.org/threads/iray_gpu_cpu_comparison_test/0001.aspx

read 2951 times
1/3/2012 6:55:38 PM (last edit: 1/3/2012 6:55:48 PM)
show user profile  Ali3D
here there is only 3d max 2011, though i think i can give it a try within a month or 2

right now i am doing a render, and the cpu usage is like 20% they are not under full load!

edit: ^^^ ok that happens only when i do a small regional render
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read 2944 times
1/3/2012 7:10:14 PM (last edit: 1/3/2012 7:16:43 PM)
show user profile  advance-software
also if you feel like it you could try intel's embree real time raytracer tech demo.

no real practical benefit right now but it'd give your system a workout.

there's a thread around here somewhere.
read 2938 times
1/3/2012 7:17:21 PM (last edit: 1/3/2012 7:17:21 PM)
show user profile  Mr_Stabby
core to core clock to clock there is no performance difference between a xeon or an i series cpu of the same architecture. The advantages of xeons are different - support for multi socket configurations (how many depends on the model), ecc ram, sometimes optional buffered ram support and well.. that is it really... none of them particularly useful for work with max. There is no point in buying a single socket xeon system.

The cpus you are comparing are both westmeres, the i7 is a quad core and the xeon is a hexacore so very roughly
i7: 4x3.04 = 12.16
xeon: 6x2.4 = 14.4
the performance increase factor: 14.4/12.6=1.143
and surely enough 61 mins / 1.143 = 53 mins

So i would say the difference is spot on what it should be. Do note though not all workloads scale as linearly with cpu count as rendering does so in less threaded tasks(which in max include cloth simulation and geometry spawning for example) the new xeon is actually a good bit slower.

There is no equivalent for e5645(which has 2p option btw) in the i series cpus (in terms of stock configuration) but there is the i7-970 which costs the same and runs 33% faster.. further more there is the new architecture i7 3930k which also costs the same and performs around 50% better. Im sorry to say but your boss got shafted :(

read 2934 times
1/3/2012 7:19:55 PM (last edit: 1/3/2012 7:21:04 PM)
show user profile  Ali3D
hey guys thank you very much, it was really helpful :)
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read 2823 times
1/13/2012 8:03:48 PM (last edit: 1/13/2012 8:03:48 PM)
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