A15 Bionic (iPad) vs A4 (iPad)
            A15 Bionic (iPad)
            
                
            
        
    
            A4 (iPad)
            
                
            
        
    | 6 Cores 6 Threads 2.93GHz Clock | 1 Core 1 Thread 1GHz Clock | 
| Socket Unknown | Socket Unknown | 
| iGPU5-Core A15 1.71 TFLOPS FP32 | iGPUPowerVR SGX535 A4 0 GFLOPS FP32 | 
| GB6S 2,155 53% | GB6S N/A 0% | 
| GB6M 5,590 21% | GB6M N/A 0% | 
| CB23S N/A 0% | CB23S N/A 0% | 
| CB23M N/A 0% | CB23M N/A 0% | 
| ManufacturerApple | ManufacturerApple | 
| ArchitectureApple Silicon 11 | ArchitectureARMv7-A | 
| FamilyA Series | FamilyA Series | 
| Instruction Set (ISA) AArch64 | Instruction Set (ISA) AArch32 | 
| Codename Ellis - A15 P-Core Avalanche - - E-Core Blizzard | Codename - - - - Cortex-A8 - - - - | 
| Market Segment Tablet | Market Segment Tablet | 
| Release Date 9/24/2021 | Release Date 4/3/2010 | 
| Foundry TSMC - - - | Foundry Samsung - - - | 
| Node N5P - - - | Node 45nm - - - | 
| Die Size 108 mm² - - - | Die Size 53 mm² - - - | 
| Transistor Count 15 Billion - - - | Transistor Count Unknown - - - | 
| Unknown | Unknown | 
| 6 Cores 2 P-Cores - 4 E-Cores | 1 Core - - - | 
| 6 Threads 2 P-Threads - 4 E-Threads | 1 Thread - - - | 
| P-Core 2.93GHz - - | - 1GHz - - | 
| - - - | - - - | 
| E-Core 2.02GHz - | - - - | 
| Overclocking Locked - - - | Overclocking Locked - - - | 
| Integrated Chipset - | Integrated Chipset - | 
| - - | - - | 
| - - | - - | 
| - - | - - | 
| - - | - - | 
| - - | - - | 
| - - | - - | 
| - - | - - | 
| L0 Instruction - - | L0 Instruction - - | 
| L0 Data - - | L0 Data - - | 
| L1 Instruction 192KB/P-Core 6-way set associative - - 128KB/E-Core 4-way set associative | L1 Instruction 32KB/Core 4-way set associative - - - - | 
| L1 Data 128KB/P-Core 4-way set associative - - 64KB/E-Core 2-way set associative | L1 Data 32KB/Core 4-way set associative - - - - | 
| L2 - - 12MB Shared 12-way set associative - - - - - - 4MB Shared (E-Core) 16-way set associative | L2 512KB/Core 8-way set associative - - - - - - - - - - | 
| - - - - - - - - - - | - - - - - - - - - - | 
| - - - 32MB SLC Cache | - - - - | 
| Channels 1 | Channels 2 | 
| Max Memory 4GB | Max Memory 1GB | 
| ECC Not Supported | ECC Not Supported | 
| Bus Width/Channel 64Bit Bus Width 64Bit | Bus Width/Channel 32Bit Bus Width 64Bit | 
| Clock 2133MHz Transfer Rate 4266MT/s | Clock 200MHz Transfer Rate 400MT/s | 
| Bandwidth/Channel 34.1GB/s Bandwidth 34.1GB/s | Bandwidth/Channel 1.6GB/s Bandwidth 3.2GB/s | 
| TDP 5W - - - | TDP 5W - - - | 
| - - - | - - - | 
| Included Cooler Not Included | Included Cooler Not Included | 
| No PCIe | No PCIe | 
| 5-Core A15 640 Shaders 1338MHz 1.71 TFLOPS FP32 | PowerVR SGX535 A4 4 Shaders 250MHz 0 GFLOPS FP32 | 
| - | No NPU - | 
| - 16 Cores | - - | 
| 15.8 TOPS FP16 | -  | 
| - - | - - | 
| No Cellular | No Cellular | 
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