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[Guru3D] SiliconLottery.com 5GHz 4790k Reviewed

post #1 of 707
Thread Starter 
Quote:
Today we test a Core i7 4790K has we have obtained from siliconlottery.com Mind you that we purchased a processor, this is not a review sample. This small company offers pre-tested and binned processors, at reasonable prices as well. Depending on the yield / voltage requirements expect roughly 350 USD for a 4.8 GHz 4790K running up-to a 5 GHz 4790K for roughly 430 USD. These prices vary based on yields, lower voltages versus high clock frequency processors as such are more expensive. Now I purchased a Core i7 4790K that is binned at 5 GHz guaranteed at a 1.375 Volt VCORE with a 1.97V CPU VCCIN (input voltage). Being Guru3D we did get a bit of a discount and purchased this SKU for 350 USD.

Guaranteed 5 GHz you say ? – honestly I was a little skeptic as motherboards vary, cooling varies but most of all system stability varies and herein lies a danger. Silicon lottery makes their batches and selections properly though, each sold SKU has passed Intel’s Extreme Tuning Utility (Intel XTU) test for one hour, in our case the Core i7 4970K, the recommended settings that they offer are:

50x CPU multiplier
1.375C CPU Core Voltage
1.97V CPU VCCIN (CPU Input voltage).
Literally these are the only three things we need to select in our BIOS to get this overclock going. Included with the processor is a fact sheet of the settings they (and you should) use.




We enabled our XMP profile at 2133 MHz for the memory, and applied the settings as aforementioned in our BIOS. Instantly we booted into windows, and to see 5 GHz for the first time, yeah that does bring a smile upon your face.



The first try easily passed a 1m Wprime run. After a little more tweaking we noticed a couple of things:

-We purchased a 5.0 GHz processor and indeed it is 100% stable at 5 GHz, 5.1 GHz would boot as well, but did not remain stable no matter what we tried voltages wise.

-CPU Core Voltage - You will have a bit of playroom voltages wise. At 5 GHz we can still boot at 1.30 Volts but stability became an issue. We needed to settle at 1.35 Volts for complete stability. That is a notch lower then we purchased, which is great.

-CPU VCCIN (Processor input voltage ) – here you will find a notch more bandwidth to play with. We found that the recommended 1.97 V was not needed. Lowering VCCIN to 1.90 Volts resulted into a perfectly fine input voltage while consuming less power and producing less heat.

So after checking, testing, stressing and tweaking we ended at the following settings:

-50x CPU multiplier
-1.35V CPU Core Voltage
-1.90V CPU VCCIN (CPU Input voltage).



Here's their full SKU:





Source: http://www.guru3d.com/articles_pages/core_i7_4790k_processor_5_ghz_review_a_silicon_lottery,1.html
Source 2: http://siliconlottery.com/

Additional details:
Quote:
The Silicon Lottery proprietor/owner has an account here on OCN if you guys have questions. @Silicon Lottery Also there's a few people in the Devils Canyon club who already have chips from Silicon Lottery. He/she has said they will ship to many places not officially listed, just contact them.

Edited by BiG StroOnZ - 1/17/15 at 12:52pm
post #2 of 707
I think $430 for a proven 5.0GHz DC is a steal.
Lil' Roy Taylor
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Lil' Roy Taylor
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post #3 of 707

Its an interesting concept, but im skeptical that an hour of XTU is stable.  I know they dont have the time for this, but id be more than happy to pay if they had say ran folding@home for 24 hours.  Surely they dont move that many chips that they only have an hour per cpu to test?

 

Also the 5Ghz cpu is sold out? Did they only have one 5ghz cpu (which got sent to guru3d?)

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post #4 of 707
Perfect for those that don't want to play the silicon lottery. What do they do with the poorer clocking ones though?
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Millenium Falcon
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post #5 of 707
Thread Starter 
Quote:
Originally Posted by p4inkill3r View Post

I think $430 for a proven 5.0GHz DC is a steal.

Here's their full SKU:

post #6 of 707
Quote:
Originally Posted by Tsumi View Post

Perfect for those that don't want to play the silicon lottery. What do they do with the poorer clocking ones though?

 

Probably bin them.

 

Get it? :p

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post #7 of 707
Thread Starter 
Quote:
Originally Posted by $ilent View Post

Also the 5Ghz cpu is sold out? Did they only have one 5ghz cpu (which got sent to guru3d?)

This review was released at 10AM this morning, so I imagine once word got out they were gone.
post #8 of 707
Honestly, I wouldn't mind paying $1179 for a 4.7Ghz 5960X @ 1.30v. That's only a little bit more than a retail 5960X and 4.7Ghz is pretty much cream of the crop @ 1.3v Push it a little more with 1.4v and you might even be able to reach 4.8Ghz. thumb.gif
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post #9 of 707
Pretty good idea. These CPU OC about the same with any MB really.
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post #10 of 707
No AMD products?
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