HyperTransport Speed Benchmark

I decided to see how much the HT bus of the A64 actually effects performance. I have used 3DMark03, 3DMark01 and SiSoft Sandra 04. The speeds used for the HT are 800, 600 and 400 mhz. For the percentages, 800 mhz is the zero point.

<b>System Specs:</b>

Asus K8V Deluxe
AMD Athlon 64 3200+ @ 2.0Ghz
Geil PC 3200 2x512mb CAS 2-4-4-6
2x Western Digital Raptors 36gb Raid 0
AIW ATI Radeon 9800 Pro @ 378/337.5
Onboard Sound

<b>Software and Drivers:</b>

Windows XP Pro SP1
Direct X 9.0
Cat 3.10 drivers
Via 4 in 1 v4.49
Performace selected in Direct 3D tab
No FSAA/No AA

<b>3D Mark03:</b>

Score
800 mhz - 5863
600 mhz - 5891
400 mhz - 5884

% Difference
800 mhz - 0%
600 mhz - +0.004%
400 mhz - +0.003%

<b>3D Mark01:</b>

Score
800 mhz - 19808
600 mhz - 19682
400 mhz - 19763

% Difference
800 mhz - 0%
600 mhz - -0.07%
400 mhz - -0.03%

<b>SiSoft Sandra 04:</b>

<b>Cpu Arithmetic Score</b>

800 mhz:
Dhrystone ALU: 8324 Mips
Whetstone FPU/SSE2:3157/4101 MFLOPS
600 mhz -
Dhrystone ALU: 8297
Whetstone FPU/SSE2: 3156/4091
400 mhz -
Dhrystone ALU: 8297
Whetstone FPU/SSE2: 3156/4098

% Difference
800 mhz -
Dhrystone ALU: 0%
Whetstone FPU/SSE2: 0/0 %
600 mhz -
Dhrystone ALU: -0.04%
Whetstone FPU/SSE2: <.01%/<.01%
400 mhz -
Dhrystone ALU: -0.04%
Whetstone FPU/SSE2: <.01%/<.01%

Cpu Mutli-Media Benchmark

800 mhz
Integer iSSE2 -14934
Float iSSE2 - 19682
600 mhz
Integer iSSE2 - 14932
Float iSSE2 - 19686
400 mhz
Integer iSSE2 - 14931
Float iSSE2 - 19692

% Difference
800 mhz
Integer iSSE2 - 0%
Float iSSE2 - 0%
600 mhz
Integer iSSE2 - <.01%
Float iSSE2 - <.01%
400 mhz
Integer iSSE2 - <.01%
Float iSSE2 - <.01%

I was kind of suprised at the results and I don't think 1000mhz HT is going to help the A64 much. More benchmarks should be run before this is completely concluded though. When I get time i want to run some more thorough ones.

Anyones free to do the same

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Add witty comment here and beat this bad boy...
A64 3200+ w/ 1 GB DDR 400
2 36 gig raptors in Raid 0 complemented by an AIW 9800 Pro

It is a working peice of art here. There are only so many hours in a day. Like I said, you can help if you want .

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Add witty comment here and beat this bad boy...
A64 3200+ w/ 1 GB DDR 400
2 36 gig raptors in Raid 0 complemented by an AIW 9800 Pro

Hm... improving HT bus from 800 to 1000MT/s is probably not going to do wonders for them. An 800MT/s bus is already overkill for HDDs and PCI slots... Consider that 800MT/s is already a whopping 6.4GB/s and going up to 1000MT/s will give them an even 8GB/s... But honestly, HDD and PCI and gigabit ethernet and video cards combined wouldn't even achieve 5GB/s; so what is the point? So, this makes going from 6.4 to 8GB/s theoretically irrelevant, unless I'm missing something here.

<font color=red><b>M</b></font color=red>ephistopheles

thanks for you test

On top of that, I doubt 1000MT/s HT will migrate to Opteron any time soon.

Maxtor disgraces the six letters that make Matrox.

I'm not sure but I think that the need for bandwidth is about to change. You are running HL2 through your new express video card, at 100 fps. You are using windows x86. Since HL is only 32 bit, your other raid 0 is busy with some songs that you are sending to your server through your gigabit lan card. These Amd systems can really perform in multitasking with the new windows. Oh did I mension how much you like your 64 bit surround sound pci express sound system? So, how much HT bandwidth do you need?