Overclock.net › Forums › Industry News › Rumors and Unconfirmed Articles › [WCCF] AMD Pirate Islands : R9 300 Series Roadmap Leak
New Posts  All Forums:Forum Nav:

[WCCF] AMD Pirate Islands : R9 300 Series Roadmap Leak - Page 16

post #151 of 195
Quote:
Originally Posted by Usario View Post

Please reread my post. Just because you can divide two numbers and get an irrational answer, does not mean these two numbers are divisible. The quotient has to be an integer for the numbers to be considered divisible.

To answer your question, the entire back-end (including memory, ROPs, other stuff) is tied in together in a unit for sorts. If the memory bus width is not divisible by the ROP count that means they can't possibly be in such a unit, since you can't have, say, 5.33... ROPs in a unit. So either the specs are an amateur fake or the entire back end has been re-engineered and the ROPs are decoupled from the memory bus. Every time this has ever happened, it turned out to be the former -- the specs were just BS from someone who knew nothing about GPU architecture. But we'll see.


Stop logicing them so hard, their brains might asplode.
LEGION
(15 items)
 
  
CPUMotherboardGraphicsRAM
I7 6700K ASUS Maximus VIII Impact EVGA GTX TITAN X G.skill 16gb 3200 ddr4 
Hard DriveHard DriveHard DriveCooling
Samsung 840 pro 250gb Samsung 840 evo 250gb Samsung 840 evo 250gb Ice kings magic. 
OSMonitorKeyboardPower
WIN 10 Wasabi Mango 42" 4k Corsair k70 EVGA 1000w P2 
CaseMouseAudio
Caselabs Mercury S3 Razer naga :( sennheiser HD 558 
  hide details  
Reply
LEGION
(15 items)
 
  
CPUMotherboardGraphicsRAM
I7 6700K ASUS Maximus VIII Impact EVGA GTX TITAN X G.skill 16gb 3200 ddr4 
Hard DriveHard DriveHard DriveCooling
Samsung 840 pro 250gb Samsung 840 evo 250gb Samsung 840 evo 250gb Ice kings magic. 
OSMonitorKeyboardPower
WIN 10 Wasabi Mango 42" 4k Corsair k70 EVGA 1000w P2 
CaseMouseAudio
Caselabs Mercury S3 Razer naga :( sennheiser HD 558 
  hide details  
Reply
post #152 of 195
Hawaii:
Hub Switch (PCI Express 3.0 / Dual DMA engine / VCE+UVD+TruAudio / XDMA / Display Controllers)
which connects to
Eight 64-bit Memory Controllers and Eight 128 KB L2 caches the split happens here.

First Split:
Each L2 cache
which connects to
two Render Back Ends
which all Render Back Ends connect to each other and to each of the Rasterizer's Hierarchical Z unit.

Second Split:
All L2 caches
which connects to
To the Bi-directional crossbar switch.

Bi-directional Crossbar Switch:
Connects Global Data Share, the 8 ACE and 1 GCP, Work distributor and CUs together.

Possible changes to Pirate Islands that differ from Volcanic Islands:
- Removal of the Graphics Command Processor.
- Removal of the Geometry Engine and Rasterizer.
- Implementation of the Unified Compute Shader Engine.
- Implementation of several HBM interfaces.
- New doorbell ACE units? Doorbell = https://en.wikipedia.org/wiki/Interrupt

Hawaii vs Bermuda

8 ACEs + 1 GCP vs 8 ACE F32 RISC units
1 Work Distributor vs 1 Work Distributor
4 Shader Engine vs 4 Compute Shader Engines
4 GEs + 4 RAS vs 1 Unified Compute GE/RAS
44 CUs vs 64 CUs
8 128KB L2s vs 4 512KB L2s
16 RBEs/64 ROPs (8 per L2) vs 16 RBEs/64 ROPs (16 per L2)
8 GDDR5 Memory Controllers vs 4 HBM Memory Controllers
512-bit Interface (Off-die memory chips) vs 4096-bit Interface (On-interposer stacked memory chips)

