AMD Tonga GPU Gets First Die Shot, Features a 384-bit Memory Controller - Fiji Die Size Approximated at 560mm2

The starting time dice shot of AMD's Tonga GPU was shown during the Carrizo APU presentation which gives united states of america a hint at a few interesting details. Analyzed by the forum members at Beyond3D, the die shot shows that Tonga GPU has a 384-fleck retention controller on the total chip. The other details included in the postal service testify an approximation of the Fiji GPU die which is much larger than Hawaii'south 438mm².

Prototype Credits: PCGamesHardware

AMD Tonga GPU Die Shot and Fiji GPU Size Analyzed - 384-scrap Controller and Largest GPU AMD Always Created

The Tonga GPU has been function of the GCN family since a while. It was introduced in the Radeon R9 285 graphics card which was launched a few days before the Maxwell GM204 based GeForce 900 series parts. The Radeon R9 285 feature the Tonga Pro bit which had 1792 stream processors within its 28 CU core design and had a 256-bit bus opposed to the 384-bit bus which was featured on Tahiti. AMD justified that the 256-bit bus was enough due to the color pinch characteristic on Tonga which was meant to enhance memory bandwidth efficiency by allowing the GPU to utilise the available bandwidth more efficiently hence reducing any imminent clogging. The second chip to make utilise of the Tonga core architecture was the Radeon R9 M295X. A mobile scrap fabricated exclusively for Apple'due south 5K iMac and featured 2048 stream processors alongside a 256-bit retentivity bus which happened to have 4 GB GDDR5 VRAM.

Both chips had the latest iteration of GCN architecture that enabled new technologies which previously weren't supported on AMD cards. This led many to label the Tonga GPU as the GCN 1.2 iteration while the GCN 1.i are the Hawaii and Bonaire based cards. AMD was speculated to launch the Radeon R9 285X with a full Tonga GPU just those plans were cancelled subsequently the Maxwell launch which featured meliorate performance than Tonga had to offering.

Subsequently half a yr worth of wait, we might finally exist looking at Tonga in two cards. The first 1 will be rebrands of the Radeon R9 285 and placed in the Radeon R9 380 series. The second ane will be the Radeon R9 380X carte du jour that will house the full Tonga XT variant with 2048 stream processors, 128 TMUs and 32 ROPs. The interesting role is that, in comparison to the R9 380 that features a 256-bit passenger vehicle, the R9 380X volition get a 384-bit bus as seen in the die shot posted in the latest Carrizo presentation. The bit shot shows six 64-scrap memory controllers that confirm a 384-fleck omnibus interface and volition most probable incorporate three GB of VRAM every bit opposed to 2 GB VRAM on the Radeon R9 285 (four GB custom variants).

AMD Tonga Based Radeon 300 Series Cards Specifications "Predicted":

	AMD Radeon R9 380	AMD Radeon R9 380X	AMD Radeon R9 390	AMD Radeon R9 390X
GPU Name	Antigua Pro	Antigua XT	Hawaii Pro	Hawaii XT
Die Size	359mm²	359mm²	438mm²	438mm²
Compute Units	28	32	sixty	64
Stream Processors	1792	2048	2560	2816
ROPs	32	32	forty	44
TMUs	112	128	160	176
Clock Speed	970 MHz	1000 MHz	grand MHz	1050 MHz
Texture Fill Rate	108.64 GT/southward	124.26 GT/s	160.0 GT/due south	184.viii GT/s
Height Compute (FP32)	iii.48 TFLOPs	3.97 TFLOPs	five.one TFLOPs	five.9 TFLOPs
VRAM	2 - 4 GB GDDR5	4 GB GDDR5	viii GB GDDR5	8 GB GDDR5
Retentivity Clock	5.5 - 5.seven GHz	5.vii GHz	6.0 GHz	6.0 GHz
Memory Omnibus	256-chip	256-chip	512-bit	512-bit
Bandwidth	176.2 / 182.4 GB/south	182.four GB/southward	384 GB/s	384 GB/s
TDP	190W	190W	275W	275W
Launch Cost	$199 Usa	$229 US	$329	$429

AMD Fiji GPU Die Measures Around 560mm2 - Launch Nearing

The other news is that we are close to an judge dice size of the Hawaii GPU. Aforementioned guys at Beyond3D were able to become a number shut to 560mm2 for the Republic of the fiji islands GPU which confirms that this is the largest GPU that AMD has ever created. NVIDIA's largest, the 601mm2 GM200 has already shown how far tin can NVIDIA stretch their muscles on the 28nm procedure and AMD is doing the same with a very high-performance chip geared towards high-finish enthusiasts. We know that the graphics card was shown backside airtight doors at Computex. Sapphire was ane of the AIBs showing the cards along with several other AIBs who had shown them to select press members. The launch of the carte is slated at 16th June where AMD volition concur a printing conference at E3.