Hi, I have 2 pcs in home, and am about to sell one (i'll keep the best one) but I dont know wich of this two pcs is better, help me. This is the report of CPU-Z of PC1 CPU(s) Number of CPUs 1 Name Intel Pentium 4 Code Name Prescott Specification Intel(R) Pentium(R) 4 CPU 2.80GHz Family / Model / Stepping F 3 3 Extended Family / Model 0 0 Package mPGA-478 Core Stepping C0 Technology 0.09 µ Supported Instructions Sets MMX, SSE, SSE2, SSE3 CPU Clock Speed 2793.0 MHz Clock multiplier x 21.0 Front Side Bus Frequency 133.0 MHz Bus Speed 532.0 MHz L1 Data Cache 16 KBytes, 8-way set associative, 64 Bytes line size L1 Trace Cache 12 Kµops, 8-way set associative L2 Cache 1024 KBytes, 8-way set associative, 64 Bytes line size L2 Speed 2793.0 MHz (Full) L2 Location On Chip L2 Data Prefetch Logic yes L2 Bus Width 256 bits Mainboard and chipset Motherboard manufacturer Intel Corporation Motherboard model D865PERL, AAC27648-211 BIOS vendor Intel Corp. BIOS revision RL86510A.86A.0075.P15.0404021333 BIOS release date 04/02/2004 Chipset Intel i865P/PE/G/i848P rev. A2 Southbridge Intel 82801EB (ICH5) rev. 02 FSB Select 533 MHz Performance Mode enabled Graphic Interface AGP AGP Status enabled, rev. 3.0 AGP Data Transfer Rate 4x AGP Max Rate 4x AGP Side Band Addressing supported, not enabled AGP Aperture Size 64 MBytes This is the other pc (PC2) CPU(s) Number of CPUs 1 Name Intel Pentium 4 Code Name Northwood Specification Intel(R) Pentium(R) 4 CPU 3.00GHz Family / Model / Stepping F 2 9 Extended Family / Model 0 0 Brand ID 9 Package mPGA-478 Core Stepping D1 Technology 0.13 µ Supported Instructions Sets MMX, SSE, SSE2 CPU Clock Speed 2992.5 MHz Clock multiplier x 15.0 Front Side Bus Frequency 199.5 MHz Bus Speed 798.0 MHz L1 Data Cache 8 KBytes, 4-way set associative, 64 Bytes line size L1 Trace Cache 12 Kµops, 8-way set associative L2 Cache 512 KBytes, 8-way set associative, 64 Bytes line size L2 Speed 2992.5 MHz (Full) L2 Location On Chip L2 Data Prefetch Logic yes L2 Bus Width 256 bits Mainboard and chipset Motherboard manufacturer Intel Corporation Motherboard model D865PERL, AAC27648-209 BIOS vendor Intel Corp. BIOS revision RL86510A.86A.0071.P13.0401221036 BIOS release date 01/22/2004 Chipset Intel i865P/PE/G/i848P rev. A2 Southbridge Intel 82801EB (ICH5) rev. 02 FSB Select 800 MHz Performance Mode disabled Graphic Interface AGP AGP Status enabled, rev. 3.0 AGP Data Transfer Rate 4x AGP Max Rate 4x AGP Side Band Addressing supported, enabled AGP Aperture Size 64 MBytes The 2 pcs have the same amount of memory and the same HD, and same video card, but what i need to know is the main difference between the 2 processors. one have 2800 mhz of processor speed, 1024 cache and a bus speed of 532 but the other have 3000 mhz of processor speed, 512 cache and 800 of bus speed? got it? i dont know if the better bus speed will compensate the lack of cache, and i use the pc for gaming only (good games) Please let me know if i have to keep the pc1 or pc2 thanks Mobo: Intel 865PERL Chipset: Intel® 865PE CPU: Intel Pentium IV 2.8 GHZ RAM: 512MB DDR Video: SIS-315e 32MB Audio : SoundMAX4XL HD: Maxtor IDE 120GB

Go with #2 and take as much RAM as you can from #1 and add it to #2, then sell #1. The Secret Letter From Iraq

Ok Sabertooth, I'll sell #1 but can you explain me what is the advantages of having 800 front bus and the performance of 1024kb of cache instead of 512? pls pls pls thanks in advance Mobo: Intel 865PERL Chipset: Intel® 865PE CPU: Intel Pentium IV 2.8 GHZ RAM: 512MB DDR Video: SIS-315e 32MB Audio : SoundMAX4XL HD: Maxtor IDE 120GB

ahh forgot, the supported instruction of pc1: SS3... what is that? the pc2 doesnt have this. Mobo: Intel 865PERL Chipset: Intel® 865PE CPU: Intel Pentium IV 2.8 GHZ RAM: 512MB DDR Video: SIS-315e 32MB Audio : SoundMAX4XL HD: Maxtor IDE 120GB

PC 2 is better. Why? -The 533MHz bus of PC1 cripples performance significantly. 800MHz is a lot better. -The Northwood P4 of PC2 runs 200MHz faster, plus Northwoods run much cooler than Preshots. -The Northwood may only have 512KB of cache, but it's got a much shorter data pipeline (20 stages) to fill. It doesn't need the extra cache as much as a Prescott (31 stages) would. -SSE3 doesn't matter if your aren't into video editing. Even then, the performance advantage is minimal. The Northwood's 800MHz bus and higher clockspeed would easily make up for it. Check out my flickr stream.

- SSE3 Instrucion Set - FSB → 533/800Mhz = 4 x (133/200) → Quadpumped. - L2 Cache

Ok Sabertooth and Faz, you helped a lot i'll keep the pc2, thanks. Lesson learned. Mobo: Intel 865PERL Chipset: Intel® 865PE CPU: Intel Pentium IV 2.8 GHZ RAM: 512MB DDR Video: SIS-315e 32MB Audio : SoundMAX4XL HD: Maxtor IDE 120GB