15 Core Xeon Ivy Bridge Ex

Reports from ISSCC are coming out that Intel is preparing to launch a 15-core Xeon CPU.  The xv-core model was postulated before Ivy Bridge-Due east launch, forth with 12-core and 10-cadre models – the latter ii are currently on the market just Intel was rather silent on the fifteen-core SKU, presumably because it harder to manufacturer i with the right voltage characteristics.Releasing a 15-core SKU is a little odd, and one would presume is well-nigh likely a xvi-core model with i of the cores disabled – based on Intel's history I doubt this core will be able to be re-enabled should the silicon notwithstanding work. I only received the official documents and the 15 cadre SKU is natively xv-core.

Information from the original source on the acme end CPU is as follows:

• 4.31 billion transistors
• Volition be in the Xeon E7 line-upwardly, suited for 4P/8P systems (8 * 15 * 2 = 240 threads potential)
• 2.viii GHz Turbo Frequency (though the design volition scale to three.viii GHz)
• 150W TDP
• 40 PCIe lanes

Judging by the bachelor information, it would seem that Intel are preparing a stack of 'Ivytown' processors along this design, and thus a range of Xeon E7 processors, from ane.4 GHz to three.viii GHz, drawing between 40W and 150W, similar to the Xeon E5 v2 range.

Predictions have Ivytown to be announced next week, with these details being office of the ISSCC briefing talks.  In comparison to some of the other Xeon CPUs available, equally well every bit the last generation:

Intel Xeon Comparison
	Xeon E3-1280 v3	Xeon E5-2687W	Xeon E5-2697 v2	Xeon E7-8870	Xeon E7-8890 v2
Socket	LGA1150	LGA2011	LGA2011	LGA1567	LGA2011
Architecture	Haswell	Sandy Bridge-EP	Ivy Bridge-EP	Westmere-EX	Ivy Span-EX
Codename	Denlow	Romley	Romley	Boxboro	Brickland
Cores / Threads	iv / viii	8 / 16	12 / 24	10 / 20	15 / 30
CPU Speed	iii.6 GHz	3.1 GHz	2.7 GHz	2.4 GHz	two.viii GHz
CPU Turbo	4.0 GHz	3.8 GHz	3.5 GHz	ii.8 GHz	2.8 GHz
L3 Cache	viii MB	20 MB	thirty MB	30 MB	37.5 MB
TDP	82 W	150 West	130 W	130 West	155 W
Memory	DDR3-1600	DDR3-1600	DDR3-1866	DDR3-1600	DDR3-1600
DIMMs per Channel	2	ii	ii	two	3 ?
Price at Intro	$612	$1885	$2614	$4616	>$5000 ?

According to CPU-World, there are 8 members of the Xeon E7-8xxx v2 range planned, from 6 to 15 cores and 105W to 155W, along with some E7-4xxx v2 likewise featuring 15 cadre models, with 2.viii GHz being the height 15-core model speed at 155W.

All this is tentative until Intel makes a formal proclamation, but there is clearly room at the high end.  The tradeoff is always between cadre density and frequency, with the higher frequency models having lower cadre counts in order to beginning power usage.  If nosotros go more information from ISSCC nosotros will allow you know.

Original Source: PCWorld

Update: Now I have fourth dimension to written report the document supplied by Intel for ISSCC, we can confirm the 15-core model with 37.5 MB L3 cache, using 22nm Hi-K metal-gate tri-gate 22nm CMOS with nine metal layers.  All the Ivytown processors will be harvested from a single die:

Ivytown Dice Shot

The blueprint itself is capable of 40W to 150W, with i.4 GHz to iii.viii GHz speeds capable.  The L3 cache has 15x 2.5MB slices, and information arrays use 0.108µm ⁱⁱ cells with in-line double-fault-correction and triple-fault-detection (DECTED) with variable latency.  The CPU uses three clock domains every bit well equally five voltage domains:

Level shifters are placed between the voltage domains, and the design uses lower-leakage transistors in non-timing-disquisitional paths, acheving 63% use in the cors and 90% in not-cadre expanse.  Overall, leakage is ~22% of the full power.

The CPUs are indeed LGA2011 (the shift from Westmere-EX, skipping over Sandy Bridge, should make information technology seem more plausible), and come in a 52.5x51.0mm bundle with iv DDR3 channels.  That would make the package 2677 kyard ⁱⁱ , similar to known Ivy Bridge-E Xeon CPUs.

CPU-Earth's list of Xeon E7 v2 processors come from, inter alia, this non-Intel document, listing the 105W+ models.

Source: https://www.anandtech.com/show/7753/intel-readying-15core-xeon-e7-v2

Posted by: meekinstheady.blogspot.com

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