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AMD Radeon RX 6000 – The real power consumption of Navi21 XT and Navi21 XL, the used memory and the


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In AMD’s Graphics Power ONLY the supply voltages of the GPU for the GFX controller (VDDCR_GFX) and SOC controller (VDDCR_SOC) are included as the most important component, as well as the supply voltages for the memory as VDDMEM and VDDCI (controller and bus). AMD thus summarizes, in short, the pure GPU power consumption (“socket power”) and that of the memory. However, this value does not contain more than this! Furthermore, according to AMD’s Thermal Design Guide, as a TGP it refers only to the thermal load, i.e. the power dissipation to be cooled in these areas of the GPU and memory surface.

To get a fair comparison with NVIDIA now, you have to look at the whole thing in its entirety. I had already done the math for the GeForce RTX 3090 and was almost right on the watt. With the actual GPU power (according to NVIDIA’s Thermal Design Guide) of 228 watts for the GeForce RTX 3090, I ended up with only 2 watts difference. I transfer now the former calculation once to the GeForce RTX 3080 for better comparability:

image.png.70d516ae4286ecee064da613a887c265.png

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Just so we are in the clear, he is basing this entirely off of one twitter post, and ignores that the 3080 has 10-40% more active transistors than a theoretical doubled 5700XT on a lesser node?

 

And then for some reason doubles the Fan/Other power for AMD over nVidia because... reasons... and states plainly that they're making assumptions about the VRM lineup.

 

I'm not calling him a liar, but that's... not really convincing.

 

Not to mention that the thus far teased Big Navi chip has dual 8-pin, which would put PCI-e power at 300w. Not that AMD hasn't bypassed PCI power spec before, but just because one guy on twitter used an incorrect term does not mean the reported number is off by 50%.

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Seems like an apples to oranges comparison, I understand what he is trying to do, but I am not 100% sure the results are accurate time will tell though as it is not too long before we know for fact.

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CPU: AMD 5950X (4.7Ghz CCD0 / 4.5Ghz CCD1)
MOTHERBOARD: ASRock X570 Aqua
RAM: TeamGroup T-FORCE XTREEM 4000Mhz 64GB (3800Mhz CL16)
GPU: EVGA 3090 FTW Ultra Gaming
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CPU: AMD RX-427BB
RAM: 16GB Corsair 1600MHZ DDR3L
SSD/NVME: WD Blue 250GB M.2 SATA SSD
NETWORK: Intel I350 -T4
CASE: HP Thin Client T730
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CPU: 2 x Xeon|E5-2696-V4 (44C/88T)
RAM: 128GB|16 x 8GB - DDR4 2400MHz (2Rx8)
MOTHERBOARD: HP Z840|Intel C612 Chipset
GPU: Nvidia Quadro P2200
HDD: 4x 16TB Toshiba MG08ACA16TE Enterprise
SSD/NVME: Intel 512GB 670p NVMe
SSD/NVME 2: Samsung 1TB 980 NVMe
SSD/NVME 3: 2x Seagate FireCuda 1TB SSD's
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A rough estimate at best.

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CPU: 5800x
MOTHERBOARD: ASUS TUF Gaming B550-Plus
RAM: XMP 3200mhz CL16
GPU: RX 6800
SOUNDCARD: Sound Blaster Z 5.1 home theater
MONITOR: 4K 65 inch TV
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Note to self: canx any orders we get from Huang for custom leather jackets, but continue our typically excellent service to Lisa Su. If Huang asks for a reason for the cancellation, tell him demand outstripped supply.

 

Edited by iamjanco
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