In depth comparison and review of Intel Core i7 4790 (4th Gen) and Intel Core 2 Quad Q8400. Compare dimensions, performance, cache memory, number of cores, clock speed, RAM, power efficiency and other important specifications and features to easily choose the right CPU for you. Our goal is to help you uncover differences between the products and find the processor that will best fit your needs.
| GENERAL | Intel Core i7 4790 (4th Gen) | Intel Core 2 Quad Q8400 |
|---|
| Product Type | Processor | Processor |
|---|
| PROCESSOR | Intel Core i7 4790 (4th Gen) | Intel Core 2 Quad Q8400 |
|---|
| Type | Intel Core i7 4790 (4th Gen) | Intel Core 2 Quad Q8400 |
|---|
| ARCHITECTURE |
|---|
| Processor Qty | 1 | 1 |
|---|---|---|
| Compatible Processor Socket | LGA1150 Socket | LGA775 Socket |
| Manufacturing Process | 22 nm | 45 nm |
| Thermal Design Power | 95 W | 95 W |
| Thermal Specification | 72.72 °C | 71.4 °C |
| PCI Express Revision | 3.0 | - |
| PCI Express Configurations | 1x16, 2x8, 1x8+2x4 | - |
| PCI Express Lanes Qty | 16 | - |
| Architecture Features | Enhanced SpeedStep technology, Hyper-Threading Technology, Execute Disable Bit capability, Intel Virtualization Technology, Intel 64 Technology, Intel Trusted Execution Technology, streaming SIMD extensions 4.1, streaming SIMD extensions 4.2, Intel Turbo Boost Technology 2.0, Intel My WiFi Technology, Intel Anti-Theft Technology, Intel AES New Instructions (AES-NI), Thermal Monitoring Technologies, Intel Virtualization Technology for Directed I/O (VT-d), Intel vPro Technology, Intel Smart Cache, Idle States, Intel VT-x with Extended Page Tables (EPT), Intel Identity Protection Technology, Intel Secure Key, Intel Advanced Vector Extensions 2 (AVX2.0), Intel TSX-NI, Intel Stable Image Platform Program (SIPP) | Enhanced SpeedStep technology, Execute Disable Bit capability, Intel Virtualization Technology, Intel 64 Technology, Enhanced Halt State (C1E), Intel Thermal Monitor 2 |
| PERFORMANCE |
|---|
| Number of Cores | Quad-Core | Quad-Core |
|---|---|---|
| Number of Threads | 8 threads | - |
| Clock Speed (Frequency) | 3.6 GHz | 2.66 GHz |
| Max Turbo Speed | 4 GHz | - |
| Bus Speed | - | 1333 MHz |
| 64-bit Computing | - | Yes |
| CACHE MEMORY |
|---|
| Cache | 8 MB | 4 MB |
|---|---|---|
| Cache Memory Details | Smart Cache - 8 MB | L2 - 4 MB |
| Installed Size | 8 MB | 4 MB |
| INTEGRATED GRAPHICS (GPU) | Intel Core i7 4790 (4th Gen) | Intel Core 2 Quad Q8400 |
|---|
| Type | Intel HD Graphics 4600 | - |
|---|---|---|
| Base Frequency | 350 MHz | - |
| Max Dynamic Frequency | 1.2 GHz | - |
| Max Supported Memory Size | 2 GB | - |
| Max Supported Resolution | 4096x2304@24Hz (HDMI), 3840x2160@60Hz (DP), 3840x2160@60Hz (eDP), 1920x1200@60Hz (VGA) | - |
| Features | Intel Clear Video HD Technology, InTRU 3D Technology, Intel Quick Sync Video, Intel Wireless Display (WiDi), Intel Insider, Triple Display Capable | - |
| EXPANSION & CONNECTIVITY | Intel Core i7 4790 (4th Gen) | Intel Core 2 Quad Q8400 |
|---|
| Compatible Slots | 1 x processor - LGA1150 Socket | 1 x processor - LGA775 Socket |
|---|
| MISCELLANEOUS | Intel Core i7 4790 (4th Gen) | Intel Core 2 Quad Q8400 |
|---|
| Service & Support | Limited warranty - 3 years | Limited warranty - 3 years |
|---|
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