Below is a chat on how much CPU each block and it's FX type uses on the AX8, It's the best guitar processosr I've ever used, if you don't have one you should get one! you can read abou thte AX8 here http://www.fractalaudio.com/ax8-amp-modeler-multi-effects.php
I created a thread on their forum with the original chart but this one is up to date and I will do my best to keep it up to date with incoming Firmware updates. For the original Thread and more info go here http://forum.fractalaudio.com/threads/cpu-usage-chart.121430/#post-1445409
Please keep in mind this is not an official chart it's just a chart I put together based ont he AX8-EDIT's CPU meter running one block at a time, resetting it each time, each value is based on the block and FX type's default settings, where you see this tag: xx% it refers to the CPU usage in HIGH mode for Reverb and for the Pitch block it refers to the type with the economy switch OFF
Version: FW 6.01
| Name | CPU |
|---|---|
| Lg Spring | 08% 08% |
| Md Spring | 08% 08% |
| Sm Spring | 08% 08% |
| Ambience | 17% 25% |
| Stony Quarry | 19% 27% |
| Drum Room | 19% 28% |
| Lg Tiled Room | 20% 28% |
| Rec Studio C | 20% 28% |
| Sm Room | 20% 28% |
| Rec Studio A | 20% 28% |
| Md Chamber | 20% 28% |
| Studio | 21% 28% |
| Sm Hall | 22% 30% |
| Sm Plate | 22% 30% |
| Sm Chamber | 22% 30% |
| Sm Cathedral | 22% 30% |
| Deep Chamber | 22% 30% |
| Rich Hall | 22% 31% |
| Caverb | 22% 30% |
| South Church | 22% 30% |
| Vocal Plate | 22% 30% |
| Wide Hall | 22% 30% |
| Tunnel | 22% 30% |
| Sun Plate | 22% 30% |
| Asylum Hall | 22% 30% |
| Deep Space | 22% 30% |
| North Church | 22% 30% |
| Huge Room | 22% 30% |
| Lg Wooden Room | 22% 30% |
| Lg Cathedral | 22% 31% |
| Lg Room | 22% 30% |
| Lg Hall | 22% 30% |
| Lg Plate | 22% 30% |
| London Plate | 22% 30% |
| Lg Chamber | 22% 30% |
| Md Room | 22% 30% |
| Gymnasium | 22% 30% |
| Md Plate | 22% 30% |
| Md Hall | 22% 31% |
| Md Cathedral | 22% 31% |
| Hallway | 22% 30% |
| Lg Deep Hall | 22% 30% |
| Concert Hall | 23% 30% |
| Name | CPU |
|---|---|
| Hard Fuzz | 10% |
| Micro Boost | 11% |
| M-Zone Dist | 11% |
| Mid Boost | 11% |
| FET Preamp | 11% |
| PI Fuzz | 11% |
| Ruckus | 11% |
| Rat Dist | 11% |
| Shred Dist | 11% |
| SDD Preamp | 11% |
| FET Boost | 11% |
| Blues OD | 11% |
| Esoteric ACB | 11% |
| Esoteric RCB | 11% |
| Bender Fuzz | 11% |
| Tape Dist | 11% |
| Fat Rat | 11% |
| Bit Crusher | 12% |
| Octave Dist | 12% |
| Tube Drv 3-K | 12% |
| Treble Boost | 12% |
| Tube Drv 3-K | 12% |
| T808 OD | 13% |
| T808 Mod | 13% |
| Master Fuzz | 13% |
| FAS Boost | 13% |
| Face Fuzz | 13% |
| Eternal Love | 13% |
| Plus Dist | 13% |
| FAS LED-Drive | 13% |
| FULL OD | 13% |
| BB Pre | 13% |
| Zen Master | 15% |
| Super OD | 15% |
| Name | CPU |
|---|---|
| Script 45 | 03% |
| Script 90 | 03% |
| Digital Stereo | 03% |
| Digital Mono | 03% |
| Block 90 | 03% |
| Stereo 8-Stereo | 04% |
| Classic Vibe | 04% |
| Barberpole | 11% |
| Name | CPU |
|---|---|
| Stereo Jet | 05% |
| Thru-Zero | 05% |
| Zero Flanger | 05% |
| Pop Flanger | 05% |
| Digital Stereo | 05% |
| Digital Mono | 05% |
| Analog Stereo | 06% |
| Analog Mono | 06% |
| Name | CPU |
|---|---|
| Octave Div | 04% 05% |
| Arpeggiator | 05% 07% |
| Ad. Whammy | 06% 07% |
| Cl. Whammy | 06% 07% |
| Intel Harm | 08% 11% |
| Fixed Harm | 08% 11% |
| Crystals | 08% |
| Detune | 08% 11% |
| Cust. Shift | 09% 12% |
| Name | CPU |
|---|---|
| Diffusor | 05% |
| Ten-Tap Dly | 05% |
| Quad-Series | 06% |
| Band Delay | 06% |
| Rhythm Tap | 07% |
| Plex Delay | 08% |
| Quad Tape Dly | 10% |
| Plex Shift | 13% |
| Plex Detune | 13% |
| Name | CPU |
|---|---|
| Reverse Delay | 04% |
| Mono Tape | 07% |
| Lo-Fi Tape | 08% |
| Mono BBD | 08% |
| Digital Stereo | 08% |
| Digital Mono | 08% |
| Stereo BBD | 08% |
| Deluxe Mind Guy | 08% |
| Stereo Tape | 09% |
| Vintage Delay | 09% |
| 2290 w/ Mod | 09% |
| Ping Pong | 10% |
| Ducking Delay | 10% |
| Dual Delay | 10% |
| Analog Mono | 10% |
| Analog Stereo | 10% |
| Ambien Stereo | 14% |
| Sweep Delay | 14% |
| Name | CPU |
|---|---|
| Vol/Pan | 01% |
| GEQ | 01% |
| Formant | 02% |
| Looper | 02% |
| FX Loop | 02% |
| Enhancer Classic | 02% |
| Filter | 02% |
| Ring Mod | 02% |
| PEQ | 02% |
| Wah All Types | 03% |
| Amp | 03% |
| Enhancer Modern | 04% |
| Gate/Exp | 04% |
| Cab | 04% |
| Synth | 07% |
| Rotary | 08% |
| Name | CPU |
|---|---|
| Vintage Tape | 06% |
| Dimension 2 | 07% |
| Japan CE-2 | 07% |
| Triangle Chorus | 07% |
| Dimension 1 | 07% |
| Warm Stereo | 07% |
| Digital Stereo | 07% |
| 80's Style | 07% |
| Analog Mono | 07% |
| Analog Stereo | 07% |
| Digital Mono | 07% |
| 4-Voice Analog | 10% |
| 8-Voice Analog | 15% |
| Name | CPU |
|---|---|
| Tremolo | 02% |
| Panner | 05% |
| Name | CPU |
|---|---|
| Pedal Comp 1 | 02% |
| Dynamics | 03% |
| Pedal Comp 2 | 03% |
| Studio Comp | 04% |