THE BIOS
The BIOS has a comprehensive set of options for you to tune up your system. For users who just want to run it at default, you can use XMP profiles detected from the DIMMs. Of course, fine tuning requires much effort. If you just want a straightforward overclocked system, you can use the TPU to do it for you.
The DRAM, Cache speed, CPU graphics speed and DMI/PEG Clock are all dependent on the BCLK. For K series processors, the BCLK can be set to run higher than the usual 105MHz. This is because when BCLK goes higher than 125MHz, the DMI clock goes back to 100MHz. The DMI clk will be at 100MHz as it runs at a ratio of the BCLK.
In the BIOS, you also sync all cores to the core ratio limit., change the min and max Cache ratio and DRAM frequency the RAM runs at.
Below is a run through of all the options available in the BIOS.
Adjustable Voltage Range:
Options
Available Options
CPU Core Voltage Override 0.001~1.920, under 0.001V increment
CPU Cache Voltage Override 0.001~1.920, under 0.001V increment
CPU Graphics Voltage Override 0.001~1.920, under 0.001V increment
CPU Core Voltage Offset -0.999~0.999, under 0.001V increment
CPU Cache Voltage Offset -0.999~0.999, under 0.001V increment
CPU Graphics Voltage Offset -0.999~0.999, under 0.001V increment
Additional Turbo Mode CPU Core Voltage 0.001~1.920, under 0.001V increment
Additional Turbo Mode CPU Cache Voltage 0.001~1.920, under 0.001V increment
Additional Turbo Mode CPU Graphics Voltage 0.001~1.920, under 0.001V increment
CPU System Agent Voltage Offset -0.999~0.999, under 0.001V increment
CPU Analog I/O Voltage Offset -0.999~0.999, under 0.001V increment
CPU Digital I/O Voltage Offset -0.999~0.999, under 0.001V increment
CPU Input Voltage
0.800~2.700V(Extreme OV Disabled) or
0.800~3.040V(Extreme OV Enabled) under 0.01V
increment
SVID Voltage Override 0.001~2.440V under 0.01V increment
DRAM Voltage 1.20000~1.92000V under 0.01000V increment
PCH VLX Voltage 1.20000~2.00000V under 0.01250V increment
PCH Voltage 0.70000~1.50000V under 0.01250V increment
DRAM CTRL REF Voltage 0.39500~0.63000V under 0.00500V increment
DRAM DATA REF Voltage on Channel A 0.39500~0.63000V under 0.00500V increment
DRAM DATA REF Voltage on Channel B 0.39500~0.63000V under 0.00500V increment
Clock Crossing Vboot 0.10000~1.90000V under 0.00625V increment
Clock Crossing Reset Voltage 0.10000~1.90000V under 0.00625V increment
Clock Crossing Voltage 0.10000~1.90000V under 0.00625V increment
Adjustable Frequency Range:
Options
Available Options
CPU Strap 100MHz / 125MHz / 167MHz / 250MHz
BCLK Frequency 80.0~300.0, under 0.1MHz increment
1/2/3/4-Core Ratio Limit Lowest Turbo Ratio ~ 80, under 1x interval
Min CPU Cache Ratio 8~80, under 1x interval
Max CPU Cache Ratio 8~80, under 1x interval
CPU bus speed : DRAM speed ratio mode 100:133 / 100:100
Memory Frequency Vary depending on the BCLK used.
