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Discussion Starter #1 (Edited)
I have a Xeon E5-1620 v3 installed in an Asus Strix x99 motherboard along with 16GB of 3000Mhz memory. So far, I'v been running everything on auto with 2133 memory.

Would it cause problems enabling XMP for the 3000Mhz memory? It increases cpu strap from 100 to 125 to enable the higher memory overclock. Never had an issue with i7-6800k / 5820k doing this but I'm not sure how Xeon cpu would behave.

Enabling xmp would also allow the maximum 36x multiplier to be an overclock. Is any of this worth a shot? I'm going to be selling this to family and want them to get the most out of it with a GTX 1080.
 

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Discussion Starter #2
I decided to try enabling XMP and it doesn't work. Xeon CPU handle the strap at 125 and won't post.

So I set the multiplier at 36 so all cores are at the max turbo frequency. Saw a 1% improvement in a multi core load.
 

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the 1620 is still locked.


If you grab a 1650/1660/1680 they are unlocked and you can overclock like normal.


Best i ever did with my 1620 V3 was FSB at 104.5.


If you switch to a V4 xeon, you open up to 2400 ram (makes a real difference) but you also get the ability to change the PCIE ratio and cpu strap, for a bit more out of the FSB
 

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Which 8 and 10 core unlocked xeons are currently best buy for x99 if you guys dont mind me asking?
E5 1680 v3 is the only unlocked xeon 8 core for your platform and it comes it around 150-180 usd on ebay. You could get a 5960x off of ebay for around the same price but id be willing to say the xeon has better silicon.
 

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I recently dropped in a e5-1650 V4, and it can run the 2400 ram strap, but I can boot 104.3 base clock for a ram speed of about 2500.

With some ram tuning, you can have a very snappy system.


My biggest grief is not being able to tune the cache speed. It bounces with usage, so it usually idles around 1400mhz, but jumps to 2800mhz under actual load. o sometimes the machine does suddenly get more responsive as you load it up.

so far my trick has been to have something running on my second monitor that barely uses cpu, but has to use some ram, and it at least keeps the cache speed at or above 2200mhz usually
 
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