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Questions about Xeon E5 V3 on X99 Mobo(5820K VS E5-1660 V3)

post #1 of 47
Thread Starter 
I Just purchased an ASUS X99A 3.1 mobo and 4x4G DDR4 2400 non-ECC RAM
Now I have some options for CPU
Option 1. 5820K:
6C/12T with 20M L3 cache and 28-lane, can be overclocked to 4+Ghz

Option 2. Xeon E5-1660 V3 ES L0 stepping
8C/16T with 35M L3 cache and 40-lane(base clock 2.9G, Turbo 3.2G)

The questions are
1. Can I use non-ECC memory on Xeon E5 V3?
2. Can I overclock Xeon E5 1660V3? Are they unlocked? (both multipliers and bclk oc are fine with me)
3. For this weird E5-1660 V3 which has 20-way 35M L3 Cache (Retail one has 20-way 20M L3), can this CPU really use all 35M L3? Or those extra 15M are just idle and useless.

Edit
This ES chip does not identify itself as an E5-1660V3, but I find the specifications here.
http://www.cpu-world.com/sspec/QE/QEYA.html
I have no idea what QEYA means e5-1660.jpg 303k .jpg file
Edited by JustinZanyo - 10/22/15 at 3:44pm
post #2 of 47
1. Yes
2. Yes
3. no clue
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post #3 of 47
I'm curious... why are those your two options and are they the same price? Usually there would be a 5960x option.

If they are the same price, I would take the e5-1660 v3 regardless if its unlocked or can utilize all the cache (I bet it can since it's an Engineering Sample).
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post #4 of 47
The Xeon will also likely overclock better. I'd grab Xeon no doubt.
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post #5 of 47
Quote:
Originally Posted by BinaryDemon View Post

I'm curious... why are those your two options and are they the same price? Usually there would be a 5960x option.

If they are the same price, I would take the e5-1660 v3 regardless if its unlocked or can utilize all the cache (I bet it can since it's an Engineering Sample).

Quote:
Originally Posted by iinversion View Post

The Xeon will also likely overclock better. I'd grab Xeon no doubt.

He's looking at the ES on Ebay for either 480 or 498. As long as it overclocks and uses all 40 PCIE lanes... I'd take the 1660. 5820k's should be reserved for MATX or M ITX builds honestly.
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post #6 of 47
Thread Starter 
Quote:
Originally Posted by BinaryDemon View Post

I'm curious... why are those your two options and are they the same price? Usually there would be a 5960x option.

If they are the same price, I would take the e5-1660 v3 regardless if its unlocked or can utilize all the cache (I bet it can since it's an Engineering Sample).
Yes, I can grab either at almost the same price.
post #7 of 47
Thread Starter 
Quote:
Originally Posted by iinversion View Post

The Xeon will also likely overclock better. I'd grab Xeon no doubt.
Are you sure that ES Xeon can also be overclocked? (I mean huge overclock, not those 105mhz bclk small increase.
post #8 of 47
Quote:
Originally Posted by JustinZanyo View Post

Are you sure that ES Xeon can also be overclocked? (I mean huge overclock, not those 105mhz bclk small increase.

The 1660s should be multiplier unlocked... see this

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post #9 of 47
Quote:
Originally Posted by JustinZanyo View Post

Are you sure that ES Xeon can also be overclocked? (I mean huge overclock, not those 105mhz bclk small increase.

I have a E5 1650 v1(sandy bridge) running 50x multiplier right now. Yes they should be fully unlocked.


Edited by iinversion - 10/22/15 at 3:24pm
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post #10 of 47
Thread Starter 
Quote:
Originally Posted by MunneY View Post

The 1660s should be multiplier unlocked... see this

This is a QS version of 1660 v3
QS is a special type of ES. Usually QS are sent to the press to do test and review.

I am looking at a normal ES which does not even identify itself as an 1660 V3
E5-V3 68k .jpg file
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