Overclocking
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| BIOS Frequency and Voltage settings (for overclocking) | |||
|---|---|---|---|
| Row 0 - Cell 0 | ASRock Z77 Extreme4 | Asus P8Z77-V LX | Biostar TZ77XE3 |
| CPU Base Clock | 95-150 MHz (1 MHz) | 80-300 MHz (0.1 MHz) | 95-300 MHz (0.01 MHz) |
| CPU Multiplier | Up to 63x | Up to 63x | Up to 63x |
| DRAM Data Rates | 1066-2800 (200, 266.6 MHz) | 800-3200 (200, 266.6 MHz) | 1066-2800 (200, 266.6 MHz) |
| CPU Vcore | 0.60-1.70 V (5 mV) | 0.80-1.99 V (5 mV) | 1.00-1.79 V (10 mV) |
| VTT Voltage | 0.77-1.63 V (10 mV) | Row 5 - Cell 2 | 1.05-1.70 V (12.5 mV) |
| VCCSA Voltage | 0.93, 1.02, 1.11, 1.20 V | 0.74-1.69 V (5 mV) | 0.90-1.70 V (12.5 mV) |
| PCH Voltage | 0.78-1.65 V (9.3 mV) | 0.74-1.69 V (5 mV) | 1.05 V +0 to +15% (5%) |
| DRAM Voltage | 1.17-1.80 V (5 mV) | 1.19-2.14 V (5 mV) | 1.30-2.11 V (12 mV) |
| CAS Latency | 4-15 Cycles | 1-15 Cycles | 4-15 Cycles |
| tRCD | 3-15 Cycles | 1-15 Cycles | 3-15 Cycles |
| tRP | 3-15 Cycles | 1-15 Cycles | 3-15 Cycles |
| tRAS | 9-63 Cycles | 1-255 Cycles | 9-63 Cycles |
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| BIOS Frequency and Voltage settings (for overclocking) | ||||
|---|---|---|---|---|
| Row 0 - Cell 0 | ECS Z77H2-A2X Deluxe | Gigabyte Z77X-D3H | Intel DZ77SL-50K | MSI Z77A-G45 |
| CPU Base Clock | 99-150 MHz (1 MHz) | 80-133.33 MHz (0.01 MHz) | 100-300 MHz (1 MHz) | 0-655 MHz (0.1 MHz) |
| CPU Multiplier | Up to 59x | Up to 63x | Up to 255x | Up to 63x |
| DRAM Data Rates | 1066-2800 (200, 266.6 MHz) | 800-3200 (200, 266.6 MHz) | 1066-2400 (266.6 MHz) | 800-2933 (200, 266.6 MHz) |
| CPU Vcore | 1.00-1.50 V (25 mV) | 0.80-1.90 V (5 mV) | 1.00-1.92 V (5 mV) | 0.81-1.52 V (5 mV) |
| VTT Voltage | +0 to +0.63 V (10 mV) | 0.80-1.70 V (5 mV) | 1.00-1.80 V (5 mV) | 0.95-1.55 V (10 mV) |
| VCCSA Voltage | +0 to +0.63 V (10 mV) | 0.72-1.40 V (5 mV) | 0.85-1.75 V (5 mV) | 0.87-1.51 V (10 mV) |
| PCH Voltage | +0 to +0.63 V (10 mV) | Not Adjustable | 1.00-1.50 V (12.5 mV) | 0.78-1.73 V (5.5 mV) |
| DRAM Voltage | +0 to +0.63 V (10 mV) | 1.10-2.10 V (5 mV) | 1.20-1.80 V (50 mV) | 1.11-2.47 V (7.25 mV) |
| CAS Latency | 4-15 Cycles | 5-15 Cycles | 2-255 Cycles | 5-15 Cycles |
| tRCD | 3-15 Cycles | 4-15 Cycles | 2-255 Cycles | 4-15 Cycles |
| tRP | 3-15 Cycles | 4-15 Cycles | 2-255 Cycles | 4-15 Cycles |
| tRAS | 9-63 Cycles | 5-63 Cycles | 5-65535 Cycles | 10-40 Cycles |
In spite of cooling differences, Asus’ hot-running P8Z77-V LX tops our CPU overclocking chart, while MSI’s cold-blooded Z77-G45 falls to the bottom.
Gigabyte’s Z77X-D3H takes the lead in base clock, accomplishing the highest reference frequency this processor has ever seen! This astonishing feat should be most significant to builders who can’t afford one of Intel’s unlocked K-series processors.
Intel uses 21.33x as its highest memory multiplier, and doing so leaves the DZ77SL-50K stuck with sub-2200 MT/s data rates. ASRock and Asus are on par, with MSI only slightly behind.
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