Overclock test

We use ZEROtherm NV120 as CPU cooler in this part. The memory we used in this part is Crucial BallistiX DDR3 with EPP2.0. Room temperature stables at 22℃. And we disable EIST and CIE in BIOS.

Other option will be in Auto if we don’t mentioned in these part of articles.

The test standard is SP2004 Orthos Edition, Blend mode, Priority 9, 15minutes.

1. 65nm dual core processor bus speed 500MHz basic test

The OCbility of 790i Ultra SLI is as good as Intel X38, the only thing we’ve done is raise CPU core voltage to 1.36250V and E6300 can reach 500MHz bus speed. When we sync memory with CPU, and it runs at DDR3-2000MHz，voltage 1.90V.

2. 65nm dual core processor eXtreme test

Bus speed reaches 560MHz

The highest bus speed we can get is 560MHz, and core frequency reaches 3920MHz, raises more than 100%. But in this situation we can not even finish superPi.

3. 65nm Quad core overclock test

In these test we use Q6700 with G0 stepping, default frequency 266×10＝2.66GHz.

In these mobo we can OC to 350MHz bus speed, core clock 3.5GHz. But if we set bus speed to 400MHz and Multipiler=9 the test can not be done. At this point we think it is weaker than Asus triker II Extreme(x38).

4. 45nm Quad core overclock test

45nm processors now have already began to enter the market for a while, and they will become the main trend of the market. So a board with good 45nm processor OC support is very important. 790i Ultra can OC QX9650 to 415×10=4.15GHz and runs everything stable. After lower the multiplier to 9 we’ve able to run it stable at 460×9=4.14GHz. But a higher bus speed challenge is failed.

Thoughts:

1. OCbility almost equal to Intel X38 mobo.

2. CPU FSB voltage is the key to higher CPU bus speed.

3. Memory latency should be adjusting manually. 4. Voltage adjustment have big inaccuracy, we suggest adjusting manually.

Page 1: Introduction
Page 2: nForce 790i Ultra SLI new Feature
Page 3: nForce 790i Ultra SLI new feature II
Page 4: nForce 790i Ultra SLI new features III
Page 5: A close look at the board’s key area
Page 6: The cooler
Page 7: Mobo details
Page 8: Chips
Page 9: Package and other stuffs
Page 10: CPU cooler compatibility Test
Page 11: Mobo BIOS Options－Basics
Page 12: Mobo BIOS Option －Overclocking
Page 13: Mobo BIOS options－Voltage adjusting
Page 14: Conclusion on BIOS Options
Page 15: Overclock test
Page 16: Performance test platform and remarks
Page 17: Performance Test
Page 18: Final thought

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