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» The New Rebels Haven Forum!! » Hardware and Technology » Memory Modules, Information and Issues... » A64 Memory Runoff! (Page 1)

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Author Topic: A64 Memory Runoff! Polygon Admin Member # 1 posted                    In trying for a new personal best SuperPI score, the biggest issue I face is, what component has reached it's maximum first. The memory or the CPU? I know that the FX-55 under normal Water Cooled temps can hit 2.9Gig at various combinations of multipliers and FSB's that add up to 2.9Gig... But I really don't know what the memory maximum is at various timings.... So, up early this morning, I set out to test various timings to see where the memory crapped out... To do this properly, I'll run the CPU way below the default with 1.7Vcore and I'll run the memory at 2.85Vdimm. I set the multiplier for 9X, and the HTT for 3X, so as not to get anything else near it's limits. Note that the single shannel test was done at 8X for what will become obvious reasons... Here's The Test System Specs: MSI K8N Neo2 Platinum ADAFX55DEI5AS CAA2C 0442GPMW 7025v1.41 BIOS Vcore: 1.7V Vdimm: 2.85V 2-2-2-5 1T to 3-5-5-9 1T Mem timing 2X256Meg Kingston HyperX KHX3200ULK2/512 TCCD Chips (slots 1&2) and then: 2X256Meg A-Data Vitesta PC4800 DDR600 TCCD Chips (slots 1&2) GF2-MX200 Video Card Western Digital 40Gig ATA100 7200rpm Tagan TG-480Watt PSU Maze4 on CPU and Maze4 on nF3-Ultra Aside from finding out what I needed, some real suprises showed up! First here's the data, and then a screen shot of the suprise It must be noted the the A-Data memory modules are sold as singles and not as a "Dual Memory" set. I wonder why... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 Polygon Admin Member # 1 posted                    Just arrived, a day early I might add, PQI TURBO Series Dual Channel Platinum 184-Pin 512MB(256MB x 2) DDR PC-3200 ... I'll repeat the above tests and add the info to the chart.... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 Polygon Admin Member # 1 posted                    Well, the PQI Turbo Platinum PC3200 results have been added to the chart, and to say that I am disappointed is an understatement... As a sanity check, I spot-checked a couple of the old results and got the same numbers... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 NPlack Platinum Member Member # 479 posted                    Wow, thats horrible... Im glad i didnt order any of those. I wonder why the PQI performed so much worse than the rest??? And again i say WOW. -Plack -------------------- Lap: Dell Vostro 1500/1.6GHz C2D/4GB RAM/Nvidia 8400GS 128MB/15.4" Desk: E8400 9x433(3.9GHz)@1.35v/Gigabyte G33M-DSR2/4GB RAM/ATi 3850 256MB/37" Westinghouse 1920x1080 My Photo works on Deviant Art Posts: 1313 | From: Hephzibah, GA | Registered: Jan 2004 Polygon Admin Member # 1 posted                    I have no idea.... So far the Kingston is the clear winner.... It does 280FSB at cas2.5!!! -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 Azurael Bronze Member Member # 913 posted                    The A64 memory controller is a very strange beastie...I usually use 2x256MB sticks of TwinMOS PC3200 in pretty much all my rigs. The ram I took straight out of my Athlon rig (which has since been replaced with more TwinMOS which will clock the same) was running at 260MHz, cas2-3-3-11 at 3.3v on the nF2 (not bad for cheap year-old RAM, to say the least!). Put it in my A64 and I can't get it much over 200MHz, even given the max my EPoX will do (2.8v) or at any timings. At that time I tried the 2x512MB DS PC2700 unbranded sticks out of my P4 box, and I could just get the machine to boot with one of them in running at 166MHz. Both was a no POST at any voltage. Switched back to the PC3200 and went back to my happily asyncronous daily computing life. Since I got the DFI LP PRO875B Rev.B to relocate my P4 3.06 into (great board, by the way!), I figured I'd try swapping all the RAM around. Not only, given a BIOS update would the EPoX/A64 boot fine with both sticks of PC2700 in, it does so at 200MHz, cas2-3-3-10 perfectly stable with only 2.7v. Wierd, but I figure it's better to have more RAM if you can't have fast RAM. The PC3200 won't get properly tested in the P4 rig since it's running at less than 200MHz (P4 is an FSB533 part) but I might try to track down a cheap P4 'C' or 'E' to see how high it'll clock on an Intel board, but I figure A64s just don't like those specific chips. I also have a pair of early-ish TwinMOS PC3200 sticks with the fabled BH-5 chips on, but for some reason (at least on the DFI NF2 UI) it overclocks worse than the later ones with other makes of chips. I figure BH-5 requires a lot of voltage to get decent speeds, so I'll try them with the A64 once I've done the VDIMM mod (Need to find a 10k pot, I don't feel like buying a whole bag from Maplin just for that!) -------------------- EPoX 8KDA3J, A64 Newcastle @ 240x10, 1024MB, 6800 Ultra [ON SALE] DFI NF2 UI, AXP Barton-m @ 260x10, 512MB, 9500pro [ON SALE] DFI LP PRO875B, P4 Northwood-HT @ 150x23, 512MB, AIW 9800pro [ON SALE] Posts: 315 | From: 127.0.0.1 | Registered: Sep 2004 Polygon Admin Member # 1 posted                    Interesting..... I never thought to try 2-3-3-XX (for no good reason).... Will do so tonight.... