Processor | Clock Speed | Cores / Threads | Maximum Single Core Turbo Frequency | TDP | Price |
Intel Core i7-975 Extreme | 3.33GHz | 4 / 8 | 3.60GHz | 130W | $999 |
Intel Core i7 965 Extreme | 3.20GHz | 4 / 8 | 3.46GHz | 130W | $999 |
Intel Core i7 940 | 2.93GHz | 4 / 8 | 3.20GHz | 130W | $562 |
Intel Core i7 920 | 2.66GHz | 4 / 8 | 2.93GHz | 130W | $284 |
Intel Core i7 870 | 2.93GHz | 4 / 8 | 3.60GHz | 95W | $562 |
Intel Core i7 860 | 2.80GHz | 4 / 8 | 3.46GHz | 95W | $284 |
Intel Core i5 750 | 2.66GHz | 4 / 4 | 3.20GHz | 95W | $196 |
From Left to Right: Retail LGA-1366 Cooler, Retail LGA-1156 Cooler, Retail 45nm LGA-775 Cooler
On every single Nehalem (Lynnfield included) lies around 1 million transistors (about the complexity of a 486) whose sole task is managing power. It turns cores off, underclocks them and is generally charged with the task of making sure that power usage is kept to a minimum. Lynnfield's PCU (Power Control Unit) is largely the same as what was in Bloomfield. The architecture remains the same, although it has a higher sampling rate for monitoring the state of all of the cores and demands on them.
The PCU is responsible for turbo mode.
CPU | Socket | Core Clock | Un-Core Clock |
Intel Core i7 975 Extreme | LGA-1366 | 3.33GHz | 2.66GHz |
Intel Core i7 965 Extreme | LGA-1366 | 3.20GHz | 2.66GHz |
Intel Core i7 950 | LGA-1366 | 3.06GHz | 2.13GHz |
Intel Core i7 940 | LGA-1366 | 2.93GHz | 2.13GHz |
Intel Core i7 920 | LGA-1366 | 2.66GHz | 2.13GHz |
Intel Core i7 870 | LGA-1156 | 2.93GHz | 2.40GHz |
Intel Core i7 860 | LGA-1156 | 2.80GHz | 2.40GHz |
Intel Core i5 750 | LGA-1156 | 2.66GHz | 2.13GHz |
Lynnfield's memory controller is good, easily as good as what's in Bloomfield if not slightly better.
Multi-GPU SLI/CF Scaling: Lynnfield's Blemish
When running in single-GPU mode, the on-die PCIe controller maintains a full x16 connection to your graphics card:
Hooray.
In multi-GPU mode, the 16 lanes have to be split in two:
SYSMark 2007 Performance
Our journey starts with SYSMark 2007, the only all-encompassing performance suite in our review today. The idea here is simple: one benchmark to indicate the overall performance of your machine.
I already spoiled the surprise and gave out the SYSMark data earlier, but this should put things in perspective. See how the Core i7 870 and Core i5 750 fit nicely in between the Core i7 920 and 975? Yeah, that's because pretty much anything below the 975 doesn't make sense anymore thanks to Lynnfield.
Guess what else doesn't make sense anymore? AMD's pricing on the Phenom II X4 965 BE. The 965 BE is priced at $245 while the i5 750 is a $196 processor. The 750 is about 6% faster here. AMD will need to adjust its prices downward after this.
The standings move around a bit in the individual SYSMark tests, but the bottom line remains: the Core i5 750, despite lacking Hyper Threading, is worthy.
린필드 870의 게이밍 퍼포먼스는 블룸필드 최상위 모델인 975 익스트림과 동급이거나 약간 떨어지는 정도, 기타 어플리케이션 성능은 블룸필드가 확실히 앞선다. 이전 벤치자료들과 같은 맥락의 결과를 확인할수 있는데, 린필드는 블룸필드와의 비교시 게이밍 성능은 별반 차이가 없고, 일반 어플리케이션에서는 블룸필드가 린필드를 확실히 앞선다. 또한 모든 린필드 패밀리는 모든 블룸필드 패밀리보다 앞도적으로 전력효율이 좋다. 추가적으로 린필드의 터보부스트 기술은 멀티코어에 최적화되어 있지 않은 프로그램들에서 최대 17%정도까지 높은 성능을 발휘할수 있도록 어시스트한다.