http://i.imgur.com/l29o6zV.png

Pirate Island (1.0/1.1) GPUs/APUs:
Bermuda
Maui
Iceland
Fiji
Tonga
Treasure
Basilisk
Carrizo
Nolan
Beema
Mullins
Edited by Seronx - 4/12/14 at 8:29pm
AMD FX ~Seronx
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX-9800P Acer Wasp R7 M440 SK Hynix HMA41GS6AFR8N-TF 
Hard DriveHard DriveOptical DriveCooling
KINGSTON RBU-SNS8152S3128GG2 TOSHIBA MQ01ABD100 HL-DT-ST DVDRAM GUE1N Stock 
OSMonitorKeyboardPower
Microsoft Windows 10 Home Build 14393 Viewsonic XG2401 24 Hz-144 Hz Ducky Channel Shine 3 Stock 65W 
CaseMouseMouse PadAudio
Acer Exoskeleton Steelseries Rival 300 Razer Megasoma AMD-Realtek ALC255 
  hide details  
Reply
AMD FX ~Seronx
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX-9800P Acer Wasp R7 M440 SK Hynix HMA41GS6AFR8N-TF 
Hard DriveHard DriveOptical DriveCooling
KINGSTON RBU-SNS8152S3128GG2 TOSHIBA MQ01ABD100 HL-DT-ST DVDRAM GUE1N Stock 
OSMonitorKeyboardPower
Microsoft Windows 10 Home Build 14393 Viewsonic XG2401 24 Hz-144 Hz Ducky Channel Shine 3 Stock 65W 
CaseMouseMouse PadAudio
Acer Exoskeleton Steelseries Rival 300 Razer Megasoma AMD-Realtek ALC255 
  hide details  
Reply
post #153 of 195
You really think HBM will be ready for Pirate?
New and Shiny
(18 items)
 
  
CPUMotherboardGraphicsRAM
Rynze 7 1700 ASUS ROG Crosshair VI Hero Sapphire HD7950 G.SKILL TridentZ F4-3200C14D 
Hard DriveHard DriveHard DriveHard Drive
Kingston HyperX 3K Crucial MX300 Western Digital Black Western Digital Green 
Hard DriveCoolingOSMonitor
Western Digital Red Noctua NH-U14S Windows 10 Pro Dell U2414H 
MonitorKeyboardPowerCase
Dell P2414H Ducky One Corsair RM650x NZXT H440 White 
MouseAudio
Logitech G502 Proteus Spectrum Xonar DX 
  hide details  
Reply
New and Shiny
(18 items)
 
  
CPUMotherboardGraphicsRAM
Rynze 7 1700 ASUS ROG Crosshair VI Hero Sapphire HD7950 G.SKILL TridentZ F4-3200C14D 
Hard DriveHard DriveHard DriveHard Drive
Kingston HyperX 3K Crucial MX300 Western Digital Black Western Digital Green 
Hard DriveCoolingOSMonitor
Western Digital Red Noctua NH-U14S Windows 10 Pro Dell U2414H 
MonitorKeyboardPowerCase
Dell P2414H Ducky One Corsair RM650x NZXT H440 White 
MouseAudio
Logitech G502 Proteus Spectrum Xonar DX 
  hide details  
Reply
post #154 of 195
Quote:
Originally Posted by geoxile View Post

You really think HBM will be ready for Pirate?
January 2013 / HBM:
Quote:
...low production expected 1H of 2014, ramping to volume 2H of 2014.

December 2013 / HBM:
Quote:
Sample shipments of the HBM will start in the first half of 2014, while the chip maker will begin the mass production in the second half.

Another December 2013 / HBM:
Quote:
Jointly developed with U.S.-based Advanced Micro Devices, the new product combines four 20 nanometer-class dynamic random access memory (DRAM) under the TSV technology, which allows the DRAMs to be connected with higher electrical efficiency.

SK hynix said the TSV-based chip can be applied to devices that require high graphic performance, and it can also be used in super computers and servers. It said the mass production of the cutting-edge chips will begin in the second half of 2014.

Extra
Quote:
the HBM joint development announcement from AMD and Hynix at the RTI 3D ASIP meeting in Burlingame, CA. Bryan Black, Sr Fellow and 3D program manager at AMD noted that while die stacking has caught on in FPGAs and image sensors “..there is nothing yet in mainstream computing CPUs, GPUs or APUs” but that “HBM (high bandwidth memory) will change this.” Black continued, “Getting 3D going will take a BOLD move and AMD is ready to make that move.” Black announced that AMD is co-developing HBM with SK Hynix which is currently sampling the HBM memory stacks and that AMD “…is ready to work with customers.”

