AMD May Have a Full Tonga GPU With 2240 Stream Processors Packed in 35 CUs - Might Launch With R300 Series

Update: It tin be confirmed based on new findings that this rumor was a mere misreport past Sisoft and was the regular Tonga variant with 28 compute units existence jumbled upwards with lxxx SPs per CU instead of the 64 SPs per CU found on the latest GPUs. Also, this rumor was far to inconsistent with the previous reports we heard about the R9 370 serial cards and rebrands bases on the Tonga die.

We know that AMD is currently preparing their latest R300 series graphics cards which volition be set to launch in Q2 2022 withal AMD has not released any information regarding their upcoming cards till at present. At that place accept been several leaks during the passing fourth dimension and we have known the R300 series by many new names, many new GPU codenames and always changing specifications which keep confusing the masses waiting for AMD'due south latest cards.

AMD's Fully Enabled Tonga Rumored To Feature 2240 Stream Processors

While I personally advise everyone to take the information regarding AMD's upcoming graphics cards with a pinch of salt, I will even so try my best to notice information from sources to provide latest updates on the upcoming generation of cards from AMD and NVIDIA. The latest information on AMD's cards was tipped by Cloudfire who has summed up his findings from Sisoftware over at Anandtech Forums. The information reveals that the Tonga GPU which was introduced on the Radeon R9 285 and Radeon R9 M295X might exist cut downward variants of a even larger core which we haven't seen yet. The Tonga XT which we expected the Radeon R9 M295X could merely have been a more optimized version of the much larger Tonga core whose details have allegedly been leaked through Sisoftware.

Nosotros know of two variants of the Tonga GPU, the first one went within the Radeon R9 285 which was meant to offer better power efficiency and improve performance than the Radeon R9 280 series as its naming suggested. What Tonga turned out to be was a more than mainstream offering that wasn't meant to push performance but offer better architectural enhancements which would be carried on to the latest iteration of the GCN core architecture. The Radeon R9 285 feature 1792 stream processors inside its 28 CU core design and had a 256-bit motorbus opposed to the 384-bit bus which was featured on Tahiti. AMD justified that the 256-bit motorcoach was plenty due to the color pinch feature on Tonga which was meant to enhance retention bandwidth efficiency by allowing the GPU to utilize the available bandwidth more efficiently hence reducing any imminent bottleneck.

The next chip to make use of the Tonga core architecture was the Radeon R9 M295X. A mobile chip made exclusively for Apple tree's 5K iMac and featured 2048 stream processors aslope a 256-chip retentiveness bus which happened to have 4 GB GDDR5 VRAM. Since the release, the R9 M295X was though to feature the flagship Tonga SKU all the same there was a flake of confusion every bit to why AMD didn't brought the top Tonga chip to the desktop market.

At that place were several reasons, with AMD meeting Apple tree's demand for their iMacs but the most famous rumor was considered to be the Maxwell launch. It was thought that AMD might have ditched the Tonga cadre for a new Radeon R9 285 series parts since it lacked behind the Maxwell GM204 core in all possible ways. The R9 285 sold for $249 The states and the upcoming Radeon R9 285X might have hit the price target of $299 United states of america. With the GTX 970 selling at $329 US at its launch, it was not good business concern for AMD to launch total Tonga at that fourth dimension.

Tonga Rebranded to Antigua? Going Inside The Radeon R9 370 Series?

A few days ago, some other rumor on the possible codenames popped up (which aren't official) showing new codenames for a few existing cards. The codenames mention Antigua which might be a rebranded Tonga family and could be going inside the Radeon R9 370 series cards. But are we withal to expect a 1792 and 2048 SPs Tonga variant in the upcoming cards?

The leak from Sisoftware shows the possibility of a third and much more than beefier Tonga chip which features 2240 stream processors arranged in 35 CUs. While the actual listing says 28 CUs, information technology could either exist ii things, this is just the regular Tonga being misread past Sisoftware or it could actually exist a 2240 stream processor variant.The chip mentioned has a 256-bit omnibus every bit indicated by the 2 GB VRAM and a clock speed of 928 MHz which is lower than the Radeon R9 285 clocked at 965 MHz. While beingness clocked lower, the menu has 40% better speed efficiency standing at ane.29MPix/s/MHz compared to 1.10MPix/s/MHz that the R9 285 featured. The possibility of a Radeon R9 370 with the 2048 SPs core and Radeon R9 370X with 2240 SPs are probable but as pointed, these rumors are rumors for a reason and null should be taken in consideration as absolute fact till proper information is available. Based on these allegations, the following cake diagrams of the several Tonga variants can be deduced:

	AMD Radeon R9 285	AMD Radeon R9 M295X	AMD Full Tonga "Alleged"
Compute Units	28	32	35
Stream Processors	1792	2048	2240
Memory Motorcoach	256-bit	256-bit	256-bit
ROPs	32	32	32
TMUs	112	128	140?
Clock Speed	918 MHz	850 MHz	928 MHz
VRAM	two GB	four GB	2-four GB
Dice Size	366mm2	366mm2	366mm2
TDP	190W	~100W	200W?