Major difference between benchmark values and real values on RTX4090 rig

[electronos]

Hi, i managed to set up a rig using 8x Rtx4090 on a AsusB250 miningExpert mother board . I'm running hashcat 6.2.6 on windows 10 os and cuda and drivers installed properly(as i can figure out). My main problem is when i run hashcat benchmark i got these values for example for hashmode 0 :

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* Hash-Mode 0 (MD5)
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Speed.#1.........:  154.7 GH/s (27.18ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#2.........:  155.1 GH/s (26.93ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#3.........:  151.7 GH/s (27.31ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#4.........:  148.9 GH/s (26.65ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#5.........:  147.2 GH/s (26.87ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#6.........:  151.0 GH/s (26.68ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#7.........:  147.4 GH/s (27.61ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#8.........:  149.9 GH/s (27.00ms) @ Accel:64 Loops:1024 Thr:512 Vec:1
Speed.#9.........:  567.2 MH/s (85.99ms) @ Accel:1024 Loops:256 Thr:8 Vec:4
Speed.#*.........:  1206.4 GH/s

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But when i run hash cat for single hash in -a 3 mode i got these results :




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Guess.Mask.......: ?1?2?2?2?2?2?2?3?3?3 [10]
Guess.Charset....: -1 ?l?d?u, -2 ?l?d, -3 ?l?d*!$@_, -4 Undefined
Guess.Queue......: 10/15 (66.67%)
Speed.#1.........: 52814.0 MH/s (2.04ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#2.........: 47936.9 MH/s (2.03ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#3.........: 53635.6 MH/s (2.05ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#4.........: 55270.9 MH/s (2.00ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#5.........: 55048.9 MH/s (2.01ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#6.........: 50955.8 MH/s (2.00ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#7.........: 49530.3 MH/s (2.06ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#8.........: 51705.7 MH/s (2.02ms) @ Accel:1024 Loops:32 Thr:32 Vec:1
Speed.#9.........:  216.1 MH/s (10.37ms) @ Accel:128 Loops:64 Thr:16 Vec:1
Speed.#*.........:  417.1 GH/s
Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new)
Progress.........: 2389792929087488/9301612953526272 (25.69%)
Rejected.........: 0/2389792929087488 (0.00%)
Restore.Point....: 29400137728/115760814336 (25.40%)
Restore.Sub.#1...: Salt:0 Amplifier:23040-23072 Iteration:0-32
Restore.Sub.#2...: Salt:0 Amplifier:79072-79104 Iteration:0-32
Restore.Sub.#3...: Salt:0 Amplifier:80000-80032 Iteration:0-128
Restore.Sub.#4...: Salt:0 Amplifier:2336-2368 Iteration:0-128
Restore.Sub.#5...: Salt:0 Amplifier:14176-14208 Iteration:0-128
Restore.Sub.#6...: Salt:0 Amplifier:3200-3232 Iteration:0-64
Restore.Sub.#7...: Salt:0 Amplifier:40832-40864 Iteration:0-16
Restore.Sub.#8...: Salt:0 Amplifier:28768-28800 Iteration:0-128
Restore.Sub.#9...: Salt:0 Amplifier:67232-67264 Iteration:0-32
Candidate.Engine.: Device Generator
Candidates.#1....: Jrc3e4xq5t -> pycqxbh$ud
Candidates.#2....: 3a6ofodkh0 -> Ebqbxv5yrr
Candidates.#3....: e4qdvb3p5t -> Fxq646zbnc
Candidates.#4....: Derwjlk1rr -> tilkifvr5t
Candidates.#5....: q28er9b$ud -> jk8m0wze4e
Candidates.#6....: Jday0wze4e -> pwiz8c24y7
Candidates.#7....: Aix5zqln4e -> ac0ns6c!l2
Candidates.#8....: s4sts6c!l2 -> 6vpgc5xq5t
Candidates.#9....: vb8ybhlp6a -> V1vn6l8f6a
Hardware.Mon.#1..: Temp: 54c Fan: 46% Util: 86% Core:2775MHz Mem:10251MHz Bus:1
Hardware.Mon.#2..: Temp: 45c Fan: 43% Util:  0% Core:2790MHz Mem:10251MHz Bus:1
Hardware.Mon.#3..: Temp: 44c Fan: 44% Util:  0% Core:2760MHz Mem:10251MHz Bus:1
Hardware.Mon.#4..: Temp: 44c Fan: 43% Util:  0% Core:2835MHz Mem:10251MHz Bus:1
Hardware.Mon.#5..: Temp: 43c Fan: 43% Util:  0% Core:2820MHz Mem:10251MHz Bus:1
Hardware.Mon.#6..: Temp: 46c Fan: 50% Util:  0% Core:2820MHz Mem:10251MHz Bus:1
Hardware.Mon.#7..: Temp: 44c Fan: 47% Util:  0% Core:2730MHz Mem:10251MHz Bus:1
Hardware.Mon.#8..: Temp: 47c Fan: 51% Util:  0% Core:2790MHz Mem:10251MHz Bus:1
Hardware.Mon.#9..: N/A


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The problem remains more and less in other hash modes(some hash modes are almost fast as benchmark like 1500 DES  ). 
The only thing that got to my mind is the lack of RAM . i am newbie in setting up rigs for hashcat but i read before that i need RAM>=VRAM but my motherboard does not support such amount of ram to be installed(Rtx4090 has 24GB vram ) .
So what solutions you experts provide ?

And i should mention i got this warning for all gpu when i start hashcat i don't know weather if it's important :

###
Device #4: WARNING! Kernel exec timeout is not disabled.
            This may cause "CL_OUT_OF_RESOURCES" or related errors.
            To disable the timeout, see: https://hashcat.net/q/timeoutpatch
###