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 oldandslow Platinum Member Member # 290 posted                    That really disapoints me. I already have the PQI and was planning on using it in an A64 system. It did 245 FSB single channel, 3,4,4,11, on the AN35. Most folks I'd read about up until now were getting 270-280 with P4 and A64 systems. Hopefully, I'll have better luck or it will be in the wife's yet to be built AN35 rig. -------------------- Shuttle AN35N/ 35w XP-M 2400+ IQYHA/ 2x256m Geil PC4400/ [10.5x245.6=2578 & 9.5x250.5=2380] Shuttle AN51R/ A64 3400+ Newcastle/ Tt Bigwater/ 1x512m Kingston HyperX TCCD/ [9x300.68=2706 & 8x325.5=2604] Posts: 1053 | From: Huntington, WV USA | Registered: Dec 2003 Polygon Admin Member # 1 posted                    I bought it based on a review in a A64 board and they claimed doing 271FSB @ cas 2.5, so...... I'll retest tomorrow, but I did re-do a number of various checks just to make sure what I was getting was correct.... I have found on ocassion where I had to reboot the system after SuperPI issued an error, else it issued errors almost at any clock frequency.... So the tests take a while.... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 Polygon Admin Member # 1 posted                    I re-tested the 3 types at a few different timings, and I got the same results once again... This time I added The GEIL PC4400 to the list.... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 Polygon Admin Member # 1 posted                    Non-MSI K8N Neo2 motherboard owners, should be aware that the results of this type of memory test, may not, or will not, be the same on other motherboards.... Todays high performance systems are extremely fussy as to which memory they like... More so then we have ever seen before.... I have 3 different A64 boards and they all have different memory preferences.... -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 Azurael Bronze Member Member # 913 posted                    Which is entirely down to BIOS engineers in the case of A64 boards, since the memory controller is in the CPU Seems strange that there's such variation. -------------------- EPoX 8KDA3J, A64 Newcastle @ 240x10, 1024MB, 6800 Ultra [ON SALE] DFI NF2 UI, AXP Barton-m @ 260x10, 512MB, 9500pro [ON SALE] DFI LP PRO875B, P4 Northwood-HT @ 150x23, 512MB, AIW 9800pro [ON SALE] Posts: 315 | From: 127.0.0.1 | Registered: Sep 2004 Polygon Admin Member # 1 posted                    Yes, it is odd.... I have been re-checking for 3 days now, and keep getting the same results..... I do a run with one pair of mem modules, shut down, install another brand, re-boot, and run the exact same tests! I almost don't believe it myself! I could understand 5-10Mhz, but those spreads are crazy! -------------------- Too Many Computers,... Too Little Time ..... Damn Phenoms! Posts: 25194 | From: Fire Island, NY | Registered: Feb 2003 BennyRop Platinum Member Member # 175 posted                    Keep it up, and pretty soon, we'll be sending our new boards to you to test out, and see which ram works best so we know what to buy.. -------------------- RHCF Rosetta challenge: Crunch faster than my single default speed 24/7 machine and put me in last place for the team. Help RHCF, prove your O/C abilities, run a Rosetta client or more. I dare you.. Posts: 1179 | From: Kodiak, Alaska | Registered: Jul 2003 StriderGT New Member Member # 1043 posted                    WOW You 're running these 1:1 FSB/Mem. I've read in some article that there isn't any performance hit if you run async. Have you done any benchmarks async? (I am new you migh have discussed that allready) I can hit 350 FSB async and the thing that prevents me going higher is the lack of HT multiplier below 3x. Some more detailed data on FSB scaling (not benchmarks) in my OC Athlon 64 Calculator -------------------- OCA64: Athlon 64 Overclocking Calculator Athlon 64 3000+ "Winchester" 2x512 DDR400 Kingston Value MSI K8N Neo2 Platinum NV GF4Ti4200 Tagan 380W Lian Li 1100B Posts: 7 | From: Greece | Registered: Nov 2004

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