• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

AMD EPYC "Genoa" Zen 4 Processor Multi-Chip Module Pictured

btarunr

Editor & Senior Moderator
Staff member
Joined
Oct 9, 2007
Messages
47,279 (7.54/day)
Location
Hyderabad, India
System Name RBMK-1000
Processor AMD Ryzen 7 5700G
Motherboard ASUS ROG Strix B450-E Gaming
Cooling DeepCool Gammax L240 V2
Memory 2x 8GB G.Skill Sniper X
Video Card(s) Palit GeForce RTX 2080 SUPER GameRock
Storage Western Digital Black NVMe 512GB
Display(s) BenQ 1440p 60 Hz 27-inch
Case Corsair Carbide 100R
Audio Device(s) ASUS SupremeFX S1220A
Power Supply Cooler Master MWE Gold 650W
Mouse ASUS ROG Strix Impact
Keyboard Gamdias Hermes E2
Software Windows 11 Pro
Here is the first picture of a next-generation AMD EPYC "Genoa" processor with its integrated heatspreader (IHS) removed. This is also possibly the first picture of a "Zen 4" CPU Complex Die (CCD). The picture reveals as many as twelve CCDs, and a large sIOD silicon. The "Zen 4" CCDs, built on the TSMC N5 (5 nm EUV) process, look visibly similar in size to the "Zen 3" CCDs built on the N7 (7 nm) process, which means the CCD's transistor count could be significantly higher, given the transistor-density gained from the 5 nm node. Besides more number-crunching machinery on the CPU core, we're hearing that AMD will increase cache sizes, particularly the dedicated L2 cache size, which is expected to be 1 MB per core, doubling from the previous generations of the "Zen" microarchitecture.

Each "Zen 4" CCD is reported to be about 8 mm² smaller in die-area than the "Zen 3" CCD, or about 10% smaller. What's interesting, though, is that the sIOD (server I/O die) is smaller in size, too, estimated to measure 397 mm², compared to the 416 mm² of the "Rome" and "Milan" sIOD. This is good reason to believe that AMD has switched over to a newer foundry process, such as the TSMC N7 (7 nm), to build the sIOD. The current-gen sIOD is built on Global Foundries 12LPP (12 nm). Supporting this theory is the fact that the "Genoa" sIOD has a 50% wider memory I/O (12-channel DDR5), 50% more IFOP ports (Infinity Fabric over package) to interconnect with the CCDs, and the mere fact that PCI-Express 5.0 and DDR5 switching fabric and SerDes (serializer/deserializers), may have higher TDP; which together compel AMD to use a smaller node such as 7 nm, for the sIOD. AMD is expected to debut the EPYC "Genoa" enterprise processors in the second half of 2022.



View at TechPowerUp Main Site | Source
 
Joined
Dec 26, 2006
Messages
3,857 (0.59/day)
Location
Northern Ontario Canada
Processor Ryzen 5700x
Motherboard Gigabyte X570S Aero G R1.1 BiosF5g
Cooling Noctua NH-C12P SE14 w/ NF-A15 HS-PWM Fan 1500rpm
Memory Micron DDR4-3200 2x32GB D.S. D.R. (CT2K32G4DFD832A)
Video Card(s) AMD RX 6800 - Asus Tuf
Storage Kingston KC3000 1TB & 2TB & 4TB Corsair MP600 Pro LPX
Display(s) LG 27UL550-W (27" 4k)
Case Be Quiet Pure Base 600 (no window)
Audio Device(s) Realtek ALC1220-VB
Power Supply SuperFlower Leadex V Gold Pro 850W ATX Ver2.52
Mouse Mionix Naos Pro
Keyboard Corsair Strafe with browns
Software W10 22H2 Pro x64
"(12-channel DDR5)"

I wonder how many mem channels the desktop version will have? 2 or 4?
 
