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AMD EPYC 7251 Provides Great Value At Less Than $500 USD
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Would it be possible to setup Ryzen CPUs (Threadripper probably) with multiple GPUs and virtualize gaming desktops there for an entire family? I would put the machine in a rack, provide each family member with 16GB RAM + 4 cores and dedicated GPU. Is it a viable solution? How the video from the VM would be streamed to cut on the latency?
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Originally posted by schmidtbag View PostBut Epyc was often outperforming (or close to it) the Xeons of similar core counts and/or frequencies. So even ignoring price point, Epyc was still doing oddly very good, and I'm not sure the extra memory channels are enough. But maybe I'm wrong - this is why I'm interested in an IPC test against Ryzen.
I'm not sure what the comparision with the 1950X shows, apart from having 2x cores and 32MB L3, gives you almost 2x the performance in the CPU bound test.
1800X/1950X Rodinia benchmark: https://www.phoronix.com/scan.php?pa...tr-1950x&num=3
7251 Rodinia benchmark: https://www.phoronix.com/scan.php?pa...pyc-7251&num=2Last edited by audir8; 17 October 2017, 03:27 PM.
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Originally posted by killyou View PostWould it be possible to setup Ryzen CPUs (Threadripper probably) with multiple GPUs and virtualize gaming desktops there for an entire family? I would put the machine in a rack, provide each family member with 16GB RAM + 4 cores and dedicated GPU. Is it a viable solution?
How the video from the VM would be streamed to cut on the latency?
I know Xen has proven to work in the way you're imagining. Might want to look into that.Last edited by schmidtbag; 17 October 2017, 03:33 PM.
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Originally posted by orzel View Post"The EPYC 7251 is a 2P-capable part priced ...."
Is it supposed to be obvious what '2p-capable' means .. ????Michael Larabel
https://www.michaellarabel.com/
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Meh.Using Epyc for CPU muscle alone doesn't make much sense. It's low frequency part that doesn't have that much to offer if anyone doesn't need extra PCIe lanes, ECC, 2-socket suport and quad-channel RAM. And those extra RAM channels count for something only if one needs ECC and register, otherwise they might not be such a bandwidth upgrade over two smokin fast DDR4 channels.
These things are for apps that absolutely must have an access to big amounts of RAM and need two sockets to do that, possibly through several boards, interconnected with Infiniband or similar glue.
For one onbard/one socket solution, Threadripper would smoke it. 1950x is twice the price of 7251, but that will diminish once you factor in price of board + RAM.
And at that ptice, 1950x offers almost four times of CPU muscle -ie 2x cores at almost 2x speed...
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I beg to differ with the "Great Value" claim; both Xeons mentioned, the Silver 4108 and the Silver 4112 have AVX-512 support, Epyc cpu's do not, in many floating point heavy applications, such as those in HPC workloads like various simulation type workloads, the Xeons will simply walk away from Epyc's.
So long as AMD continues to make processors based on a competitors ISA technology, they will continue to be in second place in market share, revenue and performance.
Perhaps AMD should have focused on their ARM based Opteron line, grow that market, as it seems that ARM is the future, hell it's even rumored that Apple is developing their own ARM based cpu to replace Intel's processors in the Apple desktops.
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Originally posted by schmidtbag View PostI don't know if it's just because the frequencies are different, but I find it odd how Epyc seems to be so much better than Xeon, whereas Ryzen is underwhelming compared to the Core i series.
Michael: Might be interesting to see an IPC test of Ryzen vs Epyc, with the 8700K and the Xeon Silver included in the mix too.
1. With the Xeon line, Intel doesn't have the huge clockspeed lead over AMD. Most of the reason why 7700k or 8700k seem to be "so great" is because they are clocked right near their silicon limit, 15-20% over their Ryzen competition.
2. SkyLake-X vs SkyLake. AVX-512 notwithstanding, having bigger slower L2 cache and mighty slower, smaller L3 cache might actually cause performance regressions in certain workloads.
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