The TCCD-pire Strikes Back? Athlon 64 S754 Memory Roundup

Memory by jmke @ 2004-11-30

We compared 5 different Samsung TCCD powered memory modules, discovering some surprising performance differences between them. To give these new TCCD chips a worthy competitor we also included results from Winbond BH-6 running with high VDIMM. How do they fair on an A64 S754 platform? Read on to find out

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G.Skill F1-3200DSU2-1GBLE

First up with have G.Skill’s memory modules which are rated for PC3200 at CL2 2-2-x and PC4400 at CL2.5 3-3-x on an Intel P4 setup.

They don’t come with fancy heat spreaders, but these don’t seem necessary at all as the sticks never became very hot during testing.

Madshrimps (c)
(click for close-up ~200kb/2500x900)


PCB design

G.Skill used Brain Power’s PCB for their modules, B6U808 to be precise:

Madshrimps (c)


Overclocking Experience

Using 2 memory modules the performance is severely impacted at relaxed timings. Reaching only 235Mhz, and as you can see, at that speed, performance is hardly different from running the memory at tight timings.

2 * G.Skill GSKILL F1-3200DSU2-1GBLE
Timings
FSB/CPU
Q3A
3DMark2001SE
CL2 2-2-10
211Mhz / 2215Mhz
365.4
14186
CL2.5 3-3-10
235Mhz / 2232Mhz
366.4
14186
CL3 4-4-10
<240Mhz
n/a
n/a



By removing one module from the system the performance spiked up, 290Mhz at more relaxed timings, up to 305Mhz! (That’s DDR610 for you!) with CL3. But as you can see from the performance numbers, the 15Mhz increase does not overcome the higher latency.

1 * G.Skill GSKILL F1-3200DSU2-1GBLE
Timings
FSB/CPU
Q3A
3DMark2001SE
CL2 2-2-10
211Mhz / 2215Mhz
364.5
14123
CL2.5 3-3-10
290Mhz / 2175hz
395.1
14556
CL3 4-4-10
305Mhz / 2287Mhz
389.1
14530


Using 2 sticks of G.Skill in your Socket 754 system is only advised if you want to run them at tight timings. If you’re happy with using only 1 stick, the sky’s the limit (well almost).
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