给Megahalems浇盆冷水？转个来自XBIT的原生态测试。

vinger85

只截取对比评测的部分。
顺带希望有高手翻译。

14 Super Coolers in Action
Now comes the most interesting part of our test session, that part that took us over two weeks of tests and over 4 days of editorial work. When we ran Linpack tests our quad-core 45nm CPU overclocked to 3.76GHz (+41%) on the weakest cooling system of all participating. The processor core voltage was increase only by 0.075V to 1.275V (+6.3%) in the mainboard BIOS.

We activated “Load-Line Calibration” that lowers the voltage drop on the segment between the voltage regulator and the CPU itself. The memory voltage was set at a fixed value of 1.525V, its frequency equaled 1500MHz with 8-8-8-18 timings :

All other parameters in the mainboard BIOS connected with the CPU and memory overclocking remained unchanged (left at “Auto”).
In this part of our session all coolers were tested with their default fans. If the cooler was equipped with a rotation speed controller, it was tested in two modes: at min and max fan rotation speed. Cooler equipped with PWM-controlled fans were tested in Auto mode (“Turbo” profile in the mainboard BIOS). Since Thermalright TRUE Copper ships without a fan, we tested it with a fan from its fellow cooler – Thermalright Ultra-120 eXtreme-1366 RT – fan model TR-FDB-1600. The same is true for the Thermalright IFX-14 cooler, which also ships without a fan. The tower-heatsinks – Prolimatech Megahalems and ThermoLab BARAM – were topped with a fan from Scythe Mugen 2 with the rotation speed varying between 250 and 1300RPM. The last cooler that has no fan with it, Thermalright AXP-140, was tested with the most suitable fan – Scythe Kaze Maru at 1150 and 1920RPM rotation speeds. I would like to stress once again that we used the same thermal grease for all coolers: it was Arctic Silver 5. The case was also the same: Antec Twelve Hundred.
The red carpet and drum roll are on. Let’s check out the results now:

The coolers on the diagram are lined up in order of efficiency starting with the most efficient one at the very top. Let’s try analyzing the obtained results. The leader is Thermalright IFX-14 with a 4°C advantage over the competitors, which is quite a lot. Overall, when we tested Thermalright IFX-14 we got the impression that this cooler was preeminent among the others. Further tests will confirm this observation.
The leader is followed by a dense group of 11 coolers from Scythe Mugen 2 to Thermalright AXP-140 (at 1920RPM). The difference between the best and the worst in this group is 4°C. The best ones here are Scythe Mugen 2 and Prolimatech Megahalems; only one degree behind them are ThemoLab BARAM and Thermalright Ultra-120 eXtreme that cool the CPU equally well (in this test mode). Noctua NH-U12P SE1366 with two fans at maximum and medium rotation speeds loses another degree. The next one is again Noctua NH-U12P SE1366 at the slowest fan rotation speed, Thermaltake BigTyp 14Pro at 1050RPM and Cooler Master V8. The 11-cooler group is closed by Thermalright AXP-140 with a fan at 1920RPM that yielded to the cooler of the same type – Thermaltake BigTyp 14Pro.
The remaining coolers fall into the outsider group, however, it is important to remember that they are the least efficient coolers of the absolute best out there. Here we see Thermaltake BigTyp 14Pro and Thermalright AXP-140 at the minimal rotation speed of their fans, Cooler Master V10 that has suddenly yielded to the V8 model on Intel Core i7 platform. The very last one in this race is Zalman CNPS9900 LED, which has limited the maximum CPU overclocking for this test. And since we know the maximum CPU overclocking result achieved on the weakest cooler of the today’s testing participants, it is time to check out what the overclocking maximums will be for the rest of the pack:

The difference between maximum overclocking results for each of the cooling solutions is not dramatic, and there is simply no difference between the coolers within their efficiency group. Nevertheless, we can notice a difference in the CPU temperatures at the same frequency and voltage settings. The indisputable leader here is again Thermalright IFX-14 winning 5°C from its closest rival, Scythe Mugen 2. The latter is closely followed by Noctua NH-U12P SE1366 with two fans and two Thermalright Ultra-120 eXtreme coolers. The all-copper TRUE model has finally proved worthy having outperformed its aluminum brother by 2°C. By the way, to ensure CPU stability when tested with Ultra-120 eXtreme with aluminum heatsink, we had to increase the processor core voltage to the next level. At the same time voltage increase didn’t help improve the Core i7 stability at 3958MHz with ThermoLab BARAM cooler, so we had to set the base frequency 1 step lower. Please, do not forget that we are testing these coolers with their default fans, so Thermalright coolers have a slight advantage thanks to a slightly faster fan (although we could argue about it, because the 9-blade Scythe Slip Stream at 1300RPM will hardly yield to the 7-blade Thermalright fan at 1560RPM in terms of the created airflow strength).
After that we see gradual lowering of the stable CPU frequency and increase in its core temperature. The least successful ones here are Cooler Master V10 and Zalman CNPS9900 LED. The new Prolimatech Megahalems rests modestly somewhere in the middle losing in efficiency to the ultimate cooling masters.

以后的省略。
=====================================
大致看了一下。

果然IFX-14最为强势，仅凭单风扇就能完爆双风扇的U12P，体积适中。如果买到怀孕版的，建议打磨。售价较高，但物有所值。

近期的大热门Megahalems的单风扇性能略显中庸，感觉没有发挥出焊接工艺的优势来。此外价格比较尴尬。

MUGEN2虽然是传统的穿FIN工艺，但却是仅次于IFX-14的第二强的单风扇散热器，价格适中。唯一需要注意的就是那庞大的体积。

U120E疲态尽显。该降价了，单风扇下已经完全没有任何优势。当然，完爆U12P还是轻松。。

U12P装上两个风扇尚能饭，暂时可以不必再追求Megahalems或者MUGEN2，效率并不算很差。就是增加风扇后，总价格不讨好。

大台风14CM果然是个外强中干的货。性能与售价不符。

酷冷的半导体V10是个彻底的失败品。效能低下，风扇转速高达2400，而且一次来两个。售价1000元RMB简直是抢劫。

没大蛇啊没大蛇- -

国货没上去对比是很明智的……不然…………

(以上仅代表个人观点）
原文链接：http://www.xbitlabs.com/articles/coolers/display/core-i7-coolers-roundup_18.html

justplay

u12p只有四跟热管，并且热管都聚在一起了，这么落伍的产品，猫头鹰也不推出新产品。

UFT

了解了解

bobow

国外的测试就叫原生态？国内的就不算？我还是相信的电脑实测，Megahalems 400的价格虽然有点贵，但和其性能差不多的，基本也就这个价，这叫市场价~呵呵

dynkin

用的风扇都不一样，没法比较啊。凭什么ifx-14用的风扇就要比1300rpm的高出一截？而且用低速扇和高速扇，排名也许就会完全不一样了。有些散热器适合不太重的任务时使用，有些散热器适合超频的时候使用。

jiyang

进来学习。。。。。。

wukefei1219

不懂啥叫怀孕版

波子小马

IFX-14真猛

vinger85

用的风扇都不一样，没法比较啊。凭什么ifx-14用的风扇就要比1300rpm的高出一截？而且用低速扇和高速扇，排名也许就会完全不一样了。有些散热器适合不太重的任务时使用，有些散热器适合超频的时候使用。
dynkin 发表于 2009-8-18 21:32

比的就是标配风扇。利民的标配就是1500转的。

变形金刚没配风扇，就是说明了性价比不足。

U12P还配两个呢。

顺带，“原生态”是指，我本人没有任何的修改和翻译的意思- -

helpyyl

IFX 14本来就是风冷王（必须磨平）
可是价格也高，兼容也不行

reinhard_x

什么叫做怀孕版？？

dovewy

怀孕：就是指利民散热器底部有突出现象，影响散热效能，磨平后cpu温度有显著降低

Yao_water

利民说怀孕这样可以更好配合intel cpu的铜外壳

edai0223

纯学习，我真的不懂英文

不记得了

Megahalems的性价比还算不错的。就是个头稍大。
U120EX在1500转一样干不过Megahalems,不过毕竟是几年前的产品了。
虽说利民的散热是贵了点，不过性能都还是杠杠的

ftt

路过学习~

skyshi729

和我做的评测结果差不多，就是这个档次

多多天人

不明白转速不一样的测试，能说明什么。