March 2014 / HBM:
Quote:
High Bandwidth Memory (HBM) is a JEDEC standard focused on supporting the memory bandwidth needs of the next generation 100G networking systems. It achieves very high bandwidth using a fine-pitch interconnect between the memory device and the host chip. Northwest Logic has verified and released its HBM Controller Core using memory models from Hynix. The Hynix HBM devices will be available in production in Q4 2014. “SK Hynix anticipates significant customer interest in HBM due to its high performance, low power, and cost effectiveness. We are delighted that Northwest Logic already provides HBM support ahead of time so our mutual customers can get an early start on their designs”, stated Sunny Khang, Director of DRAM Technical Marketing at SK hynix America

http://nwlogic.com/products/docs/HBM_DRAM_Controller_Core.pdf
Edited by Seronx - 4/13/14 at 12:30am
AMD FX ~Seronx
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX-9800P Acer Wasp R7 M440 SK Hynix HMA41GS6AFR8N-TF 
Hard DriveHard DriveOptical DriveCooling
KINGSTON RBU-SNS8152S3128GG2 TOSHIBA MQ01ABD100 HL-DT-ST DVDRAM GUE1N Stock 
OSMonitorKeyboardPower
Microsoft Windows 10 Home Build 14393 Viewsonic XG2401 24 Hz-144 Hz Ducky Channel Shine 3 Stock 65W 
CaseMouseMouse PadAudio
Acer Exoskeleton Steelseries Rival 300 Razer Megasoma AMD-Realtek ALC255 
  hide details  
Reply
AMD FX ~Seronx
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX-9800P Acer Wasp R7 M440 SK Hynix HMA41GS6AFR8N-TF 
Hard DriveHard DriveOptical DriveCooling
KINGSTON RBU-SNS8152S3128GG2 TOSHIBA MQ01ABD100 HL-DT-ST DVDRAM GUE1N Stock 
OSMonitorKeyboardPower
Microsoft Windows 10 Home Build 14393 Viewsonic XG2401 24 Hz-144 Hz Ducky Channel Shine 3 Stock 65W 
CaseMouseMouse PadAudio
Acer Exoskeleton Steelseries Rival 300 Razer Megasoma AMD-Realtek ALC255 
  hide details  
Reply
post #155 of 195
Quote:
Originally Posted by Usario View Post

I just don't understand why you have to be so persistent. I understand you are from the Netherlands, perhaps you are not familiar with the meaning of this word in English. If x/y != an integer, x is not divisible by y. Yes, you *can* divide them (and get a decimal or irrational number), but they are not considered to be divisible.
http://translate.google.nl/m/translate#nl/en/deelbaar

I do understand that a non whole number wouldn't make sense really all I'm saying that you can divide one thing by another even if it is out of context.
post #156 of 195
Quote:
Originally Posted by Seronx View Post

January 2013 / HBM:
December 2013 / HBM:
Another December 2013 / HBM:
Extra
March 2014 / HBM:
http://nwlogic.com/products/docs/HBM_DRAM_Controller_Core.pdf

My god, I hope you are correct. HBM would be so sweet, as my 79xx are looking for an upgrade, and I'm not even going to consider the current 290's, since I don't think a basically beefed up Tahiti is much of an upgrade.
On another note, I'm going to rep you for your very knowledgable posts - I've seen you posting these very intelligent assumptions/speculations for a while in many different threads and I think you deserve it. thumb.gif
    
