Pipe is slow

Dear atom, in https://hashcat.net/trac/ticket/604#comment:2 you recomend use pipe, but this mode is slow.

Example:

..\hashcat-0.49\hashcat-cliAVX2.exe -r bf.rule "D:\AIR\wordlist\concentrate" --stdout | cudaHashcat64.exe -a 0 -m 2500 --session=s6 -w 2 --gpu-temp-abort=90 --gpu-temp-retain=90 -o "D:\keys\hash_found.txt" --outfile-format=3 D:\in.hccap

Quote:cudaHashcat v1.33 starting...

Device #1: GeForce GTX 980, 4096MB, 1278Mhz, 16MCU
Device #2: GeForce GTX 970, 4096MB, 1253Mhz, 13MCU
Device #3: GeForce GTX 970, 4096MB, 1304Mhz, 13MCU

Hashes: 1 hashes; 1 unique digests, 1 unique salts
Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes
Rules: 1
Applicable Optimizers:
* Zero-Byte
* Single-Hash
* Single-Salt
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 90c
Device #1: Kernel ./kernels/4318/m02500.sm_52.64.ptx
Device #1: Kernel ./kernels/4318/amp_a0_v1.64.ptx
Device #2: Kernel ./kernels/4318/m02500.sm_52.64.ptx
Device #2: Kernel ./kernels/4318/amp_a0_v1.64.ptx
Device #3: Kernel ./kernels/4318/m02500.sm_52.64.ptx
Device #3: Kernel ./kernels/4318/amp_a0_v1.64.ptx

Starting attack in stdin mode...

Session.Name...: s6
Status.........: Running
Input.Mode.....: Pipe
Hash.Target....: ********* (********* <-> *********)
Hash.Type......: WPA/WPA2
Time.Started...: Sat Mar 14 18:28:04 2015 (5 mins, 22 secs)
Speed.GPU.#1...: 110.6 kH/s
Speed.GPU.#2...: 89863 H/s
Speed.GPU.#3...: 89887 H/s
Speed.GPU.#*...: 290.4 kH/s
Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.......: 92037170
Skipped........: 0
Rejected.......: 2221200
HWMon.GPU.#1...: 99% Util, 76c Temp, N/A Fan
HWMon.GPU.#2...: 86% Util, 65c Temp, N/A Fan
HWMon.GPU.#3...: 51% Util, 76c Temp, N/A Fan

  1.png (Size: 72.29 KB / Downloads: 4)

Classic wordlist example:

cudaHashcat64.exe -a 0 -m 2500 --session=s4 -w 2 --gpu-temp-abort=90 --gpu-temp-retain=90 -o "D:\keys\hash_found.txt" --outfile-format=3 D:\in.hccap "D:\AIR\wordlist\BIG"

Quote:cudaHashcat v1.33 starting...

Device #1: GeForce GTX 980, 4096MB, 1278Mhz, 16MCU
Device #2: GeForce GTX 970, 4096MB, 1253Mhz, 13MCU
Device #3: GeForce GTX 970, 4096MB, 1304Mhz, 13MCU

Hashes: 1 hashes; 1 unique digests, 1 unique salts
Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes
Rules: 1
Applicable Optimizers:
* Zero-Byte
* Single-Hash
* Single-Salt
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 90c
Device #1: Kernel ./kernels/4318/m02500.sm_52.64.ptx
Device #1: Kernel ./kernels/4318/amp_a0_v1.64.ptx
Device #2: Kernel ./kernels/4318/m02500.sm_52.64.ptx
Device #2: Kernel ./kernels/4318/amp_a0_v1.64.ptx
Device #3: Kernel ./kernels/4318/m02500.sm_52.64.ptx
Device #3: Kernel ./kernels/4318/amp_a0_v1.64.ptx

Cache-hit dictionary stats D:\wordlist\BIG/08: 4497719949 bytes, 499746661 w
ords, 499746661 keyspace

Session.Name...: s4
Status.........: Running
Input.Mode.....: File (D:\wordlist\BIG/08)
Hash.Target....: ********* (********* <-> *********)
Hash.Type......: WPA/WPA2
Time.Started...: Sat Mar 14 16:51:12 2015 (23 secs)
Time.Estimated.: Sat Mar 14 17:32:52 2015 (41 mins, 15 secs)
Speed.GPU.#1...: 156.6 kH/s
Speed.GPU.#2...: 131.5 kH/s
Speed.GPU.#3...: 137.1 kH/s
Speed.GPU.#*...: 425.2 kH/s
Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.......: 4665344/499746661 (0.93%)
Skipped........: 0/4665344 (0.00%)
Rejected.......: 0/4665344 (0.00%)
Restore.Point..: 4605952/499746661 (0.92%)
HWMon.GPU.#1...: 96% Util, 70c Temp, N/A Fan
HWMon.GPU.#2...: 93% Util, 73c Temp, N/A Fan
HWMon.GPU.#3...: 95% Util, 72c Temp, N/A Fan

I use CPU: Core i7-4820k, 32GB quad channel DDR3.
All videocard install in PCI-E x16 Gen3
It not to be slow.

How i can get full speed with pipe?