The Pulse is worth it, the STRIX isn't. As it (RX 5700XT) is not a top end GPU there's no reason to spend extra money on a 11 phase VRM with <250W power limit (225W per computerbase); the CPU + memory + and data on your drives isn't at stake by a motherboard failure it's just a GPU. Also power delivery for GPUs is usually actively cooled by GPU fan. Certainly not worth the rumored 100+ GBP premium (530 GBP vs 390) they were asking on OC UK.
The 7x SiC620A on Pulse is close to the 6x 70A powerstage on reference especially when you consider there's an additional powerstage. Fan speeds are tame and dual BIOS is available (1500RPM and 1000RPM per Gamersnexus but other sites have ~1700 and 1300rpm). For $10 , too.
Peak efficiency ~94%
---> confirmation on powerstage : http://www.hwbattle.com/bbs/board.ph...ic&wr_id=11484
---> the fin orientation on Pulse is also superior for front to back airflow , GPU length 254mm
XFX THICC2 is probably using same Onsemi powerstage as on RAW2 , with no more than 7 powerstages so the use of reference design's 185W power limit is no surprise https://www.computerbase.de/2019-08/xfx-radeon-rx-5700-xt-thicc2-test/#bilder https://www.expreview.com/69809.html
---> THICC2 is 295mm long per computerbase
MSI Evoke is shoddy in terms of fan speed at 2000RPM and so is ASUS STRIX. Evoke also has a weaker power delivery despite 250W power limit: 7x Onsemi NCP302155 , 55A powerstage . https://www.onsemi.com/pub/Collateral/NCP302155-D.PDF
For 1V output peaks ~92% efficiency
---> supposedly $430 , 254mm length
MSI Mech OC seems to be below 800g total weight , 230mm length:
Asrock Challenger seems to be using thicker 8mm heatpipes but no idea on the fin area or other cooling aspects (281mm length) ; power delivery is unknown as well. $410 retail.
Gigabyte Gaming OC looks to be using 80mm fans with 5 heatpipes as on RTX 2060 Super (4 heatpipe)/RTX 2070 (4 heatpipe) version. RTX 2070 Super (TU104) has 6 heatpipes. Will likely be mediocre due to direct touch heatpipe and 280mm length but is $420 which is probably more reasonable.
There's been no outright coverage on Powercolor but the base aftermarket model (Red Dragon likely) is supposed to be
$410. The larger $440 Red Devil card (5 heatpipe design , 3x 85mm fan, with 2.5 slot cooler) has 10 Onsemi 302155 powerstage design but isn't able to overclock higher than MSI Evoke per HWUnboxed. The abundance of powerstages doesn't make up for the fact that the power limit is 185W and 225W , so higher efficiency powerstages are better IMO. Per Techpowerup & computerbase it's the quietest RX 5700XT (~1100RPM for quiet BIOS) at the expense of being huge at 305mm length.
Reference AMD design is using FDMF3170 Smart Powerstages which are 70A and up to 95% efficient with 6 phases interleaved https://www.mouser.com/ds/2/308/FDMF3170-D-1222701.pdf
Cards list: https://www.techpowerup.com/gpu-spec...-5700-xt.c3339
Best bet: Sapphire Pulse , with undervolt / tune for efficiency & to reduce fan speeds further.