Bit of testing to get the low speed and idle correct. It seems i have a 2 stage idle. I have messed around for 4 tanks and i couldn't get it run for a whole tank without cutting out. Sometimes i feel like the idle was too rich or too low. I have tried multiple different things throughout the video. ... https://www.youtube.com/watch?v=uoQSVIg6iYI
Test System Spec:
AMD Ryzen 9 5900X
Asus Crosshair VIII Hero
Patriot Viper Steel 4400C19
Gigabyte RX 6900XT
Integral 120GB SSD
Super Flower Leadex 1300W
Water Cooling:
EK supremacy evo
XSPC Radeon Pro Duo Full cover water block
Watercool MO RA 360LT
Fans are like from a corsair H100 SP120 grey fans.
9 way fan splitter its 1x molex to 9x 3 pins.
Scores from this session:
Sky Diver:
https://hwbot.org/submission/4644093_jumper118_3dmark___sky_diver_radeon_rx_6900_xt_102728_marks
Firestrike:
https://hwbot.org/submission/4644847_jumper118_3dmark___fire_strike_radeon_rx_6900_xt_44581_marks
Firestrike Extreme
https://hwbot.org/submission/4644844_jumper118_3dmark___fire_strike_extreme_radeon_rx_6900_xt_30556_marks
Firestrike Ultra
https://hwbot.org/submission/4644842_jumper118_3dmark___fire_strike_ultra_radeon_rx_6900_xt_16933_marks
Time Spy:
https://hwbot.org/submission/4644838_jumper118_3dmark___time_spy_radeon_rx_6900_xt_20210_marks
Time Spy Extreme
https://hwbot.org/submission/4644837_jumper118_3dmark___time_spy_extreme_radeon_rx_6900_xt_10013_marks
Night Raid
https://hwbot.org/submission/4644096_jumper118_3dmark___night_raid_radeon_rx_6900_xt_77159_marks
Port Royal
https://hwbot.org/submission/4644834_jumper118_3dmark_port_royal_radeon_rx_6900_xt_11177_marks
Wild Life
https://hwbot.org/submission/4644097_jumper118_3dmark___wild_life_radeon_rx_6900_xt_121557_marks
0:00 Quick Overview
0:47 Comparison to RX6800
1:17 System Overview
1:53 Firestrike Stock
2:47 Rage Mode
3:15 Auto Undervolt
4:00 Manual OC
6:42 Firestrike Extreme
7:17 Firestrike ultra
8:05 Manual Undervolt
10:33 Time Spy
11:30 Time Spy Extreme
12:05 Sky Diver
12:14 Night Raid
12:30 Wild Life
12:38 Port Royal
13:08 Port Royal Extreme
14:16 Tessellation Off
...
https://www.youtube.com/watch?v=r6gycbqwqxA
Here are the results all together for all motors tested in the video. The Rated number from the spec sheet will be on the left, followed by the number i have measured on the right.
GCool RC 3650 4300KV@£15.99
Rated Measured Difference
4300KV 4275KV -25KV
2.7A 7.4A 4.7A
GCool RC 3650 5200KV@£18.79
5200KV 5090KV -110KV
3.7A 7.1A 3.4A
Surpass Hobby Classic 5900KV@£19.43
5900KV 5812KV -88KV
5.2A 4.7A -0.5A
Surpass Hobby KK series 6900KV@£19.68
6900KV 6858KV -42KV
5.4A 4.8A -0.6A
None of these motors managed to hit or exceed their rated spec in terms of real KV. However they were all close enough to be considered ok, the analyser state and accuracy of +/- 3% so i would regard anything within 3% to be ok.
Clearly the two surpass motors were much better when it came to their amperage. They came in under spec which is good because the lower amperage shows they are more efficient and produce less heat.
On the GCool side things were not so cool. I felt the 4300KV is much louder and nowhere near as smooth as it should be, while the 5200KV version had a more reasonable sound level, it still fell short of the higher KV surpass motors. They both used much high current than the spec sheet says and the 5200KV motor was already warm after just this short test. It is quite funny considering it was the only one that came with a "warning hot" label :D.
Even though these motors tested were not directly comparable If you are looking at these motors on ebay, I would choose the surpass motors over the GCool motors. Especially if the are the same price.
...
https://www.youtube.com/watch?v=6ca2n28xF-w