Joined
Nov 15, 2020
Messages
926 (0.62/day)
System Name 1. Glasshouse 2. Odin OneEye
Processor 1. Ryzen 9 5900X (manual PBO) 2. Ryzen 9 7900X
Motherboard 1. MSI x570 Tomahawk wifi 2. Gigabyte Aorus Extreme 670E
Cooling 1. Noctua NH D15 Chromax Black 2. Custom Loop 3x360mm (60mm) rads & T30 fans/Aquacomputer NEXT w/b
Memory 1. G Skill Neo 16GBx4 (3600MHz 16/16/16/36) 2. Kingston Fury 16GBx2 DDR5 CL36
Video Card(s) 1. Asus Strix Vega 64 2. Powercolor Liquid Devil 7900XTX
Storage 1. Corsair Force MP600 (1TB) & Sabrent Rocket 4 (2TB) 2. Kingston 3000 (1TB) and Hynix p41 (2TB)
Display(s) 1. Samsung U28E590 10bit 4K@60Hz 2. LG C2 42 inch 10bit 4K@120Hz
Case 1. Corsair Crystal 570X White 2. Cooler Master HAF 700 EVO
Audio Device(s) 1. Creative Speakers 2. Built in LG monitor speakers
Power Supply 1. Corsair RM850x 2. Superflower Titanium 1600W
Mouse 1. Microsoft IntelliMouse Pro (grey) 2. Microsoft IntelliMouse Pro (black)
Keyboard Leopold High End Mechanical
Software Windows 11
Looks to be a big step up from Zen 3. Analogous to the step up to Alder Lake for Intel.
 
Joined
Feb 21, 2006
Messages
2,236 (0.33/day)
Location
Toronto, Ontario
System Name The Expanse
Processor AMD Ryzen 7 5800X3D
Motherboard Asus Prime X570-Pro BIOS 5013 AM4 AGESA V2 PI 1.2.0.Cc.
Cooling Corsair H150i Pro
Memory 32GB GSkill Trident RGB DDR4-3200 14-14-14-34-1T (B-Die)
Video Card(s) XFX Radeon RX 7900 XTX Magnetic Air (24.10.1)
Storage WD SN850X 2TB / Corsair MP600 1TB / Samsung 860Evo 1TB x2 Raid 0 / Asus NAS AS1004T V2 20TB
Display(s) LG 34GP83A-B 34 Inch 21: 9 UltraGear Curved QHD (3440 x 1440) 1ms Nano IPS 160Hz
Case Fractal Design Meshify S2
Audio Device(s) Creative X-Fi + Logitech Z-5500 + HS80 Wireless
Power Supply Corsair AX850 Titanium
Mouse Corsair Dark Core RGB SE
Keyboard Corsair K100
Software Windows 10 Pro x64 22H2
Benchmark Scores 3800X https://valid.x86.fr/1zr4a5 5800X https://valid.x86.fr/2dey9c 5800X3D https://valid.x86.fr/b7d
"(12-channel DDR5)"

I wonder how many mem channels the desktop version will have? 2 or 4?
I think it will still be 2 and 4 channels for a HEDT line up.

The reason to avoid going more than dual channel on desktop is to keep cost low. 2 Channels of DDR5 memory already provides alot of bandwidth.
 
Joined
May 3, 2018
Messages
2,881 (1.19/day)
Looks to be a big step up from Zen 3. Analogous to the step up to Alder Lake for Intel.
AMD has said Zen 4 is the biggest architectural change to Zen since it's inception. It will be a bigger performance jump than Zen 2 -> Zen 3
 

btarunr

Editor & Senior Moderator
Staff member
Joined
Oct 9, 2007
Messages
47,279 (7.54/day)
Location
Hyderabad, India
System Name RBMK-1000
Processor AMD Ryzen 7 5700G
Motherboard ASUS ROG Strix B450-E Gaming
Cooling DeepCool Gammax L240 V2
Memory 2x 8GB G.Skill Sniper X
Video Card(s) Palit GeForce RTX 2080 SUPER GameRock
Storage Western Digital Black NVMe 512GB
Display(s) BenQ 1440p 60 Hz 27-inch
Case Corsair Carbide 100R
Audio Device(s) ASUS SupremeFX S1220A
Power Supply Cooler Master MWE Gold 650W
Mouse ASUS ROG Strix Impact
Keyboard Gamdias Hermes E2
Software Windows 11 Pro
"(12-channel DDR5)"

I wonder how many mem channels the desktop version will have? 2 or 4?
12-channel DDR5 implies 24 sub-channels. Alder Lake has 2-channel DDR5, or 4 sub-channels. So it's likely that Raphael will have the same 2-channel (4 sub-channel) DDR5 interface as Alder Lake.

1649637390523.png
 
Joined
Jun 18, 2021
Messages
2,554 (2.01/day)
The reason to avoid going more than dual channel on desktop is to keep cost low. 2 Channels of DDR5 memory already provides alot of bandwidth.

But it would be so cool...

