ECS KV2 Extreme: Overclocking and Stress Testing

FSB Overclocking Results


Front Side Bus Overclocking Testbed
Processor: Athlon 64 FX53 Socket 939
2.4GHz
CPU Voltage: 1.5V (default)
Cooling: Thermaltake Silent Boost K8
Power Supply: Antec TruePower 430W
Maximum OC:
(Standard Ratios)
207FSB x 12.5
2587MHz (+8%)
Maximum FSB:
(Lower Ratio)
220FSB x 11 at 1:1 Memory

Our FX53 topped out at about 2.59 GHz on the ECS KV2, which is slightly below the 2.6+ achieved on the top 939 boards. However, ECS has the significant advantage of half multipliers, which are very useful for tweaking the KV2 for the best performance with any Athlon 64 CPU. While we clearly found a working PCI/AGP lock with PCI Geiger, the ECS still topped out at 219-220 CPU frequency in BIOS - a figure you would expect on a good board without a lock.

We were able to reach higher in Windows with the ECS overclocking utility, which they call Fuzzy OC, reaching a high of 236 at a multiplier of 10. We have seen this type of behavior on other early VIA K8T800 PRO boards, and we suspect ECS will be able to significantly improve these results with a BIOS update or board revision. If ECS manages to deliver better overclocking performance, the KV2 Extreme will be a formidable competitor. For now, we can say it performs quite well at stock speeds, and offers great promise in the overclocking area. It just isn't quite there yet as an enthusiast board.

Memory Stress Test Results:

The memory stress test basically determines the ability of the ECS KV2 to operate at its officially supported memory frequency (400MHz DDR), at the best performing memory timings that our Mushkin PC3500 Level 2 or OCZ PC3500 Platinum Ltd Modules will support. Memory stress testing was conducted by running RAM at 400MHz with 2 DIMM slots operating in Dual-Channel mode. ECS uses the more standard DC configuration of slots 1 and 3 for the first Dual-Channel bank, and 2 and 4 for bank 2.

Stable DDR400 Timings - 2 DIMMs
(2/4 DIMMs - 1 Dual-Channel Bank)
Clock Speed: 200MHz
Timing Mode: N/A
CAS Latency: 2.0
Bank Interleave: N/A
RAS to CAS Delay: 2T
RAS Precharge: 10T*
Precharge Delay: 2T
Command Rate: 1T
*Several memory tests have shown that memory performs fastest on the nVidia nForce and VIA K8T800 chipsets at a TRas (RAS Precharge) setting in the 9 to 13 range. We ran our own Memory Bandwidth tests with memtest86, with TRas settings from 5 to 15 at a wide range of different memory speeds. The best bandwidth was consistently at 9 to 11 at every speed, with TRas 10 always in the best range at every speed. The memory bandwidth improvement at TRas 10 was only 2% to 4% over TRas 5 and 6 depending on the speed, but the performance advantage was consistent across all tests. Since best performance was achieved at 2-2-2-10 timings, all Athlon 64 benchmarks were run at a TRas setting of 10.


The premium design of the KV2 paid off in memory performance, as the ECS was completely stable with 2 DIMMs in Dual-Channel at the best performing settings of 2-2-2-10. We have found that the best performance on Socket 939 boards is with a Command Rate of 1T, and the KV2 was very stable with a 1T Command Rate setting.

Filling all four available memory slots is more strenuous on the memory subsystem than testing 2 DIMMs on a motherboard.

Stable DDR400 Timings - 4 DIMMs
(4/4 DIMMs - 2 Dual-Channel Banks)
Clock Speed: 200MHz
Timing Mode: N/A
CAS Latency: 2.0
Bank Interleave: N/A
RAS to CAS Delay: 2T
RAS Precharge: 10T*
Precharge Delay: 2T
Command Rate: 2T

The ECS was able to run with all 4 DIMM slots at the same aggressive 2-2-2-10 settings used for 2 DIMMs. However, as we have seen on other 939 boards running all 4 DIMMs, Command Rate must be reduced to 2T when filling both Dual Channels.

ECS KV2 Extreme: Features and Layout Gigabyte K8NSNXP-939: Features and Layout
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  • bigtoe33 - Tuesday, July 20, 2004 - link

    Asus USA did block sales of the A8V but some US resellers decided to go it alone with imported european boards.
    While it does p1$$ me off that there were still boards in europe not upto scratch you have to commend Asus USA for blocking sales and trying to at least look after some customers...they are also honouring RMA's also.

    So #1 it does show some resarch was needed before you bought your board as i tried to let everyone know that the first boards available were not PCI lock fixed although any of them do work with the lock and work VERY well.
  • Wesley Fink - Tuesday, July 20, 2004 - link

    #1 - Asus never advertised or listed an AGP/PCI lock as a feature on the original release of the A8V Deluxe. That is the only reason we have not yet reviewed this board. While we did have a sample with a working lock, we have stated in every comment about the A8V in memory reviews and articles that Asus had not yet released a production board with this feature, but that they planned to implement this feature in the future.

    It is also our understanding that the US office even held release of the board to the US market, but many huge on-line vendors direct imported this board or brought it in from European sources. Since we were working with Asus, we know they tried very hard to hold release of this baord until they could work through issues of adding a stable PCI/AGP lock to the A8V.

    It is our understanding than Revision 2.0 will implement an AGP/PCI lock, but we have not yet seen the production board, which we expect this week. We will confirm the new feature when the board is received.

    We tried to caution readers about the AGP/PCI lock on early VIA boards as loudly as we could. In fact we got a lot of flak from manufacturers and VIA about our articles on the problems with the AGP/PCI lock on early VIA boards.

    Asus did not even list the AGP/PCI lock as an option on the AV8 Deluxe. Our suggestion is to contact Asus, but you got the features Asus advertised and listed for this board.
  • shamgar03 - Tuesday, July 20, 2004 - link

    I bought a ASUS A8V like 3 weeks ago, but in the article it says they are re-releasing it or something, does anyone know if they are going to patch that with bios updates, or did I just get the shaft?

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