CPUMotherboardGraphicsRAM
x5650 Asus sabertooth x58 MSI GTX 970 Gaming Corsair Dominator 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 3 WD Green SATA3 Seagate Barracuda SATA2 WD Green SATA3 
Hard DriveOptical DriveCoolingOS
WD Green SATA3 LITE-on iHos-104 H100 Push/pull Win8.1 Pro x64 
MonitorMonitorKeyboardPower
2x BenQ G2222HDL 1080p 60hz Samsung SyncMaster SA950D 1080p 120hz CM Storm Quickfire Pro Thermaltake Toughpower 1200Watt 
CaseMouseMouse PadAudio
Bitfenix Shinobi XL Razer Deathadder 2013 An exclusive SteelSeries mousepad made of glass Noontec Zoro 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
x5650 Asus sabertooth x58 MSI GTX 970 Gaming Corsair Dominator 
Hard DriveHard DriveHard DriveHard Drive
OCZ Agility 3 WD Green SATA3 Seagate Barracuda SATA2 WD Green SATA3 
Hard DriveOptical DriveCoolingOS
WD Green SATA3 LITE-on iHos-104 H100 Push/pull Win8.1 Pro x64 
MonitorMonitorKeyboardPower
2x BenQ G2222HDL 1080p 60hz Samsung SyncMaster SA950D 1080p 120hz CM Storm Quickfire Pro Thermaltake Toughpower 1200Watt 
CaseMouseMouse PadAudio
Bitfenix Shinobi XL Razer Deathadder 2013 An exclusive SteelSeries mousepad made of glass Noontec Zoro 
  hide details  
Reply
post #157 of 195
Quote:
Originally Posted by maarten12100 View Post

http://translate.google.nl/m/translate#nl/en/deelbaar

I do understand that a non whole number wouldn't make sense really all I'm saying that you can divide one thing by another even if it is out of context.

Just because you can divide two numbers and get an irrational quotient does not mean they are divisible. Yes, you can divide them, but they are not divisible.

I'm done arguing over middle school level mathematical semantics.
Kalki
(25 items)
 
Alienware
(18 items)
 
ASUS A53Z
(13 items)
 
CPUMotherboardGraphicsRAM
AMD FX-8320 @ 4.73GHz Gigabyte 990FXA-UD3 Radeon HD 7950 @ 1200/1800 8GB Samsung 30nm DDR3 @ 2000MHz 11-11-11-28-1T 
Hard DriveHard DriveHard DriveOptical Drive
128GB Crucial M4 1TB Seagate Barracuda 7200.12 2TB Seagate Barracuda ST 7200 RPM who cares 
CoolingCoolingCoolingCooling
XSPC Raystorm XSPC Razor HD 7970 XSPC EX240 Swiftech MCP50X 
CoolingCoolingCoolingCooling
Black Ice GT Stealth 240 2x XSPC Xinruilian 1650rpm 2x Yate Loon Slim 1800rpm Alphacool Light Tower 
OSOSMonitorKeyboard
Windows 7 Gentoo GNU/Linux Dell UltraSharp U2412M CM Storm Trigger MX Brown 
PowerCaseMouse
Corsair AX750 Corsair Carbide 300R Logitech G400 
CPUMotherboardGraphicsRAM
AMD OPTERON BULLDOZER 16-CORE 2GHZ (32GHZ TOTAL) ALIENWARE 3+1 PHASE ITX GAMING BOARD 4GB NVIDIA GEFORCE GT 430 32GB GAMING DDR3 800MHZ CL13 
Hard DriveOptical DriveCoolingOS
2TB 5400RPM GAMING HDD GAMING BLU RAY BURNER ONE GAMING CASE FAN UBUNTU W/ UNITY (I AM 1337 H4X0R) 
MonitorKeyboardPowerCase
HD-READY 24" 1366X768 PENTILE TN PANEL GAMING M... ALIENWARE TACTX UBER 1337 BACKLIT RUBBER MEMBRA... OFF-BRAND 200W GAMING PSU; 65% EFFICIENCY  ALIENWARE GAMING CASE WITH THE COOL GLOWING ALIEN 
MouseMouse PadAudioAudio
ALIENWARE TACTX GAMING MOUSE ALIENWARE MOUSEPAD IT'S DESIGNED FOR GAMING AND... BEATS AUDIO 1337 ALIENWARE TACTX 8-CHANNEL GAMING HEADSET/M... 
OtherOther
16 CORES!!!! 4GB VRAM!!!! FASTER THAN 3960X + 7... ALIENWARE GAMING CARPET 
CPUMotherboardGraphicsRAM
AMD A6-3420M OC 2.2GHz / 3GHz Turbo 1.10625v ASUS A53Z AMD Radeon HD 6520G 6GB DDR3 1333MHz 
Hard DriveOptical DriveCoolingOS
320GB WD Scorpio Black yes. really good Windows 7 Home Premium 64-bit 
OSMonitorKeyboardPower
Fedora GNU/Linux 1366x768 LED-backlit TN panel Decent + numpad ~5hr 6-cell li-ion 
Audio
Altec Lansing 
  hide details  
Reply
Kalki
(25 items)
 