Now that they seem to have killed regular Threadripper imagine having a X690 chipset (nice :D ) besides the expected X670/B650 with quad channel support for a couple of the higher end CPUs (like the 7700x, 7900x and 7950x or whatever the names end up being)
 

eidairaman1

The Exiled Airman
Joined
Jul 2, 2007
Messages
42,450 (6.66/day)
Location
Republic of Texas (True Patriot)
System Name PCGOD
Processor AMD FX 8350@ 5.0GHz
Motherboard Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory 16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s) AMD Radeon 290 Sapphire Vapor-X
Storage Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s) NEC Multisync LCD 1700V (Display Port Adapter)
Case AeroCool Xpredator Evil Blue Edition
Audio Device(s) Creative Labs Sound Blaster ZxR
Power Supply Seasonic 1250 XM2 Series (XP3)
Mouse Roccat Kone XTD
Keyboard Roccat Ryos MK Pro
Software Windows 7 Pro 64
But it would be so cool...

Now that they seem to have killed regular Threadripper imagine having a X690 chipset (nice :D ) besides the expected X670/B650 with quad channel support for a couple of the higher end CPUs (like the 7700x, 7900x and 7950x or whatever the names end up being)
What would be nice is the SkT A days where the Server/Workstation CPUs were on the Same Socket as The lower models
 
Joined
Feb 20, 2019
Messages
8,330 (3.93/day)
System Name Bragging Rights
Processor Atom Z3735F 1.33GHz
Motherboard It has no markings but it's green
Cooling No, it's a 2.2W processor
Memory 2GB DDR3L-1333
Video Card(s) Gen7 Intel HD (4EU @ 311MHz)
Storage 32GB eMMC and 128GB Sandisk Extreme U3
Display(s) 10" IPS 1280x800 60Hz
Case Veddha T2
Audio Device(s) Apparently, yes
Power Supply Samsung 18W 5V fast-charger
Mouse MX Anywhere 2
Keyboard Logitech MX Keys (not Cherry MX at all)
VR HMD Samsung Oddyssey, not that I'd plug it into this though....
Software W10 21H1, barely
Benchmark Scores I once clocked a Celeron-300A to 564MHz on an Abit BE6 and it scored over 9000.
This proves that Genoa 96C/192T models are using 8C/16T CCDs, yet another nail in the coffin for the 16C/32T CCD theory.

They're not going to squeeze four CCDs in a neat line onto the SP5 package though, I'm guessing if there is no 16C CCD (why would AMD make a totally new die just for one product?) they'll just organise them in a 2x2 grid instead of a 4x1 line.

"(12-channel DDR5)"

I wonder how many mem channels the desktop version will have? 2 or 4?
There currently isn't a Threadripper for consumers, so you'll likely only see it as a Threadripper Pro in HP/Lenovo/Dell OEM board unless AlderLake-X prompts AMD to compete this generation rather than next.

In saying that, Threadripper has always been a minimum of 4-channels which was one of the main distinctions between Ryzen and Threadripper when core counts matched (so the 12C and 16C Threadrippers being otherwise pointless alongside the 3900X, 3950X, 5900X, 5950X)
 
Joined
Oct 12, 2005
Messages
709 (0.10/day)
This proves that Genoa 96C/192T models are using 8C/16T CCDs, yet another nail in the coffin for the 16C/32T CCD theory.

They're not going to squeeze four CCDs in a neat line onto the SP5 package though, I'm guessing if there is no 16C CCD (why would AMD make a totally new die just for one product?) they'll just organise them in a 2x2 grid instead of a 4x1 line.


There currently isn't a Threadripper for consumers, so you'll likely only see it as a Threadripper Pro in HP/Lenovo/Dell OEM board unless AlderLake-X prompts AMD to compete this generation rather than next.

In saying that, Threadripper has always been a minimum of 4-channels which was one of the main distinctions between Ryzen and Threadripper when core counts matched (so the 12C and 16C Threadrippers being otherwise pointless alongside the 3900X, 3950X, 5900X, 5950X)
Genoa (and Genoa-X) was always suppose to be 12 8 cores CCD. It's Bergamo that is suppose to have the 16cores CCD. Those will be Zen4 core with less caches (rumours is smaller L2 and L3). Those will only be sold to Cloud provider if the rumors is true for now.

The rumors is also those 16c ccd will be the Little cores of Zen5 or at least based on those.

I don't think desktop right now need more than 2 channels, I think on die Cache will have much more significant performance gain overall for most memory sensitive application. Like people said, you have effectively 4 subchannel to interleave your memory request on DDR5 and that should be enough for standard desktop workload. DDR5 also allow higher capacity DIMM so we should be fine there too.

Soon the cost of adding 3d-vCache on the die will probably be smaller than making a motherboard with 2 extra channel+ having to buy 2 extra dimm.
 
Top