Original Link: https://www.anandtech.com/show/279



Recently Intel has been appearing increasingly idealistic in their expectations for the future of the industry. Starting out with their assumption that the market would be ready for a transition to the Camino chipset by mid-year, and now extending to the indication that they could possibly be pursuing a RDRAM-only solution when the Camino hits the streets towards the end of the year. For those of you that aren’t familiar, Rambus DRAM, or RDRAM, is Intel’s vision of the future of the memory that will be driving the latest desktop machines, workstations, and servers, therefore replacing the current standard, Synchronous DRAM (SDRAM) which is incompatible with the aforementioned standard.

In contrast to Intel’s dramatic actions in the industry, competing chipset manufacturer VIA Technologies has taken it upon themselves to make the most of what the market currently has to offer. VIA has already announced that they are planning to take a significant lead over Intel in chipset design features and specifications with the upcoming release of their Apollo Pro Plus 133, and as the name indicates, official support for the 133MHz FSB is included among those features.

In AnandTech’s March ‘99 SDRAM Comparison it was quite clear that achieving great stability at the 133MHz FSB frequency was quite difficult. With the only SDRAM featured in the comparison able to make it up to 133MHz at 100% stability being the pricey EMS HSDRAM modules, the outlook for VIA’s upcoming 133MHz chipsets did not look too great. Luckily, for VIA’s sake and for the sake of the upgrading population out there, there are some enhancements being made in the search for true PC133 SDRAM. After supplying AnandTech with the Samsung based SDRAM modules from the March ’99 SDRAM Comparison, Corsair Microsystems decided to pursue a different avenue for their products. Instead of using Samsung modules as the basis for their SDRAM modules of above average stability, Corsair went back to the old days and pursued a once very well known memory chip manufacturer, Micron, to help with the production of their next-generation PC133 SDRAM modules.

The result was a Corsair SDRAM module, using a Corsair PCB (which didn’t prove to be a problem in the March ’99 Comparison), and outfitted with Micron PC133 SDRAM chips. How well does Corsair’s latest addition fare in comparison to the rest of the entries?

Preparing the Test

In order to isolate the memory modules as the only realistic causes of any fluctuation in stability, choosing the proper test bed was a bit of an ordeal, luckily AnandTech was aided in lab by the wonderful folks over at Kryotech who supplied AnandTech with a room temperature cooling system a week before the first stability tests were to commence. At the heart of AnandTech's SDRAM stability test bed was a Pentium II 333, capable of being reliably overclocked to 416MHz, running at room temperature with the aid of Kryotech's Renegade ATX-PE Room Temperature Cooler. The ambient case temperature of the Renegade test bed was kept at room temperature, or approximately 22 degrees Celsius, as was the surface temperature of the Pentium II processor.

The 333MHz Pentium II was chosen for its versatility in terms of clock multiplier support, as AnandTech's sample remained clock unlocked, and allowed for the usage of the 2.5x clock multiplier when testing higher FSB settings. In order to gain support for a wide variety of FSB frequencies, two motherboards were used as the basis for the test bed, the choice to use two motherboards came to make sure that there were no specific incompatibilities between the SDRAM being compared and a particular motherboard.

The entire test bed was configured as follows:

CPU Intel Pentium II 333
Motherboard ABIT BX6 Revision 2 & AOpen AX6BC
Video Matrox Millennium II PCI
Hard Disk Western Digital 5.1GB Caviar UltraATA
Operating System Microsoft Windows 98


The Candidates

The requirements for submission were as follows: All entries into the March 1999 AnandTech SDRAM Memory Comparison were to be made in pairs, and in configurations of 8 x 64 (64MB), 16 x 64 (128MB), and 32 x 64 (256MB). The modules must be available for sale within three months of the release of the article. So without further ado, we have AnandTech's top SDRAM candidates. (click images to enlarge)

Corsair Micron PC133 Pre-Release Module 64MB
corsair-micron-front.jpg (8013 bytes)

New Entry

64MB
corsair-micron-back.jpg (8325 bytes)

Azzo PC133 Pre-Release Module 64MB
azzo_pc133sample_64mb_front.jpg (7178 bytes)
64MB
azzo_pc133sample_64mb_back.jpg (7504 bytes)

Corsair SEC Modules 256MB
corsair_sec_256mb_front.jpg (8396 bytes)
128MB
corsair_sec_128mb_front.jpg (7844 bytes)
64MB
corsair_sec_64mb_front.jpg (7694 bytes)