Alienware
(18 items)
 
ASUS A53Z
(13 items)
 
CPUMotherboardGraphicsRAM
AMD FX-8320 @ 4.73GHz Gigabyte 990FXA-UD3 Radeon HD 7950 @ 1200/1800 8GB Samsung 30nm DDR3 @ 2000MHz 11-11-11-28-1T 
Hard DriveHard DriveHard DriveOptical Drive
128GB Crucial M4 1TB Seagate Barracuda 7200.12 2TB Seagate Barracuda ST 7200 RPM who cares 
CoolingCoolingCoolingCooling
XSPC Raystorm XSPC Razor HD 7970 XSPC EX240 Swiftech MCP50X 
CoolingCoolingCoolingCooling
Black Ice GT Stealth 240 2x XSPC Xinruilian 1650rpm 2x Yate Loon Slim 1800rpm Alphacool Light Tower 
OSOSMonitorKeyboard
Windows 7 Gentoo GNU/Linux Dell UltraSharp U2412M CM Storm Trigger MX Brown 
PowerCaseMouse
Corsair AX750 Corsair Carbide 300R Logitech G400 
CPUMotherboardGraphicsRAM
AMD OPTERON BULLDOZER 16-CORE 2GHZ (32GHZ TOTAL) ALIENWARE 3+1 PHASE ITX GAMING BOARD 4GB NVIDIA GEFORCE GT 430 32GB GAMING DDR3 800MHZ CL13 
Hard DriveOptical DriveCoolingOS
2TB 5400RPM GAMING HDD GAMING BLU RAY BURNER ONE GAMING CASE FAN UBUNTU W/ UNITY (I AM 1337 H4X0R) 
MonitorKeyboardPowerCase
HD-READY 24" 1366X768 PENTILE TN PANEL GAMING M... ALIENWARE TACTX UBER 1337 BACKLIT RUBBER MEMBRA... OFF-BRAND 200W GAMING PSU; 65% EFFICIENCY  ALIENWARE GAMING CASE WITH THE COOL GLOWING ALIEN 
MouseMouse PadAudioAudio
ALIENWARE TACTX GAMING MOUSE ALIENWARE MOUSEPAD IT'S DESIGNED FOR GAMING AND... BEATS AUDIO 1337 ALIENWARE TACTX 8-CHANNEL GAMING HEADSET/M... 
OtherOther
16 CORES!!!! 4GB VRAM!!!! FASTER THAN 3960X + 7... ALIENWARE GAMING CARPET 
CPUMotherboardGraphicsRAM
AMD A6-3420M OC 2.2GHz / 3GHz Turbo 1.10625v ASUS A53Z AMD Radeon HD 6520G 6GB DDR3 1333MHz 
Hard DriveOptical DriveCoolingOS
320GB WD Scorpio Black yes. really good Windows 7 Home Premium 64-bit 
OSMonitorKeyboardPower
Fedora GNU/Linux 1366x768 LED-backlit TN panel Decent + numpad ~5hr 6-cell li-ion 
Audio
Altec Lansing 
  hide details  
Reply
post #158 of 195
Quote:
Originally Posted by Usario View Post

Just because you can divide two numbers and get an irrational quotient does not mean they are divisible. Yes, you can divide them, but they are not divisible.