CPU Graphics Max. Ratio 25~60, under 1x interval
DRAM CAS# Latency 1~31, under 1x interval
DRAM RAS# to CAS# Delay 1~31, under 1x interval
DRAM RAS# PRE Time 1~31, under 1x interval
DRAM RAS# ACT Time 1~63, under 1x interval
DRAM Command Mode 1~3, under 1x interval
DRAM RAS# to RAS# Delay 1~15, under 1x interval
DRAM REF Cycle Time 1~511, under 1x interval
DRAM Refresh Interval 1~65535, under 1x interval
DRAM WRITE Recovery Time 1~16, under 1x interval
DRAM READ to PRE Time 1~15, under 1x interval
DRAM FOUR ACT WIN Time 1~255, under 1x interval
DRAM WRITE to READ Delay 1~15, under 1x interval
DRAM CKE Minimum pulse width 1~15, under 1x interval
DRAM CAS# Write Latency 1~31, under 1x interval
tRDRD 1~7, under 1x interval
tRDRD_dr 1~15, under 1x interval
tRDRD_dd 1~15, under 1x interval
tWRRD 1~63, under 1x interval
tWRRD_dr 1~15, under 1x interval
tWRRD_dd 1~15, under 1x interval
tWRWR 1~7, under 1x interval
tWRWR_dr 1~15, under 1x interval
tWRWR_dd 1~15, under 1x interval
Dec_WRD 0~1, under 1x interval
tRDWR 1~31, under 1x interval
tRDWR_dr 1~31, under 1x interval
tRDWR_dd 1~31, under 1x interval
DRAM CLK Period 1~14, under 1x interval
DRAM RTL Initial Value 1~63, under 1x interval
DRAM RTL (CHA_R0D0) 1~63, under 1x interval
DRAM RTL (CHA_R0D1) 1~63, under 1x interval
DRAM RTL (CHA_R1D0) 1~63, under 1x interval
DRAM RTL (CHA_R1D1) 1~63, under 1x interval
DRAM RTL (CHB_R0D0) 1~63, under 1x interval
DRAM RTL (CHB_R0D1) 1~63, under 1x interval
DRAM RTL (CHB_R1D0) 1~63, under 1x interval
DRAM RTL (CHB_R1D1) 1~63, under 1x interval
DRAM IO-L (CHA_R0D0) 1~15, under 1x interval
DRAM IO-L (CHA_R0D1) 1~15, under 1x interval
DRAM IO-L (CHA_R1D0) 1~15, under 1x interval
DRAM IO-L (CHA_R1D1) 1~15, under 1x interval
DRAM IO-L (CHB_R0D0) 1~15, under 1x interval
DRAM IO-L (CHB_R0D1) 1~15, under 1x interval
DRAM IO-L (CHB_R1D0) 1~15, under 1x interval
DRAM IO-L (CHB_R1D1) 1~15, under 1x interval
Running the graphics test at 1024×768 it was just to show how powerfull is the CPU.
In my opinion the good way would be to run all graphics test at hd resolution at 1280×800,
like in Unigine Heaven. Small resolution with reduced detail is no struggle for a nowadays decent gpu. This CPU-GPU pair from Intel supposed to be one of the first one with “GPU”. And the benchmark just simply missed this point. Make the vga work hard, yes also for the amd counterpart. Let we see what they can do if we go over the word/excel/powerpoint type of works. 100 fps is useless in excel.
Thanks for your response. Regarding Heaven Demo, it is tested in Basic mode which runs 1280×720 to test the internal graphics. Likewise we use the same method to test the AMD APUs e.g. A10-5800K
You ask why performance dropped with overclocking? One word: Throttling. Haswell gets very hot, you need excellent cooling if you don’t want throttling during OC!
You may be right but temperatures were ok. You don’t really need excellent cooling with this processor as 4.1GHz is really nothing compared to the 4770K running 4.7GHz on AIR.
If you look at it, when the BCLK is raised, the other clks like DMI are also affected. In fact, at certain CLK levels>100mhz, the DMI drops below 90Mhz. Don’t forget we applied a ratio to the graphics core. If graphics core is set to default, it might not have affected the processor’s performance.
Why even bother to test the 4770 along side with a i5 3570K.. not really any use since the 3570K is last gen and it is one model down at that too. more appropriate would be to use the i7 3770K as a point of reference for the 4770 as this will give a better review to if Haswell made any significant performance improvements in either processing power, energy savings,and video performance. Between the 3770K and 4770/k it seems more of a video improvement… at least on paper
Sometimes it just happens that you don’t have the processor on hand. You are right the improvement is more on the video and power.