Enhanced Memory Systems PC133 HSDRAM 128MB
edram_esdram_128mb_front.jpg (7235 bytes)
128MB
edram_esdram_128mb_back.jpg (7279 bytes)
64MB
edram_esdram_64mb_front.jpg (6542 bytes)
64MB
edram_esdram_64mb_back.jpg (6571 bytes)

Goldstar LGS 64MB
lgs_64mb_front.jpg (7102 bytes)
64MB
lgs_64mb_back.jpg (7138 bytes)

Memman Mosel Vitalic 128MB
memman_moselvitalic_front.jpg (7370 bytes)
64MB
memman_moselvitalic_front.jpg (7370 bytes)

Memman SEC w/ 3rd Party PCB 64MB
memman_sec_thirdpartypcb_front.jpg (7097 bytes)

Memman SEC Originals w/ SEC PCB 64MB
memman_secoriginals_front.jpg (7459 bytes)
64MB
memman_secoriginals_back.jpg (7484 bytes)

Mushkin Hyundai 128MB
mushkin_hyundai_thirdpartypcb_128mb_front.jpg (7513 bytes)
128MB
mushkin_hyundai_thirdpartypcb_128mb_back.jpg (7620 bytes)

Mushkin SEC w/ 3rd Party PCB 128MB
mushkin_sec_thirdpartypcb_128mb_front.jpg (7263 bytes)
128MB
mushkin_sec_thirdpartypcb_128mb_back.jpg (7280 bytes)
64MB
mushkin_sec_thirdpartypcb_64mb_front.jpg (7502 bytes)
64MB
mushkin_sec_thirdpartypcb_64mb_back.jpg (7640 bytes)

Mushkin SEC Originals w/ SEC PCB 64MB
mushkin_secoriginals_front.jpg (7647 bytes)
64MB
mushkin_secoriginals_back.jpg (7324 bytes)

Mushkin SIEMENS 64MB
mushkin_siemens_thirdpartypcb_64mb_front.jpg (7156 bytes)
64MB
mushkin_siemens_thirdpartypcb_64mb_back.jpg (7385 bytes)


The Results

100MHz FSB 112MHz FSB 124MHz FSB
CAS - 2 CAS - 3 CAS - 2 CAS - 3 CAS - 2 CAS - 3
Azzo PC133 100% 100% 100% 100% 100% 100%
Corsair Micron PC133 100% 100% 100% 100% 100% 100%
Corsair SEC 100% 100% 100% 100% 86% 100%
EMS PC133 HSDRAM 100% 100% 100% 100% 100% 100%
Goldstar LGS 100% 100% 100% 100% 100% 100%
Memman Mosel Vitalic 100% 100% 100% 100% 0% 0%
Memman SEC1 100% 100% 100% 100% 86% 100%
Memman SEC Originals2 100% 100% 100% 100% 100% 100%
Mushkin Hyundai 100% 100% 100% 100% 80% 100%
Mushkin SEC1 100% 100% 100% 100% 86% 100%
Mushkin SEC Originals2 100% 100% 100% 100% 100% 100%
Mushkin SIEMENS2 100% 100% 100% 100% 80% 100%
129MHz FSB 133MHz FSB
CAS - 2 CAS - 3 CAS - 2 CAS - 3
Azzo PC133 0% 100% 0% 0%
Corsair Micron PC133 100% 100% 0% 100%
Corsair SEC 0% 100% 0% 0%
EMS PC133 HSDRAM 0% 100% 0% 100%
Goldstar LGS 0% 66% 0% 0%
Memman Mosel Vitalic 0% 0% 0% 0%
Memman SEC1 0% 100% 0% 0%
Memman SEC Originals2 0% 100% 0% 86%
Mushkin Hyundai 0% 86% 0% 0%
Mushkin SEC1 0% 100% 0% 0%
Mushkin SEC Originals2 0% 100% 0% 86%
Mushkin SIEMENS2 0% 86% 0% 0%

1 - Third Party PCB
2 - Samsung (SEC) Made PCB

Corsair's Micron equipped modules provided the same stability results as EMS' PC133 HSDRAM that was recently put up for sale at http://www.pc133memory.com/. Unfortunately, the cost of the modules have kept them out of the reach of many users in the market for a memory upgrade.

While Micron was often criticized for recently having poor quality products, the Corsair/Micron combination seems like one that is quite unstoppable in comparison to the rest of the entries here. The PC133 specification should keep on improving, forcing manufacturers to produce higher quality modules that will hopefully, in the future, be stable at higher FSB frequencies. But for now, the Corsair/Micron combination is one of the most stable out there.