Thursday, August 3rd 2023
PowerColor AMD Radeon RX 7800 XT Pictured, Confirmed Based on "Navi 32"
PowerColor inadvertently released the first pictures of its AMD Radeon RX 7800 XT Red Devil graphics card. These pictures confirm that the RX 7800 XT is based on a maxed out version of the "Navi 32" GPU, and not the compact "Navi 31" powering the limited edition RX 7900 GRE. The "Navi 32" is a chiplet-based GPU, just like the "Navi 31," albeit smaller. Its 5 nm GCD (graphics compute die) physically features 60 RDNA3 compute units, which work out to 3,840 stream processors, 120 AI accelerators, 60 Ray accelerators, 192 TMUs, and possibly 128 ROPs. This GCD is surrounded by four 6 nm MCDs (memory cache dies), which each has a 16 MB segment of the GPU's 64 MB Infinity Cache memory, and make up its 256-bit GDDR6 memory interface.
The specs sheet put out by PowerColor confirms that the RX 7800 XT maxes out the "Navi 32," enabling all 60 CUs, and the chip's full 256-bit memory interface, to drive 16 GB of memory. The RX 7800 XT uses 18 Gbps memory speed, and hence has 576 GB/s of memory bandwidth at its disposal. The PowerColor RX 7800 XT Red Devil has dual-BIOS, and assuming the "standard/silent" BIOS runs the card at AMD reference clock speeds, we're looking at Game clocks of 2210 MHz, and 2565 MHz boost. The Red Devil draws power from a dual 8-pin PCIe power connector set up (375 W max); the cooler is visibly smaller than the one on the company's RX 7900 series Red Devil cards. A 16+2 phase VRM powers the card. With pictures of the card out, we expect a global product launch within the next 30 days.
Source:
VideoCardz
The specs sheet put out by PowerColor confirms that the RX 7800 XT maxes out the "Navi 32," enabling all 60 CUs, and the chip's full 256-bit memory interface, to drive 16 GB of memory. The RX 7800 XT uses 18 Gbps memory speed, and hence has 576 GB/s of memory bandwidth at its disposal. The PowerColor RX 7800 XT Red Devil has dual-BIOS, and assuming the "standard/silent" BIOS runs the card at AMD reference clock speeds, we're looking at Game clocks of 2210 MHz, and 2565 MHz boost. The Red Devil draws power from a dual 8-pin PCIe power connector set up (375 W max); the cooler is visibly smaller than the one on the company's RX 7900 series Red Devil cards. A 16+2 phase VRM powers the card. With pictures of the card out, we expect a global product launch within the next 30 days.
91 Comments on PowerColor AMD Radeon RX 7800 XT Pictured, Confirmed Based on "Navi 32"
That implies that the 4070, 6800 XT and 3080 are 4K cards by the graph below but it's skewed by very high FPS in Doom Eternal as well as Battlefield and a few others. So I've generally targetted 75fps on a mix of games like this as a reasonable target to account for that, which make the 3090, 4070 Ti and 7900 XT the "real" 4K cards. If the 7800 XT somehow slots in above the 6900 XT then IMO it qualifies.
I use a 6800 XT at 1440p and while the average Minimum at 97 FPS is quite a bit higher than my arbitrary 75, there's one game (Atomic Heart) that already doesn't get 60 FPS min. But it's just one and I can reduce a setting to reach it if needed.
- 7.5 pJ/bit *20 Gbps * 384 bits = 57.6 W
- 0.4 pJ/bit *5.3 TB/s * 8 bits/byte = 17 W
- 2 W per device* 12 devices = 24 W
This yields a GCD power consumption of about 257 W. The actual figures are probably a little higher for the GCD and lower for the off-chip interface as the memory interface is unlikely to see 100% utilization because of the 96 MB last level cache. Now, even though there will be parts of Navi 32 that consume about the same power as in Navi 31, e.g. the front-end, we don't know their power consumption. Therefore, we can estimate Navi 32 power consumption as the sum of the following:- 7.5 pJ/bit *18 Gbps * 256 bits = 34.6 W
- 0.4 pJ/bit *5.3 TB/s * (2/3)*8 bits/byte = 11.3 W
- 2 W per device* 8 devices = 16 W
- (60/96)*257.4 = 160.9 W for the GCD
This comes to about 223 W for Navi 32 if the clocks are the same as Navi 31.www.techpowerup.com/311978/amd-confirms-new-enthusiast-class-radeon-7000-series-graphics-cards-this-quarter
This is the article recently somewhat confirming or speculating that the 7950 will exist…Still looking for older article on here that talked about 7900 xtx swinging for 4090.
Until Ampere, >$1000 halo cards would get released and most of us would go, "Cool. Anyway..." Now there's this tacit expectation of 4k60U for anything branded x7xx or higher. But now that x9xx performance has been normalized, big new releases keep pushing the envelope so the halo buyers feel like they got their money's worth. Which means the high end buyers don't get 4k60U anymore, and stuff even lower down the stack gets slagged off as trash when it doesn't meet similarly inflated performance targets. An x7xx card shouldn't sell a single unit at $600 (but witness the 4070) or pull over 200W (hello 3070). Yet here we are, because gamers and eye candy are like kids in a candy store with a no-limit gift card.
It will probably perform like slightly overclocked RX 6800 at best. I doubt that it will match 6800XT
Remember RX 7600 has same CU as 6600XT/6650XT.... and 6650XT perform almost same as 7600....
Spec´s look nice "
albeit" i should buy a Geefarce to compliment my screens G-sync, butt i can ignore them if the price is low nuff.ALso, 7800XT has Game clocks of 2210 MHz, and 2565 MHz boost according to article which does not look high enough to make up for CU difference (6800XT has 20% more cores)
It will barely match 6800XT....