They don't think it be like it is, but it do.

lachen.gif
Power Bac G5
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 6950X EVGA GTX 1080 Ti GSkill 32GB 4133Mhz Samsung 960 Pro 1TB 
CoolingMonitor
Corsair H110i ASUS PG278Q 
  hide details  
Reply
Power Bac G5
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 6950X EVGA GTX 1080 Ti GSkill 32GB 4133Mhz Samsung 960 Pro 1TB 
CoolingMonitor
Corsair H110i ASUS PG278Q 
  hide details  
Reply
post #159 of 195
Quote:
Originally Posted by Usario View Post

To answer your question, the entire back-end (including memory controllers, ROPs, other stuff) is tied in together in a unit of sorts. If the memory bus width is not divisible by the ROP count that means they can't possibly be in such a unit, since you can't have, say, 5.33... ROPs in a unit. So either the specs are an amateur fake or the entire back end has been re-engineered and the ROPs are decoupled from the memory bus. Every time this has ever happened, it turned out to be the former -- the specs were just BS from someone who knew nothing about GPU architecture. But we'll see.
Quote:
Originally Posted by Usario View Post

512 is not divisible by 96.

In the other unusual situations that Seronx mentioned, it at least made sense. 384 is divisible by 32 and 256 is divisible by 8.
Quote:
Originally Posted by PureBlackFire View Post

Well, whether it's ROPs, MC's, ACE or CU's, they are all going to be whole numbers of each (likely in amounts divisible into even numbers) right? So 96 ROP on a 512 bit bus = impossible and a lazy rumor at that. 5.33333333333.... next rumor please.

Is there a document, article, or even just an explanation from one of you, verifying that the memory bus width has to be divisible, as a whole number, by the number of ROPs?

According to the review of Tahiti on Anandtech, the ROPs are partially decoupled from the L2 cache and memory controllers, but there's no mention of the extent of the decoupling.
Quote:
Originally Posted by Ryan Smith (Anandtech) View Post

Looking beyond the frontend and shader cores, we’ve seen a very interesting reorganization of the rest of the GPU as opposed to Cayman. Keeping in mind that AMD’s diagrams are logical diagrams rather than physical diagrams, the fact that the ROPs on Tahiti are not located near the L2 cache and memory controllers in the diagram is not an error. The ROPs have in fact been partially decoupled from the L2 cache and memory controllers, which is also why there are 8 ROP partitions but only 6 memory controllers. Traditionally the ROPs, L2 cache, and memory controllers have all been tightly integrated as ROP operations are extremely bandwidth intensive, making this a very unusual design for AMD to use.
     
CPUMotherboardGraphicsRAM
Intel Core i7 4930K @ 4.2Ghz (42x100) 1.21V ASUS Rampage IV Extreme 2x3GB MSI Radeon HD 7970 OC @ 1075Mhz/6100 4x4GB G.SKILL ARES DDR3-1866 (Blue) 
Hard DriveHard DriveOptical DriveOptical Drive
2x256GB Crucial M4 (RAID 0) 2x3TB Seagate Barracuda 7200.14 (RAID 1) 12X Samsung SH-B123L/BSBP BD Combo 2.4X Toshiba SD-H802A HD DVD-ROM (IDE) 
CoolingOSMonitorKeyboard
Cooler Master TPC-812 w/ Dual Gentle Typhoon AP15 Windows 10 Pro 64 bit 21" NEC AccuSync 120 (CRT) Ducky DK9008G2-BELLB (Cherry MX Brown) 
PowerCaseMouseMouse Pad
750W EVGA SuperNOVA NEX750B NZXT Switch 810 (Black) Razer Boomer Speed (Ball) Razer Goliathus 
AudioOther
FiiO E10 1.5kVA APC J35B Power Conditioner/UPS 
CPUMotherboardGraphicsRAM
Dual Xeon X5650 @ 3.9Ghz (195x20) 1.3375V EVGA Classified SR-2 1280MB EVGA GeForce GTX 470 6x4GB Team Group Xtreem Dark DDR3-1600 
Hard DriveCoolingOSPower
160GB Intel 320 XSPC RayStorm | Danger Den DD-GTX470 | Swiftech... Ubuntu 14.10 64 bit 1000W Antec CP (CPX) 
Case
XIGMATEK ELYSIUM (Black) 
  hide details  
Reply
     
CPUMotherboardGraphicsRAM
Intel Core i7 4930K @ 4.2Ghz (42x100) 1.21V ASUS Rampage IV Extreme 2x3GB MSI Radeon HD 7970 OC @ 1075Mhz/6100 4x4GB G.SKILL ARES DDR3-1866 (Blue) 
Hard DriveHard DriveOptical DriveOptical Drive
2x256GB Crucial M4 (RAID 0) 2x3TB Seagate Barracuda 7200.14 (RAID 1) 12X Samsung SH-B123L/BSBP BD Combo 2.4X Toshiba SD-H802A HD DVD-ROM (IDE) 
CoolingOSMonitorKeyboard
Cooler Master TPC-812 w/ Dual Gentle Typhoon AP15 Windows 10 Pro 64 bit 21" NEC AccuSync 120 (CRT) Ducky DK9008G2-BELLB (Cherry MX Brown) 
PowerCaseMouseMouse Pad
750W EVGA SuperNOVA NEX750B NZXT Switch 810 (Black) Razer Boomer Speed (Ball) Razer Goliathus 
AudioOther
FiiO E10 1.5kVA APC J35B Power Conditioner/UPS 
CPUMotherboardGraphicsRAM
Dual Xeon X5650 @ 3.9Ghz (195x20) 1.3375V EVGA Classified SR-2 1280MB EVGA GeForce GTX 470 6x4GB Team Group Xtreem Dark DDR3-1600 
Hard DriveCoolingOSPower
160GB Intel 320 XSPC RayStorm | Danger Den DD-GTX470 | Swiftech... Ubuntu 14.10 64 bit 1000W Antec CP (CPX) 
Case
XIGMATEK ELYSIUM (Black) 
  hide details  
Reply
post #160 of 195
Quote:
Originally Posted by Assimilator87 View Post

Is there a document, article, or even just an explanation from one of you, verifying that the memory bus width has to be divisible, as a whole number, by the number of ROPs?
2 RBES = 1 L2 = 1 Memory Controller.
Quote:
Originally Posted by Assimilator87 View Post

According to the review of Tahiti on Anandtech, the ROPs are partially decoupled from the L2 cache and memory controllers, but there's no mention of the extent of the decoupling.
The RBEs and L2 are still connected but the L2 and the memory controller can be decoupled via a switch.

96 ROPs = 768-bits or more
32 ROPs = 256-bits or more
8 ROPs = 64-bits or more.

There must always be 1 L2 to 1 Memory Controller but there can also be 1 L2 to 1.5 Memory Controllers or 1 L2 to 2 Memory Controllers and so on.

Tahiti has 8 RBEs, which has a 2:1 ratio to L2, that means there are 4 L2 caches, the 4 L2 caches are then connected to a switch. The switch then must connect to 4 memory controllers, 6 memory controllers, or 8 memory controllers.

A memory controller is 64-bits in width, 4 x 64 = 256, 6 x 64 = 384. 8 x 64 = 512.
Edited by Seronx - 4/13/14 at 11:16am
AMD FX ~Seronx
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX-9800P Acer Wasp R7 M440 SK Hynix HMA41GS6AFR8N-TF 
Hard DriveHard DriveOptical DriveCooling
KINGSTON RBU-SNS8152S3128GG2 TOSHIBA MQ01ABD100 HL-DT-ST DVDRAM GUE1N Stock 
OSMonitorKeyboardPower
Microsoft Windows 10 Home Build 14393 Viewsonic XG2401 24 Hz-144 Hz Ducky Channel Shine 3 Stock 65W 
CaseMouseMouse PadAudio
Acer Exoskeleton Steelseries Rival 300 Razer Megasoma AMD-Realtek ALC255 
  hide details  
Reply
AMD FX ~Seronx
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX-9800P Acer Wasp R7 M440 SK Hynix HMA41GS6AFR8N-TF 
Hard DriveHard DriveOptical DriveCooling
KINGSTON RBU-SNS8152S3128GG2 TOSHIBA MQ01ABD100 HL-DT-ST DVDRAM GUE1N Stock 
OSMonitorKeyboardPower
Microsoft Windows 10 Home Build 14393 Viewsonic XG2401 24 Hz-144 Hz Ducky Channel Shine 3 Stock 65W 
CaseMouseMouse PadAudio
Acer Exoskeleton Steelseries Rival 300 Razer Megasoma AMD-Realtek ALC255 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Rumors and Unconfirmed Articles
Overclock.net › Forums › Industry News › Rumors and Unconfirmed Articles › [WCCF] AMD Pirate Islands : R9 300 Series Roadmap Leak